ML20112E274

Forwards Rev 1 to Calculation PI-NSP-95-002, Conductor Temp in Conduits Wrapped W/One H Darmatt Fire Barrier

ML20112E274
Person / Time
Site:	Prairie Island
Issue date:	05/29/1996
From:	Wadley M NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20112E278	List: ML20112E274 ML20112E280
References
GL-92-08, GL-92-8, TAC-M85592, TAC-M85593, NUDOCS 9606050212
Download: ML20112E274 (3)

Text

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Northern States Power Company Prairie leland Nuclear Generating Plant 1717 Wakonade Dr. East Welch, Minnesota 55089 May 29,1996 Generic Letter 92-08 1

U S Nuclear Regulatory Commission Attn: Document Control Desk l l

Washington, DC 20555

PRAIRIE ISLAND NUCLEAR GENERATING PLANT

! Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 l Follow-up Response to the November 17,1994 Request for Additional Information Regarding Thermo-Lag Related Ampacity Derating issues (TAC Nos. M85592 and M85593) in a letter dated November 17,1994, the Nuclear Regulatory Commission (NRC) transmitted a Request for Additional Information (RAI) Regarding Thermo-Lag Related Ampacity Derating issues for Prairie Island Nuclear Generating Plant.

l In a letter dated January 31,1995 we provided our response to the first 12 concerns expressed in the RAI. We stated that we would respond to the remaining concerns (13 through 20) by June 30,1995. Following the June 1995 submittal there was a telephone conference between NSP and NRC staff on January 30,1996 during which the NRC requested a representative calculation related to ampacity issues for Darmatt applications.

Attached to this letter is a calculation for conductor temperature in conduit wrapped with 1-hour Darmatt fire barrier for several cables installed at Prairie island.

In this letter we have made no new Nuclear Regulatory Commission commitments.

l 9606050212 960529 PDR ADOCK 0500o282- /) k F PDR OP i \\

t' USNRC NORTHERN STATES POWER COMPANY May 29,1996 Page 2 Please contact Jack Leveille (612-388-1121, Ext. 4662) if you have any questions related to this letter.

I e Michael D Wadley Plant Manager Prairie Island Nuclear Generat g Plant c: Regional Administrator - Region Ill, NRC Senior Resident inspector, NRC NRR Project Manager, NRC J E Silberg Attachments:

1. Affidavit

2. Calculation PI-NSP-95-002, Calculation for Conductor Temperature in Conduits Wrapped with 1-Hour Darmatt Fire Barrier (including only Appendix A to the Calculation) 9208-10. DOC

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UNITED STATES NUCLEAR REGULATORY COMMISSIO!4 NORTHERN STATES POWER COMPANY PRAlRIE ISLAND NUCLEAR GENERATING Pl. ANT DOCKET NO. 50-282 l 50-306 l l

l GENERIC LETTER 92-08, THERMO-LAG 330-1 FIRE BARRIERS Northern States Power Company, a Minnesota corporation, with this letter is submitting information requested by NRC Generic Letter 92-08, pursuant to 10 CFR 50.54(f).

This letter contains no restricted or other defense information.

NORTHERN STATES POWER COMPANY BY I Michael D Wadley i Plant Manager i Prairie Island Nuclear Generating ant 1

On this y of 4/2 before me a notary public in and for said County, personally appeared MiEFjlifetD Wadley, Plant Manager, Prairie Island Nuclear Generating Plant; and being first duly sworn ackno#ledged that he is authorized to execute this document on behalf of Northem States Power Company, that he knows the contgnts thereof, and that to the best of his knowledge,information, an belief the s e ents made in it are true and that it is not interposed for delay, t

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MARCIA K. LaCORE 3

@ NOTARYPUBUMINNESOTA 1i HENNEPIN COUNTY D WyCommission Erpires Jan.31,2000 l w s".v:::. :.v:::v.v.v:.v:,v:.v&n[

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