Induced nuclear reactions: processes – systems – and elements – Control component for a fission reactor – Fuse actuated devices
Patent
1983-08-15
1986-05-06
Kyle, Deborah L.
Induced nuclear reactions: processes, systems, and elements
Control component for a fission reactor
Fuse actuated devices
G21C 700
Patent
active
045870853
ABSTRACT:
A safety device is disclosed for use in a nuclear reactor for axially repositioning a control rod with respect to the reactor core in the event of an upward thermal excursion. Such safety device comprises a laminated helical ribbon configured as a tube-like helical coil having contiguous helical turns with slidably abutting edges. The helical coil is disclosed as a portion of a drive member connected axially to the control rod. The laminated ribbon is formed of outer and inner laminae. The material of the outer lamina has a greater thermal coefficient of expansion than the material of the inner lamina. In the event of an upward thermal excursion, the laminated helical coil curls inwardly to a smaller diameter. Such inward curling causes the total length of the helical coil to increase by a substantial increment, so that the control rod is axially repositioned by a corresponding amount to reduce the power output of the reactor.
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ANL/CT-74-10, Proposal for the Development of Self Actuated Shutdown Systems for LMFBR Plants,, pp. 34, 35, 44, 48, and 49.
Fisher Robert J.
Glenn Hugh W.
Hightower Judson R.
Kyle Deborah L.
The United States of America as represented by the United States
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