ML18038A333

Suppls 900904 Response to Generic Ltr 88-01 Re IGSCC in BWR Austenitic Stainless Steel Piping

ML18038A333
Person / Time
Site:	Nine Mile Point
Issue date:	11/02/1990
From:	Terry C NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NMP1L-0540, NMP1L-540, TAC-69147, NUDOCS 9011090008
Download: ML18038A333 (5)

Text

ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM

~ ~

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9011090008 DOC.DATE: 90/11/02 NOTARIZED: NO DOCKET FACIL:50-220 Nine Mile Point Nuclear Station, Unit 1, Niagara Powe 05000220

.AUTH. NAME AUTHOR AFFILIATION TERRY,C.D. Niagara Mohawk Power Corp.

RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Suppls 900904 response to Generic Ltr 88-01 re IGSCC in BWR austenitic stainless steel piping.

DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR ENCL SIZE TITLE: OR Submittal: General Distribution NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD1-1 LA PD1-1 PD MARTIN,R.

INTERNAL: ACRS NRR/DET/ECMB 9H NRR/DOEA/OTSB11 NRR/DST 8E2 NRR/DST/SELB 8D NRR/DST/SICB 7E NRR/DST/SRXB 8E NUDOCS-ABSTRACT

+~EM OGC/HDS1 REG FILE 01 RES/DSIR/EIB EXTERNAL': NRC PDR NSIC NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR

.P 23 ENCL

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V NIASAIIA V MOHAI//NK NIAGARAMOHAWKPOWER CORPORATION/301 PLAINFIELDROAD, SYRACUSE, N.Y. 13212/TELEPMONE (315) 474-1511 NoveIIhex 2, 1990 NMPlL 0540 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C. 20555 Re: Nine Mile Point Unit 1 Docket No. 50-220 DPR-63 TA No. 6 14 Gentlemen:

In a letter dated September 4, 1990, Niagara Mohawk provided its response to the Nuclear Regulatory Commission's safety evaluation regarding Generic Letter 88-01, "NRC Position on IGSCC in BWR Austenitic Stainless Steel Piping." Item 3 of our letter provided justification for excluding from the scope of Generic Letter 88-01 the welds in the Reactor Water Cleanup (RWCU) System outboard of the containment isolation valves.

After further consideration, Niagara Mohawk has changed its position and will include in the scope of Generic Letter 88-01 the RWCU System welds outboard of the containment isolation valves. Niagara Mohawk will inspect a minimum of 10% of the RWCU System welds outboard of the containment isolation valves each refueling outage in accordance with the staff recommendations contained in Generic Letter 88-01.

Very truly yours, NIAGARA MOHAWK POWER CORPORATION C. D. Terry Vice President Nuclear Engineering

/kms 000102GG xc: Regional Administrator, Region I Mr. R. A. Capra, Director Mr. R. E. Martin, Project Manager Mr. W. A. Cook, Senior Resident Inspector Records 'Management 9011090008 901102 PDR ADOCK 05000220 goo/

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Ci Nine Mile Point Unit 2 PSAR Table 9A.3-9 (Cont'd)

Fire Harard Fire Fire Area (FA) Fire Zone Sat ty-Related FireI Barrier Figure or Fire Sub Ecpxipmeat ia Combus- Total Btu Loading Rociuirod Detection Extinguishing No. Number Name I* Name tible Bt /I! ~tb I ~tt /ft /~ at a t 9A.3 6 FA 58 906 NZ El 279'M>> 5,796 None Motors Zasul. 4 10/000 40 15 min Smoke LWS general area Misc ~ Iplip Cable trays Znsul.

Zasul.

349 9399 12/000 12/000 XTAX3'0/189 4, 188 112 788 detection 9A.3-6 FA 58 911 NN El 279'M>> 3, 154 None Hotors Zasul. 10, 000 20 7 Negligible Smoke Automatic LWS tanks detection s priakl or system 9A.3-6 FA 58 904 NZ El 279'W>> 1,040 Nano No combustibles Smoke LWS elFaporators h detection 9A.3 7 FA 58 911 NW El 291/-6" 3,010 None No combustibles Smoke Automatic LWS taaks detection sprinkler system 9A.3-7 FA 59 951 NN El 291/M>> 5, 646 Noae WSS oztrudor liaer Asphalt 4008 18/ 000 72 '44 28,791 22 min Smoke Automatic WSS general area WSS piping Asphalt 1489 18, 000 26,802 detection sprinkler WSS extruder Asphalt 325 18/000 5,850 system Oil/ WSS piping oil 19/000 aad oztruder

,Zubo 3040 400

~33 57 760 9A.3-7 FA 58 904 NZ El 291/-6" 6,722 Nano Hotors Zasul. 1 10,000 10 LWS evaporators Resin stg taaks Rosia 19800 18, 000 356/400 53[252 40 md.a Smoke Filter Plastic 50 18,000 900 detectioa Misc equip 1nsul. 54 12/000 648 I 9A. 3-7 FA 58 911 NN El 309'M>> 8,940 None Motors Znsul. 69 10/000 690 64/784 49 min Smoke Autccaatic LWS general 4re4 Misc ~ Iplip Znsul 12 12/000 144 detection spriaklor Cables Znsul. 14444 12,000 173,328 system Used rosin stg tk Rosin 22500 18,000 405 000 37&77 Sf p,@ED;f URE CARQ jy s0 Avails>>~

p ycrtl)rc C~r USAR Revision 2 2of3 October 1990 901109 0088~(lf