REACTOR SYSTEM PRESSURE CONTROL PROCEDURES, BY REACTOR NUCLEUS POWER MODULATION.

摘要

Pressure control procedures of reactor system, by modulation of reactor core power. A control procedure in a system (8), which has a turbine-generator (4) and a BWR (10), which modulates the thermal power of the reactor core (12) while maintaining the turbine control valves (22) Main in a constant stable position. The thermal power of the core (12) can be adjusted by adjusting the control bar density inside the reactor core (12), or by adjusting the flow rate through the reactor (10) that can be performed by modulating the speed of variable frequency recirculation pumps (40), or by modulating recirculation flow control valves (44). The procedure includes transferring the power generation system from the pressure control by normal turbine control valve modulation (22), to pressure control by core thermal power modulation (12). Additionally, the procedure includes modifying the predisposition of closure of the bypass valve (54) and the predisposition of the power control to accommodate the variations from the pressure control by modulation of core power (12) above the control normal pressure