Magnetic nuclear core restraint and control

Details Magnetic nuclear core restraint and control Magnetic nuclear core restraint and control

1978-01-20

1979-05-01

Behrend, Harvey E.

176 50, 176 78, G21C 730

Patent

active

041522079

ABSTRACT:
A lateral restraint and control system for a nuclear reactor core adaptable to provide an inherent decrease of core reactivity in response to abnormally high reactor coolant fluid temperatures. An electromagnet is associated with structure for radially compressing the core during normal reactor conditions. A portion of the structures forming a magnetic circuit are composed of ferromagnetic material having a curie temperature corresponding to a selected coolant fluid temperature. Upon a selected signal, or inherently upon a preselected rise in coolant temperature, the magnetic force is decreased a given amount sufficient to relieve the compression force so as to allow core radial expansion. The expanded core configuration provides a decreased reactivity, tending to shut down the nuclear reaction.

REFERENCES:
patent: 3629070 (1971-12-01), Stankiewicz
patent: 3939039 (1976-02-01), Seki et al.
patent: 4070241 (1978-01-01), Pennell et al.

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