ML20217J566

Informs of Completion of Licensing Action for GL 92-08, Thermo-Lag 330-1 Fire Barriers. Requests Notification in Writing If Schedule or Resolution Plans Described in Submittal Change

ML20217J566
Person / Time
Site:	Davis Besse
Issue date:	08/11/1997
From:	Hansen A NRC (Affiliation Not Assigned)
To:	Jeffery Wood CENTERIOR ENERGY
References
GL-92-08, GL-92-8, TAC-M82809, TAC-M85542, NUDOCS 9708140332
Download: ML20217J566 (4)

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-f wAssiwaro . o.c. sonesanot p_ JO August 11, 1997 Mr. John K. Wood Vice President - Nuclear, Davis-Besse Centerior Service Company c/o Toledo Edison Company Davis-Besse Nuclear Power Station 5501 North State Route 2 Oak Harbor, CH 43449-9760 ,

SUBJECT:

DAVIS-BESSE NUCLEAR POWER STATION, UNIT 1 - COMPLETION OF LICENSING ACTION FOR GENERIC LETTER 92-08, " THERM 0-LAG 330-1 FIRE BARRIERS," DATED DECEMBER 17, 1992 (TAC NO. M85542)

Dear Mr. Wood:

By letters dated April 16, 1993 February 11, 1994, December 8, 1994, March 22, 1995, June 13, 1995, November 8, 1995, February 20, 1996, June 26, 1996, and November 5, 1996, you responded to Generic Letter (GL) 92-08, "Thermo-Lag 330-1 Fire Barriers," dateo December 17, 1992, and follow-up requests for additional information dated June 16, 1993, December 21, 1993, September 15, 1994, December 23, 1994, October 11, 1995, June 20, 1996, and October 9, 1996. In addition, by letters dated February 7, 1997, and 4

A)ril 25,1997, you submitted informatir regarding the combustibility of t1e 3M Interam fire barrier material, mis correspondence was in regard to Thermo-Lag 330-1 fire barriers installed at the Davis-Besse Nuclear Power Station.

You have determined to eliminate reliance on Thermo-Lag as a fire barrier material. This will be accomplished by circuit modifications, fire hazard reanalysis, removal of Thermo-Lag, and installation of alternate fire barrier materials. The alternate materials will include 3M Interam E-54 Flexible Mat, Internit Promat-H Calcium Silicate Cement Board, and Manoval Fendolite or Carboline Pyrocrete coatings.

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This will be accomplished by following a five-phase program. Phase I consisted of removing the Thermo-Lag from circuits in three rooms and from 0 fire dampers in five rooms, and is now complete. Phase II is scheduled for all of 1997 and the first two quarters of 1998. Phase II removes the Thermo-Lag from containment and installs new radiant energy heat shields. Phase III is scheduled for the second and third quarter of 1997. Phase III installs the new fire barrier material for circuits that had their Thermo-Lag removed in Phase I. Phase III also removes additional Thermo-lag from structural steel and installs the new fire barrier material. Phase IV is tied to the next refueling outage, which is scheduled for the second quarter 1998. Phase IV will remove the Thermo-Lag radiant energy heat shields from the annulus and will install new 3-hour fire barrier material.- Phase V is scheduled for the third quarter 1997 through all of 1998. This phase completes the installations on circuits where Thermo-Lag will be removed in Phase III.

9708140332 970811 PDR ADOCK 05000346 F PDR

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.J. Wood Your current schedule shows program completion by the end=of the fourth quarter 1998, though it is understood that you are considering accelerating the schedule to complete all phases by the end of the second quarter 1998.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed your submittals. On the basis of its review, the.NRC staff has determined that you  !

have provided the informat;on requested in GL 92-08 and the actions' tracked by TAC No. M85542 are complete.

However, there remain open issues-involving ampacity derating of Thermo-Lag 330-1 which emerged as a result of the GL 92-08 review. The resolution of these am)acity derating issues are being treated generically and are being

-tracked sy TAC No. M82809.

Please advise the NRC staff, in writing, if you change your schedule or the resolution plans described in your submittals. Include the bases for any changes in your corrective action plan and a justification for any changes in schedule. In addition, in accordance with GL 92-08, please advise the NRC staff, in writing, when tne actions described in your submittals have been implemented. GL 92-08 provides the Office of Management and Budget clearance for this information request.

lL l You should retain all documentation related to the resolution of the concerns

! with Thermo-Lag 330-1 fire barrier systems for future NRC audits or l inspections. If you have any questions regarding this matter, please contact me at (301) 415-1390.

