ML18152B587
| ML18152B587 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 12/16/1998 |
| From: | Berkow H NRC (Affiliation Not Assigned) |
| To: | Ohanlon J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| Shared Package | |
| ML18152B588 | List: |
| References | |
| FACA, TAC-MA0125, TAC-MA125, NUDOCS 9812280274 | |
| Download: ML18152B587 (4) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 December 16, 1998
- Mr. J.P. O'Hanlon Senior Vice President - Nuclear Virginia Electric and Power Company 5000 Dominion Blvd.
Glen *Allen, Virginia 23060
SUBJECT:
REQUEST TO USE CODE CASE N-577 AS AN ALTERNATIVE TO THE REQUIREMENTS OF ASME CODE SECTION XI AT SURRY UNIT 1 (TAC NO. MA 0125)
Dear Mr. O'Hanlon:
By letters dated October 31, 1997, June.18, August 13, and October 20, 1998, you requested that the NRC approve ASME Code Case N-577, "Risk-Informed Requirements for Class 1, 2,
- and 3 Piping, Method A," with the more detailed provisions in WCAP-14572, as an alternative to the Code examination requirements for piping systems for Surry Unit 1. The ASME Code currently requires you to perform lnservice Inspection (ISi) of Code Category B-J aild C-F p.iping welds during successive 10-year intervals. Your proposed risk-informed ISi program is based on (1) ASME Code Case N-577, (2) WCAP-14572, Revision 1, 'Westinghouse Owners Group Application of Risk-Informed Methods to Piping lnservice Inspection Topical Report," and (3) WCAP-14572, Revision 1, Supplement 1, 'Westinghouse Structural Reliability and Risk Assessment (SRRA) Model for Piping Risk-Informed lnservice Inspection."
We have reviewed your proposed request as a site-specific request applicable only to Surry Unit 1. The results of our review indicate that you have provided an acceptable alternative to the requirements of ASME Code Section XI and have shown that implementation of the program would result in an insignificant change in risk even with fewer inspections, because the inspections will take place where degradation mechanisms are more likely to occur, and procedures and personnel will target these locations using improved techniques and expanded volumes. We*have determined that the alternative method described in your proposal provides equiv~lent or better examination criteria than those provided by the current Section XI requir~ments.
We therefore conclude that authorization of your proposed alternative would provide an acceptable level of quality and safety. Pursuant to 1 O CFR 50.55(a)(3)(i), the alternative is authorized. This authorization does not constitute NRC approval of Code Case N-577 for generic us_e. The suitability of Code Case N-577 for generic use will be determined following the staff's review of the Code case. It is expected that the results of the staff's review will be
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J. P. O'Hanlon December 16, 1998 documented in Regulatory Guide 1.147, "lnservice Inspection Code Case Acceptability -
ASME Section XI Division 1."
Our detailed evaluation and conclusions are documented in the enclosed Safety Evaluation.
Docket No. 50-280
Enclosure:
Safety Evaluation cc w/encl: See next page E. Dunnington Sincerely, ORIGINAL SIGNED BY:
Herbert N. Berkow, Director Project Directorate 11-2 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation Distribution:
-Docket File PUBLIC H. Berkow G. Hill (2)
J. Zwolinski G. Bagchi W. Beckner G. Edison S. Dinsmore OGC S. Hou L. Plisco, RII e-mail TLH-3 (SE only)
To receive a copy of this document, indicate in t "C" = Copy without attachment/enclosure "E" = Co with attach ent/enclosure "N" = N c I /97
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J.P. O'Hanlon documented in Regulatory Guide 1.147, "lnservice Inspection Code Case Acceptability -
ASME Section XI Division 1."
Our detailed evaluation and conclusions are documented in the enclosed Safety Evaluation.
Docket No. 50-280
Enclosure:
Safety Evaluation cc w/encl: See next page Sincerely, rbert N. Berkow, Director Project Directorate 11-2 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation
Mr. J.P. O'Hanlon Virginia Electric and Power Company cc:
Mr. Donald P. Irwin, Esq.
Hunton and Williams Riverfront Plaza, East Tower 951 E. Byrd Street Richmond, Virginia 23219 Mr. E. S. Grecheck Site Vice President Surry Power Station Virginia Electric and Power Company 5570 Hog Island Road Surry, Virginia 23883 Senior Resident Inspector Surry Power Station U.S. Nuclear Regulatory Commission 5850 Hog Island Road Surry, Virginia 23883 Chairman Board of Supervisors of Surry County Surry County Courthouse Surry, Virginia 23683 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation P. 0. Box 1197 Richmond, Virginia 23209 Regional Administrator, Region II U.S. Nuclear Regulatory Commission Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303 Robert B. Strobe, M.D., M.P.H.
State Health Commissioner Office of the Commissioner Virginia Department of Health P.O. Box 2448 Richmond, Virginia 23218 Surry Power Station Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. J. H. McCarthy, Manager Nuclear Licensing & Operations Support Innsbrook Technical Center Virginia E;lectric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060 Mr. R. C. Haag U.S. Nuclear Regulatory Commission Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, Georgia 30303 Mr. W.R. Matthews Site Vice President North Anna Power Station Virginia Electric and Power Company P. 0. Box402 Mineral, Virginia 23117