ML18031A302
| ML18031A302 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 10/04/1979 |
| From: | Robert Carlson NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Curtis N PENNSYLVANIA POWER & LIGHT CO. |
| References | |
| NUDOCS 7911120107 | |
| Download: ML18031A302 (3) | |
Text
Q UNITED STATES NUCLEAR REGULATORY COMMISSION REGION I 631 PARK AVENUE KING OF PRUSSIA, PENNSYLVANIA19406 Docket Nos.
50-388 October 4, 1979 Pennsylvania Power It 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 September 26, 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, R. T. Carlson, Chic Reactor Construction and Engineering Support Branch CC:
A. R. Sabol,
- Manager, Nuclear guality Assurance W.
E. Barberich, Licensing Engineer R.
W. Dunn, Superintendent of Plant (0
~011120
TWO NORTH NINTH STREET, ALLENTOWN, PA.
18101 PHONE:
(215) 82 I 5151 NORMAN W. CURTIS Vice President-Engineering 8 Construction 821.5381 September 26, 1979 Mz. Boyce H. Grier Director, Region I U. S. Nuclear Regulatory Commission 621 Park Avenue King of Prussia, Pennsylvania 18406 SUSQUEHANNA STEAM ELECTRIC STATION UPDATED STATUS OF A REPORT OF A DEFICIENCY IN THE INSTALLATIONOF LIMITORQUE MOTOR OPERATORS ON VALVES ERs 100450/100508 FILE 840-4 PLA-403
Dear Mr. Grier:
This serves as an update to our interim report regarding the failure of valve manufacturers to stake the stem lock riuts'astening Limitorque Mode'1 No.
SMB and SMC motor operators to valves.
The 'deficiency was initially reported under the provisions of 10 CFR 50.55(e) by PPGL letter PLA-329, dated March 2, 1979, which advised that the Commission would be further advised of PPGL's corrective action and a date for completion thereof.
To date it has been determined that this deficiency pertains only to rising stem type valves and a total of 658 valves have been identified within the Bechtel scope of supply as being suspect with regard to unstaked stem lock nuts.
In addition, Bechtel has been requested to identify, inspect and correct the valves within the G.E. scope of supply which are similarly affected.
Field personnel are in the process of inspecting all valves which are presently suspect and Bechtel construction forces are staking all nonconforming lock nuts.
Approximately 40% of the valves inspected so far have required corrective action.
The inspection and correction effort is continuing and is expected to be completed in the spring of 1980. It is anticipated that the final report on this deficiency will be issued by April 15, 1980.
Very truly yours, N. N. Curtis Vice President-Engineering
& Construction PENNSYLVANIA POWER IL LIGHT COPAPANY
Mr. Boyce H. Grier September 26, 1979 ARS smcb cc:
Mr. Robert M. Gallo U. S. Nuclear Regulatory Commission P.
O. Box 52 Shfckshinny> Pennsylvania
- 1S655, Mr. G. McDonald Office of Management Information 6 Program Control U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. Victor Stello (15)
Director Office of Inspection G Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.
20555