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TRAC-BD1/MOD1, an improved analysis code for boiling water reactor transients
Walter L. Weaver III, M. M. Giles, Chen‐Chi Tsai, J.D. Milton
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Abstract
The mission of the TRAC-BD1/MOD1 code has been expanded to provide an analysis capability for not only a large and small break Loss-of-Coolant Accident (LOCA), but also operational transients and anticipated transients without scram in Boiling Water Reactor (BWR) systems and related experimental facilities for which point reactor kinetics are adequate. New models developed to support this expanded mission include a reactivity feedback model, improved void distribution models, and a control systems model. These models are described and results of a generator load rejection transient and a main steamline isolation valve closure transient using these new models are presented.