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THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
PRESENTATION OF NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
Via Pietro Nenni, 15 - 27058 – VOGHERA – ITALYTel. +39 0383 3371 – Fax +39 0383 369052
E-mail: [email protected]
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
0. MAIN CONDENSATE TREATMENT1. REACTOR WATER CLEAN-UP2. FUEL POOL CLEAN-UP3. LOW AND MEDIUM ACTIVITY WATER TREATMENT4. OFF-GAS TREATMENT
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
0. MAIN CONDENSATE TREATMENT
Refere to presentation IDRECO
“CONDENSATE TREATMENT”
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS :CONDENSATE POLISHING
PROCESSES
TYPICAL FLOW DIAGRAMSTYPICAL FLOW DIAGRAMSPRECOATSYSTEM
ONLY PRECOAT FILTER
FROM CONDENSATEEXTRACTION PUMPS
CLEAN CONDENSATE PRODUCTTO PREHEATER
PRECOATFILTER
DECOREX®TYPE
CHECKFILTER
FROM CONDENSATEEXTRACTION PUMPS
CLEAN CONDENSATE PRODUCTTO PREHEATERMIXED
BED
ONLY MIXED BED
REGENERATIONSYSTEM
FROM CONDENSATEEXTRACTION PUMPS
CLEAN CONDENSATE
PRODUCTTO PREHEATERMIXED
BED
PRECOAT FILTER & MIXED BED
PRECOATFILTER
DECOREX®TYPE
REGENERATIONSYSTEM
PRECOATSYSTEM
REGENERATIONSYSTEM
FROM CONDENSATEEXTRACTION PUMPS
CLEAN CONDENSATE
PRODUCTTO PREHEATERMIXED
BED
CATIONIC UNIT & MIXED BED
CATIONICUNIT
REGENERATIONSYSTEM
CHECKFILTER
CHECKFILTER
RESIN TRAP
CHECKFILTER
RESINTRAP
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
0. MAIN CONDENSATE TREATMENT1. REACTOR WATER CLEAN-UP2. FUEL POOL CLEAN-UP3. LOW AND MEDIUM ACTIVITY WATER TREATMENT4. OFF-GAS TREATMENT
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
1. REACTOR WATER CLEAN-UP
Reactor water consists on the following:
- in BWR (Boiling Water Reactors) the hot water in contact with
fuel elements
- in PWR (Pressurized Water Reactors) the intermediate fluid
coming from the reactor and going to the steam generator
(secondary circuit)
Even if the operating and design condition are different, the two
technology of reactor water clean-up are similar.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
1. REACTOR WATER CLEAN-UP
The reactor water clean-up, treating a radioactive liquid, consists on:
A) precoat filters
B) mixed beds without regeneration
C) both systems
The choice of the treating system depends from the type of reactors
and the power plant designer.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
1. REACTOR WATER CLEAN-UPA) Precoat Filter
This technology is the same as the one presented above in the main
condensate treatment section.
The filtering elements used for this application are always metal type,
in order to extend the element life.
The powdered resins used are in active form and very pure
(nuclear grade), avoiding the presence of residual compounds of
fabrication that could contaminate the effluent.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
PRECOATSYSTEM
FROM REACTOR COOLING WATER SYSTEM
RETURN TO HEATING SYSTEM
BEFORE REACTORPRECOATFILTER
DECOREX®TYPE
CHECKFILTER
ONLY PRECOAT FILTER
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
1. REACTOR WATER CLEAN-UPB) Mixed Beds Without Regeneration
This technology consists on ion exchange units containing strong
cationic and strong anionic resin mixed together in active form.
When exhausted, the resin is discharged and replaced with a new
charge.
The bead resins used are in active form and very pure (nuclear grade).
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
1. REACTOR WATER CLEAN-UPB) Mixed Beds Without Regeneration
Exhausted Resin TreatmentExhausted Resin Treatment
Exhausted bead resins are discharged from filter units to a Exhausted bead resins are discharged from filter units to a
phase separator using AIR and DEMI WATER.phase separator using AIR and DEMI WATER.
