![Page 1: 05-Oct-02 L. Moritz TRIUMF 4004 Wesbrook Mall Vancouver, B.C. V6T2A3 Lutz.moritz@triumf.ca Radiation.Safety@ISAC SAFERIB Workshop CERN, Oct.30-Nov.1, 2002Safety@ISAC](https://reader035.vdocument.in/reader035/viewer/2022081515/56649ef65503460f94c0955a/html5/thumbnails/1.jpg)
05-Oct-02
L. MoritzTRIUMF
4004 Wesbrook Mall Vancouver, B.C.
Radiation.Safety@ISAC
SAFERIB WorkshopCERN, Oct.30-Nov.1, 2002
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05-Oct-02
Overview
Short description of ISAC Shielding (tools and verification) Activation (yields and distribution) Target handling Contamination control Experience and plans for future
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05-Oct-02
ISAC Parameters
Reference Design:
100 A of 500 MeV protons on
95 g cm-2 UC2
Reference Design:
100 A of 500 MeV protons on
95 g cm-2 UC2
Authorization:
100 A of 500 MeV protons on targets
Z 82
Authorization:
100 A of 500 MeV protons on targets
Z 82
Application for targets with Z > 82
in preparation
Application for targets with Z > 82
in preparationOttawa
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05-Oct-02
Targets (to September 2002)Target t (g cm -2) Max. Ip (A) Ipdt (Ah)
CaO 36.0 <10 70
CaO 31.1 <10 363
Nb 11.1 10 3242
Nb 11.5 20 9063
Mo 89.2 100 197
Ta 21.3 20 3516
CaZrO3 42.3 2 1357
SiC 7.4 10 2155
Nb 22.0 40 3766
Ta 43.6 40 17279
SiC 29.9 15 16010
SiC 18.9 30
TiC 37.1 40
Test only
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05-Oct-02
ISAC at TRIUMF
http://www.triumf.ca/isac/is9-00-t.jpg
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05-Oct-02
ISAC Experimental Hall
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05-Oct-02
ISAC-II (2005)
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05-Oct-02
ISAC Target Stations
500 MeV Protons
RIBInitial Installation:
West Target StationInitial Installation:
West Target StationInstallation 2002:
East Target Station
Installation 2002: East Target
Station
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05-Oct-02
Shielding
Bulk Shielding: Point source, line-of- sight attenuation
Complicated geometries: FLUKA Verification: MCNP, LCS
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05-Oct-02
Point Source, Line-of-sight Attenuation of Prompt Radiation Field
2
00 /)/exp()exp()()/,,( rdE
EhEfdEH
m
ppnp
Nuclear interaction probability
Nuclear interaction probability
High-energy neutron yield
High-energy neutron yield
Angular dependence
Angular dependence
Exponential Attenuation
Exponential Attenuation
Geometry factor
Geometry factor
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05-Oct-02
Parameters fn(Ep), h0, ,
0.00
0.50
1.00
1.50
2.00
0 500 1000
Incident proton energy (MeV)
800
900
1000
1100
1200
0 500 1000
Incident proton energy (MeV)
0
1
2
3
4
5
6
0 500 1000
Incident proton energy (MeV)
Al
Cu
Pb
0
0.25
0.5
0.75
1
0 500 1000Incident proton energy (MeV)
Be
C
Al
Fe
Cu
Pb
Nuclear interaction probability, fn
Nuclear interaction probability, fn
Angular dependence,
Angular dependence,
Attenuationlength,
Attenuationlength,
Source term, h0
Source term, h0
m=0.8m=0.8
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05-Oct-02
Beam line 2A test (graphite target)
1.0E-08
1.0E-07
1.0E-06
1.0E-05
-10 -5 0 5 10
Horizontal distance (m)
Do
se e
qu
ival
en
t (p
Sv
pe
r p
roto
n)
Formula
Snoopy
FLUKA
Test: 500 MeV Proton Beam Stop
1.8 m1.8 m2.9 m2.9 m
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05-Oct-02
ISAC Target Shielding (Plan)
Steel
Concrete(low Na) Radioactive Ion beam
SlitsCu Beam dumpTarget
Proton beam
Concrete
A A’
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05-Oct-02
ISAC Target/ion Source Shielding
ion beam
steel steel steel
0 1m
concrete
concrete & steel
Service space
recycled steel
target
vacuum seals
(Section AA’)
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05-Oct-02
