ML20211K108
| ML20211K108 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 09/02/1999 |
| From: | Dick G NRC (Affiliation Not Assigned) |
| To: | Kingsley O COMMONWEALTH EDISON CO. |
| References | |
| GL-92-01, TAC-MA0527, TAC-MA0528, TAC-MA0530, NUDOCS 9909070106 | |
| Download: ML20211K108 (4) | |
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
'O WASHINGTON, D.C. 30eIM001 g * ***
September 2, 1999 Mr. Oliver D. Kingsley, President
. Nuclear Generation Group :
Commonwealth Edison Company Executive Towers West lil 1400 Opus Place, Suite 500 Downers Grove, IL 60515
SUBJECT:
RESPONSE TO THE REQUESTS FOR ADDIYlONAL INFORMATION TO GENERIC LETTER 92-01, REVISION 1, SUPPLEMENT 1 - BRAIDWOOD STATION, UNITS 1 AND 2, AND BYRON ETATION, UNIT 2 (TAC NOS.
MA0527, MA0528 AND MA0530)
Dear Mr. Kingsley:
On May 19,1995, the U.S. Nuclear Regulatory Commission (NRC) issued Generic Letter 92-01, Revision 1, Supplement 1 (GL), " Reactor Vesse! Structural Integrity," to holders of nuclear operating licenses. In issuing the GL the staff requested addressees to:
(1) identify, collect and report any new data pertinent to the analysis of structuralintegrity of the reactor pressure vessels (RPVs) at their nuclear plants, and
'L assess f5 impact of that data on their RPV integrity analyses relative to the requirements of Set.oons 50.60 and 50.61 to Part 50 of Title 10 of the Code of Federal Reaulations (10 CFR 50.60 and 10 CFR 50.61), and to the requirements of. Appendices G and H to Part 50 of Title 10 of the Code of Federal Reaulations (Appendices G and H to 10 CFR Part 50).
On August 17,1995, Commonwealth Edison Company (Comed) submitted its initial response to the GL and provided the requestad information relative the structural integrity assessments for Braidwood Station, Units 1 and 2, and Byron Station, Unit 2. The staff evaluated Comed's response to the GL and provided its conclusion relative to the response on August 29,1996.
However, since the time of the staff's closure letter, the Combustion Engineering (CE) Owners' Group and the Babcock and Wilcox (B&W) Owners' Group each have submitted additional data 1) regarding the alloying chemistries of beltline welds in CE and B&W fabricated vessels. The additional alloying data were submitted in Topical Reports CE NPSD-1039, Revision 2, CE NPSD 1119, Revision 1, for CE fabricated RPV welds, and BAW-2325, Revision 1, for B&W fabricated RPV welds, in addition, Chicago Bridge and Iron (CB&l) boiling water reactor data were submitted in Topical Report BWRVIP-46. As a result of the efforts by CE and B&W, the staff determined that additionalinformation was necessary relative to the structural integrity assessments for Braidwood, Units 1 and 2., and Byron 2. On June 1,1998, the staff issued a request for additionalinformation (RAI) in regard to the alloying chemistries of beltline welds,
/Oh Comed's assessment of surveillance data for the facilities, pressure-temperature (P-T) limits, and pressurized thermal shock (PTS) assessments for the plants. In general, with respect to
' the contents of the RAI, the staff requested that Comed reassess the alloying chemistries 9909070106 990902
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.O.D. Kingsley.
for the beltline welds and RPV surveillance welds relative to the chemistries provided in the applicable topical report, and provide the impact of any changes to the best-estimate chemistries for the beltline RPV welds on the structural integrity assessments for the facilities relative to 'he requirements of 10 CFR 50.60,10 CFR 50.61, a:
- Appendices G and H to 10 l
CFR Pact 50, as applicable to the licensing bases.
Comed provided its response to the staffs RAI for Braidwood and Byron 2 on September 3, 1998. As a result of the staffs review of the responses to GL 92-01, Revision 1; GL 92-01, Revision 1, Supplement 1; and the Supplement 1 RAI, the staff has revised the informJtion in the Reactor Vessel Integrity Database (RVID) and is releasing it as RVID Version 2.
The new database diskettes are posted on the world-wide-web at a location which is linked to j
the NRC home page (http://www.nrc. gov /NRR/RVID/index.html). We recommend that Comed j
review this information. If the staff does not receive comments by October 1,1999, we will assume that the data entered into the RVID are acceptable for the plants. No additional information is necessary with regard to the structural integrity assessments. Future submittals i
on P-T_ limits, PTS, or upper shelf energy should reference the most current information.
