Induced nuclear reactions: processes – systems – and elements – Control component for a fission reactor – Wherein concentration of the reactivity affecting material...
Patent
1988-02-24
1989-08-29
Behrend, Harvey E.
Induced nuclear reactions: processes, systems, and elements
Control component for a fission reactor
Wherein concentration of the reactivity affecting material...
376327, G21C 710
Patent
active
048615447
ABSTRACT:
In a control rod for a nuclear reactor having a cruciform shape with four flat planar members, an improved membrane for safeguarding against crevice cracking corrosion is disclosed. Each of the four flat planar members of the control rod is fabricated from side-by-side tubular members containing sealed neutron absorbing poisons. Each of the tubular members has square outside sections. These square outside sections are welded together to form the flat planar members of the control rod. The improvement includes a protective membrane wrapped over the structural flat planar member. The protective membrane surrounds the member and is maintained to the planar member under compression by ambient reactor pressure. The membrane provides an additional margin against crevice corrosion cracking by preventing the water of the reactor from coming into contact with the welded side-by-side square sectioned tubular members. Because the membrane is not under tension, it is not subject to either irradiation assisted stress corrosion cracking nor conventional stress corrosion cracking.
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Behrend Harvey E.
General Electric Company
Schroeder Robert R.
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