ML20045F905

Requests That NRC Be Informed of Actions Necessary & Schedule for Restoring Operability of Fire Barriers within 30 Days After NUMARC Program Review Results Re Util Response to Generic Ltr 92-08

ML20045F905
Person / Time
Site:	Clinton
Issue date:	06/29/1993
From:	Pickett D Office of Nuclear Reactor Regulation
To:	Phares R ILLINOIS POWER CO.
References
GL-92-08, GL-92-8, TAC-M85535, NUDOCS 9307090171
Download: ML20045F905 (3)

Text

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UNITED STATES t'

NUCLEAR REGULATORY COMMISSION

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6 WASHINGTON, D.C. 20555-0001 j

y June 29, 1993 Docket No. 50-461 Mr. Richard F. Phares Director - Licensing Clinton Power Station Post Office Box 678 Mail Code V920 Clinton, Illinois 61727

SUBJECT:

CLINTON POWER STATION - RESPONSE TO GENERIC LETTER 92-08, "THERMO-LAG 330-1 FIRE BARRIERS" (TAC NO. M85535)

By letter dated April 16, 1993 (U-602124), you provided a response in Generic Letter (GL) 92-08 for the Clinton Power Station (CPS).

Your response states I

that Illinois Power relied on Thermal Science, Incorporated (TSI)-supplied Independent Testing Laboratory (ITL) fire endurance tests conducted from 1982 through 1985 as qualifying the CPS installation details.

In addition, your response states that the Thermo-Lag fire barriers installed at CPS were installed with appropriate procedures and quality controls to ensure compliance with the NRC's requirements for fire barriers that were applicable at the time of installation.

Your response also states that deviations from the tested configuration have been evaluated.

Although Thermo-Lag barriers were evaluated and may have been considered qualified, the results of recent tests and inspections indicate that further actions are now necessary to address fire endurance and ampacity derating of Thermo-Lag barriers.

Your response states that appropriate actions to resolve these concerns are being developed through an industry program coordinated by NUMARC and you would apply the results of *he industry program, when completed, to the Thermo-Lag 330-1 installations at CPS.

Compensatory measures for inoperable barriers are in place and will remain in place until the fire barriers can be declared operable.

Your response to GL 92-08, however, did not provide a schedule by which corrective actions would be completed.

Your response states that the Thermo-Lag fire barriers utilized at the CPS resemble, but do not exactly replicate fire-tested configurations.

With the exception of a top panel installed on a cable tray in the Auxiliary Building, Thermo-Lag 330-1 installed at CPS appears to represent the materials, workmanship, methods of assembly, dimensions, and configurations of the CPS installation details and TSI Technical Note 20864.

In your response to GL 92-08, you indicated that the actions necessary to restore (or confirm) the operability of these barriers will be based on the results of the NUMARC program.

The staff expects that licensees referencing 9:g0 9307090171 930629 PDR ADDCK 05000461

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1 Mr.-Richard F. Phares June 29, 1993 r

the_ NUMARC program will review the results and,~ within 30 days af ter the completion'of the program, inform the NRC of the actions necessary and the schedule for restoring the operability of these fire barriers including plant specific or unique fire barrier configurations that_ are not bound by the -

NUMARC program and any potential barrier upgrades resulting from this testing.

In accordance with the reporting requirements of GL 92-08, you are also to confirm in writing, completion of the corrective actions.

The information requested by this letter is.within the scope of _ the overall burden estimate in Generic Letter 92-08 which was an average of 300 person-hours for each addressee's response. This request is covered by Office of l

Management and Budget Clearance Number'3150-00ll, which expires June 30, 1994.

Sincerely, Original signed by:

Li Chandu P. Patel for l

t Douglas V. Pickett, Senior Project Manager Project Directorate III-2 Division of Reactor Projects - III/IV/V-Office of Nuclear Reactor Regulation j

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.g Mr. Richard F. Phares Clinton Power Station Illinois Power Company Unit No. 1 cc:

Mr. J. S. Perry Illinois Department Vice President of Nuclear Safety Clinton Power Station Office of Nuclear facility-Safety Post Office Box 678 1035 Outer Park Drive Clinton, Illinois-61727

. Springfield, Illinois 62704 Mr. J. A. Miller Mr. Donald Schopfer Manager Nuclear Station Project Manager Engineering Department Sargent & Lundy Engineers i

Clinton Power Station 55 East Monroe Street Post Office Box 678 Chicago, Illinois 60603 Clinton, Illinois 61/27 Sheldon Zabel, Esquire Schiff, Hardin & Waite 7200 Sears Tower 233 Wacker Drive

' Chicago, Illinois 60606 Resident Inspector U.S. Nuclear Regulatory Commission RRn3, Box 229 A Clinton, Illinois 61727 Ms K. K. Berry Licensing Services Manager General Electric' Company 175 Curtner Avenue, M/C 382 San Jose, California 95125 Regional Administrator, Region III 799 Roosevelt Road, Building 4 Glen Ellyn, Illinois 60137 Chairman of. DeWitt County c/o County Clerk's Office DeWitt County Courthouse Clinton, Illinois 61727 Mr. Robert Neumann Office of Public Counsel State of Illinois Center 100 W. Randolpt, Suite 11-300 Chicago, Illinois 60601 i

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