ML16342C346

Followup to Gulf States Utils Part 21 Rept Re Wound Rotor Pole in Generator Unit of Standby Diesel Generator.Generator Mfg by NEI Peebles - Electric Products,Inc & Supplied to Util by Imo Delaval,Inc.Failure Analysis Being Conducted

ML16342C346
Person / Time
Site:	Catawba, Harris, Grand Gulf, River Bend, Vogtle, San Onofre, Comanche Peak, Rancho Seco, Bellefonte, 05000000, Washington Public Power Supply System, Shoreham
Issue date:	12/03/1987
From:	Guntrum B IMO DELAVAL, INC.
To:	NRC
References
REF-PT21-87, REF-PT21-87-214-000 PT21-87-214, PT21-87-214-000, NUDOCS 8712170030
Download: ML16342C346 (48)

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10 CFR 21 NOTIFICATION FROM PEEBLES TO NRC

, DATED JANUARY 4g 1991 GEORGIA POWER, VOGTLE PLANT PEEBLES NEMP 12.4 REVISION 1 lh ATTACHMENT B PAGE ~/ OFQlfo

i HEI ',keebles - ElectrIc Products', inc.

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17045 Euchd Avenue Cevetand. Ohio 44112 Telephcea: {216) 481-1500 Tefex: 241584 Facstmite: 8) 481<386 BUS File Copy EQDB, FOJH~S gS ills Noel~ RApyD 7REhlos January

4th, 1991 Mr. James Taylor, Director Office of inspection and Enforcement U.S; Nucjear Regulatory Commission Washington, D.C.

20555

SUBJECT:

10CFR21 Notification of Existence of a Reportable Defect in

(

Class 1E Diesel Generator.

'1

Dear'ir,

lt has been determined that a defect exists ln an air baffle weld in the following - '.

safepy related generator.

SHOP ORDER CUSTOMER UT ILlTY 17612172 Cooper Enterprise Georgia Power Enginle Division Vogtle Plant I

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I This equipment was manufactured by Parsons Peebles-Electric

Products, Inc.,

1725 Clarkstone Road, Cleveland,

Ohio, 44112 during 1981.

lt has been determined that the weld on one air louvre failed.

A full engineering report is attached.

Thi NRC Regional office in Chicago was notified of this situation by phone on Friday, January 4th.

1991.

I Should you require any fur ther information, please contact us.

Yours sincerely, 1

NEI PEEBLES - ELECTR C PRODUCTS, INC.

Ron B. Politi Vice President.

6 General Manager RCCEtVEO JUN 2 1 ~ggt I

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From:

C. Moosbrugger, Engineering Specialist-Qual ification

Subject:

Reported

'Meld Failure on Air Baffle Georgia Pover. Plant Vogtlc Cenerator S/N 176121'-200.

Enterprise P/N 76021%01 X.'72309 i~ssz4 KEHhRX According to reports from Cooper Industries (former1 y Enterprise),

an air baffle louver broke loose during removal of. the coil guard d"ipproof covers for cleaning purposes.

The louver, measuring approximately 4 in.

by 18 in., broke loose from the inside of a lover cover.

This )ouvcr had been tack veldcd to the cover in three places.

Tvo of the tack velds vere completely rusted and the third vas shiny/bright and may have broken as the cover flexed during removal.

Subsequent investigation of the remaining louvers found that all of the remaining eleven louvers (except one) had been velded the full leng& of one side securely to the cover.,The remaining louver had been also tack velded in, three places and there vas no visible indication of cracks in the velds.

The corrective action in the field vas.Xo veld the tvo louvers and exa=ine the dripproof covers

.on the remaining generators.:.

The louvers themselves serve no Safety Related functioh and are no structural members.

They must maintain their physical integrity, hovever, so they do not jeopardize the performance o.

the generator.

A vorst case scenario could be postulated vhere a

1ouver,. if ~ velds failed, could fall.,'If the machine vere operating at the time, it is possible that the louver could hit the rotating fan and projectiles crea-ed vhich could damage the rotor or coil end turns.

We do not feel that this failure vas a design defect, but vas random in nature and easily detectable during ordinary maintenance inspections.

Because of the possible serious consequences of the above

sceoerio, hovever, ve concur vith the assessment of the evalua ion sheet that the matter is a

reportable defect unde".

10CFR21.

We also concur vith the co[rect ive actions that vere takeh at Plant Vogtle.

We vould recommend that as a part of routine maintenance, louvers on dripproof end covers on machines of this design should be carefully inspected for cracked or rusted velds, and correc ive action be taken if the velds are suspect.

Proper maintenance vould dicta e

tha rust be removed and the surface be repainted to pro ec the base me al and velds.

As this is the first such incicent ve have knovledge of, and..

this pa icular machine vas shipped nine years

ago, ve feel it is accep=able to conduct 8he inspection at a scheduled maintenance period.

This incident: vould seem to indicate that the stator is more severely s ressed during handling tha'n vhen installed on an opera:ing machine.

Folloving is a list 'of all machines manufactured by Elec ric NEZ col wholes fltctrsc troouetg,

$w..

1?Q5 Eicos id Avenue.

clerelond, %io 4411?

pw-'-78~

~and iN. v A'EU i +iw Q p> g g g

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J 174309 products or its succeeding companies Used as emergencY yxesel

. generators in nucl'ear power plants vhich have dripproof covers of is design.

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3 M~ZX Gulf States Carolina Pover C Light Georgia Pover River Send Shearon i.arris Vogtle 17408442/443 174084 2/4 5

17612170/173 SK~D All of the companies o

Rancho Seco 18107512/513 above units vere sold by'Electric Products o its suc"ee"

Degaval, nov a part of Cooper Industries.

I Peeb e(s-E'e"tric Produc=s, Inc'.

Chn les ~oosb~ggeP Enginee:

ng Specialist-Qualif ication I

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80-00]

2.

bD-00) 3.80-019 SO~~ 80-)

SEF. 16-80 SOEF. 80 0<<

SGER 81-1G Loss of redundant emergency diesel generator starting air system Loss of emergency diesel resulting from leak in lube oil caoler.

Leak was cause" by severe corrosion of the solder vhfch sealed the tribes to the tube Sheets.

't Possibility of diesel breakers closing befare bus voltage has decayed due to design deficiency 4.

80- 026 SER 10-SO i@ring caid shutdown+

a safety injection signal accidenta'. ly

'.nftiated starting all three diesels.

A step vas missed in a surveillance test to cause 5.80-028 1: tepaC da ed 5-14-80 A diese 1 generator fa i le" to accept full )aaC during a tes because of undersized exciter leads to the generator field 6,80-051 81-10 Review of. emergency dlese1 genera. or loads indicated ths:

averload conditions could exist on emergency safeguards paver buses 7.80-061 SEF. 56-80 erosion damage to pistons and cylinder liners of both

. diesels vas discovered.

frbanks-Norse model ll7DB-l 8.

Discovered during eeual diesel-generator inspection.

Erosion caused by eater 4oaLagc into the cylinder.

S.

8b-062.

SEF. 57-80 SOER 81-10 Under certain conditfons logic aodule actuation vauld have

~llcwed an instantaneous overloading of the <<+erg encv diesel

l a

TTTiK SEi S-P!

SOr.

8 '1 0 SEc 36-8l Notepad 5-19-81 Diesel breakers may close before the load shedding logic has cleared the anergency

b. s due to a design deficiency r

Diesel generator fire hazard.

Smoke vas noted to be issuing fror. en oil soaked area on the insulation o; the exhaust

~Lanifold during a routine surveillance test on the emergency diesel generator.

Qil leak on the diesel engine caused a a&all fire S~~ 55-81 SEi 70-82 Emergency diesel eneratcr sustained dauage fron fire vhen lub>> oil spray ignited.

The Ienerator vas undergoing routine aonthly testing.

GEE': 136 Diesel genera. or eater ing SKR 6?-82 S~~

1C2-8.'-

Diesel generator bearing failure due to inadequate prelubrication Voters'a.ed 2-19. E2 IK Notice 82-08 Knergency diesel failed.

Fuel rack in lou fuel pos tio-...

Oil found in the governcr ehutdoiw solenoid aounted on top cf the UGS aodel 4'oodvard Iovernor

~

Checlr, valve failures on diesel Ienerator engine cooling oystecl SER 59-82 IER 56-82 Diesel generator load Mquencer deiign def iciency fail<<re of yne~tic hoie gaaociated <<ith euto 4epressur iaation Iystan (hDS) valves

'A ll"

SRKF f'o)ume 1

l~-]35 SO>3RCK SKE 79-62 TITlE Lass of'mergency bus REV.

1 o

20.

d2-) 54 21.83-005 22.

d3-0)1 23.

d3-017

'" 24.83-022 25.83-036 26.83-037 SEF, 78-82 SEE 2-83 IE Yotice d2-56, Scf-12)

Ol~+,- ) 10 SO:-r, 83-1 N'r. Rtr. Events Loss of ell diesel generators Packless globe and check valves - tva inch and sculler Nobertshav thermostatic flov control valves Erroneous valve pasitian 5pdicatian Pratt IGT-5 valve operator Diesel generatcr starting, aix aystem dryers Diesel generator failures Temporary unavailability of diese1 generator emergency

'pave r 27.

83-Oc6 TE Su))etin 83-03 Cheek valve failures in rav vater cooling systems af diesel generators 26.83-052 L

29.83-069

$0.

'3-076 31.

$3-090 SKr. 2)-6 IK Votice 83-)7 tvr. Itr. Events Sept.-Oct.

]982 SP 25-d3 Znoperable diesel generator due to inadequate fire

~ctuation signa)

Electrical cantrol logic probler., resulting in inoperable auto-start cf emergency diesel generators Isaergency bus loss due to breaker problems aergency diesel generator a@start aalfunction O.

32.03-097 33.

$ 3-)28 SOKR g3 5 SEE 48-83 Qaavailability of urgency

~r cauaed by 4iesel and breaker control circuitry 4a! ign

. Potential problecLs vith zgency diesel generator tooe ventilation p(~~

~E7Pt/

/ >>(>> f g&l/, (

SOURCE

'ZZTLK RKV.

1 35.

63-1 6C'6.83-170 37.83-173 3B.83-175 39.

83-1/9 IE K tice 83-51 IE Kotice 83-56 SKP, 6E-63 SKF. 70.83 SER 71-83 Sr=-. 73-63 Diesel generator event~

Transanerica delaval diesel generator crankshaft failure Kssential cooling vater system pipe lining failures Potential problems vith eaargency diesel generator contr@1 cabinet ventilation Inability to shut dovn diesel gasnerators Loss of all @over (s tat ion blackout) 40.

84-00'ER 2-6'iesel generator fuel oil storage tank lining failures and incompatibility of fuel oil vith tank coatings 41.84-025 42.

6 -136 43, BL-]L3 4c,.

Bc-150 45.84-154 SK~

16-8'EF.

42-6'K Vctice 84-69 Sr~

70-6-'FR 73-84 Differential relay problems in emergency diesel generator control circuits Syste= interdependency oversights result in loss of redundant safeguard functions Operation of emergency diese'enerators Emergency diesel genera.cr shaft. insulation breakdoi-..

(PRTECe IR".)

Nicrobiologically influenced corrosion 46.84-167 SER 78-84 Diesel generator scavenging air blover failure

)i N

C

SREF

/I SYSTEM 821 DIESEL ENGINE GEN SYS {EDG)

SOURCE TITLE REV.

1 Volmne 2 1.85-018 2.85-025 3.85-032 4.85-048 SER 3-85 IE Notice 85-08 SER 9-85 SER 16-85 Differential relay diode failures disable both emergency diesel Industry experience on certain materials used in safety-related equi~t Diesel generator failures caused by emergency atop push-button and undcrvoltage relay aalfunction Diesel 'generator failures duc to lack of'lubrication during, fast starts 5.85-063 IE Notice S5-25

'onsideration of thermal conditions in the design

<<nd installation of supports for diesel generator exhaust silenccrs 6.85-064 7.85-069 8.85-070 IE Notice 85-28 IE Notice 85-30 SER 20-85 Partial loss of hC povcr and diesel generator degradation Hicrobiolog ically induced corrosion of cont<<ident service vatcr system Three of four diesels trip due to sluggish governor response caused by cold aervice eater 9.85-073

10.85-096

11.85-116 H Notice 85-32 SER 25-85 SER 35-85 Recent engine failures of

~rgency diesel generators 3hergeney diesel generator.

failed <o supply ~rgency bus 'duc to non urgency trip Inadvertent diesel generator atart due to generator aotoring

4',

I I"

SREF fl SOURCE TITLE Volume 2

12.85-136 XE Notice 85-68 p( / /+c+EP Diesel generator failure at Calvert Cliffs

13.85-145

14.85-166

15.86-012 IE Notice 85-73 Trans. Delaval Ltr.

3/12/85

'IE Notice 86-07 Emergency diesel generator control circuit logic design error I

Taansamerica Delaval DSR, DSRV standby diesel

enerator, check valve Lack of detailed instruction and inadequate observance of precautions during maintenance and testing of diesel generator Woodyard governors

16.86-054

17.86-091

18.86-122 IE Notice 86-26 SER 22-86 IE Notice 86-70 Potential Problems in generators manufactured by electrical products incorporated Emergency diesel generators inoperable due to mechanical governor failures Potential failure of all

~rgency diesel generators

19.86-132 IE Notice 86-73 Recent ~rgency diesel generator problems

20.87-011

21. 86"016 N2.87-029

23.87-064 IE Notice 87-04 IE Notice 87-09 SER 8-87 SER 19-87 Diesel Ienerator fails test bacause of degraded fuel aaergency diesel generator room cooling design daficiency Diesel generator engine failure Loss of diesel fuel oil aakeup @bile vithout off-site powhr

SRE1'l SOURCE TITLE REV.

