ML20126M482

Informs That Response to NRC Bulletin 92-01 Suppl 1, Failure of Thermo-Lag 330 Fire Barrier Sys, Acceptable

ML20126M482
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	01/05/1993
From:	Shiraki C Office of Nuclear Reactor Regulation
To:	Kovach T COMMONWEALTH EDISON CO.
References
IEB-92-001, IEB-92-1, TAC-M83952, TAC-M83953, NUDOCS 9301110015
Download: ML20126M482 (2)

Text

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4 January 5, 1993 y

Docket Nos. 50-295 D_lSTRIBUT103:

50-304 Docket File NRC and Local PDRs PDill-2 r/f J. Roe Mr. Thomas J. Kovach T. King J. Dyer Nuclear Licensing Manager C. Moore C. Shiraki Commonwealth Edison Company-Suite 300 OGC A. Masciantonio OPUS West 111 C. McCracken ACRS(10) 1400 OPUS Place PDill-2 p/f B. Clayton Rill Downers Grove, Illinois 60515

SUBJECT:

RESPONSE TO NRC BULLETIN 92-01, SUPPLEMENT 1, " FAILURE OF THERMO-LAG 330 flRE BARRIER SYSTEM" (TAC N05. 83952 AND 83953)

By letter dated September 29, 1992, as supplemented by additional information dated November 16, 1992, Commonwealth Edison Company (CECO) provided a response to NRC Bulletin 92-01, Supplement 1, for the Zion Nuclear Power Station. Your response stated that compensatory measures have been implemented consistent with the plant Technical Specifications. You also provided a description of the long-term corrective action to ensure or restore operability.

Your present corrective actions include one-hour roving fire watches and, in one case, a continuous fire watch patrol, for all impacted fire zones outside containment. Within containment, although Thermo-Lag is utilized as a radiant energy shield to separate the redundant pressurizer level instrument cables, this application is outside the scope of NRC Bulletin 92-01 and Supplement 1.

However, you are continuing to monitor the containment air temperature on an hourly basis, in the long-term, you stated that CECO supports NUMARC's efforts to address the Thermo-Lag issue.

We have reviewed your response and find it acceptable. We understand that all corrective actions, with the exception of those that might result from NUMARC's studies, have been completed. Further NRC review, if any, will be -

performed by inspection or audit.

Please contact me should you have any questions regarding this matter.

Sincerely, 4

Original signed by:

PD 0 00 95 Clyde Y. Shiraki, Sr. Project Manager G PDR Project Directorate 111-2 Division of Reactor Projects III/IV/V Of fice of Nuclear Reactor Regulation cc: see next page e I 0FC fL PD1 1-2 lPM:PDil@2 lSPLB lD:PDlII-2 l NAME lCSHIRAKl: jar lCMCC CKEN lJDERgg KA T'\ l DATE $/y/92 W / 9/92 l/ /[/93 l[.//g /92 l 41-

1 Mr. Thomas J. Kovach Zion Nuclear Power Station Commonwealth Edison Company Unit Nos. I and 2 cc:

Michael I. Miller, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60690 Dr. Cecil Lue-Hing Director of Research and Development Metropolitan Sanitary District of Greater Chicago 100 East Erie Street Chicago, Illinois 60611 Phillip Steptoe, Esquire Sidley and Austin One First National Plaza Chicago, Illinois 60603 Mayor of Zion Zion, Illinois 60099 Illinois Department of Nuclear Safety Office of Nuclear Facility Safety 1035 Outer Park Drive Springfield, Illinois 62704 U. S. Nuclear Regulatory Commission Resident Inspectors Office 105 Shiloh Blvd.

Zion, Illinois 60099 Regional Administrator, Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road, Bldg. #4 Glen Ellyn, Illinois 60137 Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolph Suite 11-300 Chicago, Illinois 60601

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