ML17157C037
| ML17157C037 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 10/15/1992 |
| From: | Raleigh J Office of Nuclear Reactor Regulation |
| To: | Keiser H PENNSYLVANIA POWER & LIGHT CO. |
| Shared Package | |
| ML17157C038 | List: |
| References | |
| TAC-M83987, NUDOCS 9210260170 | |
| Download: ML17157C037 (3) | |
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UNITED STATES NUCLEAR REGULATORY COMIVllSSION WASHINGTON, D.C. 20555 October 15, 1992 Docket No. 50-387 Hr. Harold M. Keiser Senior Vice President-Nuclear Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101
Dear Hr. Keiser:
SUBJECT:
SAFETY EVALUATION OF THE PENNSYLVANIA POWER AND LIGHT TECHNICAL SAFETY ASSESSMENT OF FEEDWATER LOCATION X-175, SUS(UEHANNA STEAM ELECTRIC STATION, UNIT 1 (TAC NO. H83987)
As a result of nondestructive examinations performed during the sixth refueling and inspection
- outage, Pennsylvania Power and Light Company (PP&L) discovered that significant erosion/corrosion had occurred in a section of feedwater piping in the Susquehanna Steam Electric Station, Unit 1.
The erosion/corrosion occurred in a section of the feedwater piping with component designation X-175.
This component is located inside containment, on a
straight length of 12" pipe just downstream of a 20" x 12" tee, and is part of the reactor coolant pressure boundary.
The inspection data and subsequent evaluation indicated that the component could approach its minimum required wall thickness during the next operating cycle.
Prior to restarting the plant, the licensee performed a weld buildup of the component.
By correspondence dated June 17,
- 1992, the licensee submitted a Technical Safety Assessment for the feedwater piping X-175.
This Technical Safety Assessment was submitted by PPEL at the request of Region I and the Office of Nuclear Reactor Regulation in order to demonstrate that X-175 would maintain its structural integrity until the next refueling and inspection
- outage, since the piping component was predicted to be below the code minimum wall thickness at the end of the current operating cycle.
The staff requested the evaluation be performed without credit for the weld buildup since an overlay repair is not considered appropriate for degradation caused by erosion/corrosion.
The submittal provided the licensee's justification for continued operation (JCO) of the reactor to the next refueling outage (RIO 07).
Upon review of the licensee's Technical Safety Assessment, that the licensee has provided a reasonable assurance that would maintain its structural integrity during the current The staff, therefore, finds the licensee's JCO acceptable.
the staff finds component X-175 operating cycle.
According to the 9210260170 921015 PDR ADOCK 05000387 P
PDR NIIC RLIE CKli<HR CSH'
Nr. Harold W. Keiser October 15, 1992 letter of June 17, 1992, the licensee has committed to repair component X-175 if the results of the RIO ¹7 inspections or predictions indicate that the component is. outside the minimum allowable wall thickness.
If the results of the RIO ¹7 inspections indicate that a repair of component X-175 is not warranted, the licensee has committed to submit the results of the evaluations to the NRC for review and approval, prior to restart of Unit 1.
The staff recommends that the disposition of component X-175 be made a restart item prior to resuming operation from RIO ¹7.
The staff's evaluation is enclosed.
Sincerely,
Enclosure:
Safety Evaluation cc w/enclosure:
See next page James J. Raleigh, Project Manager Project Directorate I-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation
Hr. Harold W. Keiser Pennsylvania Power 8 Light Company Susquehanna Steam Electric Station, Units 1
8 2
CC:
Jay Silberg, Esq.
- Shaw, Pittman, Potts 5 Trowbridge 2300 N Street N.W.
Washington, D.C.
20037 Bryan A. Snapp, Esq.
Assistant Corporate Counsel Pennsylvania Power h Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Hr. J.
H. Kenny Licensing Group Supervisor Pennsylvania Power
& Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Hr. Scott Barber Senior Resident Inspector U. S. Nuclear Regulatory Commission P.O.
Box 35 Berwick, Pennsylvania 18603-0035 Nr. Thomas M. Gerusky, Director Bureau of Radiation Protection Resources Commonwealth of Pennsylvania P.
O.
Box 2063 Harrisburg, Pennsylvania 17120 Hr. Jesse C. Tilton, III Allegheny Elec. Cooperative, Inc.
212 Locust Street P.O.
Box 1266 Harrisburg, Pennsylvania 17108-1266 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, Pennsylvania 19406 Hr. Harold G.'tanley Superintendent of Plant Susquehanna Steam Electric Station Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Hr. Herbert D. Woodeshick Special Office of the President Pennsylvania Power and Light Company Rural Route 1,
Box 1797 Berwick, Pennsylvania 18603 Hr. Robert G.
Byram Vice President-Nuclear Operations Pennsylvania Power and Light Company 2 North Ninth Street Allentown, Pennsylvania 18101