ML18153B870
| ML18153B870 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 08/29/1989 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML18151A407 | List: |
| References | |
| 89-636, NUDOCS 8909050406 | |
| Download: ML18153B870 (2) | |
Text
I
., ~-
e e
VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 August 29, 1989 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT NO. 2 INSERVICE INSPECTION PROGRAM RELIEF REQUEST FROM ASME SECTION XI HYDROSTATIC PRESSURE TEST 1 OCFR50.55a Serial No.89-636 NO/ISl:vlh Docket No.
50-281 License No. DPR-37 Pursuant to 1 O CFR 50.55a paragraph g(5), relief is requested from certain post replacement test requirements identified in ASME Section XI, 1980 Edition, Winter 1980 Addenda for one ASME Section XI Class 2 valve.
The following basis is provided.
. During the Surry Unit 2 refueling outage, an inspection was conducted on the valve internals of a 3 inch non-return valve, NRV-MS-202B. The valve was found to have an exposed sand inclusion in the valve body. Replacement of the valve was considered the most appropriate resolution to the problem.
IWA-5214 of ASME Section XI requires, following replacement welding, that a hydrostatic test (IWC-5222) be performed with a corresponding VT-2 examination on the affected area. As no intermediate isolation exists, the required test would place the "B" steam generator (2-RC-E-1 B) within the hydrostatic test boundary. Hydrostatic tests which include the steam generator are extremely difficult to perform and is considered impractical for this application.
It is proposed that a volumetric examination (RT) and a surface examination (PT) be performed on the new welds, as an alternative to the Code required hydrostatic test.
This alternative was previously requested on a similar application on February 13, 1987 and approved on June 17, 1988.
I
-~
..i.t I
The proposed alternative inspection will provide the necessary assurance of integrity intended by the Code. Acceptance of the request would be consistent with previous requests concerning nonisolable valves connected to the steam generators.
If you have any questions, please contact us.
Very truly yours, Wlst#
W. L. Stewart Senior Vice President - Power Enclosure cc:
U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W.
Suite 2900 Atlanta, Georgia 30323 Mr. W. E. Holland NRC Senior Resident Inspector Surry Power Station