ML20216B648
| ML20216B648 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood  |
| Issue date: | 05/12/1998 |
| From: | Stewart Bailey NRC (Affiliation Not Assigned) |
| To: | Kingsley O COMMONWEALTH EDISON CO. |
| References | |
| TAC-M97315, TAC-M97316, TAC-M97317, TAC-M97318, NUDOCS 9805180308 | |
| Download: ML20216B648 (5) | |
Text
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UNITED STATES 3l j
NUCLEAR REGULATORY COMMISSION o
WASHINGTON, D.C. 30666-0001 May 12,1998 Mr. Oliver D. Kingsley, President Nuclear Generation Group Commonwealth Edison Company Executive Towers West til 1400 Opus Place, Suite 500 Downers Grove,IL 60515
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING THE REVISED STEAM GENERATOR TUBE RUPTURE ANALYSIS - BYRON AND BRAIDWOOD STATIONS (TAC NOS. M97315, M97316, M97317 AND M97318)
Dear Mr. Kingsley:
By letter dated November 13,1996, Commonwealth Edison Company (Comed) submitted a revised steam generator tube rupture (SGTR) analysis for Byron Station, Units 1 and 2, and Braidwood Station, Units 1 and 2. The analysis was revised to account for physical differences i
between the original steam generators and the replacement steam generators on Byron, Unit 1, and Braidwood, Unit 1, and associated changes in certain operator actions. Additional information was provided by letters dated March 20, June 2, August 19, November 3 and December 19,1997, and April 13,1998.
During the course of our review, we have identified the need for further information. Your letter dated November 3,1997, states that the auxiliary feedwater (AFW) flow rate used in the analysis for margin to overfill (MTO)is nonconservative. The analysis assumes the maximum AFW flow is 464 gpm, including uncertainties. The letter also states that Comed has performed an operability evaluation which concludes that Byron and Braidwood are still in compliance with the licensing requirements for mitigation of a SGTR. The letter further states that for Byron, Unit 1, and Braidwood, Unit 1, modifications will be performed during the steam generator replacement outages (B1R08 and A1R07, respectively) to limit the AFW flow to 464 gpm (for Byron, Unit 1, this was scheduled for fall 1997). Finally, the letter states "[p]lans for Byron, Unit 2, and Braidwood, Unit 2, will be dispositioned in refueling outages B2R08 and A2R07, respectively."
0 The safety evaluation for the revised SGTR analysis for Byron, Unit 1, and Braidwood, Unit 1, covering the plant conditions after steam generator replacement, was sent to Comed by letter dated January 28,1998, as supplemented by letter dated March 11,1998. This safety evaluation was based, in part, on a maximum AFW flow of 464 gpm, which is consistent with your stated corrective actions for those units.
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9 O. Kingsley May 12,1998 i
Please describe the corrective actions you plan to take, including schedule, to restore consistency between the AFW flow and the SGTR analysis for Byron, Unit 2, and Braidwood, Unit 2.
Your response is requested within 30 days of the date of this letter.
Sincerely, ORIG. SIGNED BY Stewart N. Bailey, Project Manager Project Directorate 111-2 Division of Reactor Projects - Ill/lV j
Office of Nuclear Reactor Regulation Docket Nos. STN 50-454, STN 50-455, STN 50-456, STN 50-457 cc: See next page Distribution:
Docket File PUBLIC PDlll 2 r/f E. Adensam, EGA1 S. Richards C. Moore S. Bailey i
J. Hickman OGC,015818 ACRS, T2E26 M. Jordan, Rll_1 DOCUMENT NAME:G:\\CMNTSP\\ BRAID-BY\\BB97315.RAI Ta r*ceive e copy of thle document, indicatAthe tpx: "C" = Copy without enclosures "E" = Copy with enclosures "N" = No copy OFFICE PM:PDill-2 l6
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D:PDill-2 lC NAME SBAILEY<C(M dMdONE JHICKMAN f## SRICHARDS +@
05/ x /98 05/{1_/98 05/1 2 /98 "
05/ /}/98 DATE f
OFFICIAL RECORD COPY
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O. Kingsley 3 Please describe the corrective actions you plan to take, including schedule, to restore consistency between the AFW flow and the SGTR analysis for Byron, Unit 2, and Braidwood, Unit 2.
