Mechanistic model for Sr and Ba release from severely damaged fuel

Conference · Fri Nov 01 04:00:00 EST 1985

OSTI ID:6156526

Rest, J; Cronenberg, A W

Among radionuclides associated with fission product release during severe accidents, the primary ones with health consequences are the volatile species of I, Te, and Cs, and the next most important are Sr, Ba, and Ru. Considerable progress has been made in the mechanistic understanding of I, Cs, Te, and noble gas release; however, no capability presently exists for estimating the release of Sr, Ba, and Ru. This paper presents a description of the primary physical/chemical models recently incorporated into the FASTGRASS-VFP (volatile fission product) code for the estimation of Sr and Ba release. FASTGRASS-VFP release predictions are compared with two data sets: (1) data from out-of-reactor induction-heating experiments on declad low-burnup (1000 and 4000 MWd/t) pellets, and (2) data from the more recent in-reactor PBF Severe Fuel Damage Tests, in which one-meter-long, trace-irradiated (89 MWd/t) and normally irradiated (approx.35,000 MWd/t) fuel rods were tested under accident conditions. 10 refs.

• Research Organization: Argonne National Lab., IL (USA); Engineering Science and Analysis, Idaho Falls, ID (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6156526
• Report Number(s): CONF-860204-30; ON: TI86005540
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220502* -- Nuclear Reactor Technology-- Environmental Aspects-- Radioactive Effluents
ACCIDENTS
ALKALINE EARTH METALS
BARIUM
COMPUTERIZED SIMULATION
ELEMENTS
ENVIRONMENTAL TRANSPORT
FISSION PRODUCT RELEASE
FUEL ELEMENT FAILURE
ISOTOPES
MASS TRANSFER
MATHEMATICAL MODELS
METALS
RADIOACTIVITY TRANSPORT
RADIOISOTOPES
RADIONUCLIDE MIGRATION
REACTOR ACCIDENTS
SIMULATION
STRONTIUM