Effect of balance of plant and control system feedback on amplitude of power and flow oscillations

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6492269

Wulff, W; Cheng, H S; Mallen, A N

The BNL Engineering Plant Analyzer (EPA) for BWR power plants predicts as amplitude of 1300% of full power for limit-cycle, core-wide power oscillations after postulated scram failure at the LaSalle-2 power plant. This is larger than the TRAC-G predictions by General Electric (GE) and the RETRAN predictions by the Electric Power Research Institute. Modeling and computing errors in the EPA are analyzed here as potential causes for EPA's over-predictions of peak fission power. It is concluded that the EPA is more likely to under-predict than to over-predict fission power peaks. It is found that the omission of dynamic BOP feedback effects from TRAC-G modeling and the premature termination of TRAC-G calculations account for most of TRAC-G's under-prediction of the fission power peaks. 7 refs., 9 figs.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• Sponsoring Organization: NRC
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6492269
• Report Number(s): BNL-NUREG-45274; CONF-9010224--5; ON: DE91004012
• Country of Publication: United States
• Language: English

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REACTOR ACCIDENTS
REACTOR CONTROL SYSTEMS
REACTOR KINETICS
REACTOR SAFETY
REACTORS
SAFETY
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WATER COOLED REACTORS
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