naturally occurring radioactivity (nor) in natural and anthropic environments
DESCRIPTION
AACIMP 2011 Summer School. Science of Global Challenges Stream. Lecture by Michele Guida.TRANSCRIPT
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Naturally Occurring Radioactivity Naturally Occurring Radioactivity (NOR) in natural and anthropic (NOR) in natural and anthropic
environmentsenvironments
interUniversity Centre for Research on the Prediction and Prevention of Major Hazards,
Italy
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The term
radiationsgenerally refers to a number of different physical phenomena,
which all have in common
the propagation of energy in space and time
When radiations hit or penetrate inside matter the energy is absorbed, causing , i. e. an increase of temperature around the absorption point.
Radiations
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Radiations
For example ,
the visible lightthe visible light,
the radio-TV waves,
the emission of particles or photons (X o ) by a radioactive element,
are all different forms of radiationsradiations.
Radiations can be simply subdivided into:
• particle-like radiationsparticle-like radiations
having a mass like the electrically charged particles and the neutrons, and
• wave-like wave-like radiationsradiations like phtotons ( X o ) which are massless and electrically charge less
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Radiations
The absorption of radiation by the matter in which it penetrates can cause not only a local increase of temperature but also that
The generated heat produces a combustion;
Light impresses a photographic film;
Damages more or less serious can be done to a living organism by the most energetic radiations.
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Radiations
The most energetic radiations, thus, can produce
a harmful action to biological matter, as a direct
consequence of the physical processes of “excitation”
and “ionization” of atoms and molecules contained in
the biological tissues hit by radiation.
According to the values of the energy and the effect
produced on the matter, radiations can be distinguished in:
Ionizing radiations
Non-ionizing radiations (EM radiation)
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Ionizing radiations
When a radtiation carries sufficient energy it is able to ionize matter, for example, a biological tissue in which penetrates, that is, producing free positive and negative charges . The ionization of matter can occur either directly or indirectly. Accordingly the ionizing radiations can be distinguished into:
• directly ionizing radiations and
• indirectly ionizing radiations
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Measurement Units of the radiation energy
The energy of radiation is typically measured in:
electronvolt (eV)
1 eV is defined like the energy that a unitary
charge (i.e., an electron) acquires travelling
across a potential difference of 1 Volt.
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Energy of radiations
• eV multiples:
• keV (100 eV) (X-rays)
• MeV (106 eV), (nuclear processes)
• GeV (109 eV). (pre-LHC* era particle accelerators)
• TeV (1012 eV) (LHC era)
• PeV (1015 eV) (cosmic rays)
• EeV (1018 eV) (cosmic rays)
*LHC = Large Hadron Collider @ CERN, Geneva, SwitzerlandLHC = Large Hadron Collider @ CERN, Geneva, Switzerland
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Some words about energies and their measument units
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Electromagnetic (EM) radiation propagates by means of transverse
waves with a velocity c = 3 108 m/s, in the vacuum and in the matter
with v = c/n , where n is the refraction index of the material in which it
travels.
EM radiation is characterized by :
• Intensity or Amplitude
• Wavelength , , (or frequency = c/n)
• Polarization
Electromagnetic (EM) radiation
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Waves
amplitude
wavelength (λ)
The energy carried by EM radiation increases with its frequency and diminishes with its
wavelength
Waves’ main characteristics: wavelengthwavelength and amplitudeamplitude
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Electromagnetic (EM) waves
IR - VISIBLE - UV = 1mm – 10-9mheat, light, chemical reactions
X-RAYS – GAMMA RAYS = 10-8 – 10-12mMedical diagnostic tools
MICROWAVES = 10cm – 1mmradar, mobile phones, ovens
RADIO = 1km – 10cmRadio-TV broadcasting
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EM spectrum in different scales:
wavelength ,
frequency, =c/
energy, E=h
Energy is measured in electronVolt (eV)
• 1 eV = 1.6 10-19 J
1 J = 1 Joule
EM waves spectrum
energia
Lunghezza d’onda
frequenza
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EM spectrum
Increasing energies (frequences )
Increasing wavelength ()
Infrared red orange giallo green blue purple ultraviolet
Example: heat example: sun tanning bed
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1fm 1pm 1nm 1μm 1mm 1m
GAMMA RAYS
X-RAYS ULTRA-VIOLET
INFRA-RED
MICRO-WAVES
RADIO WAVES
EM spectrum
WAVELENGTH (m)
VISIBLEVISIBLE
10-14 10-12 10-10 10-8 10-6 10-4 10-2 1 102
ENERGY
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Brief Review of Radioactivity and Radionuclides basic concepts
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Conventional notation for the chemical elements
•mass number A c (electric charge)
X
•atomic number Z
•X = symbol of the chemical element•atomic number Z = number of protons (electrons)•mass number A = number of nucleons (protons/neutrons)
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Periodic table of Atomic Elements Periodic table of Atomic Elements (by (by Dimitri Ivanovic MENDELEEV, 1869))
Z number of protons
period
gro
up
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Nuclides
• Element symbol X, mass number A and atomic number Z.
The following symbol denotes what in Nuclear Physics is
defined as NUCLIDE
XZ
A
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Isotopes and other iso-
According to A, Z e N (number of neutrons),
Nuclides can be distinguished in:
• Isotopes
• Isobars
• Isotones
• Isomers
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Isotopes and other iso-
Isomers43
56
99
Z
N
A
Tc99m
Tc99
43
56
99
«energy»
I130 131
Isotones53
77
130 131
54
77
Z
N
A
Xe
I131 131
Isobars53
78
131 131
54
77
Z
N
A
Xe222
Rn220
Rn
Isotopes
Z 89 89 N 133 131 ---- ----- ------ A 222 220
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Z-N diagram of Nuclides
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Radioactivity and the Atomic Nucleus
Radioactivity and the Atomic Nucleus
1896
Henri BECQUEREL discovered a so far unknown type of radiation (rays) emitted by Uranium minerals, capable to expose a photographic plate
1898
Pierre and Marie CURIE succeeded to discover and isolate 2 new radioactive elements: Polonium and Radium.
e -
Ernest RUTHERFORD investigated the nature of the different types of radiations emitted by radioactive materials:
rays 4 times heavier than Hydrogen,
rays essentially electrons,
rays chargeless, similar to X-rays but much more penetrating.
:stopped by 1/100 mm of aluminum plate.
:stopped by 1 mm of aluminum plate. Ernest RUTHERFORD Ernest RUTHERFORD
Pierre and Marie CURIE Pierre and Marie CURIE Henri BECQUERELHenri BECQUEREL
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Review of Radioactivity and …
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Radioactive Decays N
umbe
r of
pro
tons
Number of neutrons
Z
NA = N + Zc.e. = electronic capture
α
c.e.
)4,2(),( AZAZ
eAZAZ ),1(),(
eAZAZ ),1(),(
),1(..
),( AZec
eAZ
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Review of Radioactivity and …
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Review of Radioactivity and …
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Review of Radioactivity and …
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Review of Radioactivity and …
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Review of Radioactivity and …
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Review of Radioactivity and …
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Review of Radioactivity and …
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1908-1910 - Esperiments by GEIGER, MARSDEN and RUTHERFORD:
bombing of thin metallic plates with ; on the average 1 over 20000 was scattered at an angle larger than 90°.
1900 – THOMSON’s Atomic Model:
The atom is a homogeneous (electrically neutral) system, containing electrons uniformly distributed in it, whose charge is balanced by some point-like positive charges (“plumcake” model)
Rutherford’s Atomic Model: atom is a sort of a small solar system.
1919 – Rutherford assumed that inside the nucleus there were positively charged particles: protons.
Thomson’s Atom Thomson’s Atom
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1913 – atomic model: Emission or absorption of
quantized radiation (E = h ) only between two
“different energy states”.
Niels BOHR
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The energy levels The energy levels
What happens when energy is given to the What happens when energy is given to the atom? atom?
Excited states
Ground state
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2 PROTONS2 NEUTRONS
Radiation Radiation Radiation Radiation
....
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Radiation Radiation
.1 ELECTRON
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RadiationRadiation RadiationRadiation
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Relative Penetrating Power
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Review of Radioactivity and …
= 3.7 x 1010 Bq old unit
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Review of Radioactivity and …
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Review of Radioactivity and …
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NORM Definition
Naturally Occurring Radioactive Material (NORM)
– any nuclide that is radioactive in its natural state (i.e. not man-made), but not including source, by-product, or special nuclear material.
