Control rod position detection device
Description
The present invention can detect the position of a control rod for controlling the power of a nuclear reactor accurately free from the effect of the dropping speed. That is, the device of the present invention comprises a ultrasonic wave receiving device and a control rod extension rod having a structure of reflecting ultrasonic waves. The ultrasonic waves are transmitted laterally to the extension rod of the control rod. The ultrasonic waves reflected from the control rod extension rod are received and the reflecting signals are detected. With such a constitution, the position of the control rod can be recognized accurately. The determination for the shape by the ultrasonic waves is generally possible up to about 1mm. In view of the above, grooves are formed to the control rod extension rod at 1mm pitch and, if the groove that passes the position of the ultrasonic wave transmission/receiving element is judged, the position of the control rod can be measured on 1mm unit. (I.S.)
Availability note (English)
Available from JAPIO. Also available from EPO.Additional details
Publishing Information
- Imprint Pagination
- 4 p.
- IPC:
- Int. Cl. G21C17/10.
- IPC
- Int. Cl. G21C17/10.
- Patent number
- JP patent document 6-109889/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 25073956
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- CONTROL ELEMENTS; CONTROL ROD DRIVES; DISPLACEMENT GAGES; POSITIONING; REACTOR INSTRUMENTATION; REACTOR MAINTENANCE; ULTRASONIC TESTING; ULTRASONIC WAVES; ULTRASONOGRAPHY
- Descriptors DEC
- ACOUSTIC TESTING; DIAGNOSTIC TECHNIQUES; MAINTENANCE; MATERIALS TESTING; MEASURING INSTRUMENTS; NONDESTRUCTIVE TESTING; REACTOR COMPONENTS; SOUND WAVES; TESTING
Optional Information
- Secondary number(s)
- JP patent application 4-259619.