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Title:
NUCLEAR CHARACTERISTIC PREDICTING METHOD AND NUCLEAR CHARACTERISTIC PREDICTING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2021/014820
Kind Code:
A1
Abstract:
A nuclear characteristic predicting method comprises: step S23 of measuring a nuclear characteristic of a reactor that changes due to a reactor core power changing operation at a nuclear power plant to obtain a measured value of the change in the nuclear characteristic; step S24 of determining a calculated value of the nuclear characteristic corresponding to the measured value through reactor core calculation using an uncorrected nuclear constant; step S22 of acquiring a plurality of values of the nuclear characteristic through reactor core calculation with the nuclear constant perturbed using perturbation data of the nuclear constant created on the basis of prepared macro covariance data and calculating sensitivity data based on the plurality of values of the nuclear characteristic acquired; step S25 of calculating a correction amount for the nuclear constant on the basis of the sensitivity data so that the calculated value reproduces the measured value; and step S27 of predicting a change in the nuclear characteristic of the reactor due to a next reactor core power changing operation using the nuclear constant corrected with the correction amount.

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Inventors:
IEYAMA KOICHI (JP)
TAKEMOTO YUKI (JP)
MATSUI MASAFUMI (JP)
ASANO KOJI (JP)
KOIKE HIROKI (JP)
TANAKA KENTAROU (JP)
SATO DAISUKE (JP)
Application Number:
PCT/JP2020/023414
Publication Date:
January 28, 2021
Filing Date:
June 15, 2020
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
G21C17/00
Foreign References:
JP2019152448A2019-09-12
JP2019015544A2019-01-31
JP2014153285A2014-08-25
JP2013065213A2013-04-11
JP2009156745A2009-07-16
US5912933A1999-06-15
CN105426342A2016-03-23
Other References:
NAKAGAWA, MASAYUKI ET AL.: "A computer programme for perturbation calculations by correlated sampling monte carlo method", JAPAN ATOMIC ENERGY RESEARCH INSTITUTE, 30 November 1979 (1979-11-30), pages 1 - 40
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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