Fission product release as a function of chemistry and fuel morphology

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:6928039

Hobbins, R R; Osetek, D J; Petti, D A; Hagrman, D L

Analysis of the consequences of severe reactor accidents requires knowledge of the location and chemical form of fission products throughout the accident sequence. Two factors that strongly influence the location and chemical form of fission products are the chemistry within the core and the morphology of the fuel or fuel-bearing debris. This paper reviews the current understanding of the these factors garnered from integral and separate effect experiments and the TMI-2 accident, and provides perspective on the significance of contributing phenomena for the analysis of severe accidents, particularly during the in-vessel phase. Information has been obtained recently on phenomena affecting the release of fission products from fuel and the reactor vessel during the in-vessel melt progression phase of a severe accident. The influence of a number of these phenomena will be reviewed, including fuel chemistry, H{sub 2}/H{sub 2}O ratio, fuel liquefaction, molten pools, and debris beds. 13 refs., 1 fig., 1 tab.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (USA)
• Sponsoring Organization: NRC
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6928039
• Report Number(s): EGG-M-89276; CONF-890546--9; ON: DE90010945
• Country of Publication: United States
• Language: English

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