Your response is requested within 30 days of the date of this letter.
Sincerely, 1
Stewart N. Bailey, Manager Project Directorate lil-2 1
Division of Reactor Projects - lilllV l
Office of Nuclear Reactor Regulation Docket Nos. STN 50-454, STN 50-455, STN 50-456, STN 50-457 cc: See next page 1
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j O. Kingsley Byron /Braidwood Stations Commonwealth Edison Company cc:
Ms. C. Sue Hauser, Project Manager George L. Edgar Westinghouse Electric Corporation Morgan, Lewis and Bochius Energy Systems Business Unit 1800 M Street, N.W.
Post Office Box 355 Washington, DC 20036 Pittsburgh, Pennsylvania 15230 t
Attomey General Joseph Gallo 500 S. Second Street Gallo & Ross Springfield, Illinois 62701 t
1250 Eye St., N.W., Suite 302 Washington, DC 20005 lilinois Department of Nuclear Safety Office of Nuclear Facility Safety Michael I. Miller, Esquire 1035 Outer Park Drive Sidley and Austin Springfield, Illinois 62704 One First National Plaza Chicago, Illinois 60603 Commonwealth Edison Company Byron Station Manager Howard A. Leamer 4450 N. German Church Road Environmentallaw 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 Regulatory Commission Byron, Illinois 61010-9750 Braidwood Resident inspectors Office RR 1, Box 79 Regional Administrator, Region 111 Braceville, Illinois 60407 U.S. Nuclear Regulatory Commission 801 Warrenville Road Mr. Ron Stephens Lisle, Illinois 60532-4351 lilinois Emergency Services and Disaster Agency q
Ms. Lorraine Creek 110 E. Adams Street RR 1, Box 182 Springfield, Illinois 62706 Manteno, Illinois 60950 Chairman Chairman, Ogle County Board W'" Jounty 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
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l O. Kings!cy Commonwealth Edison Company Byron /Braidwood Stations Ms. Bridget Uttle Rorem Ms. Irene Johnson, Ucensing Director i
Appleseed Coordinator Nuclear Regulatory Services 117 N. Unden Street Commonwealth Edison Company I
Essex, Illinois 60935 Executive Towers West 111 1400 Opus Place, Suite 500 Document Control Desk Ucensing Downers Grove, IL 60515 Commonwealth Edison Company 1400 Opus Place, Suite 400 Commonwealth Edison Company Downers Grove, Illinois 60515 Reg. Assurance Supervisor-Braidwood l
RR 1, Box 79 Commonwealth Edison Company Braceville, Illinois 60407 Site Vice President - Braidwood j
RR 1, Box 84 Commonwealth Edison Company Braceville,IL 60407 Reg. Assurance Supervisor-Byron 4450 N. German Church Road Mr. David Helwig Byron, Illinois 61010-9794 Senior Vice President Commonwealth Edison Company Mr. Michael J. Wallace i
Executive Towers West til Senior Vice President 1400 Opus Place, Suite 900 Commonwealth Edison Company Downers Grove,IL 60515 Executive Towers West 111 1400 Opus Place, Suite 900 l
Mr. Gene H. Stanley Downers Grove, IL 60515 PWR's Vice President Commonwealth Edison Company Executive Towers West ll!
1400 Opus Place, Suite 900 Downers Grove,IL 60515 Mr. Steve Peny BWR's Vice President Commonwealth Edison Company Executive Towers West ll1 1400 Opus Place, Suite 900 l
Downers Grove, IL 60515 Mr. Dennis Farrar
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Regulatory Services Manager Commonwealth Edison Company Executive Towers West lll i
1400 Opus Place, Suite 500 Downers Grove, IL 60515