Reactor control systems
Description
Object: To alleviate the breakage of fuel rods due to a sudden increase in output density during operation by the provision of means for preventing the withdrawal of a control rod operating at values above a predetermined value. Structure: A control rod is withdrawn by a control rod drive means, and a detection signal is applied as an output from a position measuring means to a position memorizing means in a low output resion for producing and memorizing a control rod pattern for output increase. Thereafter, the prevailing position of the control rod for which an increase in output is demanded is measured by the position measuring means for comparison with the value memorized by the position memorizing means. In this way, when the control rod is withdrawn in excess of the memorized value, an alarm is produced by an operation monitoring means while stopping control rod withdrawal. (Kamimura, M.)
Availability note (English)
Available from The Japan Patent Information Center, Tokyo; hard paper copy 40 Yen/page (mailing charge additional).Additional details
Publishing Information
- Imprint Pagination
- 8 p.
- IPC:
- Int. Cl. G21C7/12.
- IPC
- Int. Cl. G21C7/12.
- Patent number
- JP patent document 1976-101692/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 8332904
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BWR TYPE REACTORS; CONTROL EQUIPMENT; CONTROL ROD DRIVES; EFFICIENCY; FUEL ELEMENT FAILURE; REACTOR CONTROL SYSTEMS; REACTOR OPERATION; REACTOR SAFETY
- Descriptors DEC
- ACCIDENTS; CONTROL SYSTEMS; OPERATION; REACTOR ACCIDENTS; REACTOR COMPONENTS; REACTORS; SAFETY; WATER COOLED REACTORS; WATER MODERATED REACTORS