ML17138A566
| ML17138A566 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 03/16/1979 |
| From: | Robert Carlson NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Curtis N PENNSYLVANIA POWER & LIGHT CO. |
| References | |
| NUDOCS 7904110350 | |
| Download: ML17138A566 (4) | |
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Docket Nos.
50-387 50-388 UNITED STATES NUCLEAR REGULATORY COMMISSION REGION I 6$I PARK AVENUE KING OF PRUSS'IA, PENNSYLVANIA 19406 tfAR 26 kg Pennsylvania Power and Light-Company ATTN:
Mr. Norman W. Curtis Vice President
,Engineering and Construction (N-4) 2 North Ninth'Street, Allentown, Pennsylvania 18101 Gentlemen:
Subject:
Susquehanna Steam Electric Station Interim Report of a Deficiency in the Installation of Limitorque Motor Operators on Valves (Your'letter of March 2, 1979)
Thank you for your letter, referenced
- above, which forwarded an interim report pursuant to 10 CFR 50.55(e) regarding the subject matter.
Your report will be reviewed and evaluated, and should we require additional information concerning this. matter, we will contact you.
Your cooperation with us is appreciated.
Sincerely, l
Pl Robert T. Garison, Chief Reactor Construction and Engineering Support Branch CC:
A. R. Sabol,
- Manager, Nuclear guality Asssurance W. E. Barberich, Licensing Engineer
TWO NORTH NINTH STREET, ALLENTOWN,'A. 18101 PHONE:
(215) 821-5151 NORMAN W. CURTIS Vice President. Engineering IL Construction 821-5381 March 2, 1979 Mr;. Boyce H. Grier Director, Region I U. S; Nuclear Regulatory Commission 621 Park Avenue King of Prussia, Pennsylvania 18406 SUSQUEHANNA STEAM ELECTRIC STATION, INTERIM REPORT OF A DEFICIENCY IN THE INSTALLATION OF LIMITORQUE MOTOR OPERATORS ON VALVES ERs 100450/100508 FILE 840-4 PLA-329
Dear Mr; Grier:
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~
This serves to confirm information provided to NRC Resident Inspector R.. Gallo on 2/27/79 and relates to the subject deficiency which has been determined to be reportable. under the provisions of 10CFR50.55(e).
PPGL'as been advised by Bechtel Corporation's quality assurance staff organization that a generic problem exists with regard to the failure of valve manufacturers to stake the stem nuts fastening certain Limitorcye motor operatotrs to valves.
This condition has been identified with respect to Limitorque Model No.
SMB and Model No.
SMC motor operators.
f The potential for impact on safety has been established since the failure to stake the lock nut may result in the operators of their respective valves to cease operating at any valve position.
In assuming a worst case condition for safety related systems, failure of a valve operator to properly acctuate its respective valve could affect the safe shut down of the plant.
Bechtel's Quality Assurance Supervisor for the SSES Project has, through MCAR-1 G-l, directed that a plan for investigation and corrective action be devised for SSES.
When the particulars of this plan and milestones for its
Mr. Boyce H. Grier March 2, 1979 completion have been established, the Commission will be advised immediately and. a date for completing all necessary corrective action will be provided in a subsecpxent report(s).
Very truly yours>
N.
W. Curtis-Vice President-Engineering
&'onstruction ARS:mcb cc:
Mr. J.
G. Davis (15)'Acting Director-Office of Inspection 6 Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr., G. McDonald, Director (1)
Office of Management: Information 6 Program Control U., S: Nuc3.ear Regulatory Commission Washington; D.C.'0555 Mr;. Robert M. Gallo.
U'.'S: Nuclear Regulatory Commission P 0 Box 52 Shickshinny, Pennsylvania 18655
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