Browns Ferry Nuclear Plant Unit 2: Control rod drive scram discharge headers decontamination effort

Technical Report · Mon Aug 01 00:00:00 EDT 1983

OSTI ID:5147664

Traynor, J C

The control rod drive (CRD) scram discharge headers were decontaminated during the Browns Ferry unit 2, cycle 4 refueling outage (August 2-5, 1982). Hydrolasing (high-pressure water blasting) was used as the method of decontamination to remove fixed and loose radioactive contaminants from the headers. It was found that hydrolasing of the west scram discharge headers resulted in approximate maximum and average decontamination factors (DFs) on contact of 13 and 5, respectively. For the east scram discharge headers, hydrolasing resulted in a maximum and average DF on contact of approximately 3. The maximum and average DFs on contact for the individual headers ranged from 1 to 33 and 1 to 10, respectively, while the walkway (head-level) DFs were in the range of 3 to 4. Higher DFs were impeded by inadequate drainage and backwashing of fluid. This led to increased radiation levels in some areas and recontamination of adjacent headers.

• Research Organization: Tennessee Valley Authority, Chattanooga (USA). Div. of Energy Demonstrations and Technology
• OSTI ID: 5147664
• Report Number(s): TVA/OP/EDT-83/26; ON: DE84900910
• Resource Relation: Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
BROWNS FERRY-2 REACTOR
CONTROL ROD DRIVES
DECONTAMINATION
JETS
WATER
BWR TYPE REACTORS
CLEANING
ENRICHED URANIUM REACTORS
HYDROGEN COMPOUNDS
MIXED SPECTRUM REACTORS
OXYGEN COMPOUNDS
POWER REACTORS
REACTOR COMPONENTS
REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled