ML20009C365

Forwards Questionnaire Re Unresolved Safety Issue A-44 Concerning Station Blackout.Requests Response & Review of Encl LER Documentation within 90 Days to Allow NRC to Meet Schedule Requirements for Resolution of Issue

ML20009C365
Person / Time
Site:	Davis Besse
Issue date:	07/09/1981
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Crouse R TOLEDO EDISON CO.
References
REF-GTECI-A-44, REF-GTECI-EL, TASK-A-44, TASK-OR NUDOCS 8107200488
Download: ML20009C365 (20)

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JULY 91ll81 k

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Docket No. 50-346 JULi4iggy, 5 Mr. Richard P. Crouse u.a, %

Vice President - Nuclear E

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Toledo Edison Company

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Edison Plaza

'b 300 Madison Avenue A

Toledo, Ohio 43652

Dear Mr. Crouse:

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Subject:

Information Request Regarding Station Blackout, Unresolved Safety Issue A-44, Davis Besse Unit 1 I

The NRC staff is currently addressing Unresolved Safety Issue (USI)

A-44, Station Blackout. The purpose of this work is to establish th t safety significance of an event resulting ir. a loss of all alternating current power and, if significant, to consider the need for any specific changes. Over the past several years information requests have been forwarded which requested information that is being used in the USI analysis. Your interest and cooperation in the past have been appreciated.

At this time the USI A-44 effort is being directed toward determining the reliability of the onsite standby diesel generators. The enclosed questionnaire has been prepared to provide accurate operating experience to serve as a basis for such a determination. More specifically, its purpose is to obtain more detailed data than were available in previous diesel generator studies such as AEC-00E-ES-002, NUREG/CR-0660, and NUREG/CR-1362.

The questionnaire (enclosure 1) requests information in tabular fom and solicits data for the years 1976 through 1980, inclusive. There are four v. ables enclosed:

(1) Diesel Generator Operations Data, (2) Diesel j

Ger.erator Scheduled Dot:n Time Record, (3) Diesel Generator Unseneduled Down Time Record, and (4) Onsite Emergency Diesel Generator and Auxiliary Equipment Modification Record. Also enclosed are examples of completed tables as well a3 a clarification of what should be entered. Please note that, although it may appear that only Licensee Event Report (LER) information is sought, data on all diesel generator malfunctions, independent of whether an LER was prepared, is requested.

Please find enclosed LER documentation (enclosure 2) presently docketed for your facility. You are requested to review these and to indicate if i

there are other reports which have not been enclosed. Finally, please find enclosed a copy of the appropriate portions of your response (enclosure omcc) l l

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!NRC OFFICIAL RECORD COPY lusoeo i,8o-azia e24 OW 318 tlO.80l NRCM ONO

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e Mr. Richard P. Krause 3) to our letter of March 6,1978 which requestad related, but different, information. This is being forwarded for your information only and should aid in preparing Tables 1 through 4.

In consideration of the time and effort necessary to obtain this infonnation, the completion of Table 4 should be considered voluntary. However, it should be noted that if operational and hardware modificat{ons are not identified, the positive or negative ir.71uence of these features on emergency alternating current power reliability may be lost in the evaluation of the data. The expected effect is that our generic reliability estimates may be lower than that which actually exists.

The above information is requested in accordance with Sections 103.b.(3) and 161.c of the Atomic Energy Act of 1954, as amended. To meet our schedule requirements for the resolution of USI A-44 and to incorporate as much real experience as possible into the reliability model fer emergency power systems, it is requested that your response be provided s

within 90 days of the receipt of this letter. However, if this schedule is inconsistent with priority requirements for other licensing work, please nrovide us with your proposed date of response within 30 days.

We plan to complete our analysis of this data by February 1982. Your data should be provided by that time so that an accurate assessment of s

onsite alternating current power sources can be made.

Mr. P. Baranowsky has been designated Task Manager for USI A-44. Should you have any questions, please feel free to contact him at (301) 443-5921. Your time and efforts are appreciated.

D NTRIBUTION Sincerely, See~ attached 1ist a omGURL SIGElD BK JOICIF. STOL i

John Stolz, Chief j

Operating Reactors Seanch #4 Division of Licensing Enc 1asures:

As Stated cc: w/ enclosures See next page This request for information was approved by the Office of Management and Budget under clearance number 3150-0067 which expires May 31, 1983.