1 Volume 2

9

24.87-083

25.87-095

26.88-002 27,88-045 28.

8&-125 29.

8&-136 30.

8&-170 31.88-190 IE Notice 87-42 SER 30-87 GE SIL-392 Supp.

1 2/10/87 SER 11-88 IE Notice 88-75 Generic Letter 8&-15 OE 3052 OE 3078 Diesel generator fuse contacts Emergency diesel generator failed to build up voltage due to design oversight Improve HPCI turbine design

/

~l Inadvercnt disablement of the automatic start capability for all site diesel generators Disabling of diesel generator output circuit breakers by anti-pump circuitry Electric po~er systems inadequate contr'ol design processes Backfeed to 4160 volt supply bus due to improper electrical line-up and failure to install interlock operating plant experience rcport Diesel generator overspeed trip caused by air start valve failure 32.

89-02&

33.89-156 OE 3138 IE Notice 89-50 Non-comforming <<eters Inadequate e<<ergency diesel generator fuel supply

xvssz4

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gs g l/(, I I gC t l8) LRVRLLEE 14-NRY-80 2$ 21 PN NSRCrINPQ SI6NIFICRNT EVENT ST. LUCIE 1 50-3.5 ~80-013 03-17-80 C-E SRsv W "R" DIESEL 6ENERRTOP. FAILED TO ACCEPT FULL LORD DURIN6 R TEST CRUSE QR. INCORRECT EXCITER LERDZ TO THE 6ENERRTOR FIELD. THE LERDS HERE UNDERSIZED. T+IE POSSIBILITY OF THE SRNE FRULT EXl STING I'N OTHER DIESELS SHOULD BE EXRNINED. BlLL LRVRLLEE ~ NSRC ~ 415"855-2038 gc-+ S5--( 5f pc.~~~s wmr'> y /~ ~ w~~ >~ p

A-Ilj PacI..C Gas anII L.bctric Compa.,) NUCLEAR PLANT OPERATIONS I SAFETY REYlEVf EVENT FOLLOWER 85 136 sREF No. [ct~j-tIIj YEAR NO, ASSIGNED DATE ~ i / ENGINEER EVENT 5?e 5c/ ra 7 i4re Pi f i A DATE OF'VENT QLAIITDATA utn.itt WIT A/E NSSS SCC /Id('I ~ i REPORT SOURCES SER NO. SOER NO. ICE LKTTER NO. INFO NOTICE NO. LKR NOi CIRCULAR NO bULLKTINNOi NPRDS EVENT CLASSIFICATION D PP @ A PLICA8LE H8PP I 3 APPLICASLE 2 NCT APPLICABLE 8 NCT APPLICABLE r;. COMMENTS AND RECOMMENDATIONS Q TRAINI G "HE ~PP 1 1 I oJc'i ('i T-e Cku~ YTD 9 O~~. SAFETY REVIEW ENGINEER /2. ]kc ~ / 77 ~ CONTINUE ON SECOND SHEET IF NECESSARY 8Z >~g'tt NPPR NO. CLOSE-OUT APPROVAL NIOR SAFETY REVIEW ENGINEE DATE ~r l,t ,V oa ~ I stion t ~ vr ~ Jr PG>E FOR INTRA COMI ANY USES 85 136 fr9824 From Division or Depersmens To Drvrsron or Depersmens FILE NO. RE; LETTER OF SUBJECT NUCLEAR OPERATIONS SUPPORT DIABLO CANYON 026.14 IE Informatioh Notice 85-68: Diesel Generator Failure at Calvert Cliffs Nuclear Station Unit 1 Letter No. 85004219 (21-19) C November 15, 1985 JOHN M. GISCLON: Attention Terry L. Grebel The attached information notice discusses a significant safety problem involving cracked interpolar connecting bars, which connect the damper circuit of each rotor pole to the damper circuit of the adjacent rotor pole of the emergency diesel generator (EDG). At DCPP, the manufacturer of the EDG's is NEI Peebles Electric

Products, Inc.

The attached letter from the Diablo Canyon Project indicates that the Project contacted the manufacturer and determined that a "fail safe construction is employed on our generators. All rotor cage components remain captive upon their failure (however, unlikely) and therefore vt,ll not cause further damage+ Therefore, no action is required concerning this Notice. Should you have questions concerning.this Notice, please call me at extension '4451. IXN M. SHELUrY AYAtshan(222-5290):rn cc: RMBaciarel1i BWGiffin ltTRapp MRTresler ~gyp' g, y gcv: / AT 8'ttachment l