Conference Proceedings Paper
A CLIFF EDGE EVALUATION FOR CANDU-6 BEYOND DESIGN BASIS ACCIDENTS
35th Annual CNS Conference - 2015 May 31 - June 3
S. M. Kim (Korea Hydro & Nuclear Power Co.)
D. W. Kho (Korea Hydro & Nuclear Power Co.)
S. D. Yi (Nuclear Engineering Service & Solution)
S. H. Kang (Nuclear Engineering Service & Solution)
S. R. Kim (Nuclear Engineering Service & Solution)
The condition of nuclear power plant in the event of station black out (SBO) accompanying large-scale natural disaster exceeding design basis accident (DBA) was evaluated. Additional scenarios were added to the evaluation to review capability of the plant to endure different conditions with different actions. The analysis resulted that the key action required from the operator was to ensure the opening of main steam safety valves (MSSVs) in the secondary side and of motor-operated valves for high pressure injection of Emergency Core Cooling System (HPECCS) to mitigate accidents or extend the cliff edge.
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