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Conference Article: Energy Storage and Release Calculations for HTR-10 Reactor

Abstract

Significant amount of lattice defects are created in graphite under the exposure of fast neutrons. If irradiation temperature is high enough, in-situ annealing takes place. However, annealing is difficult at low temperatures and excess energy associated with lattice defects tends to be stored in graphite. Uncontrolled release of this energy may cause appreciable temperature increase in the material. The magnitude of energy release and associated temperature increase may be a safety concern and should be assessed during the gas cooled reactor design stage. This study deals with the calculation of stored energy in the reflector during the operation of HTR-10 pebble bed gas cooled reactor and its release upon a temperature increase caused by a transient event.

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Reference:

Proceedings of the Conference on High Temperature Reactors, Petten, NL, April 22-24, 2002
Organized by HTR-TN in cooperation with the European Nucler Society (ENS) and the IAEA

International Atomic Energy Agency, Vienna (Austria)

HTR-2002, pp:1-5