Experience with chemical system decontamination by the CORD process and electrochemical decontamination of pipe ends
Efforts to reduce occupational radiation exposure during inspection and repair work in nuclear power plants turns steadily increasing attention to the decontamination of systems and components. Due to the advanced age of nuclear power plants resulting in increasing dose rates, the decontamination of components, or rather of complete systems, or loops to protect operating and inspection personnel becomes demanding. Besides, decontaminating complete primary loops is in many cases less difficult than cleaning large components. Based on experience gained in nuclear power plants, an outline of two different decontamination methods performed recently are given. For the decontamination of complete systems or loops, Kraftwerk Union AG has developed CORD, a low-concentration process. For the decontamination performance of a subsystem, such as the steam generator (SG) channel heads of a pressurized water reactor or the recirculation loops of a boiling water reactor the automated mobile decontamination appliance is used. The electrochemical decontamination process is primarily applicable for the treatment of specially limited surface areas.
- OSTI ID:
- 5529593
- Report Number(s):
- CONF-870837-
- Journal Information:
- Trans. Am. Nucl. Soc.; (United States), Journal Name: Trans. Am. Nucl. Soc.; (United States) Vol. 54; ISSN TANSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
210800* -- Nuclear Power Plants-- Economics
BOILERS
BWR TYPE REACTORS
CLEANING
CONTROL EQUIPMENT
COOLING SYSTEMS
DECONTAMINATION
DOSES
ENERGY SYSTEMS
EQUIPMENT
FILTERS
FLOW REGULATORS
INSPECTION
PRIMARY COOLANT CIRCUITS
PUMPS
PWR TYPE REACTORS
RADIATION DOSES
RADIATION PROTECTION
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
STEAM GENERATORS
VALVES
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS