Role of ex-vessel interactions in determining the severe reactor-accident source term for fission products. [PWR; BWR]
Conference
·
OSTI ID:5870281
The role fission-product release and aerosol generation outside the primary system can have in determining the severe reactor-accident source term is reviewed. Recent analytical and experimental studies of major causes of ex-vessel fission product release and aerosol generation are described. The ejection of molten-core debris from a pressurized-reactor vessel is shown to be a potentially large source of aerosols that has not been recognized in past severe-accident evaluations. A mechanistic model of fission-product release during core-debris interactions with concrete is discussed. Calculations with this model are compared to correlations of experimental data and previous estimates of ex-vessel fission-product release. Predictions with the mechanistic model agree quite well with the data correlations but do not agree at all well with estimates made in the past.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA); Ktech Corp., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5870281
- Report Number(s):
- SAND-83-0800C; CONF-830816-25; ON: DE83016071
- Country of Publication:
- United States
- Language:
- English
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· Trans. Am. Nucl. Soc.; (United States)
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PWR TYPE REACTORS
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REACTOR SAFETY
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WATER MODERATED REACTORS