NUCLEAR REACTOR WITH SCREW-NUT DRIVE OF THE CORE REACTIVITY CONTROL MEMBERS

A nuclear reactor includes a plurality of mechanisms (11) that drive the contact members (9) that control the reactivity, of the core. Each mechanism includes a driving member (21) including a driving part (23) forming one out of a screw or a nut, a member (27) for applying a rotary torque of the ro...

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Bibliographic Details
Main Authors ROUILLER, Jean-Luc, RANC, Lionel, DUMANOIS, Charles
Format Patent
LanguageEnglish
French
German
Published 06.06.2018
Subjects
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
NUCLEAR REACTORS
PHYSICS
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Summary:A nuclear reactor includes a plurality of mechanisms (11) that drive the contact members (9) that control the reactivity, of the core. Each mechanism includes a driving member (21) including a driving part (23) forming one out of a screw or a nut, a member (27) for applying a rotary torque of the rotor (19) to the driving member (21), a driven member (29) translationally connected to one of the control members (9) and including the other out of screw and a nut; and a member (33) that is selectively mobile between a position of blocking the driving member (21) and a position of releasing the driving member (21). In each drive mechanism (11), the motor (15) is fully immersed in the primary coolant inside the vessel (3); the rotor (19) has a central passage (35), the member for applying the rotary torque (27) being situated in or near the central passage (35); the driving member (21) includes a connecting part (37) engaged in the central passage (35) and collaborating with the member for applying the rotary torque (27), the connecting part (37) being free to effect a translational movement inside the central passage (35) with respect to the rotor (19) when the or each blocking member (33) is in the releasing position.
Bibliography:Application Number: EP20160745707