ML18153A350
| ML18153A350 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 12/23/1997 |
| From: | Edison G NRC (Affiliation Not Assigned) |
| To: | Saunders R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| TAC-MA0125, TAC-MA125, NUDOCS 9801120172 | |
| Download: ML18153A350 (5) | |
Text
e UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 December 23, 1997 Mr. R. F. Saunders Vice President - Nuclear Engineering and Services Virginia Electric and Power Company Richmond, Virginia 23261 5()-$0
SUBJECT:
SURRY UNIT 1 - RISK-INFORMED INSERVICE INSPECTION PILOT PROGRAM (TAC NO. MA0125)
Dear Mr. Saunders:
We are responding to your October 31, 1997, letter which enclosed the Risk-Informed lnservice Inspection (RI-ISi) pilot program submittal that requested NRC approval for the implementation of the program at Surry Unit 1. The NRC staff is also reviewing the revised version of the WOG Topical Report (WCAP-14572, Revision 1) which was received in a letter.
from the WOG to NEI dated October 9, 1997.
The staff has conducted a preliminary review of the Surry 1 RI-ISi pilot program submittal.
The staff has determined that more information in several areas of the submittal is needed, and we request you provide the information described in the enclosure in order for the staff to continue its review in a timely fashion.
We are developing a comprehensive plan for the overall review of RI-ISi pilot submittals, including the review and approval schedule for Surry Unit 1 and submittals expected subsequent to the pilot RI-ISi program approvals. The plan will be developed consistent with the NRC strategic and operating plans for Fiscal Year 1997 to Fiscal Year 2002. In order to assist in the development of this plan, we would appreciate your informing us of when you expect to respond to the attached request for additional information. We will then complete our integrated plan and provide you with an estimated review schedule for the Surry Unit 1 pilot program submittal. Also, once the integrated plan has been developed, the staff will meet with industry representatives and the public to discuss the proces$ c;1nd schedule for the review of RI-ISi submittals.
- 9801120172 971223 --- ---- ---~\\
PDR ADOCK 05000280 1
Q PDR I llllll lllll lllll llllll 11111111111111111 :
- &'&3C7F*
- We appreciate the efforts of Virginia Electric and Power Company and your willingness to participate as a pilot plant application for the RI-ISi program. If you have any further questions, please call me at 301 415-1448.
Docket No. 50-280
Enclosure:
As stated Distribution i:::l)o-cRet-=Rile:.-"'""
PUBLIC PDll-1 RF B. Boger OGC ACRS S. Ali, ECGB S. Dinsmore, SPSS J. Guttman D. Jackson J. Johnson, RII FILENAME - G:\\SURRY\\MA0125.RIP OFFICE PM:PDll-1 LA:PDll-1 NAME GEdison DATE COPY Sincerely, (Original Signed By)
Gordon E. Edison, Sr. Project Manager Project Directorate 11-1 Division of Reactor Projects 1/11 Office of Nuclear Reactor Regulation Yes/No
Virginia Electric and Power Company cc:
Mr. Michael W. Maupin. Esq.
Hunton and Williams Riverfront Plaza. East Tower 951 E. Byrd Street Richmond. Virginia 23219 Mr. David Christian. Manager 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 e
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 Electric and Power Company 5000 Dominion Blvd.
Glen Allen. Virginia 23060 Mr. J. P. O'Hanlon Senior Vice President - Nuclear Virginia Electric and Power Company Innsbrook Technical Center 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. Manager North Anna Power Station P. 0. Box 402 Mineral. Virginia 23117
e REQUEST FOR ADDITIONAL INFORMATION The NRC staff has conducted a preliminary review of the Pilot Program of Risk-informed lnservice Inspection (RI-ISi), which was submitted by Surry Unit 1 on October 31, 1997. Our review indicated that information in several areas was not submitted per the guidance provided in RG-1061 and DG-1063. Please provide the following information for the staff to continue its review.
- 1.
Provide the results of probability risk assessment (PRA) calculations used to develop the pipe segment ranking and estimate the change in risk due to implemention of the program. Also, provide the input and output of the SRRA program which develops the pipe failure frequency or probability as appropriate to the consequence model. A discussion of specific elements to be submitted can be found on page 49 of the Draft Regulatory Guide DG-1063. Submittal of the quantitative PRA and pipe failure information on a computer diskette, in addition to the hard copy, will greatly expedite the review.
- 2.
Provide a discussion of the proposed monitoring and corrective action programs as described in Section 5.3 of the draft regulatory guide. The submittal should be specific enough to allow a staff review to determine whether the monitoring and corrective action program is adapted to plant-specific ISi program changes.
- 3.
Address the following items as described in "areas of review" specified in the draft Safety Review Plan (SRP) 3.9.8, Subsection 1.2.1.
Traditional engineering analysis is needed to assess whether the impact of the proposed ISi program changes are consistent with the principles of defense-in-depth.
Adequate safety margins are maintained.
The ISi Program changes meet or exceed the intent of ASME BPVC Code Section XI.
There is no adverse impact to the augmented inspection programs, such as those for intergranul~r stress corrosion cracking (IGSCC) and erosion/corrosion.
Provide a description of such an engineering analysis method and the procedures used, and a summary of the analysis results. Explain how the SRP goals stated above a-re met.
- 4.
Provide the implementation and monitoring program, which is an integrated part of the RI-ISi Program. As described in the draft SRP, the program should include performance-monitoring strategies, inspection methods and acceptance guidelines, Enclosure
~--~------
e inspection result evaluation strategies, circumstances for corrective actions, documentation requirements, administrative control, and quality control requirements to ensure meeting Appendix B to 10 CFR Part 50.
- 5.
According to Subsection 11.2.3.1 of SRP 3.9.8, sensitivity studies should be performed which identify the impact of highly uncertain PRA modeling assumptions and techniques, and the rankings adjusted to minimize the influence of these assumptions on the classification. Verify that sensitivity studies were done, and provide a description of the studies with a summary of results.