ML20087G230

Responds to 941229 follow-up to Request for Addl Info Re Thermo-Lag Related Ampacity Derating Issues

ML20087G230
Person / Time
Site:	Prairie Island
Issue date:	03/29/1995
From:	Wadley M NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-92-08, GL-92-8, TAC-M85592, TAC-M85593, NUDOCS 9504040020
Download: ML20087G230 (2)

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Mr Northern States Power Company Prairie Island Nuclear Generating Plant 1717 Wakonado Dr. East Welch, Minnesota 55089 March 29, 1995 Generic Letter 92-08 U S Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 Response to the December 29, 1994 Followup to the Request for Additional Information Regarding Thermo-Lag Related Ampacity Derating Issues (TAC Nos. M85592 and M85593)

In a letter dated December 29, 1994, the Nuclear Regulatory Commission (NRC) transmitted a Followup to the Request for Additional Information (RAI)

Regarding Thermo-Lag Related Ampacity Derating Issues for Prairie Island Nuclear Generating Plant. This letter provides our response.

Based on the NEI test results and application guide, we plan to replace Thermo-Lag on required fire barriers with Darmatt, using the Darchem supplied testing bases and derate values. For this reason, we will not be verifying the properties or barrier parameters of our installed Thermo-Lag. Our commitment remains to resolve the Thermo-Lag issue at Prairie Island by December 31, 1996.

Please contact Jack Leveille (612-388-1121, Ext. 4662) if you require further information.

Michael D Wadley Plant Manager Prairie Island Nuclear Generating Plant ec: Regional Administrator - Region III, NRC NRR Project Manager, NRC Senior Resident Inspector, NRC Kris Sanda, State of Minnesota

Attachment:

Affidavit GL9208-7. DOC 4

9504040020 950329 PDR ADOCK 05000282 l p .P,DR

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AFFIDAVIT UNITED STATES NUCLEAR REGUIATORY COMMISSION NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT DOCKET NO.'50-282 50-306 THERMO-IAG 330-1 FIRE BARRIERS

Northern States Power Company, a Minnesota corporation, with this letter is submitting information requested by Generic Letter 92-08, Thermo-Lag 330-1 Fire Barriers, pursuant to 10 CFR 50.54(f). <

This lotter contains no restricted or other defense information.

NORTHERN STATES POWER COMPANY By M/ '

Michael D Wadley Plant Manager Prairie Island Nuclear Ge rating Plant Onthisk c y of M [ before me a notary public in and for said .

County, personally appeared Michael D Wadley, Plant Manager of Prairie Island Nuclear Generating Plant and being first duly sworn acknowlsdged that he is-authorized to execute this document on behalf of Northern States Power Company, that he knows'the contents thereof, and that to the best of his knowledge, information, and belief the statements made in it are true and that it is not interposed fo de .

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