Fast Reactors and Accelerator Driven Systems Knowledge Base

Conference Article: Effect of temperature dependency in material properties to hot spot subfactors

Hishida, Hisashi (Mitsubishi Atomic Power Industries, Inc., Tokyo (Japan))

Abstract

Effect of the temperature dependency of pellet thermal conductivity to hot spot subfactors for the fuel center temperature is discussed. The deviation in the fuel pellet hot spot temperature due to the manufacturing tolerance in pellet characteristics results in shifting the pellet thermal conductivity range, which usually gives favourable hot spot temperature rise. In this note, some numerical examples are given where such effects as being due to the shift in ,pellet conductivity range are illustrated in connection to the subfactors affecting linear heat rate and gap conductance.

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key words: data; fuel cans; fuel rods; hot spot factor; hot spots; temperature dependence; thermal conductivity
Reference:
Summary report of a panel meeting held in Karlsruhe, 22-24 November 1973 on the recommendation of the International Working Group on Fast Reactors. 1974. p. 133-142
International Atomic Energy Agency, Vienna (Austria)
IAEA-TECDOC--166, pp:206-209