ML20125B939

Notifies That Westinghouse Briefed Utils Re Problems W/ Stress Corrosion Cracking in Westinghouse Low Pressure Rotors & Problems w/1,800 Rpm Low Pressure Turbines, Reportable Per 10CFR50.55(e) or 10CFR21.W/lists of Plants

ML20125B939
Person / Time
Site:	North Anna
Issue date:	11/05/1979
From:	WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
Shared Package
ML20125B934	List: ML20125B935 ML20125B939
References
REF-PT21-79-166-000 NUDOCS 7912310386
Download: ML20125B939 (4)

Text

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Attachment 1 November 5,1979 Director Office of Inspection and Inforcenent  ;

-U. S. Nuclear Regulatory Consission '

Washington, D. C. 20555 October 30 -

Westinghouse Turbine brited utility i executives -

problers with L*c stinghcuce 1800 rpt L7 turbines, i

Major assumption current turbine missile reports -

stress corrosion cracking not possible failure mode con ~cributing to Pt .

Stress corrosion crackin); fcund in Westinghouse LP rotors three months ago.

May be-Part 50.55e reportable for plants using Westinghouse P1 in SAR analysis but Westinghouse claims not, at least til new P1 analysis finished (still several months away).

Utilities probably reluctant to report because of confusing Westinghouse position and uncertainty whether P1 significantly worse.

May be Part 21 reportable. If so, flagrant Westinghouse violation. l I

List o; ' zcs affected attached.

Copy to: Peter A Bradford, Cocmissioner i

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CATEGORY A ]

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UTILITY STATION UNIT -

UTILITY STATION UNIT Alabama Power farley 1 i Plor ds P&L Turkey Point 3 Alabama Power rarlev 2 Censo!idated Ed. Indian Point 2 Baltimore C&L Calvert Cliffs 2 l PASNY Ind;an Feint 3 Carolina P&L Harris 1 Cerolina P&L Harris 2 Arkansas P&L Russellville 1 Carolina P&L Harris 3 l 1

Carolina P&L Harris 4  !

VEPCO Surry Cincinnati GAL Zimmu 1 j Care, lina P&L Robi.1 son 2 1

Commonwealth Ed. Byron 1 l

Sc. Cali'- - id' San Onofre 1 Commonwealth Ed. Byron '

. Commonwealth Ed. B raid w ood 1 Yankee n..r. Rowe 3 Commonwealth Ed Braidwood 2 Wis:. M;:h. Pwr. Point Bea:h 1 Connecticut Yankee Haddam Ne:k 1 Cc..sumers Pw r. Palisades 1 Duke Power McGuire 1 Dukt Power McCaire 2 Co nmonwea'th Ed. Zion 1 1 Duquesne Lt. Snimngpon 1 I Ccmmonwea:th Ed. Zion 2 2 Duquesne Lt.. Beaver \ a!!ey 1 Duquense Lt. Beaver Va:!ey 2 Fl:r da P&L Turkey Point 4 florida Power Corp. Crystal River 3 I Ne::raska FPD Cocper 1 l Florida Power & Lt. St. Lucie 1 Wisc. M.:h. Pwr. Point Bes:h 2 Florida Power & Lt. St. Lucie  :

Ma:ne Yankee Ba::ey Pcint 1 Houston L&P So. Tex 3s 3 Houston L&P So, Tex 3s  :

Rc:hester S&E Girna 1 Louisiana P&L Waterfora 3 N:rthern States Pra.rie Island 1 l

Metropclitan Ed Three Mile Island 2 W:s:. P .S. Kewaunee 1 Northern States Pwr. Prairie Island 2 Pub. Service E6G Salem 1 Pub. Service E&G Salen 2 Facific GLE Diablo Canyon 1 Pacific G&E Diat,:c Canyon 2 P.S. Indiana Marhle Hi!! 1 P.S. Indiana Martie H=" '

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, UTillTT STATION UNIT CATEGORY B

