Published October 9, 1985 | Version v1
Patent Metadata-only

Control rod withdrawal monitor

Creators

Description

Purpose: To monitor whether a control rod is connected with control rod drives or not in BWR type reactors. Constitution: The monitor is provided with a function of judging whether the neutron flux changes normally or not upon operation of a control rod by using the variation amount of a control rod operation signal and a neutron flux signal and inhibiting the control rod operation or generating an alarm if the change of the neutron flux is anbormal. The total value for the signals from four neutron detection strings surrounding the control rod is used as the neutron flux signal. The change of the neutron flux is judged by comparing the levels of the total value before and after the withdrawal of the control rod. (Ikeda, J.)

Availability note (English)

Available from JAPIO. Also available from INPADOC.

Additional details

Publishing Information

Imprint Pagination
5 p.
IPC:
Int. Cl. G21C17/10.
IPC
Int. Cl. G21C17/10.
Patent number
JP patent document 60-200196/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
17065415
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BWR TYPE REACTORS; CONTROL ROD DRIVES; NEUTRON FLUX; REACTOR INSTRUMENTATION; REACTOR MONITORING SYSTEMS; ROD DROP ACCIDENTS; ROD EJECTION ACCIDENTS
Descriptors DEC
ACCIDENTS; ENRICHED URANIUM REACTORS; POWER REACTORS; RADIATION FLUX; REACTIVITY INSERTIONS; REACTOR ACCIDENTS; REACTOR COMPONENTS; REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Secondary number(s)
JP patent application 59-56083.