Published October 30, 1979 | Version v1
Patent Open

High exposure control rod finger

Creators

Description

A reactor control rod containing a stack of B4C absorber pellets in the lower end have a radius smaller than that of the other pellets and are wrapped with a sleeve having a linear compressibility sufficient to accommodate exposure-induced radial expansion of the end pellets without producing excessive clad strain. They have a thermal conductivity sufficient to keep the centerline temperature of the end pellets below the melting point of B4C. One such sleeve material is a type 347 stainless steel having 22.5% theoretical density

Availability note (English)

MF available from INIS under the Report Number.

Files

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Additional details

Additional titles

Augmented title (English)
Patent

Publishing Information

Imprint Pagination
6 p.
IPC:
Int. Cl.G21C7/10.
IPC
Int. Cl.G21C7/10.
Patent number
US patent document 4,172,762/A/

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
11544682
Subject category
S22: GENERAL STUDIES OF NUCLEAR REACTORS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
BORON CARBIDES; CONTROL ELEMENTS; NEUTRON ABSORBERS; PWR TYPE REACTORS; SPECIFICATIONS; STAINLESS STEEL-347; SURFACE COATING
Descriptors DEC
ALLOYS; BORON COMPOUNDS; CARBIDES; CARBON ADDITIONS; CARBON COMPOUNDS; CHROMIUM ALLOYS; CHROMIUM STEELS; CHROMIUM-NICKEL STEELS; CORROSION RESISTANT ALLOYS; DEPOSITION; HEAT RESISTING ALLOYS; IRON ALLOYS; IRON BASE ALLOYS; NICKEL ALLOYS; NIOBIUM ADDITIONS; REACTOR COMPONENTS; REACTORS; STAINLESS STEELS; STEELS; TRANSITION ELEMENT ALLOYS; WATER COOLED REACTORS; WATER MODERATED REACTORS