Control rod for use in nuclear reactor
Creators
- 1. Toshiba Corp., Kawasaki, Kanagawa (Japan)
Description
Purpose: To reduce the abrasion of rollers and suppress the increase of radiation doses. Constitution: A guide roller is disposed to the upper hand, while a limiter roller is disposed therebelow to the lower hand of a control rod supported vertically movably between fuel assemblies. Each of the guide roller and the limiter roller is made of iron-based alloy, and a support pin for each of the rollers is applied with nitridation at the surface of the iron-based alloy substrate to form a nitride layer thereon. Since the pin substrate is made of the iron-based alloy, the nitridation can be applied easily, abrasion resistance in water is excellent and the abrasion loss is reduced as compared with conventional cobalt or nickel-based alloy. In addition, since each of the rollers is made of iron-based alloy, abrasion with the pin is also reduced. Accordingly, products caused by frictional abrasion are reduced to suppress the increase in radiation doses. (S.K.)
Availability note (English)
Available from JAPIO. Also available from INPADOC.Additional details
Publishing Information
- Imprint Pagination
- 5 p.
- IPC:
- Int. Cl. G21C7/12.
- IPC
- Int. Cl. G21C7/12.
- Patent number
- JP patent document 63-235895/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 20057207
- Subject category
- S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- ABRASION; CONTAMINATION; CONTROL ELEMENTS; FUEL ELEMENT CLUSTERS; NITROGEN COMPOUNDS; NUCLEAR POWER PLANTS; RADIATION DOSES; STAINLESS STEELS; SUPPORTS; SURFACE TREATMENTS
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; FUEL ASSEMBLIES; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL STRUCTURES; NUCLEAR FACILITIES; POWER PLANTS; REACTOR COMPONENTS; STEELS; THERMAL POWER PLANTS
Optional Information
- Secondary number(s)
- JP patent application 62-69078.