In the phase separator: a settling of solid will take place and In the phase separator: a settling of solid will take place and the two the two
phases are divided and sent to the final destination:phases are divided and sent to the final destination:
-- the liquid will reach the light the liquid will reach the light radwasteradwaste tank (Medium Activity Water) tank (Medium Activity Water)
-- the solid will go to the solid the solid will go to the solid radwasteradwaste treatmenttreatment
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
ONLY MIXED BED (UNREGENERABLE)
MIXEDBED
CHECKFILTER
FROM REACTOR COOLING WATER SYSTEM
RETURN TO HEATING SYSTEM
BEFORE REACTOR
TO EXHAUSTEDRESINS PHASESEPARATOR
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
1. REACTOR WATER CLEAN-UP
C) Precoat Filters + Mixed Bed
In this case, due to the presence of mixed bed as second treatmeIn this case, due to the presence of mixed bed as second treatment, nt,
the the precoatprecoat filters can use inert material instead of powdered resin.filters can use inert material instead of powdered resin.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
PRECOAT FILTER & MIXED BED (UNREGENERABLE)
MIXEDBED
PRECOATFILTER
DECOREX®TYPE
PRECOATSYSTEM
CHECKFILTER
CHECKFILTER
FROM REACTOR COOLING WATER SYSTEM
RETURN TO HEATING SYSTEM
BEFORE REACTOR
TO EXHAUSTEDRESINS PHASESEPARATOR
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
0. MAIN CONDENSATE TREATMENT1. REACTOR WATER CLEAN-UP2. FUEL POOL CLEAN-UP3. LOW AND MEDIUM ACTIVITY WATER TREATMENT4. OFF-GAS TREATMENT
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
2. FUEL POOL WATER CLEAN-UP
The spent fuel elements are normally stored in a pool filled witThe spent fuel elements are normally stored in a pool filled with h
demineralizeddemineralized water, that after needs to be decontaminated. water, that after needs to be decontaminated.
Decontamination means cleaning from soluble salts and also from Decontamination means cleaning from soluble salts and also from the the
suspended solid matter coming from the ambient. suspended solid matter coming from the ambient.
This purpose is reached by means of This purpose is reached by means of precoatprecoat filtration using powdered filtration using powdered
resins nuclear grade. The filtering elements used for this appliresins nuclear grade. The filtering elements used for this application are cation are
always metal type, in order to extend the element life. always metal type, in order to extend the element life.
After cleaning, water is recycled in the fuel pool.After cleaning, water is recycled in the fuel pool.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
2. FUEL POOL WATER CLEAN-UP
This treatment can be continuous or discontinuous, depending on This treatment can be continuous or discontinuous, depending on the the
pool water characteristics. pool water characteristics.
Rarely this treatment is performed by means of Rarely this treatment is performed by means of mixed bed without mixed bed without regenerationregeneration, as in the reactor water clean, as in the reactor water clean--up application above up application above
described.described.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
PRECOATSYSTEM
FROM FUEL POOL BASINRETURN TO
FUEL POOL BASINPRECOATFILTER
DECOREX®TYPE
CHECKFILTER
ONLY PRECOAT FILTER
ONLY MIXED BED (UNREGENERABLE)
MIXEDBED
CHECKFILTERTO EXHAUSTED
RESINS PHASESEPARATOR
FROM FUEL POOL BASINRETURN TO
FUEL POOL BASIN
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
0. MAIN CONDENSATE TREATMENT1. REACTOR WATER CLEAN-UP2. FUEL POOL CLEAN-UP3. LOW AND MEDIUM ACTIVITY WATER TREATMENT4. OFF-GAS TREATMENT
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
3. LOW AND MEDIUM ACTIVITY WATER TREATMENT
LOW ACTIVITY WATER: comes from phase separator of exhausted
precoat waste and from the resin final washing in main condensate
mixed bed
MEDIUM ACTIVITY WATER: comes from phase separator of
exhausted bead resins and from the floor drain cleaning activity.
