An Extended Rod Drop Method Applicable to Subcritical Reactor System Driven by Neutron Source

Control rod drop method based on the integral count technique and the extrapolation one was extended to apply to a subcritical reactor system driven by a neutron source. Similarly to the conventional method, the extended method is capable of rapid estimation of rod reactivity worth and is essential...

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Bibliographic Details
Published in:Journal of nuclear science and technology 2010-04, Vol.47 (4), p.351-356
Main Authors: TANINAKA, Hiroshi, HASHIMOTO, Kengo, OHSAWA, Takaaki
Format: Article
Language:English
Subjects:
Applied sciences
control rod worth
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Experimental methods and instrumentation for elementary-particle and nuclear physics
extrapolation technique
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
integral count technique
inverse kinetics method
Neutron sources
Nuclear fuels
Nuclear physics
Particle sources and targets
Physics
reactivity
rod drop method
source strength
subcritical reactor
UTR
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Summary:Control rod drop method based on the integral count technique and the extrapolation one was extended to apply to a subcritical reactor system driven by a neutron source. Similarly to the conventional method, the extended method is capable of rapid estimation of rod reactivity worth and is essential from the educational viewpoint. For the demonstration of the applicability, a series of rod drop experiments was carried out in subcritical and critical states of a reactor system, and rod reactivity worth and effective neutron source strength were determined from the counting data of a neutron detector. In addition, the time-sequence count data were acquired and the least-squares inverse kinetics analysis was made to justify the present extended method. The rod worth and source strength obtained by the present method were consistent with those obtained by the least-squares inverse kinetics method.
ISSN:0022-3131
1881-1248
DOI:10.1080/18811248.2010.9711965