This closes the staffs efforts in regard to TAC Nos. MA0527, MA0528 and MA0530. The staff appreciates your efforts in regard to this matter.
Sincerely, j
Original Signed By George F. Dick, Jr., Project Manager, Section 2 Project Directorate ill Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. STN 50-455, STN 50-456, and STN 50-457 cc: See next page DISTRIBUTION Docket File PUBLIC PDill r/f OGC -
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O. Kingsley Byron /Braidwood Stations Common' wealth Edison Company cc:
Ms. C. Sue Hauser, Project Manager Attomey General Westinghouse Electric Corporation 500 S. Second Street Energy Systems Business Unit Springfield, Illinois 62701 Post Office Box 355 Pittsburgh, Pennsylvania 15230 lilinois Department of Nuclear Safety Office of Nuclear Facility Safety Joseph Gallo 1035 Outer Park Drive Gallo & Ross '
Springfield, Illinois 62704 1025 Connecticut Ave., N.W., Suite 1014 Washington, DC 20036 Commonwealth Edison Company Byron Station Manager Howard A. Leamer -
4450 N. German Church Road Environmental Law and Policy Byron, Illinois 61010-9794 Center of the Midwest 35 East Wacker Dr., Suite 1300 Commonwealth Edison Company Chicago, Illinois 60601 Site Vice President - Byron 4450 N. German Church Road U.S. Nuclear Regulatory Commission Byron, Illinois 61010-9794 Byron Resident inspectors Office 4448 N. German Church Road U.S. Nuclear ReCulatory Commission Byron, Illinois 61010-9750 Braidwood Resident inspectors Office RR 1, Box 79 Regional Administrator, Region ll1 Braceville, Illinois 60407 U.S. Nuclear Regulatory Commission 801 Warrenville Road Mr. Ron Stephens Lisle, Illinois 60532 4351 lilinois Emergency Services and Disaster Agency Ms. Lorraine Creek 110 E. Adams Street RR 1, Box 182 Springfield, Illinois 62706 Manteno, Illinois 60950 Chairman Chairman, Ogle County Board Will County Board of Supervisors Post Office Box 357 Will County Board Courthouse Oregon, Illinois 61061 Joliet, Illinois 60434 Mrs. Phillip B. Johnson Commonwealth Edison Company 1907 Stratford Lane Braidwood Station Manager Rockford, Illinois 61107 RR 1, Box 84 Braceville, Illinois 60407-9619 George L. Edgar Morgan, Lewis and Bochius 1800 M Street, N.W.
Washington, DC 20036
i O. Kingsley Byron /Braidwood Stations
- Commonwealth Edison Company
-2.
Ms. Bridget Little Rorem Commonwealth Edison Company Appleseed Coordinator Reg. Assurance Supervisor - Braidwood 117 N. Linden Street RR 1, Box 84 Essex, Illinois 60935 Braceville, Illinois 60407-9619 Document Control Desk-Licensing Commonwealth Edison Company Commonwealth Edison Company Reg. Assurance Supervisor-Byron 1400 Opus Place, Suite 400 4450 N. German Church Road Downers Grove, Illinois 60515 Byron, Illinois 61010-9794 Commonwealth Edison Company Ms. Pamela B. Stroebel Site Vice President - Braidwood Senior Vice President and General Counsel RR 1, Box 64
' Commonwealth Edison Company Braceville, Illinois 60407-9619 P.O. Box 767 Chicago, Illinois 60690-0767 Mr. David Helwig Senior Vice President Commonwealth Edison Company Executive Towers West lli 1400 Opus Place, Suite 900 Downers Grove, Illinois 60515 Mr. Gene H. Stanley PWR Vice President Commonwealth Edison Company Executive Towers West lll 1400 Opus Place, Suite 900 Downers Grove, Illinois 60515 Mr. Christopher Crane BWR Vice President Commonwealth Edison Company Executive Towers West til 1400 Opus Place, Suite 900 Downers Grove, Illinois 60515 Mr. R. M. Krich Vice Presdient - Regulatory Services Commonwealth Edison Company Executive Towers West til 1400 Opus Place, Suite 500 Downers Grove,lilinois 60515 l
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