Method and apparatus for feed-water control in a steam generatin

Power plants – Motive fluid energized by externally applied heat – Having condition responsive control

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606441, 60646, 122406ST, 376246, 376247, 376370, 376402, F22D 528, F22D 530, G21D 104

Patent

active

046515305

ABSTRACT:
A method and an apparatus for feed-water control in a steam generating plant such as a boiling water nuclear reactor having motor-driven feed-water pumps and turbine-driven feed-water pumps for supplying feed-water to a steam generator, in which the feed-water flow through the turbine-driven feed-water pumps is controlled to be maintained constant, while reducing the recirculation flow discharged from the turbine-driven feed-water pumps and fed back to the inlet thereof, so as to reduce the amount of feed-water supplied to the steam generator by the motor-driven feed-water pumps, whereby variation of water level in the steam generator during switching between the two kinds of feed-water pumps is suppressed.

REFERENCES:
patent: 3284312 (1966-11-01), West
patent: 3384550 (1968-05-01), Hanzalek
patent: 3431168 (1969-03-01), Kjemtrup
patent: 4046628 (1977-09-01), Middleton
patent: 4290850 (1981-09-01), Omori et al.
patent: 4322267 (1982-03-01), Kinoshita et al.
patent: 4440715 (1984-04-01), Sato et al.

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