engleski

Comparison of R5G Coupled Code and Classical “Two-steps” Containment Calculation

Using one Steam Line Break scenario and one Stuck Open PORV scenario, originally developed for Krsko Full Scope Simulator, the benefits of coupled system-containment code usage over classical two-steps calculation procedure were demonstrated. RELAP5 mod3.3, GOTHIC and coupled RELAP5-GOTHIC code R5G were used to perform classical mass and energy and then containment calculation and coupled code calculation. For most of the design bases accidents and transients in current Light Water Reactors level of interaction between system and containment is low and decoupled system and containment runs can be performed. It is demonstrated that coupled code, once when it is available, can be easier to use, can give better prediction, and can reduce possibility of error during manipulation with mass and energy release data. Additional benefits are available when coupled code can share trips generated in system and containment part of the code.

RELAP; GOTHIC; coupled code; containment

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