ML20212D836
| ML20212D836 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 12/19/1986 |
| From: | Stefano J Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8701050060 | |
| Download: ML20212D836 (54) | |
Text
{{#Wiki_filter:_- December 19, 1906 4 Docket No. 50-341 LICENSEE: Detroit Edison Company (DECO) FACILITY: Fermi-2
SUBJECT:
SUMMARY
REPORT OF MEETING WITH DETROIT EDIS0N COMPANY RE FERMI-2 EMERGENCY DIESEL GENERATOR (EDG) UNRESOLVED MATTFRS 10, 1986, The meeting to discuss thewas held status in Bethesda, of Detroit EdisonMaryland Company'son(DECO Wednesday), December response to Operating License NPF-43 License Condition 2.C(10), and related studies, addressing NRC concerns as to the reliability of the Fermi-2 EDGs. These concerns were raised in light of the diesel engine main crankshaft and piston connecting rod bearing failures experienced during preoperational and startup testing. (Fermi-2uses four Fairbanks-Morse EDG's, two per each electrical division) to provide emer-gency a-c power should a loss of off-site power occur. Enclosure (11 is the slide presentation made by DECO during the meeting. Enclosure (2) is the agenda followed at the meeting. Enclosure (3) lists the meeting participants. The meeting was initially scheduled for December 3,1986, and announced accord-ingly in the PDR by memo dated November 14, 1986. A subsequent announcement in the PDR dated December P., 1986, changed the meeting date to December 10, 1986. A summary of the meeting discussion follows:
- 1. Bearing Problems - A detailed description of the diesel engine design, the bearing problems experienced, and the corrective actions being taken was presented by DECO. Independent studies contracted with Battelle and Failure Analyses Associates to investigate hearing problems are essentially completed and being assessed by DECO. DECO expects to fomally submit their findings to the NRC by the end of January, 1987. In light of this, D7.00 advised the NRC staff that Batte11e's report on the metallurgical investigation of defects found on the surface of the aluminum-tin bearings installed in the EDG's, provided to the NRC by letter dated November 21, 1986, be considered as infomational,
- 2. Air / 011 Boost Study - DECO's study of the use of the EDG air / oil boost system (a modification to the initial EDG design) has concluded that bearing prelubrication is still needed; i.e., the air / oil boost system has been found to be an enhancement for engine dry starts, but not a replacement for prelubrication.
- 3. DECO Response to NRC SER on the EDGs (NRC letter dated July 16, 1986) - A further clarification of DECO's response to the staff's SER, dated October 14, 1986, was discussed at some length.
8701050060 861219 PDR ADOCK 05000341 P PDR
i Mr. B. Ralph Sylvia Detroit Edison Company Fermi-2 Facility l , cc: l Mr. Harry H. Voigt, Esq. Ronald C. Callen LeBoeuf, Lamb, Leiby & MacRae Adv. Planning Review Section , 1333 New Hampshire Avenue, N. W. Michigan Public Service Connission l Washington, D. C. 20036 6545 Mercantile Way l P. O. Box 30221 John Flynn, Esq. Lansing, Michigan 48909 Senior Attorney
- Detroit Edison Company Regional Administrator, Region III
- 2000 Second Avenue U. S. Nuclear Regulatory Connission l Detroit, Michigan 48226 799 Roosevelt Road l Glen Ellyn, Illinois 60137 Mr. Dennis R. Hahn, Chief Nuclear Facilities and Environmental Monitoring Section Office Division of Radiological Health P. O. Box 30035 Lansing, Michigan 48909
( Mr. Robert Woolley l Acting Supervisor-Licensing l Detroit Edison Company Fermi Unit 2 6400 North Dixie Highway Newport, Michigan 48166 Mr. Walt Rogers U. S. Nuclear Regulatory Connission Resident Inspector's Office t 6450 W. Dixie Highway Newport, Michigan 48166 i Monroe County Office of Civil Preparedness 963 South Raisinville Monroe, Michigan 48161 i I L
-?-
In its response DECO has requested some flexibility as to when bearing gap checks should be performed. DECO proposed that the special visual inspection of the top half of bearing No.13 on the upper crankshaft of EDG No.13 be performed within the " envelope of acceptability" within 30 days when the number of engine starts is comparable to those in the EDG Demonstration Test Program; and that gap checks of the main bearings be performed within 7 days from the day each automatic urprelubricated (dry) engine start occurs. The basis for the change is to prevent unnecessary forced plant shutdown to perform the bearing inspections. The NRC staff agreed to give priority consideration to DECO's reauested change and will advise Deco of the acceptability of the change on/or about December 19, 1986.
