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1. WO2012087871 - NUCLEAR CONTROL ROD POSITION INDICATION SYSTEM

Publication Number WO/2012/087871
Publication Date 28.06.2012
International Application No. PCT/US2011/065729
International Filing Date 19.12.2011
IPC
G21C 7/06 2006.01
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
7Control of nuclear reaction
06by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
CPC
G01D 5/2515
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
12using electric or magnetic means
25Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts
251one conductor or channel
2515with magnetically controlled switches, e.g. by movement of a magnet
G21C 17/12
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
17Monitoring; Testing
10Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
12Sensitive element forming part of control element
G21C 7/12
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
7Control of nuclear reaction
06by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
08by displacement of solid control elements, e.g. control rods
12Means for moving control elements to desired position
G21C 9/02
GPHYSICS
21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
CNUCLEAR REACTORS
9Emergency protection arrangements structurally associated with the reactor ; , e.g. safety valves provided with pressure equalisation devices
02Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; ; Control elements having arrangements activated in an emergency
Y02E 30/30
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
30Energy generation of nuclear origin
30Nuclear fission reactors
Applicants
  • WESTINGHOUSE ELECTRIC COMPANY LLC [US]/[US] (AllExceptUS)
Inventors
  • KOWLES, Joseph, E.
  • STORY, David, A.
Agents
  • SPADACENE, Joseph, C.
Priority Data
13/326,46515.12.2011US
61/424,74520.12.2010US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) NUCLEAR CONTROL ROD POSITION INDICATION SYSTEM
(FR) SYSTÈME D'INDICATION DE POSITION DE BARRES DE COMMANDE NUCLÉAIRES
Abstract
(EN)
A high temperature reed switch position indicator for a pressurized water reactor in which the drive rod housing is completely immersed in the reactor coolant. The reed switch sensor modules positioned along the control rod drive rod travel housing are constructed solely of metallic, ceramic and glass materials and are sealed within an outer housing to isolate the sensor assembly from the coolant.
(FR)
L'invention porte sur un indicateur de position de contact en ampoule à haute température, pour un réacteur à eau sous pression, dans lequel le boîtier de barre d'entraînement est complètement immergé dans le système caloporteur du réacteur. Les modules de capteur de contact en ampoule positionnés le long du boîtier de déplacement de barre d'entraînement de la barre de commande sont constitués uniquement de matériaux métalliques, céramiques et vitreux et sont scellés hermétiquement à l'intérieur d'un boîtier externe afin d'isoler l'ensemble capteur du système caloporteur.
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