HTGR Knowledge Base

Conference Article: Compact Heat Exchangers Technologies for the HTRs Recuperator Application

Abstract

After a ten year operation period, the total activity of the released nuclides in the primary system is about 58 GBq. The highest activity is found in the pre-cooler. Other components with high activities are the recuperator and the compressor. These components are contaminated mainly by 110mAg. The gas ducts in the energy conversion unit are contaminated by 110mAg and 131I.
Contamination as a consequence of incident conditions is difficult to estimate, because it depends on a number of phenomena. Under the assumption that 10 fuel elements are damaged, the activity is about 44 GBq.

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Reference:

IAEA Technical Committee Meeting on “Gas Turbine Power Conversion Systems for Modular HTGRs”, held from 14-16 November 2000 in Palo Alto, California

International Atomic Energy Agency, Vienna (Austria). Technical Working Group on Gas-Cooled Reactors

IAEA-TECDOC--1238, pp:149-160