- 4. EDG Lube Oil Filter inspection - By letter dated September 30, 1986, DECO proposed the elimination of the EDG lube oil filter inspection and the related spectrographic analyses of the filter media committed to in Deco letters referenced in Operating License NPF-43 License Condition 2.C(10). Deco initially connitted to perform filter inspec-tions at 3-month intervals and to also perform an emission spectro-scopic analysis of elements found in the lube oil filter media.
It was agreed that NRC action on this requested license amendment be deferred until after DECO has completed its assessment of the Ratte11e and Failure Analysis Associates bearing study results discussed in 1 above. DECO expects to revise its license amendment request at that time to delete License Condition 2.C(10) in its entirety. The meeting was adjourned at 11:35 a.m.
/S/
John J. Stefano, Sr., Project Manager BWR Project Directorate No. 3 Division of BWR Licensing
Enclosures:
As stated cc: See next page
*SEE PREVIOUS CONCURRENCE I Wh C_ BWD-3: DBL PSA: D:BWD-3: DBL
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In its response Deco has requested some flexibility as to when bearing gap checks should be perfonned. DECO proposed that the special visual inspection of the top half of bearing No. 13 on the upper crankshaft of EDG No. 13 be performed within the " envelope of acceptability" within 30 days when the number of engine starts is comparable to those in the EDG Demonstration Test Program; and that gap checks of the main bearings be performed within 7 days from the day each automatic unprelubricated (dry) engine start occurs. The basis for the change is to prevent unnecessary forced plant shutdown to perform the bearing inspections. The NRC staff agreed to give priority consideration to DECO's requested change and will advise Deco of the acceptability of the change on/or about December 19, 1986.
- 4. EDG Lube Oil Filter inspection - By letter dated September 30, 1986, DECO proposed the elimination of the EDG lube oil filter inspection and the related spectrographic analyses of the filter media committed to in Deco letters referenced in Operating License NPF-43 License Condition 2.C(10). DFCo initially committed to perform filter inspec-tions at 3-month intervals and to also perform an emission spectro-scropic analysis of elements found in the lube oil filter tredia.
It was agreed that NRC action on this requested license amendment be deferred until after Deco has cotopleted it's assessment of the Battelle and Failure Analysis Associates bearing study results discussed in 1 above. Deco expects to revise its license amendment request at that time to delete License Condition 2.C(10) in its entirety. The meeting was adjourned at 11:35 a.m. John J. Stefano, Sr., Project Manager BWP Project Directorate No. 3 Division of BWR Licensing
Enclosures:
As stated cc: See next page l l ( 'D-3: DBL D : DBL
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- December 19, 1986 MEETING SIMMARY DISTRIRUTION t
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, NRC PDR
! Local PDR ! BWD #3 r/f r 4 J. Partlow E. Adensam Attorney, OGC E. Jordan B. Grimes ACRS (10) , Project Manager J. Stefano J E. Hylton i 4 l l NRC PARTICIPANTS '
, F. A. Maura ,
i J. J. Stefano i i A. Notafrancesco ' i J. Kudrick E. G. Adensam ) W. P. Haass 1. r 1 e J E r l 1 i i i t t ) bec: Applicant A Service List d j l l i, 1
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LPER NO.3 mlN #O UNETING RW BEARifG FAILED LOfR NO.4 mlN EMlfE FAILED CAP CHIX BUT RETIONoL LPHR PAIN THUST BEAING - SLEFAE SCORING CAUSE: ROOT CAUSE C0ll.D NOT BE ETER41NED WrO_USIVELY FR W4BLE CAUSE: NO. 3 C0ffECTING R@ BEARING FAILED DlE TO FRACTURE FRACRRE RESLLTED FR04 IN00EGATE Cl#P ON EARifE EVIDENCE: LOCALI2ED FRGLEM EARifE FRA&EfEED NO Sl(NS T HIGH TEMERAllRE NO EAT DISOCLOMT10N NO M1.TED #O C0f0EA_ED ALLMINLM BENT EtNECTINS RW Ba_TS FRETTING ON C0ffECTING RW FAES EARif0 AS INitL!tu IN J4NLFRY 1985 #O WoS IN (DCD C0f0lTl0N NO. 3 mlN BFJRING FAILED DlE TO EmEASED OIL FLO4 TO BEARING RNilfE FNES AS A RESLLT OF TR G EEARifG FAILlRE INITIAL ACTICN: INTECT A_L SEARINGS ON ALL EDGS.
