HTGR Knowledge Base

Conference Article: Plate-out measurements and decontamination of a component of the AVR reactor at Juelich

Hanulik, J.; Schmied, H.; Wahl, J. (Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.))

Abstract

As a result of a water ingress on the 13.5.1978, due to a steam generator damage, various components of the AVR had to be repaired. The gas blower had to be removed from the loop. Thus accessible surface materials, which had been in contact for several years with the helium used as cooling-medium were available for research. This opportunity was used to get a survey of the deposition of fission and activation products in the primary circuit of a gas cooled high temperature reactor. In addition it was attempted to reduce the personal radiation exposure during the necessary maintenance work by decontamination treatment. In the following, the surface sampling techniques and the decontamination work are described. The results are discussed.

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key words: avr reactor; decontamination; deposition; fission products; primary coolant circuits; sampling; testing; cleaning; cooling systems; enriched uranium reactors; gas cooled reactors; graphite moderated reactors; helium cooled reactors; homogeneous reactors; htgr type reactors; isotopes; pebble bed reactors; power reactors; radioactive materials; reactor components; reactor cooling systems; reactors; solid homogeneous reactors; thermal reactors; thorium reactors
Reference:
Specialists meeting on coolant chemistry, plate-out and decontamination in gas-cooled reactors Juelich, Federal Republic of Germany 2-4 December 1980
International Atomic Energy Agency, Vienna (Austria)
IWGGCR--2, pp:99-106