Coments on burden and duplication may be directed to the Office of Management and Budget. Washinnton.10. C.

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r Enclorurs 1 - Pcg3 5 TABLE ENTRIES

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E,XPLANATION/ CLARIFICATION Table 1 Reason for DG Operation and Scheduled Duration of Run: This column conteins the different categories of diesel generator operation. The categories are structured such that the start and run conditions are similar for all of the tests in a category. In this column, enter the scheduled run duration for e ach of the test categories. Also enter the number of diesel generator starts that are done for each type of test. Foi exa=ple, if on the monthly test there is one start from the local con-trols and one start from the remote controls, the nu=ber of starts per test is two.

If two or more diesels are started simultaneously

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for any reason, please record it as a multiple start.

DG No.: Enter each diesel generator's identification number in this column as shown in the exa=ple.

Number'of Starts: Enter the sum of the successful and unsuccessful start atte= pts for each category. If there are several starts for each test, include all of them, but be certain to record the number of starts per test in colu=n one.

Nu=ber of Failures: Enter the su= of the failures for each category. A failure is counted if the objectives of the test are not achieved.._A subsystem failure that does not cause, failure of the diesel generatur syste= is not counted as a failure. If the diesel generator did not start, run, and load as required by the test, a failure should be recorded. However, if the diesel generator would have supplied power in so=e capacity for an e=ergency, please explain in Table 3.

For exa:ple, if the diesel started on the second atte=pt or the diesel was tripped to repair a niner oil leak that would not have been a preble: in an e=ergency, this should be noted in Ta' ale 3.

Percent Leading of DG (Kk'): Enter the percentage that the diesel is leaded for each category. The continucus kilowatt rating is considered to be 100%.

Duration of Run Before Stop for each DG Failure: Record the run-time for each failure. If the diesel failed to start, the run-time would be 0 min.

Identification of Failures: Attached to this questiennaire are abstracts of the LERs related to the diesel generators. The abstracts are nu=bered starting with one.

Refer to this number to identify the failures, but if there was a failure for which there is no abstract, assign the failure a nu=ber and include it in Table 3.

Table 2 Reason for Downti=e: Enter in this column the categories of schedule ma'n-i tenance that make the diesel generator unavailable for emergency service.

If the diesel generator is unavailable for emergency service during j

i surveillance testing, report that also.

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Enclo3urs 1 - P ga 6.

- 2 I

Table 2 (cont'd)

Hours of Downti=e: Enter the number of hours that the diesel generator is unavailable for emergency service. Report the hours under the colu=n reactor shutdown or reactor not shutdown as appropriate.

Co==ents:

Co==ent on ti=e to return to service after maintenance has begun,.or other pertinent informati6n.

Table 3

,j5 LIR Abstract No. (Refer to att' ached LER Abstracts): The attached LERs are numbered starting from one. Refer to this LER number in colu=n one. Each LER abstract should have an entry in this table.

If there was a failure not. included in the attached abstracts,.please assign it a nu=ber and enter it in this table.

Downtime Ecurs:

En;er the nu=ber of hours that the diesel generator is unavailable for emergency service. Subdivide these total hours into troubleshooting, parts delivery, and repair or replace =ent.

Co==ents: Use this colu=n to ce==ent on the downtime and the failure.

If the reported failure was only a technical specification violation, but would not be a ec=plete failure of the diesel generator to ~

supply power or would only be a delay, please elaborate in this colu=n.

Table 4 Equip =ent or procedure =odified:

List in this colu== the equip =ent or procedures related to the e=ergency.cnsite power systen that have been modified since the reactor beca:e critical.

Date of Mod.:

Enter the date that the = edification was co=pleted.

Reason for Modification and Desired I= prove =ent: Report the reason for the =odification and the desired or observed i= prove =ent in the syste=.

Description of Modification: 3riefly describe what =edificatien was

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TABl.E 2 Plant Name (Sampic)

Diesel Cencrator Scheduled Downtiene Record Unit No.

Calendar Year 19 1

1 lloisrn of Downtime Reason for Reactor shutdown Reactor not shutdown Comments

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Downtime DCf DGf Dcr Scheduled Maintenance i

l Preventive 24 16 16 i

Haintenance Seini-annual &

Annual Equipment l

Modification 8

8 8

Hodified lube oil on each diesel. Diesels j

down at different times.

