Nuclear reactor cooling system decontamination reagent regeneration. [PWR; BWR]
An improved method for decontaminating the coolant system of water-cooled nuclear power reactors and for regenerating the decontamination solution is described. A small amount of one or more weak-acid organic complexing agents is added to the reactor coolant, and the pH is adjusted to form a decontamination solution which is circulated throughout the coolant system to dissolve metal oxides from the interior surfaces and complex the resulting metal ions and radionuclide ions. The coolant containing the complexed metal ions and radionuclide ions is passed through a strong-base anion exchange resin bed which has been presaturated with a solution containing the complexing agents in the same ratio and having the same pH as the decontamination solution. As the decontamination solution passes through the resin bed, metal-complexed anions are exchanged for the metal-ion-free anions on the bed, while metal-ion-free anions in the solution pass through the bed, thus removing the metal ions and regenerating the decontamination solution.
- DOE Contract Number:
- EY-76-C-02-2985
- Assignee:
- Dept. of Energy
- OSTI ID:
- 6617936
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BWR TYPE REACTORS
COOLANT CLEANUP SYSTEMS
PWR TYPE REACTORS
DECONTAMINATION
ION EXCHANGE
ION EXCHANGE MATERIALS
ORGANIC ACIDS
PRIMARY COOLANT CIRCUITS
RESINS
CLEANING
COOLING SYSTEMS
ENERGY SYSTEMS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled