ML18149A175
| ML18149A175 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 06/06/1986 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Rubenstein L Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML18130A421 | List: |
| References | |
| 86-310, TAC-61696, NUDOCS 8606100102 | |
| Download: ML18149A175 (2) | |
Text
C VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 W. L.STEW~T VICE PRESIDENT NUCLEAR OPERATIONS June 6, 1986 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation Attn:
Mr. Lester S. Rubenstein, Director PWR Project Directorate No. 2 Division of PWR Licensing-A U.S. Nuclear Regulatory Commission Washington, D.C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT NO. 1 RELIEF REQUEST FROM ASME XI HYDROSTATIC TEST Serial No.86-310 NO/JDH/acm Docket No.
50-280 License No. DPR-32 Surry Power Station Unit No. 1 has performed a valve replacement within a system boundary designated as ASME Class 2 during the current refueling outage (currently scheduled 5/9/86-6/26/86).
Pursuant to 10 CFR 50.55a paragraph g(5), relief is requested from certain post replacement test requirements delineated in ASME Sectfon XI, 1980 edition, Winter 1980 addenda.
Specifically, we have replaced one 1-1/2 inch socket welded drain valve (1-MS-268) just upstream of the main steam trip valve for the B Steam Generator (see attached drawing).
Replacement of this valve has been necessary due to the harsh environment which causes erosion/corrosion on the valve seat surface.
The valve's external pressure boundary remains unaffected.
Replacement only enhances operational capabilities at the station.
As shown in the attached drawing, the required hydrostatic test (IWA 5214) would require including the B Steam Generator and a considerable portion of attached main steam piping within the test boundary.
This type test is considered impractical, when compared to the actual integrity assurance gained from the inspection.
Alternatively, it is proposed that a surface examination (MT or PT) be substituted prior to start-up. Additionally, a visual (VT-2) examination in conjunction with a system inservice pressure test (IWC-5221) will be conducted during the start-up following the refueling outage.
This request is similar to a previous relief request dated February 1, 1985 (Serial No.85-018) for a similar valve replacement at Surry Power Station Unit No. 1 which was approved by NRC on April 11, 1985.
8606100102 860606 PDR ADOCK- 05000280 p
PDR I
e VIRGINIA ELECTRIC AND POWER COMPANY TO Harold R. Denton We anticipate that other, similar valve replacements, in addition to 1-MS-268, may be required during the present Unit 1 outage.
However*,
identification of any additional valves is dependent upon trouble-shooting efforts which are conducted during the outage.
We will notify you immediately if any additional valve replacements should be included within the scope of this request.
In summary, we believe that the proposed alternative the necessary inspection intended by the code justification for relief has been provided.
If you require additional information, please contact us.
examinations provide and that adequate have any question or In accordance with 10 CFR 170, an Application Fee of $150 is enclosed.
Very truly,yours,
~~
W. L. Stewart Attachments cc:
Dr. J. N~lson Grace Regional Administrator NRC Region II NRC Senior Resident Inspector Surry Power Station