Neutron shieldings
- 1. Nippon Atomic Industry Group Co. Ltd., Tokyo
Description
Purpose: To decrease the stresses resulted by the core bendings to the base of an entrance nozzle. Constitution: Three types of round shielding rods of different diameter are arranged in a hexagonal tube. The hexagonal tube is provided with several spacer pads receiving the loads from the core constrain mechanism at its outer circumference, a handling head for a fuel exchanger at its top and an entrance nozzle for self-holding the neutron shieldings and flowing heat-removing coolants at its bottom. The diameters for R1, R2 and R3 for the round shielding rods are designed as: 0.1 R1 < R2 < 0.2 R1 and 0.2 R1 < R2 < 0.3 R1. Since a plurality of shielding rods of small diameter are provided, soft structure are obtained and a plurality of coolant paths are formed. (Furukawa, Y.)
Availability note (English)
Available from JAPATIC. Also available from INPADOC.Additional details
Publishing Information
- Imprint Pagination
- 3 p.
- IPC:
- Int. Cl. G21C11/06.
- IPC
- Int. Cl. G21C11/06.
- Patent number
- JP patent document 54-159583/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 12585926
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BENDING; FBR TYPE REACTORS; FLEXIBILITY; HEXAGONAL CONFIGURATION; NEUTRONS; PIPES; REACTOR SAFETY; RELIABILITY; RODS; SHIELDS; SIZE; STRESS RELAXATION
- Descriptors DEC
- BARYONS; BREEDER REACTORS; CONFIGURATION; DEFORMATION; ELEMENTARY PARTICLES; EPITHERMAL REACTORS; FAST REACTORS; FERMIONS; HADRONS; MECHANICAL PROPERTIES; NUCLEONS; REACTORS; SAFETY; TENSILE PROPERTIES