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Down 4 hrs per test 8

48 40 48 Diesel cannot be automatically started i

during test or for three hours af terwards 1

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' - Pegs 9 TAllif. 3 Dienci Generntor Unncheduled Downtime Itecord Plant Name XXX (Sample)

Calendair Year l'J __

Unt't No.

l&2'.

t N.

Commento - 11 any of the reported f ailures wonald not have been a 1.ER Abstract N<

Downtime Ilnors f bac under emergency conditions, please explnin Imre.

(Refer to attel Trouble-l'a r t s, Del - Itcpni r/

Refer to attactied.I.ERs or the failures listed in Table 1.

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1 2

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0.5 1

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12 1

10 1

4 0

0 0

0 Dienci ntarted in 15 see instead of required 10 sec 5

0 0

0 0

Secondary air preanure low.

Primary air satisfactory.

6 0

0 0

0 Secondary air prennure low.

Primary air satisfactory.

l 7

0 0

0 0

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8 0

0 0

0 False DC start signal. DC satisfactory No I.ER 9

0 0

0 0

Required DC starts after the failure of one diesel.

10 0

0 0

0 Starta to verify repairs.

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' - Pags 10 TARI.E 4 Onsite Emergency D.lesel Generator and Plant Name (Sample)

Auxiliary E<gulpment tfodification Record Unit No.

Equipment or Date of Reason for Hodification and t'

procedure Hod.

Desired Improvement Description of Hodification modified I

1,ube oil system 2/76 Improve turlio charger lubrication Soak-hack pump was removed and replaced with a for emergency starts.

continuous lube 011' pump.

New pump also continuously lubricates the crankshaft.

Relay cabinets 1/78 Prevent dirt from fouling relay Cabinet doors with gaskets were installed, contacts.

Instrument 6/79 Eliminate vibration damage to Cbutral and monitoring instrument panel was Relocation instruments relocated from the engine skids to a free standing panel mounted on the engine room l

floor.

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i 28/b/0000001-0000020//

I PAGE 233 ACCESSION NO.

00Z0163512 TITLE UPDATb ON DEblGN DE F I C I E NCY IN SF Ab SCOUENCER AT DAVIS-BESSE I CORPAUTH

'OLEDO EDISON CO.

DATE 1980 TYPE O

MEMU LTR 4/LER B O-O b3 R TO U.S.

NRC. RE GION 3.

DEC 1.

1980.

DOCKET S0-346.

~l Y P E *-,> w R. MFG--bLa. A E -6 E CH. DCS NO.-6012120490 AVAIL AVAILAblL]lY NRC PULLIC DOCUMENT ROOM. 1717 H STREE1.

n' AS H I NG l ON.

D.

C.

20b36 (OS CENTS /PAGE - MINIMUM CHARGE S2.CO)

ABSTRACT D AT E OF EVtN1 - 070460.

POWER LEVEL - 000%.

CAUSE - LOGIC DEblGN E4ROR.

THE RESULTS OF THE IN T EGR ATED SAFETY FEATURES A CT U A T I UN SYLTEM (SFAb) TEST INblCATED A PRUbLEM IN THAT SOME OF THC LUG 1 C AODULC 5 UN SEOUCNCER STEPS 2.

3.

4, AND 5 TR1PPED HEFORE DE ING M LOCrsE D BY THE SEQWNCER DURING AN SFAS ACIUATION COINCIDEN1 w !T H A LOSS OF OFFblit POWER.

THIS COULD RELULT IN AN UNDESINtD ltSTANTANEOUS L O AD I tsG OF THE EMERGENCY DIELEL GENERATOR.

THE CAuSE 15 A Dh51GN DEF1CIENCY.

1HE UNLIKELY COMblNAllON OF ESCNls HAD MOT BEEN ACCOUNTED FOR IN THE LOGIC DEulGN.

Iht SAME $1GNAL THAT TRIPS THE ACTUATIGN OUTPUT MODULES ALSO STARib THE SEQUtNCER wHICH THEN 1 RIES TO BLOCK THE QUIPUT faUDULL LO lHAT 1i CAN LOAD THE EMERGENCY DIESEL G ENt.? A T O 7 wilhoul DVENLLADING IT WITH SIMULTANEOUS HIGH SlARllNG TORGudS.

THE CONTROLS wtRL MODIFIED.

COMPONENT CODE I NS T R U-I NSl Ru4 EN T # 1 I ON AND CONTROLS SYSTEk CODE l b-t- N G N R D SAFE 1Y FEATR INSTR SYS 26/b/0u00001-0000020//

2 ACChbblU') f ?O.

D O2 L l tO ba6 2 llTLE F IR E IN b!cLEL GENERATOR EXHAUSl PIPE AT DAVIS-bESSC 1 CDkN UTH TOLEDO CalSON CO.

DATE 1.960 TYPt O

MEMO LK W/LEn 60-071 TO U.S.

ARC. REGION 3.

OCT 21, 1960. DOCKET 50-346.

T Y P E -P e/ R.

MFG--Bbh.

AE-EECH AVAIL A VAIL Ab lL I T) - NHC PubLIC DOCUMENT RDOh. 1717 H STREET.

C.

PLibb (Ob CENTS /PAGC -- MINIMUMrCHARGE KASHINGlaN.

v.

SE.OO)

AbblRACT LATt OF LVEN1 - 0%20L0.

PontR LEVEL - 000%.

CAUSE -

TURuDChAsGEn F A I L(;R E.

wHILE TESTING DIESEL LENERATOR (DG) 1-2.

T t-E DPLWA1CR NOTLL A dVRGING 1N TH6 tNG]Nb.

HE THEN DETECTED b:ca NE. tAL W JN LC.nNING THZ cNGINC. DISCOVERED lhE I b4.A I U i A k G L h C AL iht L L U 6. !NC AED.

00 1 -2 wAS If6.EDIATELY I s A N c. ~,. AhD Iti #1 ht bWIGADE eAS CALLED.

IHC F1RE aAS CUNIAlhtL IN lac rOl4GLI PlsINL AhD WAS E X T I NGU I SME D AS SOON A5 it L D I E b t. L LAS L1L-GEU.

1HE 1UAHOChAHLEN FAILED RELEASING LJ.!ILAlINC JI L INIO THE "AhAUST CNAhbtR OF THE Ur. l T.

THE HIGH

.:)m.ubl IL! 6 c: A rch d ILN11CD The O!L LAub1NG A FIRE INSIDE THE E mnUbl FIFL.

THL luhJOChARLth / h ',; AFTER-COCLERb *ERt werLACr 2.

tre LuLdlCATING CIL AND DIL FILTLAS WERE CHANGED.

LuvuNENT CJUL c b C INE

_N C 1id S. I N T E LN AL Car 4UST 10 h S4 S i t i' CCDE t t-E f.tM LENLRATCm Svb 6 CCfsTRCLL i o /t / O O G C C L I -C G L OGI O / /

ACCEbblON ND.

00101604t3 11TLE blESLL L e h t R AT OR LibAblED AT DAVlb-BESSE I CLNPAUTH ICLEDL EJ1 BON CO.

RATE 1930 1reE O

e.t M O Ll4 e/LLs b v -D ub FC c.S.

NHC. REGION 1.

SEP E2.

1G60. D3CKET bG-240.

l 're t - W i<. MF G--S L h. AC-bECH AVAIL AvnlLAblLIT) - NRL PUcLIC DOCUMEN1 RUUM. 1717 H biLEET.

AASHINGlGN.

D.

C.

2Obbb (06 CLhlb/PAGE - M1N1 MUM CH /4R G E S2 00)

AbblAACT D Al t UF tveN1 - CO2660.

POWER LEVLL - OOC %.

CAUSE - SERVICE RtPhELLN1ATlvI DlbAuLED ESSENTIAL OUb.

CONTROL ROOM OPERATORS NOT ICE D IHAT Tht b4LAALR PCSI T ION INDICAT1ON LIGHTS OF C1, THE

• 100 VAC E b5EN 11 AL DUS. HAD GONE UUT.

THE LOSS OF POS1110N INDICATICN C AU bC D 1HE LObb OF CONTROL POWER 10 lHE bHEAKERS RENDERING lHE LMLRGbhCY DIESEL GENERA TUR (EDG) 1-1 I N OPtiR A BL E.

T HE SlATIGN ENTERED THE ACTION STATEMENT OF TECH SPEC SINCE NEITHER EDG nab OPERASLE.

A SERVICE REPRESENTATIVE FAILED TO STAY a11HIN HI S AUTHORllY.

