ML072890664
| ML072890664 | |
| Person / Time | |
|---|---|
| Site: | Millstone, Surry, North Anna  |
| Issue date: | 11/01/2007 |
| From: | Richard Jervey NRC/NRR/ADRO/DORL/LPLII-1 |
| To: | |
| Jervey, Richard 301-415-2728 | |
| Shared Package | |
| ML072831359 | List: |
| References | |
| GSI-191 | |
| Download: ML072890664 (6) | |
Text
November 1, 2007 LICENSEE:
FACILITY:
NORTH ANNA POWER STATION, UNIT NOS. 1 AND 2 (NORTH ANNA),
SURRY POWER STATION, UNIT NOS. 1 AND 2 (SURRY) AND MILLSTONE POWER STATION, UNIT NOS. 2 AND 3 (MILLSTONE)
SUBJECT:
SUMMARY
OF THE OCTOBER 11, 2007, PUBLIC MEETING WITH DOMINION NUCLEAR REGARDING CHEMICAL TESTING METHODS RELATED TO GSI-191 On October 11, 2007, the U.S. Nuclear Regulatory Commission (NRC) staff participated in a public meeting (announcement available in the Agencywide Documents Access and Management System (ADAMS) under accession number ML072690015) with Dominion Nuclear, et al., representing North Anna, Surry (Virginia Electric Power Co. (Dominion)),
Millstone (Dominion Nuclear Connecticut), and their vendor, Atomic Energy of Canada Limited (AECL), to discuss methods for testing of chemical effects expected during recirculation as identified in GSI-191, Generic Safety Issue (GSI), GSI-191, Assessment of Debris Accumulation On PWR [Pressurized Water Reactor] Sump Performance. The meeting took place at the NRC headquarters in Rockville, Maryland.
After introductory comments from Richard Jervey, and Michael Scott of the NRC followed by Kerry Basehore of Dominion, the presentation was started. Dave Guzonas of AECL presented the slides/handout describing proposed methods of testing to resolve concerns regarding chemical effects assumptions as pertain to Millstone, Surry and North Anna. (ADAMS ML073040033)
In summary, the basis for the Dominion-AECL proposed testing methods were discussed, leading to questions by NRC staff regarding the adequacy of benchtop testing for precipitates.
The question of the need to perform pump head loss testing following the results of the precipitate testing was discussed. The NRC staff identified that there would be considerable interest and concern if head loss testing was not performed.
This business was concluded and the public was asked for comments or input. There were no comments.
An additional item was brought up by Dominion at this time, in relation to the GSI-191 sump modifications planned to be installed during the upcoming Surry Unit 1 outage. This was apparently an emergent concern identified on October 10, 2007, and thus not identified beforehand.
Dominion Nuclear, et al.
The Dominion staff asked for input regarding possible license actions needed to address a potential limitation of the Surry Units 1 and 2 modified sump design as presently modeled in the Dominion Topical Report, DOM-NAF-3, Rev 0.0, dated September 2006. In one pipe-break scenario, the dynamic effects inside the strainer led to steam flashing and reduced pump suction head. Due to assumptions made in the GOTHIC code the energy released by the core in the event is assumed to be transferred 100% to the sump, which in the Surry Units 1 and 2 model is not considered realistic, and thus the analysis provides overly conservative results leading to the postulated suction head loss. The question posed by Dominion was if the appropriate approach to resolution was with a change to the topical report, or the consideration of a license amendment to address the use of the topical report and its role in the license basis for the Surry Units 1 and 2. Although the issue was briefly discussed, the NRC staff limited comments to the use of a license amendment process versus a change to the topical report as practical measures to address the issue. The Dominion representatives left the discussion stating that they would contact NRC staff to address the issue as soon as they could plan for the best approach to resolution.
The public was asked for comments at this time. There were no comments and the meeting was adjourned.
The following is a list of the meeting participants:
NAME AFFILIATION*
Marty Legg Dominion Mary Shipley Duke Jeff Nolin Duke Marwan Charrouf MPR Assoc.
Gary Miller Dominion Steve Smith NRC Michael Scott NRC Matt Yoder NRC Allen Hiser NRC Michael Henig Dominion Addison Hall Dominion Rick Jervey NRC Paul Klein NRC John Lehning NRC Emma Wong NRC David Guzonas AECL John Butler NEI Kerry Basehore Dominion Deann Raleigh LIS, Scientech E.C. Marinos NRC
- as recorded on the attendance roster (see ML073040030)
Dominion Nuclear, et al.