The associated radioactivity is
Naturally Occurring Radioactivity (NOR)
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Types of NOR
Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006M. Guida, Università di Salerno, ItaliaM. Guida, Università di Salerno, Italia
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Uranium-2384.5 By
Radon-2223.8 d
Radium-2261620 Y
Th-234Pa-234U-234Th-230.
Principal decay Scheme of Uranium
Radon –Daughters
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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Naturally Occurring Radioactive Materials NORM
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• ¿Qué es NORM y TENORM?
• Recopilación de industrias afectadas
• Minería y procesado de metales: Al, Cu, TiO2, Zr, Fe-acero, Sn, oro, arenas de minerales pesados, etc.
• Industrias de minerales Producción de fertilizantes fosfatados
Cerámicas y materiales de construcción
• Combustibles: Petróleo y gas
Centrales térmicas de carbón
• Otras actividades Producción de energía geotérmica
Tratamiento de aguas: potables y residuales
Where anthropogenic Norm & Tenorm?
M. Guida, Università di Salerno, ItaliaM. Guida, Università di Salerno, Italia Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006
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Actividades que pueden generar NORM
Minerales y materiales
extraídos
Otros procesos
Aluminio
Cobre
Yeso
Hierro
Mo
Fosfato
Fósforo
Tierras raras
Estaño
Titanio
Zirconio
Térmicas de carbón
Energía geotérmica
Petróleo y gas
Tratamiento aguas residuales
Pasta de celulosa
Fabricación de cerámica
Dióxido de titanio
Fundición metales (Fe, Cu, etc.)
Arenas abrasivas y refractarias
Materiales de construcción
Electrónica
M. Guida, Università di Salerno, ItaliaM. Guida, Università di Salerno, Italia Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006
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Principal radionuclides occurring
Radionucleido SemividaTipo de
radiaciónComentarios
40K 1.28·109 a β, γ No genera cadena
238U234U
230Th226Ra222Rn210Pb210Po
4.47·109 a
2.5·105 a
7.54·104 a
1600 a
3.82 d
22 a
138.4 d
α, γ
α
α, γ
α, γ
α
β, γα, γ
Genera fraccionamiento de 4 subseries con T1/2 alto:
238U, 230Th, 226Ra y 210Pb
235U231Pa227Ac
7.04·108 a
3.3·104
22 a
α, γ
α, γ
α, γ
Poco interés radiológico ya que:
(235U) = 0.044 (238U)
232Th228Ra228Th
1.41·1010 a
5.75 a
1.91 a
α, γ
βα
Genera fraccionamiento de 3 subseries con T1/2 alto:
232Th, 228Ra y 228Th
M. Guida, Università di Salerno, ItaliaM. Guida, Università di Salerno, Italia Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006
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Brief History of NORM in Oil & Gas industry
Early accounts of NORM Canadian oil field (1904)
Radium in Russian fields (1930)
Uranium in gas formations (1953)
NORM in north sea (1985)
Guidelines (API, IAEA, etc.)
Regulations
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• The oil and gas industry is a global industry that operates in many of the Member States of the IAEA.
• There are several sectors in the industry, including:
• (a) The construction sector responsible for manufacturing and fabricating facilities and equipment,
• (b) The exploration sector responsible for finding and evaluating new resources,
• (c) The production sector responsible for developing and exploiting commercially viable oil and gas fields,
• (d) ‘Downstream’ sectors dealing with transport of the raw materials and their processing into saleable products,
• (e) Marketing sectors responsible for the transport and distribution of the finished products.
•
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• Radioactive materials, sealed sources and radiation generators are used extensively by the oil and gas industry, and various solid and liquid wastes containing naturally occurring radioactive material (NORM) are produced.
• The presence of these radioactive materials and radiation generators results in the need to control occupational and public exposures to ionizing radiation.
• Various radioactive wastes are produced in the oil and gas industry, including the following:
• (a) Discrete sealed sources, e.g. spent and disused sealed sources;
• (b) Unsealed sources, e.g. tracers;
• (c) Contaminated items;
• (d) Wastes arising from decontamination activities, e.g. scales
and sludges.
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• These wastes are generated predominantly in solid and liquid forms and may contain artificial or naturally occurring radionuclides with a wide range of half-lives.
• Work activities and situations which involve potential exposure to ionizing radiation and radioactive materials:
(a) Industrial radiography, including underwater radiography;
(b) Use of installed gauges, including those used to make level and density measurements;
(c) Use of portable gauging equipment;
(d) Well logging, including ‘measurement while drilling’ and wireline techniques;
(e) Work with radiotracers;
(f) Generation, accumulation and disposal of NORM and the decontamination of equipment contaminated by NORM;
(g) Radioactive waste management;
(h) Accidents involving radioactive sources and materials.
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Which NORM !
NORM nuclides of interest to oil & gas industry
Radium-226 & Radium-228 Uranium Radon-222 Lead-210 Polonium-210
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Origins of NORM in the Oil & Gas IndustryOrigins of NORM in the Oil & Gas Industry
Courtesy by
Gas/Oil Separation Plants (GOSP)
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Radiation Emitted by NORM
Gamma rays
Ra-226 and Pb-210
Beta particles
Ra-228, Pb-210, Bi-210
Alpha particles
Ra-226,U-238,Po-210 and Pb-210
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Radioactive Material/ Sources found or used in the
Oil and Gas Industry
Offshore Operations
Naturally Occurring Radioactive Material (NORM)
Radiography
Surveys
Well Logging
Nucleonic Gauges
Safety Systems
Tracers
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Naturally Occurring Radioactive Material (NORM)
• Contaminated plant / equipment / pipework sent for cleaning
• Waste removed from vessels and pipelines sent for treatment / disposal
• Samples sent for radiochemical analysis
• Radionuclides present may differ, e.g. -
Ra-226, Ra-228 + Daughters
Pb-210, Po-210 + Daughters
• Excepted Packages, Industrial Packages and Unpackaged SCO-1
• UN2910, UN2912, UN2915
• Sea, Road and Rail
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Where NORM accumulates
Scale
Scrapings
Sludge
Thin films (radon progeny)
NORM may accumulate in the following
media:
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NORM in Scale
Courtesy by
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NORM in Scale
Types of scales
Sulfate: SrSO4 and BaSO4 (RaSO4)
Carbonate: CaCO3 (RaCO3)
Effect of water mixing Change in pressure/temperature Scale accumulates in: production tubing, well head,
valves, and pumps Scale inhibitors
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NORM in Pipelines Scrapings
Crude pipelines
(Radium & Pb-210) Seawater pipelines
(Uranium)
Courtesy by
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Radon progeny
Pb-210 (22 years)
Po-210 (138 days)
Bi-210 (5 days)
Form thin films on: compressors, reflux pumps, control valves, product lines/vessels.
NORM in Gas Processing Facilities
Radon path Boiling Point(K, 1 Atm)
Ethane 185
Radon 211
Propane 231
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NORM Exposure Scenarios
Contamination
Inhalation
Ingestion
Absorption
Irradiation
External Exposure
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NORM Health Impact
No short-term acute effects
Chronic exposure(unprotected)
Higher possibility of cancer
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NORM Regulations
Specifies contamination limits: Equipment, waste and soil
Nuclide dependent
Country dependent
EURATOM 96/29 “May 2000”
CountryLimit of 226Ra
(pCi/g)
Canada 8
UK 10
USA 5 to 30
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NORM Levels
Specific Activity (pCi/ g)
Nuclide Scale Sludge Scrapings
Ra-226 2.7 – 405000 1.4 – 21600 0.3 – 2000
Pb-210 0.5 – 2025 2.7 – 35100 1.4 – 1350
Po-210 0.5 – 41 0.1 – 4320 2.7 – 108
World wide reported levels of NORM
Courtesy by
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MediumSpecific activity
pCi/liter
Natural gas 0.14 – 5400
NGL 0.27 – 40500
Propane 0.27 – 113400
Radon gas (Rn-222) EPA limit for Radon in air is 4 pCi/ liter
NORM in Natural Gas
Courtesy by
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Workers’ Radiation Dose
Worker’s dose depends on: Type of work
Cleaning vessels/tanks Maintenance
NORM activity Time Protective measures
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Workers Protection Awareness/training
Protective clothes
Respirators’ use
Practice good hygiene
Limited work scenarios
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NORM Monitoring
NORM Detected?
