Correlation of recent fission product release data
For the calculation of source terms associated with severe accidents, it is necessary to model the release of fission products from fuel as it heats and melts. Perhaps the most definitive model for fission product release is that of the FASTGRASS computer code developed at Argonne National Laboratory. There is persuasive evidence that these processes, as well as additional chemical and gas phase mass transport processes, are important in the release of fission products from fuel. Nevertheless, it has been found convenient to have simplified fission product release correlations that may not be as definitive as models like FASTGRASS but which attempt in some simple way to capture the essence of the mechanisms. One of the most widely used such correlation is called CORSOR-M which is the present fission product/aerosol release model used in the NRC Source Term Code Package. CORSOR has been criticized as having too much uncertainty in the calculated releases and as not accurately reproducing some experimental data. It is currently believed that these discrepancies between CORSOR and the more recent data have resulted because of the better time resolution of the more recent data compared to the data base that went into the CORSOR correlation. This document discusses a simple correlational model for use in connection with NUREG risk uncertainty exercises. 8 refs., 4 figs., 1 tab.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6066811
- Report Number(s):
- CONF-890546-7; ON: DE89012972
- Resource Relation:
- Conference: Seminar on fission product transport processes in reactor accidents, Dubrovnik, Yugoslavia, 22 May 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
FISSION PRODUCT RELEASE
C CODES
FUEL ELEMENTS
REACTOR ACCIDENTS
AEROSOLS
CORRELATION FUNCTIONS
F CODES
FISSION PRODUCTS
MATHEMATICAL MODELS
RADIOACTIVE EFFLUENTS
REACTOR SAFETY
SOURCE TERMS
ACCIDENTS
COLLOIDS
COMPUTER CODES
DISPERSIONS
FUNCTIONS
ISOTOPES
MATERIALS
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
REACTOR COMPONENTS
SAFETY
SOLS
WASTES
220502* - Nuclear Reactor Technology- Environmental Aspects- Radioactive Effluents
220900 - Nuclear Reactor Technology- Reactor Safety
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)