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Patent Searching and Data


Title:
PROTECTION DEVICE FOR FEEDWATER PUMP
Document Type and Number:
Japanese Patent JPH05256992
Kind Code:
A
Abstract:

PURPOSE: To obtain a protection device for feedwater pump capable of protecting the feedwater pump even in the case of generating a cause of sudden change in the feedwater heater drain.

CONSTITUTION: A protection device for feedwater pump has a flow meter 20 to detect the suction flowrate coming in a feedwater pump 8 for feeding water in the reactor and a comparator 23 to calculate the flowrate deviation between a predetermined feedwater setting value for a cause of sudden change in the feedwater heater drain and the suction flowrate detected by the flowmeter 20. Also provided are a setter 24 for setting a control value for a steam control valve 18 based on the flow deviation in accordance with the cause of the sudden change in the feedwater heater drain, and a lower value priority circuit 25 for choosing the lower value as the control value for the steam control valve 18, between the control value for the steam control valve 18 set by the setter 24 and the control value for the steam control valve 18 from a water level controller for controlling the reactor water level.


Inventors:
Nakao Kazu
Application Number:
JP8752492A
Publication Date:
October 08, 1993
Filing Date:
March 12, 1992
Export Citation:
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Assignee:
Toshiba Corporation
International Classes:
G21D3/04; (IPC1-7): G21D3/04
Attorney, Agent or Firm:
Monda Makoto