Normal Operation
NORM Free Equipment
Identify NORM Contaminated
equipment/waste
Decontaminate NORM
equipment
WorkersProtection &
Contam. Control
Assess Radiological
Risks
Interim Storage of NORM equipment
NORM Waste PermanentDisposal
NORM wasteInterim Storage
Yes
No
NORM Contaminated Equipment
NORM Waste
NORM Waste
NORM Management Process Cycle
Release for general use
Courtesy by
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Naturally Occurring Radioactive Material (NORM) sent to Drigg
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Radiography
• Service companies supply and use source(s)
• Example radionuclides -
Iridium-192
Selenium-75
Ytterbium-169
• Type A and B Packages
• UN3332, UN2916 and UN2917
• Air, Sea and Road
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Survey Work
• Service companies supply and use source(s)
• Example radionuclides - Californium-252
Caesium-137
• Excepted and Type A Packages
• Road and Sea
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Well Logging
• Service companies supply and use source(s)
• Example radionuclides - Am-241 / Be
Cf-252
Cs-137
H-3
• Excepted Packages, Type A and Type B
• Road and Sea
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Summary - Packages & Uses
• Excepted Packages
NORM samples, smoke detectors, ‘low’ activity sources
• Industrial Packages
NORM contaminated equipment and waste
• Unpackaged
NORM contaminated tubing / drill pipe
• Type A and B (U) and (M) Packages
‘High’ activity sources
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What Next about NORM in industry?Concluding remarks (P. A. Burns) from
the International Radiation
Protection Association (IRPA), 12th International Congress,
Buenos Aires, Argentina, 19-24 October 2008
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What’s out there (IRPA 12 cont’d)
• Wide variety of NORM industries:- Uranium, Rare Earth minerals;
- Coal, Oil, Gas;
- Phosphates, Mineral Processing and others;
• NORM can concentrate in:
Products, by-Products and residues
• Exposure to large populations: small doses
• Exposure to small populations: larger doses- Occupational exposure
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How to measure it (IRPA 12 cont’d)
Difficult measurement situations:
• Measurement of Activity or activity concentration:- Long decay chains – Disequilibrium
- Hard to measure – radium, radon, thoron, Pb210, Po210.
• Modelling exposure pathways- Lot of assumptions
- Averages adopted for widely varying situations
• Assessing doses to individuals
- Large uncertainties – internal exposure
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What to do about it (IRPA 12 cont’d)
• No one solution to NORM management
• Wide variety of regulatory instruments required
• Graded approach- Exclusion, exemption, clearance, notification
- Registration, licensing
• Managed as planned or existing exposure situations- Dose constraints or reference levels
• Numbers of people exposed and magnitude of exposures should be optimised within Dose Bands
• Flexibility required
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What about NORM in Europe?
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Summary
NORM is a global issue for the oil & gas industry
NORM health hazards are controllable
Implementing NORM procedure will not obstruct operations
NORM limit varies
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NATURALLY OCCURRING RADIONUCLIDES IN RAW MATERIALS
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WATER PROCESSING: DRINKING and WASTE WATERS
EUROPEAN COMMISSION, Sewage Sludge, Directorate General for the Environment, EC, Brussels, http://europa.eu.int/comm/environment/sludge/index.htm.
T. Gafvert, C. Ellmark, E. Holm. Removal of radionuclides at a waterworks. Journal of Environmental Radioactivity 63 (2002) 105–115.
Lodos 239/240Pu 232Th 234U 238U 137Cs 210Pb 7Be
Al(OH)3 0.86 4.53 45.0 61.8 < 2 230 280
Fe(OH)3 0.72 4.54 43.7 62.8 < 2 368 353
ACTIVIDAD (Bq/kg seco) en lodos Al(OH)3 y Fe(OH)3
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Origins of NORM in Natural Environments
NORM in earth crust NORM in reservoir rock formations
Uraniumppm
Thoriumppm
Limestone 0.03 - 27 0 - 11
Sandstone 0.1 - 62 0.7 - 227
NORM in Formation water NORM in Natural gas NORM in Sea water
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Uranium-2384.5 By
Radon-2223.8 d
Radium-2261620 Y
Th-234Pa-234U-234Th-230.
Principal decay Scheme of Uranium
Radon –Daughters
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La radiación natural a la que está expuesta la población proviene de la desintegración de isótopos radiactivos en la corteza terrestre, de la radiación cósmica y de los isótopos radiactivos que forman parte de los seres vivos, también llamada radiación interna
Radón 40%
Tratamientos Médicos 17%
RayosCósmicos12%
RadiaciónGamma 15%
RadiaciónInterna 15%
Otros 1%
M. Guida, Università di Salerno, ItaliaM. Guida, Università di Salerno, ItaliaUniversidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006
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Diagnóstico Radiológico (Rayos X)
Medicina NuclearRadioterapia
El uso de la radiación en el diagnóstico y el tratamiento de enfermedades se ha convertido en una herramienta básica en medicina. Con ella se ha podido realizar exploraciones del cerebro y los huesos, tratar el cáncer y usar elementos radiactivos para dar seguimiento a hormonas y otros compuestos químicos de los organismos.
M. Guida, Università di Salerno, ItaliaM. Guida, Università di Salerno, Italia
Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006
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Corso di Laurea in Ingegneria Civile
UNIVERSITA’ DEGLI STUDI DI SALERNOUNIVERSITA’ DEGLI STUDI DI SALERNO Facoltà di IngegneriaFacoltà di Ingegneria
Building Materials
brick
granite
Radioactiviy Index I : (Radiation Protection 112, 2000)
I = AI = AThTh/200+A/200+ARaRa/300+A/300+AKK/3000/3000
Concrete block
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Materiali da costruzioneConcentrazione media di
226Ra (Bq/Kg)Concentrazione media di 232Th (Bq/Kg)
Concentrazione media di 40K (Bq/Kg)
Indice di Radioattività
travertino 1 0 4 0,004
Marmo 4 1 8 0,021
Calcare 12 1 5 0,046
Gesso 8 3 160 0,095
Calce 9 6 265 0,148
Ghiaia 15 14 157 0,172
Calcestruzzo 22 16 237 0,232
Coppi 59 12 238 0,336
sabbia 18 22 530 0,346
Laterizi 29 26 711 0,463
Pietra 24 37 645 0,48
Argilla 37 40 550 0,506
Piastrelle 43 36 689 0,553
Serizzo 31 42 782 0,574
Cemento 42 66 369 0,593
Trachite 36 52 1154 0,764
Porfido 41 59 1388 0,894
Beole 63 48 1432 0,927
Gneiss 87 71 1040 0,991
Granito 89 94 1126 1,142
Ceneri di carbone 160 130 420 1,323
Peperino 159 171 1422 1,859
Pozzolana 164 229 1341 2,138
Sienite 317 234 1255 2,645
Tufo 209 349 1861 3,062
Lava 473 230 1781 3,32
Basalto 308 466 2178 4,082
I< 0.5
0.5 < I<
1I >
1
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Corso di Laurea in Ingegneria Civile
UNIVERSITA’ DEGLI STUDI DI SALERNOUNIVERSITA’ DEGLI STUDI DI SALERNO Facoltà di IngegneriaFacoltà di Ingegneria
indice di radioattività dei materiali da costruzione
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Radioactivity Index I in building materials
F. Vigorito, Tesi di Laurea in Ingegneria Civile, Università di Salerno, 2006
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Radon: Overview of Properties
• Radon is a unique natural element in being a gas, noble, and radioactive in all its isotopes.
• Radon is the heaviest member of the noble gas family and is colorless, odorless, relatively chemically inert, naturally radioactive, and has the highest melting point, boiling point, critical temperature and critical pressure of noble gases.
• It is soluble in water and has a higher solubility in some organic solvents.
• As a noble gas, it is not immobilized by chemically reacting with the medium that permeates.
• Free radon normally diminishes only by its radioactive decay as it moves from its source.
• Its radioactivity allows radon to be measured with remarkable sensitivity.
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The three primary sources for natural radon are the parent
isotopes of the two uranium series (238U and 235U) and the
Thorium series (232Th).
