Title:
CONTROL ROD OPERATION MONITORING SYSTEM AND CONTROL ROD OPERATION MONITORING METHOD
Document Type and Number:
Japanese Patent JP2019219240
Kind Code:
A
Abstract:
To provide a control rod operation monitoring method capable of monitoring control rod insertion in an entire core during operation of a nuclear reactor, and a control rod operation monitoring system.SOLUTION: The present invention relates to a system for detecting abnormal drive of a control rod 12 of a boiling-water reactor. The system comprises: a detection section consisting of multiple LPRM detectors 4 disposed in LPRM assemblies 1 disposed in a lattice shape inside of a pressure container 10; and an arithmetic unit 5 for calculating an evaluation value from signal values of the LPRM detectors 4 in the detection section and determining whether or not abnormal distortion occurs in axial output distribution from whether or not the evaluation value is deviated from a reference value. In one LPRM assembly 1, the LPRM detectors 4 are disposed one by one at positions of different heights, and multiple LPRM detectors 4 belonging to one LPRM assembly 1 are connected to different channels without being overlapped.SELECTED DRAWING: Figure 2
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Inventors:
AKAIKE MASANORI
TSUCHIYA AKIYUKI
KONDO TAKAO
TSUCHIYA AKIYUKI
KONDO TAKAO
Application Number:
JP2018116001A
Publication Date:
December 26, 2019
Filing Date:
June 19, 2018
Export Citation:
Assignee:
HITACHI GE NUCLEAR ENERGY LTD
International Classes:
G21C17/10; G21C7/08; G21C17/108; G21C17/12; G21D3/04
Domestic Patent References:
| JPH09178880A | 1997-07-11 | |||
| JP2017161344A | 2017-09-14 |
Attorney, Agent or Firm:
Kaichi International Patent Office