Streaming Through Pre-
separator Maze
Target: 50 g cm-2 UC2
Ep = 500 MeVIp = 100 A
FLUKA simulation
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05-Oct-02
Pre-separator Maze
Added shielding
Before
After
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05-Oct-02
ISAC Target Module
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05-Oct-02
Target Module Service Ducts
Target/Ion Source
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05-Oct-02
Sv/h
Streaming Through Target
Vacuum Exhaust Ducts
Target: 50 g cm-2 UC2
Ep = 500 MeVIp = 100 A
p
Air
Concrete-
steel
steel
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05-Oct-02
Streaming Through Ducts
Concrete-
steel
Air
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05-Oct-02
Composition of Top Shield
1E-06
1E-05
1E-04
1E-03
1E-02
1E-01
0 50 100 150
Shield thickness (cm)
Ave
rag
e d
ose
rat
e (S
v/h
)
Concrete
50/ 50steel/ concrete
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05-Oct-02
Radiation Fields above Target
350 400 200 105
140 170 200 115
Sv/h
1
10
100
1000
Andersson-Braun Measurement100 A on Mo Target Test
Andersson-Braun Measurement100 A on Mo Target Test
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05-Oct-02
Activation
Experimental Cross-sections Silberberg & Tsao FLUKA, LAHET, MCNPX ORIGEN
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05-Oct-02
238U(p,x) Cross Section Comparison at 500 MeV
LCS FLUKA ExperimentalSilberberg & Tsao …………
Fission Spallation Peripheral
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05-Oct-02
Silberberg & Tsao (YIELDX)
1E-02
1E-01
1E+00
1E+01
1E+02
1E+03
0 50 100 150 200 250
Atomic Mass (A)
Cro
ss
se
cti
on
su
mm
ed
ov
er
Z (
mb
)
Pb Pt
Ta La
Te Sn
Nb Zn
V Ti
Ca Si
Mg
500 MeV Protons
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05-Oct-02
FLUKA Simulation (500 MeV protons on UC2 target)
18 cm
1.4 cm
UC2 (5.076 g cm-3)
67 mm
UC2 (5.076 g cm-3)
Ta
H2O
27 mmp
p
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05-Oct-02
Yields: UC2 target (FLUKA simulation)18 cm
1.4 cm
UC2 (5.076 g cm-3)500 MeV p
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05-Oct-02
ORIGEN (build-up and decay)
1.0E+07
1.0E+08
1.0E+09
1.0E+10
1.0E+11
1.0E+12
1.0E+13
1.0E+14
0 500 1000 1500 2000
Time (hours)
Ac
tiv
ity
(Bq
)
u237 pa233 th227
tl207 bi211 rn219
po215 pb211 ra223
po214 rn218 ra222
th226 at217 bi213
pb209 fr221 pa234m
th234 ac225 po213
np239 u230 po216
rn220 u231 bi212
ra224 pb212 po212
th228 tl208 pa234
np235 ra225 pa232
ac228 tl209 np238
u232
Beam On Beam Off
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05-Oct-02
Decays Leading to 210Po
Pu Np
U Pa
Th Ac
Ra Fr
Rn At
Po Bi
Pb Tl
10-7 10-6 10-5 10-4 10-3 10-2 10-1 Atoms p-1
10-8
210Po
Long-livedNot in ORIGEN Library
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05-Oct-02
ISAC Target Handling
Target Maintenance Hall
![Page 31: 05-Oct-02 L. Moritz TRIUMF 4004 Wesbrook Mall Vancouver, B.C. V6T2A3 Lutz.moritz@triumf.ca Radiation.Safety@ISAC SAFERIB Workshop CERN, Oct.30-Nov.1, 2002Safety@ISAC](https://reader035.vdocument.in/reader035/viewer/2022081515/56649ef65503460f94c0955a/html5/thumbnails/31.jpg)
05-Oct-02
Maximum -field Outside ITMH
~10 Sv/h@ 1 m
1 Sv/h
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05-Oct-02
ISAC Target Servicing:
Hot
Cells
Target storage pit
Hot Cells
Target storage pit
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05-Oct-02
ISAC target hot cell roof
docking mechanism
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05-Oct-02
ISAC target being
docked in hot cell
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05-Oct-02
ISAC Hot Cells Before Installation of Windows
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05-Oct-02
View Through ISAC Hot Cell Window
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05-Oct-02
