Control rod cooling mechanism
Description
Object: To facilitate the inspection and maintenance of control rods and control rod drives. Structure: A control rod inner tube is provided to penetrate a reactor core section within a calandria tank, and the upper end of the tube is provided with a control rod drives. A control rod is moved vertically within the tube by means of a wire rope. Meanwhile, part of a coolant circulation path passes through the outer portion of the calandria tank and connects portion of the control rod guide tube below the core section with portion of the control rod guide tube above the core section. With this construction, it is possible to perfectly separate the heavy water region and helium space within the tank and the interior of the control rod guide tube. Thus, there is no possibility of emission of radioactive substances through the guide tube even by removing the control rod drives. (Yoshino, Y.)
Availability note (English)
Available from JAPATIC, Tokyo; hard paper copy 40 Yen/page (mailing charge additional).Additional details
Publishing Information
- Imprint Pagination
- 3 p.
- IPC:
- Int. Cl. G21C7/08.
- IPC
- Int. Cl. G21C7/08.
- Patent number
- JP patent document 1977-57497/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 9368190
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- CALANDRIAS; CONFIGURATION; CONTROL ELEMENTS; CONTROL ROD DRIVES; COOLING SYSTEMS; HEAVY WATER; HWLWR TYPE REACTORS; MAINTENANCE; PRESSURE TUBE REACTORS
- Descriptors DEC
- CONTAINERS; HEAVY WATER MODERATED REACTORS; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; POWER REACTORS; REACTOR COMPONENTS; REACTORS; WATER; WATER COOLED REACTORS