E&MER 1985: EDG 11 EWNT: IDRim INSPECTIONS (TC.3 a DEC.27) FRTLEM: SEVERAL BEARINGS FOUK) WITH WAW SIRAE SCORING (EC.3) M) EARINGS FAILED TE CAP OEK (EC.27) CAUSE: LPRR 0@N(SHN T BORE ALl(NENT REPAIR: REALl(NI) BORE TO WilHIN 0 TO 40.5 MILS FR04 REFERBCE LINE na
JAMDRY 1986: ORECTIVE ACT10N REPLA&D ALL FAILED #O SCORED BEMINGS EXCEPT 3 ON tDG M (TRKE) 0%KE TO KBIL OIL ON Al EDGS (FORERLY USED SFfLL OIL) EDGS 11 #O 13 (EDGS ll%T EXPERIEFCED BEARlm FAILlRES) R_USWD LLBE Oli SYSTEMS TO REMWE FORElm l%1ERIAL CONICHD 100 FOR POST fMINTENotCE SEASONIE TEST RUNS 00NJUCTED A RELIABILITY EKNSTRATION SlHAATED TE IUBER & STARTS PREllCTED FOR A FLEL CYQ.E R.US A CE W_EK LOOD RUN 20 SL(N STARTS (EAO-l START F(LLMD BY 2 FR RUN) ,' 10 FAST STARTS (EAO-1 START FO L0fD BY 2 FR RUN) 7 [RY LO40 RUN (168 FQRS)
ESLLTS: DEKNSTRATION TEST RUN FFTRIPfl0N EDG 11 EDG 13 POST m lNTEN#CE: TEST RlN (HORS) 152 162.5 S_CN STARTS 8 9 (%P CHECK RESLLTS SATISFACTCRf SATISFACTOW DEKNSTRATION: SLO 4 STARTS C0fLETED 22 21 GAP CWCK RESLLTS SATISFACTOW SATISFACTCR( FAST STARTS COFLETED 10 10 (%P CWCK RESLLTS SATISFACTORf SATISFACTOW LOO RUN (HORS) 192.5 269 TOTA _ RUN KlRS 263.5 341 G4' CRCK ESULTS SATISFACTORY SATISFACTORY
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TOTAL SLOV STARTS 30 30 TOTA FAST STARTS 10 10 TOTAL RUN KlRS 415.5 503.5 l VISLML BEARING INTECTIONS BEARIN3 INSPECTED 3,5,6,8,9,13 3,4,7,10,13 ESLLTS: ALL EEARINGS EXCELifNT EXEPT EDG 1318UST (NO.13 BEARING) TRACE E SLIFAT SCORING EDG 11 TWUST (NO.13 ffARIN3) TRAE 7 SLRFAE SQRlm a ETA. TRANSFER l ETAL REM 0WD FR04 JORML #O EEARINGS EINSTALLED l l
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DETR0ii EDISON ORIGINAL COMMITMENT o Gap Check Bearings after 3 unprelubricated starts
- at six month intervals o Inspect EDG 13 Upper Thrust Bearing at
- 18 month Tech Spec Surv/Insp
- or first refueling outage SER MODIFICATION OF COMMITMENT o Gap Check Bearings
- after every unplanned start
- at six month intervals
'- 0 Inspect EDG No. 13 Upper Thrust Bearing
- at 18 month Tech Spec Surv/Insp or
- first refueling outage
- Within demonstration program envelope DETROIT EDISON RESPONSE TO SER MODIFICATION O Detroit Edison will comply
0 Time Frame for Gap Check: 7 Days
- To prevent forced plant shutdown if one or both EDGs per division experience auto (dry) start
- - To allow scheduling of the gap check with respect to plant operations o OPERABILITY During 7 Days
. - EDGs considered operable up to gap check performance'
- Plant allo,wed to continue operating as scheduled o Reliability
- Safety of Plant not compromised
- , - Two independent divisions maintained
- Past experience indicates that numerous dry starts are necessary before bearing i failure can occur i
-% e----.-. w r - - - - - . - . , y e
4 SPECIAL VISUAL INSPECTION OF UPPER HALF 0F #13 UPPER CRANKLINE THRUST BEARING ON EDG #13 O Time frame for bearing disassembly for visual inspection of EDG 13 30 days after 'Jamonstration test program envelope reached (10 fast starts or 30 slow starts) O Present number of starts on EDG 13 since demonstration test program 8 fast starts (shd f_Jr3 defs) 17 slow starts o Envelope could be reached anytime due to unplanned auto starts o 30 days would: allow inspection scheduling flexibility with respect to plant status., allow time for NRC to be present eliminate need for immediate shutdown of plant o Operability EDG 13 considered operable until inspection - Plant allowed to continue operating as scheduled with respect to applicable Tech Specs o Reliability Safety of plant not compromised Two independent divisions maintained Detroit Edison has never had a failed thrust bearing on any EDG
F-e S ELIMll% TION OF LIBE OIL FILTER ffDIA INPECTIONS O
EDG LUB E O IL $1f TE M CW E Tc H k ' L.O. $nmett l i
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- ENGINE DRtVEt* - V-* O
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! . .i d i l l l v FGLL FLO W l .tTAunsy $ TR AINER O IL tt E A TEA
_. WHAT IS PRESENTLY D0tE , i OIL SNMES FILTER INSPECTIONS 0 GAP OEO(S e l so
_. OIL ANALYSIS .