Contamination Control
Ventilation System Production of Radioactivity in Air Typical Release Rates Production of Volatile Radioactivity Vacuum Exhaust Handling
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05-Oct-02
Ventilation System
Hot CellServiceRoom
Hot CellTargetServiceSpace
Presep.Cave
MassSeparatorRoom
ExperimentalHallServices
Target Maintenance Hall
Fan Standby Fan
Secondary Filters
Primary Filters
Air pressure depressionrelative to outside
Stack
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05-Oct-02
Radioactivity Production
in Air
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05-Oct-02
Production in Pre-separator Vault
NuclideProduction rate Release rate
(s-1) (Bq a-1) (%DRL)
3H 7.8x106 1.5x105 1.2x10-10
7Be 7.4x105 1.2x106 1.0x10-7
11C 1.5x106 8.6x109 9.5x10-5
13N 5.8x106 6.9x1010 6.3x10-4
15O 2.3x106 1.0x1011 1.7x10-3
41Ar 1.9x106 2.1x109 2.8x10-5
Total 1.8x1011 2.4x10-3
(3000 hours per year, 100A on 238UC2 target)
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05-Oct-02
Production in Target Service Space
(3000 hours per year, 100 A on 238UC2 target)
NuclideProduction rate Release rate
(s-1) (Bq a-1) (%DRL)
3H 9.5x104 1.8x103 1.4x10-12
7Be 2.2x104 3.6x104 3.0x10-9
11C 4.6x104 2.7x108 3.0x10-6
13N 1.1x105 1.3x109 1.2x10-5
15O 4.8x104 2.4x109 1.6x10-5
41Ar 3.6x106 4.1x109 5.5x10-5
Total 8.1x109 1.1x10-4
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05-Oct-02
Releases to Atmosphere (Gaseous, 2001)
Isotope Total Release (MBq) DRL (MBq) % of DRL127Xe 3.4100 3.7 1010 8.8 10-9
41Ar+ + 5.0 10-3
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05-Oct-02
1E-02
1E-01
1E+00
1E+01
1E+02
1E+03
0 50 100 150 200 250
Atomic Mass (A)
Cro
ss s
ecti
on s
umm
ed o
ver
Z (
mb) Pb
Pt
Ta
La
Te
Sn
Nb
Zn
V
Ti
Ca
Si
Mg
Production of VolatilesTarget
HgI/XeRb/KrCl/ArNe+
volatiles
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05-Oct-02
Vacuum Exhaust System
HEPA filter
Charcoal filter
Operating storage
Long-term
storage
Pre-separator
Mass-separator
TIS
Exit module
s
TP
TP
TP
TP
TP
TP
TPMP
MP
MP
Secondary
PrimarySlits
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05-Oct-02
Releases to Atmosphere (Particulates, 2001)
Isotope Total Release (MBq) DRL (MBq) % of DRL77Br 1.3103 3.4 109 3.8 10-5
75Se 2.7100 2.9 107 9.3 10-6
54Mn 4.310-1 1.3 107 3.3 10-6
126I 2.710-1 1.1 107 2.4 10-6
137Cs 4.710-1 2.7 107 1.7 10-6
82Sr 1.7100 1.1 108 1.5 10-6
82Br 4.5100 6.0 108 7.5 10-7
124I 2.310-1 3.7 107 6.3 10-7
57Co 2.310-1 1.0 108 2.3 10-7
95Nb 2.7100 1.2 108 2.2 10-6
123I 1.4103 5.7 109 2.4 10-5
Total 2.5 103 8.5 10-5
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05-Oct-02
Experience
Contamination Issues Collective Dose
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05-Oct-02
One (!) Contamination Incident(June 2000)
Target Station Hot Cell
Nb target
Ta target
Nuclide Bq cm-2
83Rb 0.1675Se 0.0485Sr 0.42169Yb 0.03
Total 0.66
1
2
No contamination after step 1
Uniform contamination after step 1
No other significant contamination since June 2000
No other significant contamination since June 2000
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05-Oct-02
TRIUMF Collective Dose
0
200
400
600
800
1000
1200
Year
Total Power (kWx20) Collective dose (mSv)
So far ISAC has had no
significant impact on TRIUMF
collective dose
So far ISAC has had no
significant impact on TRIUMF
collective dose
Start of ISAC operation
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05-Oct-02
Future Plans
Task Force to pursue licensing for actinide targets
Proposed test station to measure yields and transport properties of alpha-emitters
Proposed second proton beam line to feed second target station
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05-Oct-02
Conceptual Design of Proposed Test Station
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05-Oct-02