EFFECT OF LOW-ENERGY RESONANCE ABSORBER ON POSITIVE NEUTRON TEMPERATURE-COEFFICIENT OF DILUTE PLUTONIUM-WATER SOLUTION

Authors
OBARA T SEKIMOTO H
Citation
T. Obara et H. Sekimoto, EFFECT OF LOW-ENERGY RESONANCE ABSORBER ON POSITIVE NEUTRON TEMPERATURE-COEFFICIENT OF DILUTE PLUTONIUM-WATER SOLUTION, Nuclear science and engineering, 130(3), 1998, pp. 386-390
Citations number
5
Categorie Soggetti
Nuclear Sciences & Tecnology
Journal title
Nuclear science and engineering → ACNP
ISSN journal
00295639
Volume
130
Issue
3
Year of publication
1998
Pages
386 - 390
Database
ISI
SICI code
0029-5639(1998)130:3<386:EOLRAO>2.0.ZU;2-6
Abstract
The positive neutron temperature coefficient of reactivity of a dilute plutonium-water solution is discussed analytically and numerically It is explained by the competition of the temperature sensitivity coeffi cients of microscopic thermal cross sections of fissile materials and absorbers. The use of Lu-176, Ta-180, or Er-167 which have absorption resonances at low energy in the solution makes it possible for the neu tron temperature coefficient of reactivity of a dilute plutonium-water solution to be negative.