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Validation of EOPs/FRGs Procedures Using LOHS Scenario

Validation of EOPs (Emergency Operating Procedures) and FRGs (Function Restoration Guidelines) can be achieved either through plant full scope simulator or on desk top exercises. The desk top exercise is conducted when for the given scenario plant full scope simulator is not suitable. In either verification cases predefined scenario should be evaluated and possible branching foreseen. The scenario presented is LOHS, with bleed and feed procedure initiated. Best estimate light water reactor transient analysis code RELAP5/mod3.3 was used in calculation. Standardized detailed plant model was used. Operator actions were modelled from beginning of the scenario to its termination.

RELAP5; Loss of Heat Sink (LOHS); Bleed and Feed; Emergency Operating Procedures (EOP); Function Restoration Guidelines (FRG); rod temperature; operator action; core cooling; loss of natural circulation

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