ML20071D275

Responds to IE Bulletin 83-01 Re Failure of Westinghouse DB-type breakers.DB-type Breakers Tested at Least Once Per 31 Days & Verified Open When Undervoltage Coil Receives Simulated Trip Signal

ML20071D275
Person / Time
Site:	Farley
Issue date:	03/04/1983
From:	Clayton F ALABAMA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-SSINS-6820 IEB-83-01, IEB-83-1, NUDOCS 8303090312
Download: ML20071D275 (2)

Text

', Manian Addr=

, Alabama Power Company

• 600 North 18th Street Post Offics Box 2641 y Birmingham Alatisma 35291

/ Telephone 205 783-6081 F. L Clayton, Jr.

MO'*274'"' AlabamaPower the souttem c4ectnc system March 4, 1983 Docket Nos. 50-348 50-364 U.S. Nuclear Rep'ilatory Commission Region II, Suite 3100 101 Marietta Street, N.W.

Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly Joseph M. Farley Nuclear Plant - Units 1 and 2 I. E. Bulletin No. 83-01 Gentlemen:

I. E. Bulletin No. 83-01 dated February 25, 1983, requires Alabama Pcwer Company to provide a written reply by March 4,1983 concerning the recent failure of Westinghouse DB type breakers installed in the Reactor Protection System at another operating plant. The Joseph M. Farley Nuclear Plant - Units 1 and 2 have installed Westinghouse DS type breakers rather than DB type breakers; therefore, the specific action required by this bulletin is not applicable.

Since the basis for the issuance of the bulletin was a failure to trip upon receipt of a valid trip signal at another operating Westinghouse PWR, Alabama Power Company took the following immediate action at Farley Nuclear Plant:

Licensed operators were notifed of the failure to trip incident at another Westinghouse PWR and were required J to perform a refresher review of the Farley Emergency Operating Procedures related to Anticipated Transients Without Trip prior to rel'.eving their first shift after mid-day February 26, 1983.

A subsequent review of the surveillance testing and maintenance procedures verified that the Farley Reactor Protection System is well maintained and demonstrated reliable based on surveillance testing. The testing and maintenance of the Farley DS416 type breakers include the following:

8303090312 830304 j[//

PDR ADOCK 05000348 O PDR

0 Mr. James P. O'Reilly March 4, 1983 U. S. Nuclear Regulatory Commission Page 2

1. At least once per 31 days the reactor trip breakers are verified to open when the under-voltage coil receives a simulated trip signal during the performance of surveillance testing.

2. Prior to entering Mode 2 (if not tested in the past 7 days) the reactor trip breakers are verified to open when a manual trip signal is initiated from the main control board to the shunt trip coil.

3. The reactor trip breakers are maintained in accordance with the guidance provided in the Westinghouse technical manual for DS416 type breakers. This maintenance was performed on Unit 2 during the refueling outage in late 1982 and is scheduled to be completed during the present refueling outage for Unit 1.

Alabama Power Company will continue to evaluate failure data resulting from the failure to trip incident described in I. E.

Bulletin No. 83-01. Appropriate follow-up action will be taken at the Farley Nuclear Plant should the need arise.

If you have any questions, please contact us.

Yours very truly, Gt F. L. Clayton, Jr.

FLCJr/GGY:mjh-D32 cc: Mr. R. A. Thomas SWORN TO AND SUBSCRIBED BEFORE ME Mr. G. F. Trowbridge THIS 3Cd DAY OF Ayester/ , 1983 Mr. S. A. Varga Mr. E. A. Reeves Mr. W. H. Bradford / 2 /. g /aJ u /

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My Commission Expires:

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