Sometimes comprises some water coming from laundry and from
laboratories
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
3. LOW AND MEDIUM ACTIVITY WATER TREATMENT
Low activity water
Are usually treated with precoat filters plus mixed bed as previously
described. The treated water is recycled as demi water make-up.
The exhausted resins are conveyed to the relevant phase separator
and the liquid phase comes back to low activity water tank while the
resin are fed to the solid radwaste system.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
A) LOW ACTIVITY WATER
MIXEDBED
PRECOATFILTER
DECOREX®TYPE
PRECOATSYSTEM
CHECKFILTER
CHECKFILTER
FROM LOW ACTIVITY TANK
RETURN TO MAKE UP
WATER
TO EXHAUSTEDRESINS PHASESEPARATOR
OR RECYCLE TO LOW ACTIVITY
TANK
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
3. LOW AND MEDIUM ACTIVITY WATER TREATMENT
Medium Activity Water
Are usually treated with precoat filters and after testing recycled to
the low activity water.
The exhausted precoat is treated as above described.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
B) MEDIUM ACTIVITY WATER
PRECOATSYSTEM
FROM MEDIUM ACTIVITY TANKRECYCLE TO LOW ACTIVITY WATER
CHECKFILTER
OR RECYCLED TO MEDIUM ACTIVITY TANK
PRECOATFILTER
DECOREX®TYPE
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
0. MAIN CONDENSATE TREATMENT1. REACTOR WATER CLEAN-UP2. FUEL POOL CLEAN-UP3. LOW AND MEDIUM ACTIVITY WATER TREATMENT4. OFF-GAS TREATMENT
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
4) OFF GAS TREATMENT
OFF GAS is the nuclear plant ambient air, which must be cleaned to
eliminate radioactive content due to contact with fuel during operations.
OFF GAS consists also in:
- free hydrogen- traces of radioactive substances such as:
- rare gas deriving from radioactive atoms scission- radioactive elements
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
4) OFF GAS TREATMENT
Hydrogen elimination
Performed by means of catalytic recombination:
- Catalyst contained in its own reactor consisting of palladium on a
metallic support, generally stainless steel
- Catalyst effectively operates at high temperatures so off gas to be
treated is preheated
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
Step 1) HYDROGEN ELIMINATION
HYDROGENRECOMBINER
CHECKFILTER
FROM EXHAUST FANTO MOLECULAR SIEVE
HYDROGEN RECOMBINATION
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
4) OFF GAS TREATMENT
Radioactive Substances Elimination
1) Rare gas and radioactive elements are eliminated by means of
molecular sieve beds2) Radioactive elements are eliminated by active carbon adsorption
Both molecular sieves and active carbon are included in dedicated
filters supported by filtering plates threatening the media.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
Step 2) RADIOACTIVE SUBSTANCES ELIMINATION
MOLECULAR SIEVE & ACTIVATED CARBON ADSORPTION
PRECOATSYSTEM
FROM HYDROGEN ELIMINATION
MOLECULARSIEVE
CHECKFILTER
CHECKFILTER
TO ATMOSPHERE
ACTIVATED CARBON
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
4) OFF GAS TREATMENT
Off gas treating plants doesn’t traditionally need any important
maintenance service and are characterised by the same nuclear
power plant life.
Seldom they suffer only from catalyst poisoning, solvable simply by
catalyst media substitution.
NUCLEAR APPLICATIONS OF CONDENSATE TREATMENT
THE SCIENCE OF A PURE ENVIRONMENT
Certified ISO9001
Via Pietro Nenni, 15 - 27058 – VOGHERA – ITALYTel. +39 0383 3371 – Fax +39 0383 369052
E-mail: [email protected]
Thank you !
STATE OF THE ART TECHNOLOGIES FORNUCLEAR ENERGY APPLICATIONS
