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3. Four MCP Loss of Power
We conducted this analysis by tripping all 4 MCP's. The pressurizer pressure set point was reset to 150 bar after reactor scram. Since the MCP's are not running, the normal spray cannot be used. The auxiliary spray is manually started to reduce the pressure. No other manual actions were taken. SG-3 BRU-A should have been disabled according to the sequence of events. But the outcome would have not much difference.