U 2384,5 109 y
Ra 2261622
y
Rn 2223,82 d
Po 2183.05 min
Pb 21426,8 min
Bi 21419,7 min
Po 2141,6 10-4 s
Pb 21022,2 yBi
2105,03
dPo 210138,4 d
Pb 206stable
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Radioactive Decay• Radioactive decay:
• The solution is:
• λ is related to the half-life:
• For the general case of A→ B, where both A and B are radioactive , the differential equation describing the production of B from the decay of A and the subsequent radioactive decay of B:
If the half-life of the daughter radionuclide B is much shorter than the half-life of the parent radionuclide A, the decay rate of A, and hence the production rate of B, is approximately constant, because the half-life of A is very long compared to the timescales being considered.
Ndt
dN
21
2ln
t
teNtN 0)(
BBAAB NN
dt
dN
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Radon Secular Equilibrium
As Radon has a half-life (3.82 d) much longer than its daughter
radionuclides (218Po – 3.05 m, 214Pb – 26.8 m, 214Bi – 19.7 m)
a radioactive equilibrium (called secular equilibrium) is achieved
after approximatively 3 h.
After that time,
the activity concentrations of the
short-lived decay products
are essentially equal to
that of the radon parent.
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Release Mechanism
• Most radon that is produced by the decay of radium never escapes from the mineral in which it is born.
• The small fraction of radon that escapes is either released promptly as it is born or within the few days before it decays.
• The release mechanism is the direct ejection of the radon atom by recoil from alpha emission.
• Conservation of momentum reveals that emission of an alpha particle with 4.78 MeV by 226Ra gives the 222Rn nucleus a recoil energy of 86 keV.
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Release Mechanism
Inside the same mineral
grain
From one mineral to adjacent mineral
From mineral to water
Stopped by intergranural material
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If the pore space contains water, the ejected radon atom will rest in the liquid and is free to diffuse from the water or be transported by it.
If the interstitial space is dry (i.e. filled only with soil gas) and not wide enough to stop the recoiling radon, it will enter a neighboring grain.
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222Rn: a Naturally Occurring Tracers for investigation of transport phenomena in the
Litosphere: Emanation and Exhalation
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Radon Entry Into a Home
1. Cracks in Solid Floors2. Construction Joints3. Cracks in Walls4. Gaps in Floors5. Gaps around Pipes6. Cavities in Walls7. Water Supply (wells only) 3.
4.
1.2.
7.6.
5.
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Main sources of Radon in a confined space
building materials 2-5%
water < 1%
soil: 85-90% + diffusion 1-4%
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UNIVERSITA’ DEGLI STUDI DI SALERNOUNIVERSITA’ DEGLI STUDI DI SALERNO Facoltà di IngegneriaFacoltà di Ingegneria
Corso di Laurea in Ingegneria Civile per l’Ambiente ed il Territorio
Bq/m 3 – 20 40
Piemonte
Valle d’Aosta
Liguria
Toscana
Lombardia
Friuli- Venezia
Giulia
Alto Adige
Trentino
Veneto
Emilia-Romagna
Marche
Abruzzo Lazio
Sardegna Campania
Molise
Puglia
Basilicata
Calabria
Sicilia
Umbria
40 60– Bq/m 3
60 80– Bq/m 3
80 100 – Bq/m 3
100 120 – Bq/m 3
Indagine nazionale sulla radioattività naturale nelle abitazioni (ANPA, ISS;1989 - 1993)
Lithological Map 97 Bq/m3
Campania
Annual mean concentrations of Indoor Radon
Italia: 70 Bq/m3
Europa: 59 Bq/m3World: 40 Bq/m3
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Indagine nazionale radon Indagine nazionale radon (1989-1997) (1989-1997)
• N. di edifici 5361
• N. di città 232
• Max (Bq/m3) 1036
• Media aritm. (Bq/m3) 70
• Std Error (Bq/m3) 1
Frazione di edifici (totale 20.000.000)
> 200 Bq/m3 4,1 % ≈ 800.000
> 400 Bq/m3 0,9 % ≈ 200.000
Bq/m3
20 - 40 40 - 60 60 - 80 80 - 100100 - 120
M. Guida, Università di Salerno, ItaliaM. Guida, Università di Salerno, ItaliaUniversidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006Universidad Nacional del Altiplano, Puno, Perù, 7 Febbraio 2006
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Soil (_S)
Zom
ing
(_ZN
G)
RAD_CAMPANIA (RAD_CMP)
AD
B S
inis
tra S
ele
BU
SSE
NT
O
Inte
r-R
egio
nal
Auth
ori
tyfo
rSele
basi
n
UT
A 2007
MalletLabora
tory
(Sale
rno P
rovin
ce)
AD
B S
inis
tra S
ele
MIN
GA
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O
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B D
est
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TU
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A 2
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Dwellings (_B)
CO
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hquakes(_
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Str
ati
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phy
(_ST
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Mate
rials
(_M
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Water (_W)
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Mari
ne (_
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Spri
ngs(_
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Conta
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ed
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(_C
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Soil-H
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(_SH
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Str
uctu
res(_
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EN
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2007
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2007
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2007
Journal of Technical & Environmental Geology, XVI, 2 (April/June), 38-62, 2008).
General Functional Scheme of the Interdepartment Research Programme RAD_CAMPANIA
in collaboration with C.U.G.RI., and the Regional Agency for the Environmental Protection ,ARPA Campania
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CAMPANIAITALIA
WHERE WE AWHERE WE ARE
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Multiscalar hierarchical levels for the assessment of theAreas with the highest potential concentrations of exhalated soil-gas Radon (Radon-prone Areas)
Journal of Technical & Environmental Geology, XVI, 2 (April/June), 38-62, 2008).
Region Level: scale <1:250,000
Province level: scale <1:100,000
District Level : scale <1:25,000
Zone Level : scale <1:5,000-2,000
Site Level : scale 1: 2,000
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Lithological Systems Map of Campania Region (modified from BLASI C. et al., 2007)
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(Cuomo A., Tesi di Laurea in Ing. Civile A&T, 2007; Journal of Technical & Environmental Geology, XVI, 2 (April/June), 38-62, 2008).
Preliminary assessment from the lithological map and literature
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(Cuomo A., Tesi di Laurea in Ing. Civile A&T, 2007; Journal of Technical & Environmental Geology, XVI, 2 (April/June), 38-62, 2008).
Preliminary map of the Radon-prone Areas after the application of the multiscalar hierarchical adaptive approach
PRIGNANO
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Flow-chart diagram showing the applied methodology for the production of the Radon-prone Areas.
Journal of Technical & Environmental Geology, XVI, 2 (April/June), 38-62, 2008).
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UNIVERSITA’ DEGLI STUDI DI SALERNOUNIVERSITA’ DEGLI STUDI DI SALERNO Facoltà di IngegneriaFacoltà di Ingegneria
Corso di Laurea in Ingegneria Civile per l’Ambiente ed il Territorio
Procedura adottata per le misure eseguite con RAD7
(Pelosi A., Tesi di Laurea in Ingegneria, 2007)
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UNIVERSITA’ DEGLI STUDI DI SALERNO
Facoltà di Ingegneria Corso di laurea in Ingegneria civile
Misura nel suolo con strumentazione attiva: Rad7
Lo strumento è stato assemblato;
Si è verificata la percentuale di umidità presente nello strumento e poichè questa superava il 7% allora si è passati all’operazione di purge.
