desalination option in the tunisia nuclear power project · desalination option in the tunisia...
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Desalination option in the TunisiaNuclear Power Project
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Jilani SAADOUNI
16th INPRO Dialogue Forum on Opportunities and Issues in Non-Electric Applications of Nuclear Energy,
12-14 December 2018
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Contents
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3
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Overview of the Tunisia NPP Project
Water desalination- 1GWe PWR
Water desalination- SMR
1 Water resources in Tunisia
5 Socio-economic impact
6 Conclusion
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Water resources in Tunisia
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Metrological condition
Tunisia is characterized by tow different
climates
- Mediterranean in the north (500mm /year)
- Saharan in the south (100mm/year)
Spatio-temporal variability of water
resources
90 billion M3 (1969-1970)
11 billion M3 dry year
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Water resources in Tunisia
• The water potential in Tunisia is: 4840 Mm3
(Surface water: 2700 Mm3 - Groundwater: 2140 Mm3)
• The mobilized resources are: 4640 Mm3 (92% of the available quantity)
• the available volume per person and per year is :
450 m3 against a minimum of 1000 m3 considered by the United Nation
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Sea Water Desalination in Tunisia
• The capacity production of desalinated water in Tunisia is
175,000 m3/ Day.
• This capacity should be increased , to 500,000 m³/d by 2030
• There is a need for the development of water desalination and nuclear energy can be a solution to deal with this problem
• The desalination option is conceded in the Tunisian NPP project.
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Tunisia NPP Project
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Reasons to consider nuclear power
Negative balance in national gas resources Diversification of supply’s sources (2011)
Natural Gaz98,55%
Fuel, Gas oil0,08%
Hydro0,45%
Wind energy0,92%
A high sensitivity to fuel prices
The Tunisian government decided to conduct a feasibility study to introduce a first nuclear Plant on 3rd November 2006.The
Tunisian Company of Electricity and Gas (STEG) has in charge of leading the pre- feasibility studies.
Advantages of nuclear power
• Competitive Price of KWh• No emission of greenhouse gas• The total price of a KWh is less sensitive to the nuclear fuel price
fluctuations
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Tunisia NPP Project
Daily Load curve
(Summer )
4 seasons
Peak in summer
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Series1
0
1 000
2 000
3 000
4 000
2009 2010 2011 2012 2013 2014 2015
2 6603 010 3 024 3 353 3 144
3465 3599
pu
issa
nce
de
po
inte
en
MW
Peak load evolution (MW)
Average annual growth rate : 5%
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Tunisia NPP Project
• At the beginning we have
considered 18 sites. After
taking into account some
criteria we kept only 2
candidate sites.
Italy
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Technology Reactors pre-selection process
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•Achievement of the FS draft report
• Ongoing Self evaluation
• Preparation of the INIR mission 2019
FS Status
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Water desalination methods
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Desalination methods
A method to obtain fresh water byfiltering seawater under pressure using asemi-permeable membrane through
which seawater cannot pass.
A method to obtain fresh water bycondensation of vapor made byevaporation of seawater.
A method to obtain fresh waterusing a special membrane that canseparate seawater into diluate andconcentrate, and then extractfreshwater from the diluate. This isat an experimental research stage.
EvaporationReverse Osmosis Electrodialysis
There are three methods of desalination
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Classification of Desalination technologies
Source : Comparative Analysis of Desalination Technologies. P. G. Youssefa , R.K. AL-Dadaha *, S. M. Mahmouda15
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Comparison of water desalination methods
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Water desalination- 1GWe PWR
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Water desalination- 1GWe PWR
Nuclear reactor provide heat in large range of temperatures which allows easy adaptation with desalination processEnergy requirements in desalination plants can be supplied by coupling nuclear reactors with desalination units (MSF) or (MED)
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Water desalination- 1GWe PWR
The NPP 1GWe will be suitable for desalination, with cogeneration
of electricity using:
▪ low-pressure steam from the turbine and
▪ hot seawater feed from the final cooling system.
.
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Water desalination- 1GWe PWR
The main target for
nuclear plant have
been identified as
providing 100.000-
200,000 m3/d.
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Water desalination- 1GWe PWR
Desalination can be a way to control
the amount of electricity supplied to
the grid
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with desalination taking 400 MWt from the
secondary circuit,
120 MWe could be used for grid flexibility
(contribute to the peak load)
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Water desalination- SMR
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Water desalination- SMR
Small Modular Reactors can provide reliable economical power to produce fresh water in remote regions.
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SMR
There is strong interest in small and simpler units for generating electricity from nuclear power, and for process heat.This interest in small and medium nuclear power reactors is driven both by a desire to reduce the impact of capital costs and to provide power away from large grid systems.The technologies involved are numerous and very diverse.
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Example of SMR that can be used for desalination
Argentina has identified a site for its small reactor (CAREM), which could be used for
desalination
The Republic of Korea is proceeding with its SMART (System-integrated Modular Advanced Reactor) concept. Work is into the basic design phase. The project is designed to produce 40,000 m3 /d of potable water.
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Example of SMR that can be used for desalination
The high level of modularization of Nuscale make him suitable for
desalination process.
Russia designed a floating nuclear plant with 80-thermal megawatt power which can be suitale fo water
desalination in remote region.
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Example of water desalination using Nuscale modules
Source: SMR2014-3392. INTEGRATION OF NUSCALE SMR WITH DESALINATION TECHNOLOGIES. April 15-17, 2014, Washington, D.C., USA
Relationship between electricity and water output from a single NuScale module coupled to a variety of membrane and thermal distillation desalination processes.
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Tunisian caseKey figures of Sfax:-- Population : 1000000
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Key figures of Djerba:- Governorate : medenine- Population : 163 726
-local features:➢remote region.➢Lacke of fresh water.➢Objective: provide sfax with 100000 m3/d➢provide djerba with 70000 m3/d-General feature :➢Tunisia has a small grid
➢Need of load following.
SMR is suitable for water
desalination in Tunisia
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Socio-economic impact
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Socio-economic impact
• Desalination using Heat from NPP will have a socio-economic impact in the region characterised by lack ofwater as well as regions which currently supply water
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Socio-economic impact
• North west region and centre westregion supply the eastern regionwith water
• desalination could:• avoid migration
• Develop agriculture sector
• Ensure the security of water supplyprovision
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Conclusion
• currently most desalination plants use fossil fuels, (not clean energy source)
• the potential of nuclear energy is enormous. It can generate much more fresh water than what is being currently produced, and also it is more affordable and does not release greenhouse gases.
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Thank you
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