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! Sincerely, Original signed by:

Allen G. Hansen, Project Manager Project Directorate III-3 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation l

Docket No. 50-346-l l cc: See next page DISTRIBUTION:

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J. Wood Your current schedule shows program completion by the end of the fourth quarter 1998, though it is understood that you are considering accelerating the schedule to complete all phases by the end of the second quarter 1998.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed your submittals. On the basis of its review, the NRC staff has determined that you have provided the information requested in GL 92-08 and the actions tracked by TAC No. M85542 are complete.

However, there remain open issues involving acpacity derating of Thermo-Lag 330-1 which emerged as a result of the GL 90-08 review. The resolution of these am)acity derating issues are being treated generically and are being tracked )y TAC No. M82809.

Please advise the NRC staff, in writing, if you change your schedule or the resolution plans described in your submittals. Include the bases for any changes in your corrective action plan and a justification for any changes in schedule. In addition, in accordance with GL 92-08, please advise the NRC staff, in writing, when the actions described in your submittals have been implemented. GL 92-08 provides the Office of Management and Budget clearance for this information request.

You should retain all documentation related to the resolution of the concerns with Thermo-Lag 330-1 fire barrier systems for future NRC audits or inspections. If you have any questions regarding this matter, please contact me at (301) 415-1390.

Sincerely, Original signed by:

Allen G. Hansen, Project Manager Project Directorate III-3 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation Docket No. 50-346 cc: See next page QISTRI3VTION:

Docket File OGC PUBLIC ACRS PD3-3 R/F JRoe EAdensam (EGAl) JCalvo GMarcus LTran p j GGrant, RIII D0udinot vf DOCUMENT NAME: G:\DAVISBES\DB85542.LTR Bol l'I 0FFICE LA:PD3-3 _ JE SPLS. \ . BC:EELB m, PM:PD3-3 d E OGC

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DATE (0 /i23/97 0 4 & /97 7/1'//97 / 75/ 7 / /97 0FFICIAL RECORD COPY gg frg/t/

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-John K. Wood Davis-Besse Nuclear Power Station Toledo Edison Company Unit No. I cc:

Mary E. O'Reilly Robert E. Owen, Chief Centerior Energy Corporation Bureau of Radiological Health 300 Madison Avenue Service Toledo, OH 43652 Ohio Department of Health P.O. Box 118 James L. Freels Columbus, OH 43266-0118 Manager - Regulatory Affairs Toledo Edison Company James R. Williams Davis-Besse Nuclear Power Station Chief of Staff 5501 North State - Route 2 Ohio Emergency Management Agency Oak Harbor, OH 43449-9760 2855 West Dublin Granville Road Columbus, OH 43235-2206 Gerald Charnoff, Esq.

Shaw, Pittman, Potts Donna Owens, Director

.and Trowbridge Ohio Department of Comerce 2300 N Street, NW. Division of Industrial Compliance Washington, DC 20037 Bureau of Operations & Maintenance 6606 Tussing Road P.O. Box 4009 Regional Administrator Reynoldsburg, OH 43068-9009 U.S. NRC, Region III 801 Warrenville Road Ohio Environmental Protection Agency Lisle, IL 60523-4351 DERR--Compliance Unit ATTN: Zack A. Clayton Robert B. Borsum P.O. Box 1049 Babcock & Wilcox Columbus, OH 43266-0149 Nuclear Power Generation Division 1700 Rockville Pike, Suite 525 State of Ohio Rockville, MD 20852 Public Utilities Comission 180 East Broad Street Resident Inspector Columbus, OH 43266-0573 U.S. Nuclear Regulatory Comission 5503 North State Route 2 Attorney General Oak Harbor, OH 43449 Department of Attorney 30 East Broad Street James H. Lash, Plant Manager Columbus, OH 43216 Toledo Edison Company Davis-Besse Nuclear Power Station President, Board of County 5501 North State Route 2 Comissioner of Ottawa County Oak Harbor, OH 43449-9760 Port Clinton, OH 43252 Roy P. Lessy, Jr.

Akin, Gump, Srauss, Hauer & Feld, LLP 1333 New Hampshire A.ve., NW., Ste. 400 Washington, DC 20036 I

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