HIS MIS 1AKE WAS OPENING THE SWITCH IN THE C UL I CLE WHICH CAUSED A LOSS OF CONTROL POWER TO lHE t

y -

- y

,m

3 CONTINUATION 1

PAGE 234 2 6 /b/0 0 000 01 -00 0 0020 //

ENT 1RE bus. THE SHIFT LUPERVISOR RECLOSED THE SW1TCH AND ALL BREAKER PO S 111 ON INDICATION RETURNED.

T Hti SEVER 1TY OF T HE EVENT WAS REVIEWLD WITH THE.REPRESENTATIVf. AFO HE WAS DISMISLED FROM THE SITE.

.COMPONCNT CODE CKlDRN-LIRCulT CLOSERb/INTERRUPTEAS SYSTEM CUDt LE-LM[hG GtNERATOR SYS & CONTROLS L

06 /b / 0 0000 01 -0 0 0 00 20 / /

4 ALCLS$10N NO.

0 0Z 0160 41 t2 TIlLE DIESEL BENE R AT OR DAMAGE FOUND DUR I NG MAINTENANCE AT DAVIS-BESSE 1

CORPAulH TOLEDO EDILON CO..

DATt IveO lYPE O

MLN.O L1P W/LER 6 0 - O t,9 TC U.S.

f 4W. REGION 3.y OCT 2.

1960.

DOCKET 5 0 - 3

• t./.

1 YPE-PW R. to 6 --S L c."

A E -D E C H AVAIL AVAILAblLITY -NAC PUBLIC DOCUMENT ROOM. 1717 H STREET.

wASHINGlON.

D.

C.

20Sbb -(06 CENTS /PAGE ~~ MINIMUM CHARGE st.ac)

AuSTRACT D AT E OF EVENT - O *s 0 2 3 0 '.

POhER LEVEL - 000%.

CAUSE -

S EL F -L G U5E N i l6 OF r$ LL 15.

MAINTENANCC PERSONfEL PERFORMING AN OIL C M A M. E ON DitbEL GENtRATOR (DG) 1-1.

FOUND A BOLT FRAGMENT IN THE CR ANesCA SE SUMP.

THE SuuRCE WAS A 5/6 INCH BOLT IN THE ND.

2 (UPPER) IDLE 4 GCAR OF lhE TURuGCHARGER SPRING LOADEG DhlVd CEAR ASSEMBLY.

lHtRE VAL AL50 SURFALE DAMAGE TO LEVERAL TLE1H l t.

THE GCAR TRAIN ASELMcLY.

ThC CAUSE v.AS.THE 5EL f- -LO Ob t f l ?4 OF THE FLUR L/O INCH SCLTS THAT HDLD THE NO. 2 I t>L c R GCAR ro THE supr'O R 1 SPlbER OF THE TURBOCHARGER SPRING GhlVE A b bEMLLY.

A NEw bPRING DKlVE t.SSEMBLY *Ab INSTALLED AND MCD1F1CD IO WOV1DE PilS 1 T 1 VE bOL1 LOCKING.

CO @uisLNT Coat

.iNG I t.E -E rsG I N ts. I tsT ei hN AL CO MOU 51 ] Q td LYb1EA CUJE d t-t9*.C K b uCNERATOk SYS L CONTROLb 2b/a/0000001-0000020//

5 ACCcth10N NU.

0 0Z o l bv c 2 t.

TITLC DG CXHAULT O v014 OM buPPORT DL F IC I E:s1 AT DAV15-E,ELLE I COWAUTH TOLEDU EDabON CO.

t DAlC 1960 IlYPt C

He *J LlA W/LEh 6 0-0 E2 TO U.S.

NRC. RE G ION 2.

JUL 22, 1980. DOCNET r

50-24L.

T YPC -P !k. MF C --b L n. A E -b d CH n'ALL.

A\\AILAr!LllY - NRC FU;3L I C DOCUMENT 400v. 1717 H STREET.

• ALH]r,elDN.

a.

C.

Lvbbb (uc C:Nii/PAGE -- r If 1VUM CHIdCE 1.00)

' L 1 :- C I J4T; RF a=tI - 0 t O 'I t L.

P U v. E R LEVEL - 000..

CAUSE - DELIGN L,404.

