Published October 26, 1976 | Version v1
Patent Metadata-only

Neutron source for reactor

Creators

Description

Purpose: To prevent heavy particles, particularly alpha-particles, emitted from a beryllium cylinder of neutron source devise from directly colliding a holder outer or inner tube by providing the beryllium cylinder with metal liners. Constitution: Gamma-rays radiated from a gamma-ray source provided within a neutron source holder collide a beryllium cylinder within the holder to produce neutrons by the (γ, n) reaction. At the same time, a great quantity of helium and alpha-particles is produced due to neutrons present within the reactor, and some of alpha-particles are emitted to the holder outer or inner tube. However, since metal liners are provided between the beryllium cylinder on one hand and inner and outer tubes on the other hand, alpha-particles are absorbed by the metal liners, so that there is no possibility of causing radioactive damage to the outer or inner tube. (Seki, T.)

Availability note (English)

Available from JAPATIC, Tokyo; hard paper copy 50 Yen/page (mailing charge additional).

Additional details

Publishing Information

Imprint Pagination
4 p.
IPC:
Int. Cl. G21C7/00; G21G4/02.
IPC
Int. Cl. G21C7/00; G21G4/02.
Patent number
JP patent document 1978-54692/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
10445466
Subject category
S07: ISOTOPES AND RADIATION SOURCES;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
ABSORPTION; ALPHA PARTICLES; BERYLLIUM; CYLINDERS; LINERS; NEUTRON SOURCES; PERFORMANCE; RADIATION PROTECTION; REACTOR START-UP; SUPPORTS
Descriptors DEC
ALKALINE EARTH METALS; CHARGED PARTICLES; ELEMENTS; HELIUM IONS; IONS; MECHANICAL STRUCTURES; METALS; PARTICLE SOURCES; RADIATION SOURCES