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Method and device for monitoring performance of internal pump

  • US 6,619,111 B2
  • Filed: 08/31/2001
  • Issued: 09/16/2003
  • Est. Priority Date: 02/07/2001
  • Status: Expired due to Term
First Claim
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1. A method for monitoring the performance of internal pumps in a nuclear power plant in which a coolant is driven through plural internal pumps placed inside the reactor vessel, the method comprising the steps of:

  • measuring a pump motor power input to each motor driving said pumps;

    estimating the power input to said pump motor during a test performed outside said plant corresponding to the speed of each pump and the pump flow measured in the reactor pressure vessel;

    computing a pump motor input power ratio based on said measured value and said estimated value; and

    detecting the variation in the performance of said internal pumps.

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