DISPOSITIF DE DECLENCHEMENT ET D'INSERTION D'ELEMENTS ABSORBANTS ET/OU MITIGATEURS DANS UNE ZONE FISSILE D'UN REACTEUR NUCLEAIRE ET ASSEMBLAGE DE COMBUSTIBLE NUCLEAIRE COMPORTANT UN TEL DISPOSITIF

A system for triggering and inserting a neutron absorber and/or mitigator (2) in a fissile area of a nuclear reactor, intended to be mounted in a nuclear fuel assembly wherein there flows a coolant, said system comprising a capsule (10) provided with holding means (11) for securing the absorber (2)...

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Bibliographic Details
Main Authors ESCLEINE JEAN MICHEL, MAILHE GUY, LORENZO DENIS, RAVENET ALAIN
Format Patent
LanguageFrench
Published 07.02.2014
Subjects
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Summary:A system for triggering and inserting a neutron absorber and/or mitigator (2) in a fissile area of a nuclear reactor, intended to be mounted in a nuclear fuel assembly wherein there flows a coolant, said system comprising a capsule (10) provided with holding means (11) for securing the absorber (2) in a non-inserted position, a stop surface (24) forming means for locking the holding means (11) and a thrust surface (26) forming means for releasing the absorber, said surfaces being carried by a control head (18). A collet (19) expands longitudinally differentially with regard to the capsule (10) under the effect of an increase in the temperature of the coolant and moves said surfaces (24, 26) such that the stop surface is moved away from the holding means at the normal operating temperature of the reactor, and the thrust surface (26) releases the absorber at a threshold temperature.
Bibliography:Application Number: FR20110061104