No public meeting feedback forms were submitted at the conclusion of the meeting. Please direct inquiries to me at 301-415-2728, or raj@nrc.gov.
/RA/
R. A. Jervey, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-338, 50-339, 50-280, 50-281, 50-336 and 50-423 cc: See next page
Dominion Nuclear, et al No public meeting feedback forms were submitted at the conclusion of the meeting. Please direct inquiries to me at 301-415-2728, or raj@nrc.gov.
/RA/
R. A. Jervey, Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-338, 50-339, 50-280, 50-281, 50-336 and 50-423 cc: See next page DISTRIBUTION:
PUBLIC LPL2-1 R/F RidsNrrPMSLingam RidsNrrPMRJervey M. Yoder EWong, NRR RidsNrrLAMOBrien P. Klein RidsOgcMailCenter S. Campbell, EDO T. Liu, NRR RidsNrrPMSJHughey RidsNrrDorlLPL2-1 (EMarinos)
J. Lehning Smith, NRR RidsNrrDssSsib (MScott)
RidsNrrDciCsgb (AHiser)
RidsNrrLAABaxter RidsAcrsAcnwMailCenter RidsRgn2MailCenter (EGuthrie)
Package Accession No. ML072831359 Meeting Summary No. ML072890664 Slides/handout No. ML073040033 Roster No. ML073040030 OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/LPL2-1/BC NAME RJervey:nc MOBrien EMarinos DATE 10/31/07 10/31/07 11/1/07 OFFICIAL RECORD COPY
North Anna Power Station, Units 1 & 2 Surry Power Station, Units 1 & 2 cc:
Mr. David A. Christian President and Chief Nuclear Officer Virginia Electrical and Power Company Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711 Ms. Lillian M. Cuoco, Esq.
Senior Counsel Dominion Resources Services, Inc.
Building 475, 5th Floor Rope Ferry Road Waterford, Connecticut 06385 Mr. Donald E. Jernigan Site Vice President Surry Power Station Virginia Electric and Power Company 5570 Hog Island Road Surry, Virginia 23883-0315 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 Post Office Box 1197 Richmond, Virginia 23218 Dr. Robert B. Stroube, MD, MPH State Health Commissioner Office of the Commissioner Virginia Department of Health Post Office Box 2448 Richmond, Virginia 23218 Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. Chris L. Funderburk, Director Nuclear Licensing & Operations Support Dominion Resources Services, Inc.
Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060-6711 Mr. Daniel G. Stoddard Site Vice President North Anna Power Station Virginia Electric and Power Company Post Office Box 402 Mineral, Virginia 23117-0402 Senior Resident Inspector North Anna Power Station U. S. Nuclear Regulatory Commission P. O. Box 490 Mineral, Virginia 23117 Mr. C. Lee Lintecum County Administrator Louisa County Post Office Box 160 Louisa, Virginia 23093
Millstone Power Station, Unit Nos. 2 and 3 cc:
Edward L. Wilds, Jr., Ph.D.
Director, Division of Radiation Department of Environmental Protection 79 Elm Street Hartford, CT 06106-5127 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 First Selectmen Town of Waterford 15 Rope Ferry Road Waterford, CT 06385 Charles Brinkman, Director Washington Operations Nuclear Services Westinghouse Electric Company 12300 Twinbrook Pkwy, Suite 330 Rockville, MD 20852 Senior Resident Inspector Millstone Power Station c/o U.S. Nuclear Regulatory Commission P. O. Box 513 Niantic, CT 06357 Mr. J. W. "Bill" Sheehan Co-Chair NEAC 19 Laurel Crest Drive Waterford, CT 06385 Ms. Nancy Burton 147 Cross Highway Redding Ridge, CT 00870 Mr. Evan W. Woollacott Co-Chair Nuclear Energy Advisory Council 128 Terrys Plain Road Simsbury, CT 06070 Mr. Joseph Roy Director of Operations Massachusetts Municipal Wholesale Electric Company P.O. Box 426 Ludlow, MA 01056 Mr. David W. Dodson Licensing Supervisor Dominion Nuclear Connecticut, Inc.
Building 475, 5th Floor Roper Ferry Road Waterford, CT 06385 Mr. J. Alan Price Site Vice President Dominion Nuclear Connecticut, Inc.
Building 475, 5th Floor Rope Ferry Road Waterford, CT 06385