Prediction of TMI-2 core temperatures from the fission-product release history. Final report

Technical Report · Sat Nov 01 00:00:00 EST 1980

OSTI ID:5274730

Rest, J; Johnson, C E

Phenomena associated with fission-gas and fission-product behavior during the accident at TMI-2 are discussed. Calculations performed with the GRASS-SST computer code are used to identify key factors infuencing gas release during TMI-2-type accident conditions. The calculations indicate that fission-product releases estimated from the accident data can be reached by the assumption that rapid fuel temperature increases during the accident led to enhanced bubble mobilities with some type of fuel fracturing. Also, it is concluded from known thermochemical behavior of the fission products that similar magnitudes for the release of Kr, Xe, Cs, and I/sub 2/ indicate that extensive fuel fracturing occurred; however, it is unlikely that temperatures in excess of 2000 K were reached over a large portion of the core.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5274730
• Report Number(s): EPRI-NSAC-12; ON: DE82004492; TRN: 82-013423
• Country of Publication: United States
• Language: English

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