Neutron flux monitoring device
Creators
- 1. Toshiba Corp., Kawasaki, Kanagawa (Japan)
Description
The present invention provides a neutron flux monitoring device for preventing occurrence of erroneous reactor scram caused by the elevation of the indication of a start region monitor (SRM) due to a factor different from actual increase of neutron fluxes. Namely, judgement based on measured values obtained by a pulse counting method and a judgment based on measured values obtained by a Cambel method are combined. A logic of switching neutron flux measuring method to be used for monitoring, namely, switching to an intermediate region when both of the judgements are valid is adopted. Then, even if the indication value is elevated based on the Cambel method with no increase of the counter rate in a neutron source region, the switching to the intermediate region is not conducted. As a result, erroneous reactor scram such as 'shorter reactor period' can be avoided. (I.S.)
Availability note (English)
Available from JAPIO. Also available from EPO.Additional details
Publishing Information
- Imprint Pagination
- 6 p.
- IPC:
- Int. Cl. G21C17/108; G01T3/00.
- IPC
- Int. Cl. G21C17/108; G01T3/00.
- Patent number
- JP patent document 9-189795/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 29001034
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BWR TYPE REACTORS; IN CORE INSTRUMENTS; NEUTRON DETECTORS; NEUTRON FLUX; NEUTRON MONITORS; REACTOR CONTROL SYSTEMS; REACTOR PERIOD; SCRAM
- Descriptors DEC
- CONTROL SYSTEMS; ENRICHED URANIUM REACTORS; MEASURING INSTRUMENTS; MONITORS; POWER REACTORS; RADIATION DETECTORS; RADIATION FLUX; RADIATION MONITORS; REACTOR SHUTDOWN; REACTORS; SHUTDOWN; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Secondary number(s)
- JP patent application 8-1095.