ML20217H558

Discusses 970724 Response Submitted by Licensee on RAI Re GL 92-08, Thermo-Lag 330-1 Fire Barriers, for Cps. Concludes That No Significant Safety Hazards Introduced at CPS for Net 32 Percent Ampacity Derating Factor

ML20217H558
Person / Time
Site:	Clinton
Issue date:	03/27/1998
From:	Hopkins J NRC (Affiliation Not Assigned)
To:	Sipek J ILLINOIS POWER CO.
Shared Package
ML20217H561	List: ML20217H558 ML20217H577 ML20217H592
References
GL-92-08, GL-92-8, TAC-M85535, NUDOCS 9804030392
Download: ML20217H558 (5)

Text

'

e e,Y 54 Sh* fbf a" k UNITED STATES I

j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20556- @ 01 4

9 . . . . . ,o March 27, 1998 Mr. Joseph V. Sipek Director- Licensing Clinton Power Station P.O. Box 678 Mail Code V920 Clinton,IL 61727

SUBJECT:

GENERIC LETTER 92-08 REQUEST FOR ADDITIONAL INFORMATION -

THERMO-LAG RELATED AMPACITY DERATING ISSUES FOR CLINTON POWER STATION (TAC NO. M85535)

Dear Mr. Sipek:

I By letter dated July 24,1997, Illinois Power Company (IPC) submitted a response to the NRC Request for Additional Information (RAl) related to Generic Letter (GL) 92-08, "Thermo-Lag 330-1 Fire Barriers," for Clinton Power Station (CPS). The NRC staff, in conjunction with its contractor, Sandia National Laboratories (SNL), has completed its review of the licensee's analytical approach for ampacity determinations. The results of the review are documented in the enclosed Safety Evaluation (Enclosure 1), SNL Technical Evaluation Report, "A Technical Evaluation bf the Clinton Power Station Fire Barrier Ampacity  :

Assessments," dated May 2,1997 (Enclosure 2), and the letter from S. Nowlen to R. Jenkins dated October 30,1997 (Enclosure 3).

On the basis of the subject review, the NRC staff concludes that no significant safety hazards i are introduced at CPS for (1) a net 32-percent ampacity derating factor (ADF) for the 1-hour and 3-hour conduit fire barrier systems and the 1-hour cable tray fire barrier systems; and (2) a net /1.4-percent ADF for 3-hour cable tray fire barrier systems. Therefore, the staff requests that the licensee respond in writing addressing this issue. In addition, the staff finds that the licensee should verify that the Thermo-Lag-enclosed e;ectrical raceways are installed and constructed in a manner representative of the applicable tested fire barrier configurations (i.e.,

Texas Utilities Electric and FLWda Power Corporation ampacity derating test configurations) i

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980Q30392 980327  ?

7 PDR ADOCK 05000461 F PDR

7 J. Sipek - from which the 32-percent and 41.4-percent ADF values were derived. In your response, -

include a discussion of your approach in this area. We request a response within 45 days of receipt of this letter, Contact me if you have any questions.

Sincerely, i

n B. Hopkins, Senior P oject Manager Project Directorate 111-3 Division of Reactor Projects lil/lV Office of Nuclear Reactor Regulation Docket No. 50-461

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Enclosures:

As stated cc w/encis: See next page

^* ., ,.

J. Sipek from which the 32-percent and 41.4-percent ADF values were derived. In your response, include a discussion of your approach in this area. We request a response within 45 days of receipt of this letter.

Contact me if you have any questions.

Sincerely, Original signed by:

Jon B. Hopkins, Senior Project Manager Project Directorate 111-3 Division of Reactor Projects lil/lV Office of Nuclear Reactor Regulation Docket No. 50-461

Enclosures:

As stated cc w/encis: See next page Distribution:

Docket File PUBLIC PD3-3 R/F ACRS RJenkins OGC EGA1 GGrant, Rill RSavio Document Name: G:\CLINTON\T _ LAG.RAI 0FFICE PM:PDIII-3 lE LA:PDIII-3 6 NAME- JHopkins M EBarnhil1 f &

DATE 3 / 7 7/98 /l 3 / $~7/98 0FFICIAL RECORD COPY

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, ,r o

./

J. Sipek from which the 32-percent and 41.4-percent ADF values were derived. In your response, include a discussion of your approach in this area. We request a response within 45 days of receipt of this letter.

o Contact me if you have any questioris.

Sincerely, Original signed by:

Jon B. Hopkins, Senior Project Manager Project Directorate lll-3 . ,

Division of Reactor Projects lil/IV -

Office of Nuclear Reactor Regulation Docket No. 50-461

Enclosures:

As stated cc w/encls: See next page Distribution:

Docket File PUBLIC PD3-3 R/F ACRS RJenkins OGC EGA1 GGrant, Rlli RSavio Document Name: G:\CLINTON\T _ LAG.RAI 0FFICE PM:PDIII-3 lE LA:PDIII-3 l6 NAME JHopkins ( ) EBarnhill E D' DATE 3 /;7-7/98 / 3 / S'7/98 0FFICIAL RECORD COPY

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b A e

- Joseph V. Sipek Clinton Power Station, Unit 1 Illinois Power Company cc:

John G.' Cook - lilinois Department of Nuclear Safety Senior Vice President Office of Nuclear Facility Safety Clinton Power Station 1035 Outer Park Drive P.O. Box 678 Springfield,IL 62704 Clinton,IL 61727 Larry Wigley Manager Nuclear Station Engineering Department

' Clinton Power Station P.O Box 678 Clinton, IL 61727.

Resident inspector U.S. Nuclear Regulatory Commission RR#3, Box 229 A Clinton,IL 61727 R. T. Hill Licensing Services Manager General Electric Company 175 Curtner Avenue, M/C 481 San Jose, CA 95125 -

. Regional Administrator, Region lll U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532-4351 Chairman of DeWitt County c/o County Clerk's Office DeWitt County Courthouse Clinton,IL 61727 J. W. Blattner Project Manager

. Sargent & Lundy Engineers 55 East Monroe Street Chicago,IL 60603 4

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