L u:.1 % ThE REVIEW OF 1hE SLlelC CALCULATIONS 11

• AS b i_ T t, v. I N L.., TrAT l hi L Ati ALL T D L C i v. u k 4 Lc lHE E f E N GCN C Y DIZ5EL ScNLinluwb C*:AIFl AN OvtRET4tLSLO LotsD I T ION AT THE EAHAUST

..,. c t_ c h.

Tnt L,= U '., t l '. DESIGN OtFICILNCY.

1Hd Ph:5ENT SUPPOR10 ALLDn 100 t.u tr-S I,i bb AT TPE t A H /, U 51 NOZZLES.

FCA bO-17E hlLL

%L A& Lt!.INTEJ DU41NC Thib REFUELING LUTAGt TO AUD SUPPURlE AND ALbD CHt N GL lHc E M ANSION

,,,D A N T b AEOVE THE NOZZLES.

LOwuNEN1 COui b bHOn 1 -LMU C K S UP E RC LL UR L AND buPPCA15 LYbIEM CUJE 6t-EMEkb uEuRATC, SYb & CON 1% LL 26/d/0000001-0000020//

c ACCtbblON f 0.

0020159115 111Lh I Nbl ANT ANbLub LOAUING OF DIEbELS 15 PUSSIBLE AT DAVIS-PESSE 1 CU<PAUTH TOLrJU Eg 15 0;, CG.

CAlt 19ev lYHC O

.: E IA U L lR n/ LEA LO-Ob3 10 U.S.

NkC. REGICN 3.

JUL 22.

1580. LOCKET SL-346.

T YP E -PW R. f4F G--6L W. A L-b t CH AVAIL AV A I L At31 L I T Y -

'R C PUULIC DOCUMENT RDOM, 1717 H STREET, WASHINGTON, D.

C.

20555 (06 CENTS /PAGE - MINIMUM CHARGE S2.00)

ABST4ACT

~

DATE OF EVEN. - 070960.

POWEk LEVEL - 000%.

CAUSE - LOGIC DELIGN DEFICIENCY.

1HE INTEGRATED SAFETY FEATURES ACTUATION SYSTEM (SFAS) TE S T lisO ! C AT ED ThAT SOME OF THE LOGIC MODULES ON SEQUENCCR S I LP b 2.

3.

4.

AND b TRIPPED BEFORE BEING BLOCKED BY THE SECUENCER DURING AN 5FAS ACTUAllON COINCIDENT WITH A LOSS OF OFFSITE POW ER.

THlb COULD RESUL1 IN AN UNDESIRED INSTANTANEOUS LOADING OF THE EMERGENCY DIESEL GENERATOR.

THE CAUSE IS DES IG N DEFICIENCY.

THE UNLIKELY COM61 NATION OF EVIINTS

6 CONTINUATION 1

PAGE 235 1

28 /S/ 00 000 01 -G0 0 00 20 //

WAL NOT CONS ID ER ED IN THE LOGIC DESIGN.

THE CONTROLS WILL DE MODIFIED.

COMPONENT CODE I NST RU-IN51 RUMENT AT ION AND CONTROLS LYSTEM CODE IS-ENGNRD SAFELY FE ATR INSTR SYS 28/b/0000001-0000020//

7 ACCESLION NO.

00Z01b4639 111LE H DT H DIESEL GchtRATOGL INDPERAbLE FUR TWENTY MINUTES AT DAVI5-bES$E 1 CORPAUlh TOLEDO ED150N CO.,

TOLEDO. OH DALE 1980 TYPE O

REMD 4 PGS. L1R h/LER 79-126 TO NRC OFFICE OF 1 L E.

REGION !!!.

JAN.

5, 1950. DOCKE1 50-34b. T 9E --P n R. MFG--uCW. A E -U E CH AVAIL AVAILAEILITY - NkC PUELIC DOCUMENT ROOM. 1717 H STREET.

WASHINGTUN, D.

C.

20bbt (OS CENTS /PAGE - M I NIMUM CHARGE 3.L. O O )

' abs 14ACT DALE OF EVENT - 1E0979.

POWER LEVEL - 000%.

CAUSE WRONG BREAKER RACnLD OUT.

DURINb THE DIE 0EL TENERATOR (OG) MONTHLY TEST. DC 1-1 E XP E R I L NC E D LOAD Sh!NGS Ab THE LOAD WAS INCREASED AbuUT Iv00 Kw AN D ACAIN nHEN THE LOAD WAS INCREASED TO 2500 KW.

