CONTROL ROD DRIVE APPARATUS UTILIZING ALLOYS WITH LOW TO ZERO COBALT CONTENT
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United States of America Patent
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Issued Date -
Jun 26, 2014
app pub date -
Dec 20, 2012
filing date -
Dec 20, 2012
priority date (Note) -
Abandoned
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Abstract
A control rod drive apparatus may include a cylindrical housing structure having a proximal end and an opposing distal end. A drive assembly including a drive piston and an index tube may be arranged within the cylindrical housing structure. A flange may be connected to the proximal end of the cylindrical housing structure and may define a vacancy therein. A check valve ball may be disposed within the vacancy, wherein the vacancy may be configured to facilitate a displacement of the check valve ball between an open position and a closed position. The control rod drive apparatus may also include a collet assembly within the cylindrical housing structure. The check valve ball and/or the collet assembly may be made of an alloy having less than 2% cobalt by weight.
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