si è infissa la sonda nel punto di misura e costipata la porzione di terreno che la circonda;
è posizionato all’ estremità del tubo un manometro e si è collegata la sonda allo strumento;
si è avviata la misura selezionando dal menu dello strumento la funzione start;
(L. Serrapica, Tesi di Laurea in Ingegneria, 2007)
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UNIVERSITA’ DEGLI STUDI DI SALERNOUNIVERSITA’ DEGLI STUDI DI SALERNO Facoltà di IngegneriaFacoltà di Ingegneria
Corso di Laurea in Ingegneria Civile per l’Ambiente ed il Territorio
Set di dati a cui sono stati applicati dei criteri di selezione
ID_MIS COD_S_RN COD_MIS DATA RN_CONC
1 _01 _01 12/10/2007 913 [Bqm-3]2 _02 _01 12/10/2007 70.500 [Bqm-3]3 _03 _01 13/10/2007 10.200 [Bqm-3]4 _04 _01 13/10/2007 51.000 [Bqm-3]5 _05 _01 13/10/2007 7.870 [Bqm-3]6 _06 _01 13/10/2007 57.800 [Bqm-3]7 _07 _01 15/10/2007 55.000 [Bqm-3]8 _08 _01 15/10/2007 4.120 [Bqm-3]9 _09 _01 16/10/2007 43.100 [Bqm-3]10 _10 _01 19/10/2007 56.000 [Bqm-3]11 _11 _01 20/10/2007 25.800 [Bqm-3]12 _12 _01 20/10/2007 2.950 [Bqm-3]13 _13 _01 20/10/2007 9.030 [Bqm-3]14 _14 _01 20/10/2007 121.000 [Bqm-3]15 _15 _01 27/10/2007 8.370 [Bqm-3]16 _16 _01 27/10/2007 7.000 [Bqm-3]17 _17 _01 02/11/2007 4.310 [Bqm-3]
Interpolazione mediante kriging dei dati di concentrazione
(Pelosi A., Tesi di Laurea in Ingegneria, 2007)
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Radon as Aqueous Tracer
• Radon is continuously produced via α-decay of its parent nuclide radium, which is commonly found in soil and aquifer material
• Radon is a ubiquitously occurring natural component of groundwater, occurring as dissolved gas
• The chemical and physical properties of radon and its behavior in groundwater allow for its use as naturally occurring aqueous tracer
• It is a natural constituent of groundwater and therefore has not to be injected into the aquifer for the sake of a tracer experiment
• Radon can be detected very precisely also at low concentrations, due to its radioactive nature
• Because of the chemical inertness of Radon, its transport in groundwater systems is controlled only by molecular diffusion and by the flow of groundwater itself
• The only other process that has any significant effect on radon, once it is in solution in groundwater, is outgassing
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Work in progress
• Involvement in the
EUROPEAN RADON GEOGENIC MAP PROJECT
(ERGM)
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RADON -222 : A Naturally Occurring Radioactive Tracer in Hydrosphere
Assessment of the Submarine Groundwater Discharge (SGD)
Evaluation of the contamination of aquifers
Assessment of the Groundwater Discharges in Lakes
UNIVERSITA’ DEGLI STUDI DI SALERNOUNIVERSITA’ DEGLI STUDI DI SALERNO Facoltà di Ingegneria Facoltà di Ingegneria
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How to measure RADON-IN-WATER: RAD7: Radon Monitor
RAD7 has an internal sample cell of a 0.7L hemisphere, with a solid state detector at the center.The inside of the hemisphere is coated with an electrical conductor which is charged to a potential of 2-4 kV relative to the detector.Positive charged progeny decayed from 222Rn and 220Rn are driven by the electric field towards the detector.When a progeny atom reaches the detector and subsequently decays and emits an alpha particle , the alpha particle has a 50% probability of being detected by the detector.As a result an electrical signal is generated with the strength being proportional to the alpha energy.RAD7 will then amplify and sort the signals according to their energies.The RAD7 spectrum is a scale of alpha energies from 0 to 10 MeV, which is divided into 200 channels each of 0.05 MeV width.
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RAD7 Alpha Energy Spectrum
6.00 MeV Alpha from 218Po (t1/2 = 3 min)
6.78 MeV Alpha from 216Po (t1/2 = 0.15 s)
7.69 MeV Alpha from 214Po
8.78 MeV Alpha from 212Po
The alpha energies associated with 222Rn and 220Rn are in the range of 6-9 MeV. The channels related to them are grouped in 4 energy windows (labeled as A-D)
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RADH2O System
• The RADH2O is an accessory of the RAD7 that allows to measure radon-in-water
• The lower limit of detection is less than 0.3 Bq/L• It gives results in 30 minutes• The RADH2O method employs a closed loop aeration scheme in which
the air volume and the water volume are constant
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RADH2O System
• A sample bottle is connected to the RAD7 in a closed loop mode
A dessiccant tube is placed before the air inlet of the counter.
Its purpose is to adsorb moisture
The sample bottle has a special screw-on cap with two ports.
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RADH2O System
The technique consists in bubbling air directly into waterThe internal air pump of the RAD7 circulates the air at a flow rate of about 1L/min through the water and continuously extracts the radonThe radon from the water sample circulates through the desiccant column, then through the RAD7’s chamber, and then back to water sample until an equilibrium between radon in water and in air is reachedThe RADH2O system reaches this state of equilibrium within 5 minutesAfter the radon air-water equilibrium is obtained, the radon activity concentration in the air loop is measured by counting alpha particles emitted by radon daughters in the chamber
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• The activity concentration of radon in water is calculated from the distribution factor of radon between water and air given by Weigel:
• The actual activity concentration in the water sample is given by:
As the volumes are fixed, the RAD7 gives automatically the result of Cwater
• The activity concentration at the sampling istant is given by:
where λ is radon’s decay constant: λ = 0.1814 d-1
RADH2O System
Tw ek 502.0405.0105.0
waterairwairairwaterwater VCkVCVC
tetCC )(0
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• Another way to make an air circuit coupled to water, in order to extract radon from it, is to separate water and air through a diffusion membrane.
• A suitable experimental set-up consists of the Durridge RAD7 in closed loop with a Durridge water probe
• The Durridge water probe consists of a semi-permeable membrane tube mounted on an open wire frame.
• The probe is placed in a closed loop with the RAD7
Water Probe
•When the probe is lowered into water, radon passes through the membrane until the radon concentration in the air in loop is in equilibrium with the radon concentration in the water •The equilibrium is given by Weigel’s equation and depends on temperature•The probe has an advantage in that it does not need a pump for the water•It will, however, take more than three hours to make a spot measurement
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Comparison Measurements
Comparison measurements (21/11/09)
Cwater = 7.5 ± 0.9 Bq/L (RADH2O)
Cair = 23000 ± 600 Bq/m3 (Water Probe)
Kw = 0.312 → Cwater = Kw · Cair = 7.2 ± 0.5 Bq/L
(D. Guadagnuolo, PhD Thesis in Physics, 2009)
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Localization of the Bussento river basin
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Bussento River Basin and Policastro Gulf
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Bussento river basin
• The Bussento river drainage basin is one of the major and more complex drainage river systems of the southern sector of Campania region
• This complexity is due to the highly hydro geomorphological conditioning induced by the karst landforms and processes
• It is characterized by widely and deeply karst features, like summit karst highlands with dolines, lowlands with blind valleys, streams disappearings into sinkholes, cave systems, karst-induced groundwater aquifers
• The main stream originates from the upland springs of Mt Cervati (1888 m), one of the highest mountain ridges in Southern Apennines
• Downstream the river flows partly in wide alluvial valleys and partly in steep gorges and rapids, where a number of springs, delivering fresh water from the aquifers into the streambed, increases progressively the river discharge.
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The Middle Bussento Segment, comprising the WWF Oasis reach, is located in the Morigerati gorge, a typical epigenetic valley, along which groundwater inflows from epikarst springs, conduit springs and cave springs, supply a perennial streamflow in a step-and-pool river type.
The Middle-Lower Bussento Segment is located more downstream. It comprises the Sicilì Bridge Reference reach, a plane bed river slightly entrenched in alluvial terrace and bedrock.
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• Identification of the sampling monitoring station (river, spring)
• Collection of the sample and/or measurement in situ
• Measurement of other parameters of interest: river discharge, chemical and physical parameters (pH, dissolved oxygen, temperature…)
• Measurement in laboratory
• Data analysis
• Planning of future campaigns according to the obtained results
Measurement Protocol
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Data Analysis
• The radon activity concentration data have been arranged in relation to the fluvial level hierarchy: at segment scale and at reach scale
• Two main river segment have been analyzed: Middle Bussento and Middle-Lower Bussento
• Two reference reaches have been analyzed: Sicilì Bridge and WWF Oasis
• An analysis of radon activity concentration measured at the springs has brought to the identification of three kinds of karst springs
• An analysis of radon transfer from water to air has been made, applying different models
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Middle Bussento Segment
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Middle-Lower Bussento Segment
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Comparison with the FloodComparison with the Flood
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Seasonal Variation
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WWF Oasis Reference Reach
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Stagnant Film Model• The radon content of river water is strongly affected by volatilization to the atmosphere
• A model used to characterize the transfer of radon to the atmosphere is the stagnant film model
• This model assumes that the rate of exchanges of gases between the water and the atmosphere is controlled by molecular diffusion through a stagnant film, tens of microns thick, at the water-air interface.
