Method and apparatus for load following with a single-cycle boil

Details Method and apparatus for load following with a single-cycle boil Method and apparatus for load following with a single-cycle boil

1976-12-03

1979-04-24

Ostrager, Allen M.

Power plants

Motive fluid energized by externally applied heat

Heating motive fluid by nuclear energy

60652, 60678, 60680, G21D 308

Patent

active

041505468

ABSTRACT:
The invention is directed to a method and apparatus for providing a single-cycle boiling moderator-coolant nuclear reactor which accommodates changes in demand with a turbine generator on direct governor control. Current single-cycle boiling moderator-coolant nuclear reactors employ turbine generators that are slaved to the reactor. This arrangement is dictated because of inherent response limitations of the single-cycle boiling moderator-coolant nuclear reactor. The system of the present invention diverts steam from steam consuming normal auxiliary plant equipment to maintain reactor pressure when a rapid increase in turbine power demand is made such as during a daily load following or a frequency regulation change in demand. This allows the turbine generator to be placed on direct governor control. Rapid positive or negative demands accepted by the turbine cause a decrease or an increase in the pressure of the reactor. Reactor pressure is monitored by a pressure regulator which in the case of a rapid increase in demand throttles steam normally directed to feedwater heaters or steam reheaters and redirects the steam to the turbine. In the case of a rapid decrease in demand the pressure regulator by-passes a portion of the primary flow of steam to a condenser. Steam is redirected or by-passed until the reactor has time to respond to the change in demand.

REFERENCES:
patent: 1499697 (1924-07-01), Ruths
patent: 1728375 (1929-09-01), Stender
patent: 3271953 (1966-09-01), Carson
patent: 3630839 (1971-12-01), Podolsky

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