, ' Puget Sound P&L Skagit 1 SMUD. Rancho Seco 1 Baltimore G6E Wagner 3 l l

TVA sequoyah 1 TVA Sequoyah 2 Boston Ed New Best:n 1 TVA Watts Bar 1 TVA Watts Bar 2 Commonwealth Ed. Jc!.ct 7&P Commonwealth Ed . S!a:e Eine 4 VEPCO Nerth Anna 1 Commonweelte Ec. Waukr;an 8 VEPCO North Anna 2 VEPCO. North Anna 3 Duke Power be!cus Creek 1 VLPCO Ncrth Anna 4 VEPCO Surry 2 Philadelphia Eiec . Cc. Eddystene 1 WPP55 Hanford 2 Penn. Electric Keyst:ne 1&2 WPP55 WNPS 1 W?FiS WNPS 3 So. Calif. Ed. Alar.acs 3&E WPP55 WNPS 4 So. Cahf. Ed. Redcnd: 7&E WFP55 WNPS 5 Almaraz Almaraz 1 Almaraz Almarat 2 Asse:. As:o As:o 1 Assoc. Asco As:o 2 CATE3 CRY C Assc:. Vandelles Vandelles 2 L'TILITY ST ATICN l'N!T Cent El DePurnas Angra 1 Commonwealtn Ed. Rid g ela n c 1&2 lberduerc Lemeniz 1 Co nmanwelath Ed Craw forc 6 Iterduerc Lemoniz 2 Iterduero Sayaga 1 Detroit Ed. Ccnners Creek 15 & 16 Detrcit Ed. R:s er hct.;e ' 2 Pnilhptnes Baga: 1 Detroit Ed St C;a:r 6 Puerto Rito WRA Narco 1 Duke Pcwcr R:ver Bcnd 1 Taiwan Pcwer Chin Stan 1 Duquesne Lt. Reed 1&2 Ta:wan P:wer Chin Stan 2 Taiwan Fcwer Kuosheng ) Les Angeles DWF Hart:r 1&2 Taiwan Pcwer Kuosheng 2 Yug:slavia KRSKO 1 P.S. of No. !!!inc.s k.Il Ocunty 1 Philadelphia Elec. Co. Richme .d 10 Philade:phia Elec. Co. Ches:cr 1 Philadelphia Elec. Co. Scainwark I&2 )

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C Office of Instection and Enf6rcement g U. 3. Nuclear Regulatory Comraission

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Attachment 2 d. m PRELililNARY NOTIFICATION

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De t.e: November 70, 1979 t -- .

• EE=PRELIMIRARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-IIi- /9-43

, Thit $reliminary notification constitutes EARLY notice of events of POSSIBLE refety or public interest significance. The information presented is as

, initially received without verification or evaluation and is basneally all that. is known by IE st.aff on this date.

Facility: Cnumarmweals h Edlann Crwnpany, Zion Unit 1

, OMI 50k-795) 7. Inn, T111nnin Subjeer: CRACKS TN 1/12 PRESSURE TimRTNE DTSKS i

t During the overhaul of the unit 1 low pressure turbine, cracks oi indications have been found in' the D and C Section Discs. On November 14, 1979. crack indicatipna were f ound in the B section Number 2 disks and on November 20, 1979, two cracks were fuernd Iu'the C r.er t i on Ember 1 d l nks.

The cracka tound in the. C ne.ction Number i disks are each approximately one inch in lengLb and are luented near the shurt. According Lu the liceuwee a new wpindle will be required for permancor repair, or o rempnrary repnir rney be puewible by curr Inc, ne,r parr nt the <tinka and re.halanc.ing the. ahatt. Tt i n en ri mm r e.d r.ha r.

the. temporary repair will take six to seven vecks or the permanent repair will take

_ np to three monthm. The licenser in currently nr. tempting rn incate n rcpinccment

,:: -uptudle. The lleenMee eM LituMLem Lh=L Lhlw repult effurL will exLeud the present

( refueling outage.by. a minimuctof. 21 days (outage now estimated at 85 days as

' - oppuued Lu originni uchedule of 64 dayu).

The licenscc docs not plan to issue a presu releuve at thiu time.

The State of Illiuuis is belus nutified.

Thlu informativu lu cur rent un or 1:00 p.ci. un Novesiher- 20.-1979.

Cont a ct:

hkNf J. t:. rob er, nesident Inspector, 312/746-2321; p, c. 8o

$'W$ 4

, n111, we-7.s46 90000023 Distribution: Transmitted H St Chairmen Eeudric Comnirsioner Bradford S. J. Chilk, SSCY Connissioner Eenuedy Com=issioner Ahearne C. C. Kamme.rer, CA Co=sissioner Gilinsky ACKS (For Distribution)

Tranmir.ted - MGR P. Bldg --

IE:XOOS (IE: !!Q lh:1 1.. V. Cosmick, EDO H. R. Dent.on, NRR

11. L. Orn:;tein, EDO R. C. DeYoung, NRR J. J. Tourhard, PA R. J. Mattson, NRR Laudov (6 miu/ pas;e)

N. M. P. aller, rfPA D. Vassallo, NRR --

J. J. Cuwologs , OI A H. G. Fyan, OSP T. Eisenhut, NRR H. K. Sbspar, El.D p,S Bldg (

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W. J. Dircks. NMSS R. Minogue., Sn

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D fr) 9 [J S. Levine, RES IE:XOOS lL & \) y Dap 0F 7u2Lweq$

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