EARLY CONTAINMENT RESPONSE IN ANTICIPATED TRANSIENT WITHOUT SCRAM IN BWRS

This paper studies the early containment pressure-temperature responses durint anticipated transients without scram for a boiling water reactor power plant. The conservation of mass and energy is considered for the pressure suppression pool, the containment, the drywell, and the upper pool, respectively, which are the four control volumes modeled in the paper. The study concludes that the suppression pool temperature is the most vulnerable parameter. Without the operator mitigation of actuating the boron injection, the pool temperature will exceed the design limit within about 23 minutes after the transient begins.