ML20009F581
| ML20009F581 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 07/06/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8107310328 | |
| Download: ML20009F581 (2) | |
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'OFFJCIAL COPY 400 Chestnut Street Tower II July 6, 1981 g
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SQRD-50-328/81-41 s
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Q Mr. James P. O'Reilly, Director JUL301937u i
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Office of Inspection and Enforcement b *** Q g w d)
U.S. Nuclear Regulatory Ccmmission Q
Region II - Suite 3100 b/
j 101 Marietta Street a
Atlanta, Georgia 30303
Dear Mr. O'Reilly:
SEQUOYAH NUCLEAR PLANT UNIT 2 - FAILURE TO FULFILL COMMITMENT ON NCR 27P - SQRD-50-328/81 FINAL REPORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on June 5,1981 in accordance with 10 CFR 50.55(e) as NCR SQN NEB 8128. Enclosed is our final report.
If you have any questions, please get in touch with D. L. Lambert at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY i, [t
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I, \\( d 7[ L L. M. Nills, Manager Nuclear Regulation and Sallety u
Enclosure cc:
Mr. Victor Stello, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 CII Oo g
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ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2
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FAILURE TO FULFILL COMMITPENT ON NCR 27P SQRD-50-328/81-41 10 CFR 50.55(e)
FINAL REPORT Description of Deficiency During the recent TVA commitment control investigation, it was discovered that a ce=mitment made by TVA in a final report to NRC-0IE (from L. M. Mills to J. P. O'Reilly dated August 25, 1980) concerning nonconformance report 27P was not co=pleted. The seal-in contacts of all affected IX relays were not removed fro: the circuit breakers in the 6.9 kV shutdown board by November 3, 1980 as scheduled. The apparent cause of this failure was due to two contributing factors:
(1) Failure to track the co= itment under Engineering Design (EN DES)
Engineering Procedure (EP) 2.07--This occurred because a decision was made (erroneously) not to track OIE cot =1tments because it was believed that these co=mitments were being adequately tracked by separate methods in the Division of Construction (CONST).
(2) Failure to coordinate coc=itment responsibilities and scheduling between offices within TVA--This is primarily due to the Office of Engineering Design and Construction (CEDC) (the organization taking the co :ittent) not identifying the co==itment to the Office of Power (POWER) (the organization responsible for implementation of the cc==ittent).
f Safety Implicatiens Had this conditien remained uncorrected, failure to implecent corrective acticns as committed could have resulted in a failure to re=ove the seal-in contacts of the IX relays from the circuit breakers in the 6.9 kV shutdown board, creating 6.9 kV circuit breakers lockout. This condition could result in a failure of the safety injecticn pumps to start under emergency conditions.
Corrective Action TVA submitted a revised final report for NRC 27P with a revised schedule for implementaticn of corrective acticns.
Cot =itment tracking records were prepared and transmitted to the Office of Power (to be included in their committent tracking program) to preclude recurrence of this problem.
Completien of the TVA cc=rittent investigation program, which identified this conditicn, will result in previous OIE co==ittents not ce=pleted to date (if any) being properly tracked as per EN DES-EP 2.07.
EN DES-EP 2.07 is being revised to implement a number of changes which include the following:
(1) Expand the co==itments control program to include OEDC commitments made in letters to NRC-01E.
(2) Provide for a cethod of transferring a commitment to POWER to be incl'uded in their tracking system.
This revision (Revision 4) will be issued by September 11, 1981.
Increased tanage=ent emphasis has ueen placed on the cctaitment tracking (control) in OECC.
Cot =itments to NRC-0IE un de since the identification phase of the cor=itcent investigation are beiug properly trackcd now and will be in the future.
.