Magnetic switch for reactor control rod. [LMFBR]

Patent · Thu Sep 30 00:00:00 EDT 1982

OSTI ID:5714499

Germer, J H

A magnetic reed switch assembly is described for activating an electromagnetic grapple utilized to hold a control rod in position above a reactor core. In normal operation the magnetic field of a permanent magnet is short-circuited by a magnetic shunt, diverting the magnetic field away from the reed switch. The magnetic shunt is made of a material having a Curie-point at the desired release temperature. Above that temperature the material loses its ferromagnetic properties, and the magnetic path is diverted to the reed switch which closes and short-circuits the control circuit for the control rod electro-magnetic grapple which allows the control rod to drop into the reactor core for controlling the reactivity of the core.

• DOE Contract Number: AT03-76SF71032
• Assignee: ERA-08-053950; EDB-83-176364
• Application Number: ON: DE83018032
• OSTI ID: 5714499
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
LMFBR TYPE REACTORS
SCRAM RODS
SWITCHES
ENGINEERED SAFETY SYSTEMS
REACTOR CONTROL SYSTEMS
BREEDER REACTORS
CONTROL ELEMENTS
CONTROL SYSTEMS
ELECTRICAL EQUIPMENT
EPITHERMAL REACTORS
EQUIPMENT
FAST REACTORS
FBR TYPE REACTORS
LIQUID METAL COOLED REACTORS
REACTOR COMPONENTS
REACTORS
220400* - Nuclear Reactor Technology- Control Systems
210500 - Power Reactors
Breeding