.o WEN: EVERY MhTH (2 HOURS RUN TIE NOMIIR)
WMT: FERMI 2 SITE LAB: PENTAE INSOLIRES KIEPATIC VISCOSITY DETROIT EDISON ENGIEERING RESEARCH LAB PENTAE INSOLUBLES INSOLUBLE ETALS ALWINLI1 IRON OTERS FERR0 GRAPHIC ANALYSIS CLEVELAND TECWICN. CENTER LAB SUSPEf0ED ETALS ANALYSIS
- AM0lNT OF FLEL OIL, WATER, AND / OR DIRT OIL QUALITY 3i
FILTER INSPECTIONS PERFORED AT THREE M) NTH INTERVALS
.VISLR INSPECTION EXTERNAL FILLER ELEENT VISLR INSPECTION INTERNAL FILLER STACK EMISSION SPECTROSCOPIC #RYSIS ELBO.T I)EPOSITS 4
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We s -o ,.. FILTER INSPECTION ACTION EAR PARTICLES FOUND EX&ED CRITERIA TEN PERFORM GAP O E G
, H0ENER, PPESENTLY PERFORM GAP CWCK AFTER EVERY NON-PRELUBED FAST START PERFORM GAP CWG EVERY SIX PDRHS G5 HOUR N711NAL RUN TIW)
OIL ANALYSIS'MAY REQUIRE GAP CWCK 4
singy WANT TO PEPFORN PEDICTIVE f%INTEfMNT THAT IS DETECT IEARING PROILEMS EAPLY HOW
, GAP CEO(S @ SIX MONTHS AND / OR EVERY NON-PRElllIED START OIL #W.YSIS EVERY f0NTILY SUP.VEILLANT P.Uf.
4 i . _
. _ . . -__ _ .- ________ 1L
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foSUf2 (Etb i AGENDA FERMI .2 EMERr,ENCY DIESEL GENERATOR MEETING DECEMBER 10, 1986
- 1. Introductions
- Scope of Meeting
- Objectives
- Background II. Discussion of EDG Investigations
- Failure Analysis Associates Investiaation Findings
- Battelle Investigation of Bearino Defects
- Air Boost Prelubrication System Study III. Deco Response to NRC Draft'SER on Pending Failures VI. Deco Proposed Amendment of NPF-43 License Condition 2.C.(10);
(e.g. deletion of lube oil filter inspections). V. Agreements and Comitments
. REFERENCES DECO letter VP-86-0073 dated 9/30/86 - Proposed amendment of NPF-43 License Condition 2.C.(101 DECO letter VP-86-0145 dated 10/14/86 - response to NRC Oraft SER on EDG's submitted to DECO by letter dated 7/16/86 l Deco letter - air boost prelubication system study report due 11/17/86 Deco letter .Battelle Investigation Report on EG bearing defects due 11/17/86
r-Endawe Gg) DIESEL GENERATOR MEETING 12/10/86 NAME PHONE NUMBER ORGANIZATION S. Frost 313-586-4210 Detroit Edison / Licensing S. Schumitsch 313-586-1676 Detroit Edison / Maintenance J. Fix 313-586-1611 Detroit Edison / Maintenance C. Ankrum 608-364-8131 Colt Industries J. R. Green 313-586-1055 Detroit Edison T. Skinner 608-364-8174 Colt /Fairbanks-Morse J. E. Sherwood 313-586-4072 Detroit Edison / Licensing F. A. Maura 312-790-5696 NRC Region III J. J. Stefano 301-492-9473 NRC Project Manager A. Notafrancesco 301-492-9444 NRC/ DBL /PSB J. Kudrick 301-492-7626 NRC/ DBL /PSB E. G. Adensam 301-492-8180 NRC/ DBL /BWD3 L. Swanger 703-683-5550 Failure Analysis Associates J. Nyquist 313-586-4218 Detroit Edison E. H. Trotier 301-492-4973 USNRC-Vendor Prog. Branch W. P. Haass 301-492-9041 NRC/IE/VPB T. Randazzo 313-586-4320 Detroit Edison / Reg. Aff.}}