Optimum few-group cross section set for HCDAs in heterogeneous LMFBRs
Conference
·
OSTI ID:5395813
The loss of sodium in a hypothetical transient with failure to scram proceeds sequentially. In heterogeneous cores, the high power-to-flow fuel regions during the accident will boil first and voiding will propagate to the internal blankets with some time lag. Ideally the multigroup cross sections should take this into account. It would be unrealistic to attempt to generate different multigroup cross sections for each phase of the transient. The objective is to present a simple to implement and yet quite accurate scheme for generating an optimal multigroup cross section set for use in hypothetical core disruptive accidents (HCDA) analysis of heterogenous LMFBRs. Based on present and the past design procedures, five sets of multigroup cross section sets have been generated for calculating flowing sodium void reactivities of heterogeneous cores.
- Research Organization:
- General Electric Co., Sunnyvale, CA (USA). Advanced Reactor Systems Dept.
- DOE Contract Number:
- AM03-76SF00893
- OSTI ID:
- 5395813
- Report Number(s):
- GEFR-SP-180; CONF-800607-32
- Country of Publication:
- United States
- Language:
- English
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