NRC Generic Letter 78-26, Excessive Control Rod Guide Tube Wear

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July 13, 1978

LTRS ADDRESSED TO LICENSEES

(ALL B&W PLANTS IN ORB #4:DOR)

Gentlemen:

RE:

We have recently sent the enclosed letter to Babcock & Wilcox Company regarding the potential for excessive control rod guide tube wear at facilities using the B&W design. This information is required to assess the significance of control rod guide tube wear at your facility.

We requested the required information from the vendor, in order to provide us with an overall assessment of this problem and to minimize the amount of utility, vendor and NRC staff work required. However, should this approach to obtain the necessary information not be successful, a direct response to the enclosed questions, from each licensee utilizing the B&W design, will be required.

We request your cooperation with B&W in generating and analyzing the control rod guide tube wear data necessary to address this concern.

Sincerely,

Brian K Grimes, Assistant Director for Engineering and Projects Division of Operating Reactors

Enclosure:

Letter to B&W dated June 13, 1978