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Advances in HTGR fuel performance models

Author
Stansfield, O. M.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Goodin, D. T., Hanson, D. L., and Turner, R. F.

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Summary
Fuel performance models based on empirical evidence are used to predict particle failure and fission product release in the design of high-temperature gas-cooled reactors (HTGRs). Advances in HTGR fuel performance models have improved the agreement between observed and predicted performance and contributed to an enhanced position of the HTGR with regard to investment risk and passive safety. Heavy metal contamination is the source of about 55% of the circulating activity in the HTGR during normal operation, and the remainder comes primarily from particles which failed because of defective or missing buffer coatings. These failed particles make up about 5 x 10/sup -4/ fraction of the total core inventory. In addition to prediction of fuel performance during normal operation, the models are used to determine fuel failure and fission product release during core heat-up accident conditions. The mechanistic nature of the models, which incorporate all important failure modes, permits the prediction of performance from the relatively modest accident temperatures of a passively safe HTGR to the much more severe accident conditions of the larger 2240-MW(t) HTGR.
Report Numbers
DE85007854; GA-A-17913; CONF-850398-3
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AT03-84SF11962
OSTI Identifier 5919137
Research organization: GA Technologies, Inc., San Diego, CA (USA).
View MARC record | catkey: 47350728