Banked position withdrawal sequence. [BWR]
This report describes a revised method for developing control rod withdrawal sequences, the primary purpose of which is to mitigate the consequences of the control rod drop accident (CRDA) in the startup and low power (less than 20 percent of rated power) operating ranges of a boiling water reactor. This new withdrawal sequence will be referred to as the banked position withdrawal sequence (BPWS). The ability of the BPWS to reduce control rod reactivity worth and thus mitigate the consequences of a control rod drop accident was analyzed for a number of core designs and exposures. Calculations were also performed to determine the effect of the BPWS on scram reactivity, the effect of inoperable control rods on the BPWS, and compatibility of the BPWS with other reactor systems.
- Research Organization:
- General Electric Co., San Jose, CA (USA). Boiling Water Reactor Systems Dept.
- OSTI ID:
- 7308612
- Report Number(s):
- NEDO-21231; TRN: 77-013005
- Country of Publication:
- United States
- Language:
- English
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