Development and demonstration of techniques for reducing occupational radiation doses during refueling outages. Task 1. Steam generator channel head decontamination

Technical Report · Thu Mar 01 04:00:00 EST 1984

OSTI ID:5952540

Abrams, W T; Cope, A W; Orsulak, R M; Rosenthal, P R

The overall objective of Task 1 was to demonstrate an effective method for removing tenacious corrosion products in a pressurized water reactor steam generator and thus significantly reduce radiation exposure during subsequent maintenance activities. Various decontamination methods were evaluated and a multistep, low concentration chemical process originated by Kraftwerk Union A.G. (KWU) of the Federal Republic of Germany was selected. The process was further developed and tested by C-E and KWU in West Germany and at C-E's facilities in Windsor, Connecticut. C-E designed, fabricated and tested a portable system to apply the process at Millstone Point II. The decontamination of the primary channel heads of the two Millstone steam generators was performed by C-E and NUSCO during the 1983 refueling shutdown of Millstone Point II plant. Results of the decontamination were very satisfactory. NUSCO determined that a net savings of 3660 man-rem of personnel exposure was realized during the decontamination demonstration and the subsequent maintenance work on the steam generators.

• Research Organization: Combustion Engineering, Inc., Windsor, CT (USA)
• DOE Contract Number: AC02-81NE34079
• OSTI ID: 5952540
• Report Number(s): DOE/NE/34079-T4; ON: DE85006600
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
BOILERS
CLEANING
CORROSION PRODUCTS
DECONTAMINATION
DEPOSITS
DOSES
MAINTENANCE
PERSONNEL
PWR TYPE REACTORS
RADIATION DOSES
REACTOR MAINTENANCE
REACTORS
STEAM GENERATORS
SURFACE CLEANING
SURFACE FINISHING
VAPOR GENERATORS
WATER COOLED REACTORS
WATER MODERATED REACTORS