•Both the air above and the water below this film are assumed to constitute two well-mixed reservoirs with uniform vertical concentrations separated by the stagnant film of water
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• The thickness of the film is dependent on the degree of agitation of the water surface caused by wind, waves and currents
• The thickness of the stagnant film, z, is estimated by comparing upstream and downstream radon concentrations in a section of the stream where it can be assumed there is no groundwater contribution to the streamflow
Stagnant Film Model
vhCC
Dxz
DSUS )/ln(
• Two reference stations have been chosen to measure CUS and CDS
•From the equation
•Where
•An estimation of z has been obtained
xUSDS eCC
vhzD
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Stagnant Film Model
Sicilì Bridge WWF Oasis
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Gas Exchange Analysisy = K x-δ
A very sudden and sharp decrease can be observed
The best fit curve has turned out to be a Power Law
δ is a coefficient that indicates how quickly radon outgassing happens
•The values are mainly included in the range between 2.5 and 3.5
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Gas Exchange Analysis
avgavgqUSUSDSDS CQtkqCCQCQ
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Modello di Kies-Hofmann et al.
per la valutazione della portata delle acque sorgive profonde
CUSCDS
L vQUS
QDS
Cm
Qm
qCq
mmqUSUSDSDS CtkQqLCCQCQ Grandezze da misurare:
1. CUS CDS Cm Cq Concentrazioni Upstream, Downstream, Media e di Immissione Laterale
2. QUS QDS Qm Portate Upstream, Downstream e Media
3. L Distanza tra le 2 stazioni di misura Upstream e Downstream
4. v Velocità del flusso per ricavare il tempo t
5. q Tasso di immissione laterale per unità di lunghezza
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Karst Springs Analysis
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Karst Springs Analysis
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SGD
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SGD “Vuddu”, Villammare, Policastro, Cilento (> 5mc/s)
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Submarine Groundwater DischargeO’ Vuddu (boiling water), Policastro., Italy
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Courtesy of
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PATHWAYS FOR POLLUTION
• Sinkholes
• Cave Entrances
• Cracks and Crevices
• Filtration through Soil
• Soil Macropores
In karst landscapes, water can enter the aquifer through large openings, thus very little or no filtration occurs.
Why to be concerned about Karst Aquifers?
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PATHWAYS FOR POLLUTION
• Sinkholes
• Cave Entrances
• Cracks and Crevices
• Filtration through Soil
• Soil Macropores
Large openings (caves and crevices) are often continuous for the entire length of the aquifer (from inputs via sinks to exits at springs or wells).
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PATHWAYS FOR POLLUTION
• Sinkholes
• Cave Entrances
• Cracks and Crevices
• Filtration through Soil
• Soil Macropores
Once in the aquifer, water and contaminates can move quickly…
to both known and unpredictable locations!
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Karst groundwater is extremely susceptible to Karst groundwater is extremely susceptible to pollution…pollution…
Urban pollution of groundwater: sewage, pavement runoff containing petrochemicals, trash, domestic and industrial chemicals
Rural pollution of groundwater: sewage, fertilizers, pesticides, herbicides, dead livestock, and trash
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Contaminants associated with agricultural activities, such as nitrates, bacteria from livestock waste, and pesticides, are common in karst groundwater. Also, contaminants associated with urban runoff, such as lead, chromium, oil and grease, and bacteria from pet-animal wastes may be a threat to people using karst water supplies and to aquatic cave life.
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From: USGS (2002) Exploring Caves, Washington, D.C., pp. 61.
Karst landscape: a very complex network for groundwater
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© 2002, Nick Crawford Center for Cave and Karst Studies
Karst aquifers and contamination
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Flooding
Catastrophic collapse:
• regolith (soil) collapse
• bedrock (cave) collapse
Construction problems:
• stabilization of land for buildings and roads Courtesy by J. Alan Glennon
Department of Geography
University of California, Santa Barbara
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Water-supply development
• quantity and quality
Environmental Health Issues
• radon
• acute contaminant exposure
• medical geology
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What can be done about all these problems?
• Study karst environments and apply information to solutions
• Make Informed Choices and Plans (Gather Information)
• Implement plans with an understanding of ongoing processes
• Know typical behavior for karst landscapes; prepare for it – budget for it
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Conclusions
• The implementation of radon measurement techniques has confirmed the perspective of using these methodologies to investigate the interaction between streamflow and groundwater in a river
• Different measurement techniques have been tested and compared
• Experimental data have been acquired during monthly measurement campaigns
• Data have enabled to individuate a spatial and temporal variability of radon activity concentration along the river
• Three typologies of karst springs have been identified
• A flood event has been investigated comparing radon activity concentration during and after the flood
• A preliminary investigation and modeling of radon diffusion from water to air has been made
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SGDCILERAD“Submarine Groundwater Discharge assessment
on the interregional coastal areas of Cilento, southern Italy,
with measurements of natural isotopic tracers like 222-Radon”
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Our Project is funded by:
University of Salerno
Istituto Nazionale di Fisica Nucleare
Regional Water Authority – Autorità di Bacino in Sinistra Sele
National Park of Cilento and Vallo di Diano
CONSAC – Consorzio Acquedotto del Cilento
Provincia di Salerno – Assessorato all’Ambiente
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Possibility of 2 Marie Curie EU FP7
starting from summer 2013.
Researchers who already have a Ph.D. degree
Deadline: August 2012
Contact: prof.Michele Guida
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USE OF RADON-222 AS NATURALLY
OCCURRING TRACER FOR RESIDUAL
NAPL-CONTAMINATION OF AQUIFERS
In collaboration with C.U.G.RI., ENI and Michael Schubert, UFZ LeipzigHelmholtz Centre for Environmental Research – UFZ Leipzig, Germany
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some literature
• 8° International Symposium on the Natural Radiation Environment (NREVIII), Buzios, Rio de Janeiro, Brasile, 07 – 12 Ottobre 2007;
• International Workshop on “Measurement and Application of Radium and Radon Isotopes in Environmental Sciences”, Venezia, 07 – 11 Aprile 2008;
• European Geosciences Union (EGU) General Assembly, Vienna, 13 – 18 Aprile 2008;
• Giornate di studio: “Il rischio da contaminazione radioattiva: i casi radon e uranio impoverito”, Paestum, 29 – 30 Apr. 2008.
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International Collaborations: • Grup de Fisica de les Radiacions, Universitat Autonoma de
Barcelona, Spagna;
• Department of Oceanography, Florida State University, Tallahassee, Florida, USA;
• LARAMG - Laboratory of Radioecology and Global Changes, Universidade do Estado do Rio de Janeiro, Brasile;
• Institut de Protection et de Sŭreté Nucléaire (I.R.S.N.), IRSN - DEI - SARG - LERAR, Francia;
• Helmholtz Centre for Environmental Research – UFZ, Leipzig, Germania;
• Laboratoire de l’environnement marin, Département des sciences et des applications nucléaires, IAEA, Monaco.
• Alexander Makarenko, National Technical University, Kyiv, Ukraine
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C.U.G.RI.____________________________________________________
C.U.G.RI. Centro Universitario per la Previsione e
Prevenzione dei Grandi Rischi University Centre for the Prediction and
Prevention of Large Hazards
Prof. Eugenio Pugliese CarratelliDirector
Barcellona 2009
www.cugri.unisa.it
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Università degli Studi di Napoli “Federico II”
Università degli Studi di Salerno
C.U.G.RI.is a Consortium between the University “Federico II” of Naples and the University of
Salerno.It was established in 1993 by
the Italian National Law
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Goals and operation
CUGRI acts as a front end for the two founding Universities in the fields of the prediction and prevention of large hazards, natural and industrial.
It works – mostly – under contracts from public bodies and private companies, by carrying out applied research, consultancy and field monitoring activities
It also operates with its own funds (Italian Ministry of Research) to perform basic research.
All the staff from the two Universities can operate within CUGRI
But it also operates in association with Private Companies, other Universities, and other Scientific Institutions
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SECTORS____________________________________________________
• Hydrogeology
• Coastal and Marine
• Volcanic
• Earthquake
•Chemical-industrial and environmental
• Radioactivity and Radioprotection
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OWN PROJECTS ____________________________________________________
• Flood Risk • Landslide Risk • Meteo-marine risk • Soil mechanics actions for land protection • Hydraulic infrastructures and risks• Landslide hazards within the specific geology of the Campania
Region• Building vulnerability and structural consolidation techniques• Safety and the environment • Parallel computing in environemental engineering• Assessment of the impact of the Natural Radioactivity on a
regional scale.
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• Institute of Geological Science, Jagellonian University, Krakòw,
Polonia.
• M.I.T. (Massachusetts Institute of Technology - Cambridge,
U.S.A.).
• Hydraulics Research Ltd. Wallingford, Oxfordshire, U.K.
• CUJAE- Technical University of Havana (Cuba)
• :---- see previous slides
International Cooperation
… so far ____________________________________________________
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Regional Autority
Risk Prediction:
• Landslides hazard
• Coastal hazards and Coastal erotion
• Flood hazard
Autorità di Bacino Regionale Destra Sele
Autorità di Bacino Regionale Sarno
Autorità di Bacino Regionale Nord-Occidentale
Autorità di Bacino Regionale Sinistra Sele
HYDRAULICS, SOIL MECHANICS, GEOLOGY
____________________________________________________
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Management of the hydrogeologic emergency in the City of Naples
Technical and scientific support to the analysis of the hydrogeologic hazard and to the definition of a strategy for
hazard mitigation.
HYDRAULICS, SOIL MECHANICS____________________________________________________
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Outline of the Geografic Information System for Liri-Garigliano and
Volturno River Catchments, in the hydraulic and geological hazard
mitigation field
HYDRAULICS, GEOLOGY, SOIL MECHANICS ____________________________________________________
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REGIONE PIEMONTE
Hydrological studies for the hydro-meteorological flood risk assessment
Priola 05 November 1994Pictures from the flooding of Alta Valle Tanaro e surroundings
HYDRAULICS, HYDROLOGY____________________________________________________
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HYDRAULICS____________________________________________________
Dipartimento dei Servizi Tecnici Nazionali
Evaluation of the studies about artificial flood waves produced by
dam gates operation or by dam break events
Breached dam during the Oder flood in 1998. View looking downstream, through the breached dam section.
ITALIAN NATIONAL DAM MONITORING AND REGULATING AUTHORITY
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Provincia Salerno
HYDRAULICS, GEOLOGY, SOIL MECHANICS ____________________________________________________
Scientific support in the development of the Risk
Prevention Plan
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European Project
HYDRAULICS____________________________________________________
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A special thought to a very special friend and colleague Sandro Pietrofaccia that recently left us and whose human and professional virtues will be forever a very important example and
reference
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Having fun with scientific research
Working very hard on the field
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Thanks to all the guys from the RAD_Campania group
• Albina Cuomo (Environmental Engineer)
• Mariella De Piano (Environmental Engineer)
• Davide Guadagnuolo (Experimental Physicist)
• Domenico Guida (Geomorphologist)
• Michela Iamarino (Pedologist)
• Simona Mancini (Civil Engineer)
• Anna Pelosi (Environmental Engineer)
• Lucia Pergamo (Civil Engineer)
• Nicoletta Pisacreta (Civil Engineer)
• Enrico Sicignano (Architect, Building Engineer)
• Vincenzo Siervo (Geologist, GIS expert)
A very special one to the CUGRI staff:
E. Pugliese Carratelli (Scientific Director), G. Benevento (Technical Director),
P. Meloro (Administration Responsible)
Last but not least: nothing would have been possible without the warm and friendly encouragement of
Aldo De Marco, Pasquale Persico, Fabio Rossi
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Macroscopic World Macroscopic World Macroscopic World Macroscopic World
Tens of meters/meters Tens of cm / centimeters
(10-2 m)
millimeters(10-3 m)
Objects from everyday’s life
Measuring tools:
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Microscopic World Microscopic World Microscopic World Microscopic World
10 micrometers(1 m = 10-6 m)
100 nanometers (1 nm = 10-9 m)
cromosomesmicroelectronical
circuits
Cells
Measuring tools:
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Angstrom(1 Å = 10-10 m)
1 10 Fermis (1 F = 10-15 m)
< 10-18 m
Atomic and Subatomic Atomic and Subatomic World World
Atomic and Subatomic Atomic and Subatomic World World
Atom
Nucleus
Proton (1.7 x 10-27 kg)
Neutron
Quark “up”
Quark “down”
Electrons (m= 9 x 10-31 kg, q = - 1.6 x 10-19 C)
measuring tools:
1 F
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Earth
Sun (eclipse)
spiral galaxy
Cluster of galaxies
“Bubbles” of galaxies
107 m
109 m
the Milky Way
Our Galaxy
1020 m
1 light-year = 1016 m= 10000 billions of km
1023 m
1025 m
MacrocosmMacrocosm
measuring tools
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1908-1910 - Esperiments by GEIGER, MARSDEN and RUTHERFORD:
bombing of thin metallic plates with ; on the average 1 over 20000 was scattered at an angle larger than 90°.
1900 – THOMSON’s Atomic Model:
The atom is a homogeneous (electrically neutral) system, containing electrons uniformly distributed in it, whose charge is balanced by some point-like positive charges (“plumcake” model).
Rutherford’s Atomic Model: atom is a sort of a small solar system. 1919 – Rutherford assumed that inside the nucleus
there were positively charged particles: protons.
Thomson’s Atom Thomson’s Atom
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Why High Energies are needed?
Why High Energies are needed?
how can we “see” the objects in the microcosm?
We use high energy particles as projectiles to illumininate the target and use particle detectors e as “our eyes”.
how can we see the ordinary objects?
We use visible light as a source of projectiles (photons) to illuminate objects and our eyes as detectors to see them.
Heisenberg uncertainty relation p x = h
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Particle Accelerators Particle Accelerators
1933 – Ernest LAWRENCE realized the first cyclotron in the USA. In 1939 he made
another one with a diameter of 1.5 m.
1960 – Bruno TOUSCHEK conceived the first circular collider: AdA (Anello di Annichilazione = Accumulation Ring) at the italian INFN laboratories (INFN = Istituto Nazionale di Fisica Nucleare, National Institute of Nuclear Physics)in Frascati, in the neighborhood of Rome, Italy.
e+ e-
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1) Produce beams of accelerated particlesparticle accelerators
The approach
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The approach
2) Make the particles from the two oppisite beams colliding one against each other. – Production of “events” with creation of new”
particles
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The approach
3) “measure” the particles produced and store all the experimental informations
» particle detectors
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The approach
4) Analyze all the informations collected
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Why do we need particle accelerators so large?
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LHC
ALICE
LHC: circular ring long 27 km• Circular accelerators: to make every particle in a
beam passing more times through the accelerating elements.
• But at high energies sychrotron radiation occurs. • A charged particle moving along a cirdular trajectory
looses energy by emitting photons. emitted energy
constant
particle energy
orbit radius • Increasing the radius of the accelerator the loss of energy, by radiation, diminishes.
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Why do we need High Energies?
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To produce “new” particles
• To be able to produce and investigate in the terrestrial labs particles with bigger and bigger masses
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Per sondarne la struttura
• To investigate the structure of matter at scales smaller and smaller.
To each particle is associated a wave, with a wavelength (which is small if the energy is is high)
with the increasing of the energy (diminishing of the wavelength) smaller details can be resolved and be “seen”.
low energy high energy
sonda
target
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New forms of matter produced in high energy collisions
E = Mc2
(c = velocity of light in the vacuum = 300.000 km/s)
A spoon filled with water contains a quantity of matter equivalent to the amount of energy needed to power an apartment for 5 kyears.
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The Standard Model The Standard Model The Standard Model The Standard Model 1967 – S. WEINBERG, A. SALAM, S. GLASHOW:
Unified theory of the electromagnetic and the nuclear weak interactions into the ELECTROWEAK INTERACTION.
3 families of Fundamental Particles,
grouped in doublets
u
d
c
s
t
b
e
e
electric charge
+2/3
-1/3
0
-1
quarks (q)
leptons
increasing mass
I II III
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- 1
0
5.1 x 10-4
< 2 x 10-8 Electron Neutrino
e Electron
e
LEPTONSLEPTONS
NameName Mass(GeV/c2)
Mass(GeV/c2) ChargeCharge
- 1
0
0.106
< 3 x 10-4Muon Neutrino
Muon
- 1
0
1.784
4 x 10-2Tau Neutrino
Tau
QUARKSQUARKS
NameName Mass(GeV/c2)
Mass(GeV/c2) ChargeCharge
+ 2/3
- 1/3
4 x 10-3
7 x 10-3
Up
Down
u
d
+ 2/3
- 1/3
1.5
0.15Strange
c Charm
s
+ 2/3
- 1/3
175
4 .7 Bottom
t Top
b
F A M I L Y
I
II
III
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Relative strength Relative strength
202011
10 -3810 -38
10 -710 -7
Strong interaction responsible for the build-up of the nucleus
EM inteaction responsible for the stability of the atom
Weak interaction responsible of radioactive decays
Gravitational interaction responsible of the stability of the solar system
The 4 fundamental interactions The 4 fundamental interactions The 4 fundamental interactions The 4 fundamental interactions
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Particle Interaction mediated by the exchange of other particles? A pictorial view ...
The exchange of the ball « generates » a repulsive force
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Interactions Messengers (interaction quanta)
INTERMEDIATING BOSONS INTERMEDIATING BOSONS
NameName Mass(GeV/c2)
Mass(GeV/c2) ChargeCharge
0
0
0
91.19 Z
Photon
Z
+ 180.6W+
00 Gluong
- 180.6W-
W +
W -
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p p X Z°
e + e _
p p
electron
positron
1983 – At CERN (European Center for Particle Physics) di Ginevra, Carlo RUBBIA and the international collaboration (UA1) discover the messengers W+, W- and Z° of the electroweak interaction
Carlo Rubbia and Simon van der Meer
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p p
Energy+0Center of mass energy =
2m•Energy
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p p
Energy+Energy c.m. Energy = 2•Energy
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DESY e-p(300 Gev)
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LEP/ LHC
SPS
CERN
GINEVRA
LEP/ LHC
SPS
CERNGENEVA
LEP : Large Electron Positron collider (1989-2000)LHC: Large Hadron Collider (2007-2020)
27 k
m
CERN European Center for Particle Physics European Center for Particle Physics CERN European Center for Particle Physics European Center for Particle Physics
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CERN LEP e+-e- (200 Gev)
LHC- 2007 pp (16000 Gev)
27 Km
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Large Hadron Collider (LHC)
• Coolest locations in the solar system – Superconducting magnets – -270.45 oC
(absolute zero: -273.15 oC)
• 27 km long
• Around 100 m below the ground
• protons accelerated up to 99.9999991 % of the light speed
• > 10 000 orbits/s
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gas
+-
+ + + + + +
Enable to determine particle trajectory and if used with a magnetic field measurement of its momentum is
enabled too.
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gas
NB: the particle is NB: the particle is not destroyed !!!not destroyed !!!
Space resolution 0,05 0,1 mm
In campomagnetico
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Fe/Pb ...
NB: the particle is destroyed !!
Fotomultiplier (PM)
scintillatorEnergy transformed
into fluorescence light
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Tracciatore Muoni
The typical structure of a detector on colliders
Fascio
Calorimetro
Tracciatore
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Particle Jet
Electron after collision
Electron (30 GeV) Proton(820 GeV)
Calorimeter
Tracker
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neutrino
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LHC ExperimentsLHC Experiments
ATLAS
CMS
Designed for high pT physics in p-p
collisions
ALICE
Dedicated LHC Heavy Ion experiment
Diameter ~ 9 km
CERN
LHC
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ALICE ALICE CollaborationCollaboration
~ 1000 Members
(63% from CERN MS)
~30 Countries
~100 Institutes
~ 150 MCHF capital
cost
(+ ‘free’
magnet)
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Heavy Ion CollisionHeavy Ion Collision
t = - 3 fm/ct = 0
hard collisions
t = 1 fm/c
pre-equilibrium
t = 5 fm/c
QGP
t = 10 fm/c
hadron gas
t = 40 fm/c
freeze-out
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ALICE Set-upALICE Set-up
HMPID
Muon Arm
TRD
PHOS
PMD
ITS
TOF
TPC
Size: ~ 16 x 26 m2
Weight: ~10,000 tons
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QM2011 J. Schukraft
306
ALICE@LHC ALICE@LHC AA LLarge IIon CCollider EExperimentALICE@LHC ALICE@LHC AA LLarge IIon CCollider EExperiment
• ALICE Experiment
• Pb-Pb Results
Spectra & Particle Ratios
Flow & Correlations & Fluctuations
RAA of inclusive particles
Heavy open Flavour
J/
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1 TOF sectors is divided in 5 modules: 2 external (19 strips), 2 intermediate (19 strips), 1 central (15 strips)91 strips/SuperModule157248 padstotal sensitive area: ~150 m2
2 crates /side
Detector layoutDetector layout
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MOUNTING MODULES ON THE ASSEMBLY BENCH
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SMs installed in the pitSMs installed in the pit
waiting for next installation window
0
17
17
8
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SMs installed in the pitSMs installed in the pit
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TOF SM: services, readout crates and cover as in real life
Services
TOF SMcover
Readout crates
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TOF SM: cooling support
8 ‘traversi’ (Al)
2 ‘longheroni’ (Al)
real simulation
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TOF digits: Pb-Pb event
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TOF raw data: Pb-Pb event
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TOF clusters: Pb-Pb event
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TOF raw data:cosmic ray run14493_236 (1)
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TOF raw data:cosmic ray run14493_236 (2)
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TOF raw data:cosmic ray run14493_236 (3)
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April 2011J. Schukraft
322
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CDS – NA 4 Luglio 2011 Gruppo Collegato di Salerno
ALICE StatusALICE Detector Status
Complete since 2008:ITS, TPC TOF, HMPID, FMD,T0, ZDC, PMD, ACORDE,MuonArm, DAQ
Installation 2010:4/10 EMCAL7/18 TRD3/5 PHOS~60% HLT
Installation 2011:10/10 EMCAL10/18 TRD (to be completed end 2011)
HMPID
EMCAL
PHOS
ITS
TPC
TRD
TOF
L3 Magnet
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Open problems in Particle Physics
Open problems in Particle Physics
Basic questions
Mass origin (does it exist the Higgs particle? What is her mass and which are her properties? Do we have different kinds of her? etc.);
Structure and hierarchy of the elementary constituents ( are quarks and leptons the basic “bricks” of Matter? Are they elementary or complex or made of other more elementary elements ? strings , superstrings ? );
Electrical Charge Quantization (origin of quantization, problem of non-integer electrical charges (why they are not observable?), etc.)
Space-time quantization ?
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BABARCMS
KLOE
AUGER
VIRGO
OPERAICARUS WARP
ARGO
T2K-RD
ERNA
ATLAS
LUNA
GAMMA
PRISMA
ISOSPINNUCL-EX
EDEN-FIESTA
EXOTIC
SUBNUCLEAR ASTROPARTICLE NUCLEAR PHYSICS
JYFL
RIKEN
GSI
LNS
GANIL
ANL
LNGS
DTL
BENE, HARP
CERN
JPARK
RICERCHE INTERDISCIPLINARI
• Acceleratori, Rivelatori, Analisi di immagini per applicazioni medicali • Tecniche nucleari per i beni culturali• GRID Computing
Observ. SudMalargue
YANGBAJING
SLAC
LISA
LNL
CascinaTn
LNF
WIZARDPAMELA
Polar Orbit Satellite
Raggi cosmici di alta energiaLampi di raggi gammaMateria oscuraAntimateriaDecadimento del protoneFisica del neutrinoOnde gravitazionali
Ricerca di HiggsSupersimmetriaProcessi di QCD Matrice CKM Oltre il Modello Standard Violazione di CP nei decadimenti di B, K
INFNINFNSezione di NapoliSezione di Napoli
Reazioni di Fusione – Fissione - Astrofisica nucleareNuclei esotici – Eccitazioni di risonanze – Reazioni di rottura - Nuclei ricchi di neutroni – Reazioni nucleari indotte da ioni pesanti - Multiframmentazione – Transizioni di fase nella materia nucleare – Ruolo dell’isospin nelle reazioni nucleari
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Having fun with scientific research
… and working very hard on the field!!!!
Thank you so much for your Thank you so much for your patience and good luck for your patience and good luck for your life!! life!!