Mid-loop operating method for nuclear power plant, and facility

Details Mid-loop operating method for nuclear power plant, and facility Mid-loop operating method for nuclear power plant, and facility

1994-02-02

1995-11-21

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Reactor protection or damage prevention

Auxiliary heat removal structure

376298, G21C 1518

Patent

active

054694809

ABSTRACT:
The currently used atomic reactors has to be refueled periodically. During this refueling, the checking and repair of the major sections of the atomic reactor are carried out, and therefore, a low water level operation, i.e., mid-loop operation, is carried out for removing the residual heat. According to the present invention, a round-about pipe conduit is additionally installed between a suction pipe conduit and a discharge pipe conduit of the residual heating removing pump, and a flow rate adjusting valve is installed on the round-about pipe conduit. Thus the flow passing through the pump is maintained at the normal operation level during the mid-loop operation, while, as the residual heat is decreased, the round-about flow rate is gradually increased until the suction rate from the hot leg can be maintained at a proper level, thereby preventing the introduction of air into the residual heat removing pump.

REFERENCES:
patent: 4957693 (1990-09-01), Lau
patent: 5263067 (1993-11-01), Ekeroth et al.
patent: 5268943 (1993-12-01), Corletti et al.
patent: 5331674 (1994-07-01), Evans et al.

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