DU41NG

v. A I N 1 LN AN C ti INVESilGAllON. AN ELECTRICIAN MISTAKENLY Rt.CKED UUT l ME WWONG ERtAKER whlCH MADE DG l-P INOPERABLE.

FOR 20 MINU1EL l t.E STATlOrs WAS WITh0Ul A DG.

DF F -SI T b POWER hAS AVAILAbLE TO $AFElY $Y5itMS.

THE CAUSE OF THE LDAD SWINGS MAY PUS $1 SLY BE FROM AN ELEClhuN1s GOVERNOR OR VOLTAGE REGULATOR PkO6LEME.

Uv ER V A INl E N ANC E WORK ORDER 79-3230. T H ti LGAD SalNG WAS I NV Ld T I G AT EL.

S1 5061.01 nA5 SUCCES$ FULLY RUN LATER IN THE D AY. AND bG 1-1 wAS DECLARED OPERA 3LE.

POKER SYSTEMS WILL INVES11 GATE THE GGVERNOR PkOELEM.

SAFCTY IAGGING PROCEDURE TRAINING WILL bE ESTAFLISHLD.

COM00NEN T CLU2 CMlORK-CINCUll CLLSLWL/1N1r.RWUPTERS SYSTLM CdJi EE-EMERL GENE % AT Ok LYS & CONTROLS 26/5/C000001-0000020//

O ACCES5!ON NO.

0020140791 11TLE 01ESEL Gt' Nt n A T OR FOUND 1O 6E INOPtRAGLE Al DAV15-UES'E 1 CURPAUTH TOLEDO cul50N CU.

DATE 1979 T ) PE V

t-E t ' u L Th w/LLh 7 9 -O A 6 TO U.S.

NhC, REG 1ON 3, APR EL.

1979. DOCKET SG-2*v.

T Y P E-P s. v ir t' + k. AE--Lbch CON 1 % OL --02 %0 2

, vole A V A I t t. c : LITy - NRL PJEL1C LOCUMENI R O 3f/. 1717 H ETRttT, 4ALFINGiA G.C.

2(blu. (Ca /W6E -- M I N I F.U f.. CKAbGE 12 00)

LI,ACI DATL LF c_ V ; ' 1 - 030C7'.

v3biR LEVEL - 072%. CAVEE.-

TUnr0Ct A CCA eiAhlNL FAILU4E.

Al 1(30 DUdlNG SUMVEILLANCE ftS11NL L.u.

1 -1 c;C A:

• M I NG LOUD UNULUAL NOISES.

LL~VEILLANLE

,:.6 0 1 N L n t N 1 L F UL r I LL ED BY PROVlhu UPERAEILITY CF I N L t J N L t?.T C'FSilt At tLt C1k lC AL sower SOURCES AND EY t

Ddt.tv5ThAllht OdcAAPlLITy O.

R h t. A A N I N G b.G.

1-2.

D.G.

1-1 btCLAAEb 1 AOPi n A L LL ULE TC TUWLLCHANGEk btA%ING FAILURE.

LN11AE T Lhnt tH AR G%

6. t S hEPLACED ANL D.C.

1-1 DECLARED OPERABLL A3 131b MOUh5 GN APhlt 1.

1979 RAILED TURdOCHARGER RElVRNED IU MAhuFtC1bAi% FU4 ANALY515.

CLt4 PONE N T CDDL h tL w E R -b L D n E kS LYSTEh CODE Et-LMERC CdNERATDR LYL 1,

CONTHOLS P b /b / O G oub v 1 -G G 0 0 0 20 //

9 ACCEEblJN NC.

Octo146 TLC TITLE RIt$EL E ct t % AT U4 I N;PE R Ar.L E AT DAvlL-BESSE I tb iP Aul e1 10LLDO t.D I S ON C3.

DA 1979 IYPL O

tEMU L IR n/LLR 79-0 O 10 U.S.

NRC. htGIGA 3.

Ar 4 12. 1979. COCKE1 8

50-346. l Y P E-PW R, MF b-o+ W. AE-bkCH CON T R O L-02 5531 AVAILADILITY - NRC PUbLIC DOCUMENT ROOM, 1717 H SlREET.

AVAIL'

~

W AS Hl is G l ON D.C.

