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Title: SELF-REACTIVATING NEUTRON SOURCE FOR A NEUTRONIC REACTOR

Abstract

Reactors of the type employing beryllium in a reflector region around the active portion and to a neutron source for use therewith are discussed. The neutron source is comprised or a quantity of antimony permanently incorporated in, and as an integral part of, the reactor in or near the beryllium reflector region. During operation of the reactor the natural occurring antimony isotope of atomic weight 123 absorbs neutrons and is thereby transformed to the antimony isotope of atomic weight 124, which is radioactive and emits gamma rays. The gamma rays react with the beryllium to produce neutrons. The beryllium and antimony thus cooperate to produce a built in neutron source which is automatically reactivated by the operation of the reactor itself and which is of sufficient strength to maintain the slow neutron flux at a sufficiently high level to be reliably measured during periods when the reactor is shut down.

Inventors:
Issue Date:
OSTI Identifier:
4261845
Patent Number(s):
2872399
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
G - PHYSICS G21 - NUCLEAR PHYSICS G21C - NUCLEAR REACTORS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
NSA Number:
NSA-13-014039
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-59
Country of Publication:
United States
Language:
English
Subject:
REACTORS; ABSORPTION; ACTIVATION; ANTIMONY; ANTIMONY 123; ANTIMONY 124; BERYLLIUM; GAMMA RADIATION; NEUTRON FLUX; NEUTRON SOURCES; NEUTRONS; NUCLEAR REACTIONS; PHOTONEUTRONS; REACTIVITY; REACTOR CORE; REFLECTORS; SHUTDOWN

Citation Formats

Newson, H W. SELF-REACTIVATING NEUTRON SOURCE FOR A NEUTRONIC REACTOR. United States: N. p., 1959. Web.
Newson, H W. SELF-REACTIVATING NEUTRON SOURCE FOR A NEUTRONIC REACTOR. United States.
Newson, H W. Sun . "SELF-REACTIVATING NEUTRON SOURCE FOR A NEUTRONIC REACTOR". United States.
@article{osti_4261845,
title = {SELF-REACTIVATING NEUTRON SOURCE FOR A NEUTRONIC REACTOR},
author = {Newson, H W},
abstractNote = {Reactors of the type employing beryllium in a reflector region around the active portion and to a neutron source for use therewith are discussed. The neutron source is comprised or a quantity of antimony permanently incorporated in, and as an integral part of, the reactor in or near the beryllium reflector region. During operation of the reactor the natural occurring antimony isotope of atomic weight 123 absorbs neutrons and is thereby transformed to the antimony isotope of atomic weight 124, which is radioactive and emits gamma rays. The gamma rays react with the beryllium to produce neutrons. The beryllium and antimony thus cooperate to produce a built in neutron source which is automatically reactivated by the operation of the reactor itself and which is of sufficient strength to maintain the slow neutron flux at a sufficiently high level to be reliably measured during periods when the reactor is shut down.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {2}
}