ML19290D003

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Supplements 780829 Request for 1977 Info Re Failure of Control Rods to Fully Insert.Requests Summary of Recent Failure & Other Control Rod Drive Malfunctions.Response Should Be Sent within 90 Days
ML19290D003
Person / Time
Site: Brunswick  
Issue date: 01/10/1980
From: Ippolito T
Office of Nuclear Reactor Regulation
To: Fones J
CAROLINA POWER & LIGHT CO.
References
NUDOCS 8002150322
Download: ML19290D003 (2)


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JANUARY 1 0 1980 Docket Nos. 50-325 and 50-324 Mr. J. A. Jones Executive Vice President Carolina Power and Light Company 336 Fayetteville Street Raleigh, North Carolina 27602

Dear Mr. Jones:

In response to our letter of August 29, 1978, you provided information on your 1977 experience of control rods failing to fully insert. We evaluated your response along with those provided by other BWR owners. We concluded that such events are general and that the frequencies of occurrence vary among the BWRs, apparently because of different maintenance programs.

Our August 29, 1978 letter recommended that ycu maintain an ongoir.g tabulation of any additional such events. To detemine whether or not the frequency of these events has changed for a given plant, we now request that you report your more recent experience. This report should include the experience from the time of the last reported occurrence through 1979.

In addition please provide a summary of other control rod drive malfunctions, such as unlatchings, for the same time period.

The infomation should be provided within 90 days. For each event, identify the number of roos not fully inserted, the position of the rods, the cause for failure to fully insert, and any related maintenance activities.

This request for additional generic information is in accordance with the GA0 blanket clearance number 8-180225 (R0536) which expires June 30, 1981.

Si ncerely,

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Thomas, Ippolito, Chi.f Operating Reactors Branch #3 Division of Operating Reactors P

8002150 321

Mr. - J. A. Jones Carolina Power & Light Company

-2 cc:

Richard E. Jones, Esquire Carolina Power & Light Corpany 336 Fayetteville Street Raleigh, North Carolina 27602 George F. Trowbridge, Esquire Shaw, Pittman, Potts & Trowbridge 1800 M Street, N. W.

Washington, D. C.

20036 John J. Burney, Jr., Esquire Burney, Burney, Sperry & Barefoot 110 North Fifth Avenue Wilmington, North Carolina 28401 Resident Inspector U. S. Nuclear Regulatory Commission P. O. Box 1057 Southport, North Carolina 28461 Southport - Brunswick County Library 109 W. Moore Street Southport, North Carolina 28461