REACTOR CONTROL ROD DESIGN METHOD AND REACTOR CONTROL ROD EVALUATION METHOD

PROBLEM TO BE SOLVED: To easily determine reactivity worth and nuclear lifetime in a method of designing or evaluating a control rod for boiling-water reactor.SOLUTION: A control rod for reactor is configured by separately disposing two plate-like vane pieces 17 each composed of hafnium neutron abso...

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Bibliographic Details
Main Authors KIKUCHI TSUKASA, MATSUMIYA KOJI, TAJIMA TOMOKO, UEDA KIYOSHI, YOSHIOKA KENICHI
Format Patent
LanguageEnglish
Published 12.11.2012
Subjects
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To easily determine reactivity worth and nuclear lifetime in a method of designing or evaluating a control rod for boiling-water reactor.SOLUTION: A control rod for reactor is configured by separately disposing two plate-like vane pieces 17 each composed of hafnium neutron absorber, constituting each vane 11 by using a plate-like neutron absorber spacer 18 for a length of at least 1/4 full effective length from a distal end side in an insertion/ejection axis direction between both the vane pieces 17, and cross coupling four vanes 11. Among a function of effective thickness of hafnium in the vane piece 17, a function of an absorber spacer width (x), a function of an axial center water area width (w), a function of a non-absorber section width (v) in installation inside vane pieces and a function of vane thickness B, the reactivity worth is represented as functions of the effective thickness of hafnium and the absorber spacer width (x) at least in the vane pieces.
Bibliography:Application Number: JP20110085287