Title:
NON-DESTRUCTIVE ASSESSMENT METHOD FOR RADIATION DAMAGE OF REACTOR PRESSURE VESSEL IN NUCLEAR POWER PLANT
Document Type and Number:
WIPO Patent Application WO/2018/205607
Kind Code:
A1
Abstract:
A non-destructive assessment method for the radiation damage of a reactor pressure vessel in a nuclear power plant, comprising the following steps: S01, monitoring in real time magnetic performance parameters of a certain monitored part of the steel of a reactor pressure vessel during a normal operation period of a nuclear power plant, the magnetic performance parameters being any one from among magnetic susceptibility χ, residual magnetization MR and coercivity HC; S02, on the basis of the measured magnetic performance parameters, calculating neutron radiation damage fluence Φ or mechanical properties of the reactor pressure vessel; S03, using the neutron radiation damage fluence Φ or the mechanical properties as analysis input parameters, performing safety assessment or service life prediction for the structural integrity of the reactor pressure vessel during a radiation damage process. The method may achieve real-time repeated non-destructive measurement, while data is accurate and test operations are safe; the present invention may simultaneously monitor the degree of radiation damage at multiple positions of the reactor pressure vessel.
Inventors:
SHU GUOGANG (CN)
LI CHENGLIANG (CN)
CHEN JUN (CN)
DUAN YUANGANG (CN)
DENG XIAOYUN (CN)
RAN XIAOBING (CN)
LIU FEIHUA (CN)
LI CHENGLIANG (CN)
CHEN JUN (CN)
DUAN YUANGANG (CN)
DENG XIAOYUN (CN)
RAN XIAOBING (CN)
LIU FEIHUA (CN)
Application Number:
PCT/CN2017/116357
Publication Date:
November 15, 2018
Filing Date:
December 15, 2017
Export Citation:
Assignee:
CHINA NUCLEAR POWER ENG CO LTD (CN)
CHINA GENERAL NUCLEAR POWER GROUP (CN)
CHINA NUCLEAR POWER DESIGN COMPANY LTD SHENZHEN (CN)
CHINA GENERAL NUCLEAR POWER GROUP (CN)
CHINA NUCLEAR POWER DESIGN COMPANY LTD SHENZHEN (CN)
International Classes:
G21C17/003
Foreign References:
| CN106128528A | 2016-11-16 | |||
| JPH0949897A | 1997-02-18 | |||
| CN107123451A | 2017-09-01 | |||
| CN107146646A | 2017-09-08 | |||
| CN107123452A | 2017-09-01 | |||
| CN107358983A | 2017-11-17 | |||
| CN104282348A | 2015-01-14 | |||
| CN103868983A | 2014-06-18 | |||
| CN103712719A | 2014-04-09 | |||
| JP2006118904A | 2006-05-11 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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