ML031120387
| ML031120387 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 04/10/2003 |
| From: | Hartz L Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 03-227 | |
| Download: ML031120387 (5) | |
Text
VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 April 10, 2003 United States Nuclear Regulatory Commission Serial No.03-227 Attention: Document Control Desk NL&OS/GDM RO Washington, D. C. 20555 Docket Nos.
50-280 License Nos.
DPR-32 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT 1 ASME SECTION Xl INSERVICE INSPECTION PROGRAM RELIEF REQUEST CMP-28, REVISION 1 EXTENSION OF REACTOR VESSEL INSPECTION SCHEDULE In a letter dated September 30, 2002 (Serial No.02-576), Virginia Electric and Power Company (Dominion) requested relief to extend the inspection interval for performing the Surry Unit 1 reactor vessel examinations beyond the one-year Code allowable extension to coincide with the Fall 2004 refueling outage.
While this relief is still desired, the basis for the relief request has changed slightly due to the recent company decision to replace the Surry Unit 1 reactor vessel head during the upcoming Spring 2003 refueling outage. Consequently, the previously submitted Relief Request CMP-28 has been revised to reflect this change, and the revised relief request is provided in the attachment.
Relief Request CMP-28, Revision 1, supercedes in its entirety Relief Request CMP-28 and has been approved by the Station Nuclear Safety and Operating Committee. Approval of Relief Request CMP-28, Revision 1, is requested pursuant to the provisions of 10 CFR 50.55a(a)(3)(ii).
If you have any questions or require additional information, please contact us.
Very truly yours, Leslie Hartz Vice President - Nuclear Engineering Attachment Commitments made in this letter: None
cc:
U. S. Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center Suite 23T85 61 Forsyth St., S.W.
Atlanta, Georgia 30303-8931 Mr. R. A. Musser NRC Senior Resident Inspector Surry Power Station Mr. R. Smith Authorized Nuclear Inspector Surry Power Station
Attachment Relief Request CMP-28. Revision 1 Extension of Reactor Vessel Inspection Schedule Surrv Power Station Unit 1 Virginia Electric and Power Company (Dominion)
Relief Request CMP-28 Rev. 1 Surrv Power Station Unit 1 Reactor Vessel Insnection Extension Identification of Components Categorv Item Description B-A B1.11 Circumferential Shell Weld B-A B1.12 Longitudinal Shell Weld B-A B1.30 Shell-to-Flange Weld B-D B3.90 Nozzle-to-Vessel Weld B-D B3.100 Nozzle Inside Radius Weld B-G-1 B6.40 Flange Threads B-N-1 B1 3.10 Reactor Vessel Internals B-N-2 B13.50 Interior Attachments Within Beltline B-N-2 B13.60 Interior Attachments Beyond Beltline B-N-3 B13.70 Removable Core Support Structure R-A R1.11 Dissimilar Metal NPS 4 or larger Code Requirements Surry Unit 1 currently conducts inservice inspection examinations in accordance with the requirements of the 1989 edition of ASME Section Xl. Subparagraph IWA-2430(a) states, "The inservice examinations and system pressure tests required by IWB, IWC, IWD, and IWE shall be completed during each of the inspection intervals for the service lifetime of the power unit." Subparagraph (d) states, "For components inspected under Program B, each of the inspection intervals may be extended or decreased by as much as 1 year. Adjustments
shall not cause successive intervals to be altered by more than 1 year from the original pattern of intervals."
Ill.
Basis for Relief Currently, Surry Power Station Unit 1 is in the third period of the third 10-year inservice inspection interval. The end date for the interval is October 13, 2003.
As allowed by ASME Section Xl, Virginia Electric and Power Company (Dominion) was planning to use the one-year extension noted in Section II above to complete the third interval during the Fall 2004 refueling outage. This outage was not expected to exceed the one-year extension; consequently, it was not anticipated that Code relief would be required.
However, due to recent industry events and plant reactor vessel head inspections, Dominion is now planning to replace the Surry Unit 1 reactor vessel head during the Spring 2003 (Cycle 18) refueling outage.
Consequently, the refueling outage schedule for Surry Unit 1 has been extended and the Fall 2004 outage start date has moved beyond the one year grace period. Relief is now required to perform the third interval reactor vessel examinations beyond the Code allowable one-year extension period but no later than December 31, 2004.
The fourth inservice inspection interval start date will remain as October 14, 2003.
Previous 10-year reactor vessel exams were completed on February 1, 1994.
Considering the Code allowed one-year extension, the time between successive exams (February 1, 1994 to December 31, 2004) will still be less than the eleven years allowed by the Code. Therefore, performing the examinations during the Fall 2004 refueling outage will continue to ensure that the reactor vessel will be inspected within the time frame allowed by the ASME Code. If relief were not granted, the unit would have to be taken off line earlier than necessary to perform the reactor vessel inservice examinations. Consequently, performing the reactor vessel examinations at the Code required frequency discussed in Section II above is considered a hardship without any compensating increase in quality or safety.
IV.
Alternate Provisions Relief is requested pursuant to 10 CFR 50.55a(a)(3)(ii) to permit the proposed alternative of extending the time frame for performing the Surry Unit 1 reactor vessel examinations beyond the one-year Code allowable extension date of October 13, 2004, but no later than December 31, 2004.