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Summary
This report discusses the application of a model of irradiation hardening, originally developed for U.K. Magnox pressure vessel steels, in describing embrittlement in High Flux Isotope Reactor (HFIR) pressure vessel steels. In common with the HFIR, the steel pressure vessels of Magnox reactors were constructed from carbon-manganese mild steels in the 1960s and have since operated while receiving a high energy (E>1MeV) neutron flux of 1011 to 1.6¿̐ư1013n¿̐ưm2s¿̐ư1. The operational temperature of Magnox vessels at ¿̐ưcold¿̐ư locations (i.e. 167¿̐ưC (333¿̐ưF) to 225¿̐ưC (437¿̐ưF)) is somewhat higher than that of the HFIR vessel (50¿̐ưC (122¿̐ưF)). The model assumes that hardening has two contributors: a ¿̐ưradiation damage¿̐ư term, which depends on neutron fluence, but not flux, and a copper precipitation term, which is flux dependent.
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Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1990. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