20bbb. (OS /PAGE -- MINIMUM CHARGE 52.00)

ADS TR AC T D AT E CF tvENT - 031079. P3*ER LEVEL - 0 6 7'4. CAUSE - SPRAYED

• 1TH wA1CR DLAING A 1EST.

wHILE CONDUCTING SURVEILLANCE TEST ST 6016.07. FIRE PsOTECTION SYSTEM AUTOMATIC SPRINF.LER SYSTEM.

W AT E R FROM INSPECTOR'S TEST VALVE DEFLECTED AND SPRAYED DIESEL GENERATOR SLIP R I NG S. DUTPUT CABLE CAGINET AND REGULATOR C AS INET S.

Al 2200 EMER GENCY DIESEL GENERATOR 1-2 DECLARED 1NOPERALLE.

AEDUNUANl CCG 1 -1 AND THREE OFFSITE POWER SOURCES

9 CONTINUATION 1

PAGE 236 33/

0000001-0000020//

WERE AV AI L ABLE.

DEblGNATED AS PERSONNEL ERROR.

ON 3/17/79 EDG l-P AND CABINETS WERE DRIED.

AT 2000 HOURS GENERATOR WAS SUCCESSFULLY TESTED.

MODIFICATION TO ST - f ",16. 0 7 HAS BEEN

~*

LUSMITTED TO CORREC1 THIS UEFICIENCY.

COMPONEN1 CODE GENCR A-6;NE R AT DR S SY 2nT E M CODE EE-CMCRG GENER AT OR SYS L CONTROLS

~

38/5/0C00001-0000010//

10 ACCESSION NO.

0010142292 TITLC DIEbEL GENERATOR HOOM TEMPERATURE EXCEEDS LIMIT AT D AV I S-B E S SE I

CURPAU1H TOLEDU ED1 BON CO..

TOLEDO. CH DAll 1971-

~{

TYPE G

?

MEMU 4 PGS. L1R W/R O 76-lG7 TO NRG/ OFFICE OF 1 L E.

REGION 111. NOV.

27.

I V7 c. D O CK h i 60-346. T YPE --P 4 H. MFG--6Let. AE GECHTEL i

AVAIL AVA IL A C ILil Y - NRC PUBLIC DOC Uf> E N 1 RsUM. 1717 h bTREET.

.WASHINGIUN.

D.

C.

20h5b -(00 CLN1S/PAGE MINIMUM CHARGE SC.00)

W ABSTRACT DAll OF tVENI - 1 G3176 '.

PGwER LEVEL 3%.

CAULE - OUTSIDE AIR DAMPEN LINNACE OUT OF ADJULTMENT.

DURING A DIESEL GENERATOR 1-2.

1HE< ROD

• 1EMPERATURE ROSE 10 llOF.

THE h.L N 1 H L t TEST ON

"=

O UT S I DE AIR D A kP t. woULD NOT UPEN.

DG I-2 WAS DECLARED INOPERAELE.

T HE L A H-E W LINKAGE rsAS OUT OF ADJUblMENT AND BOUND l t.

A LUIDt.

THE LIfMAGE WAb DlbALSEMELED AND RE ADJUSTED.

THE OAv.PEh kab bl404ED blA T1Mts.

THE TEST WAS COMPLETED. AND UILbEL LtNL h AT O%

l-2 UhCLARED OPEkA3LE.

COMPONENT CODE V AL VOP-V ALV E O PE h A1 Lh b SY b'I E M CUJE EE-EMEb G GE NLR AT Ok EYL L CONTROLS

& b /b'/ G C OC O O I -C O O LO 20 //

11 ACCESSION NO.

C C2 01417

• 7 TITLE REQUlHED TLSilNG NO1 PEWFURUED ON D I E SEL GENERATOR AT s AV l b-S L bbE 1 CORPAU1H TCLEDO EDISON CO.. 1GLEDO. OH DATE 1978 TYPE O

i4L v.O 4 PGS. LTR v /4 0 76-C96 10 NR C, OFFICE OF 1 L E.

REGION 111. OCT.

11.

197F. D0LALT 50-246. TYPE--PwR. MFC--ELw. AE--bECHTEL AVAll 4VAILAtiLllY - Nk C PUt-LIC DOCUPENT ROOM. 1717 H STWEET.

n ash a N( T L'.

O.

C.

20bbb (00 C'ihlb/PAGE -- MINIMUM CHARGE E1.CC)

ALb1kACT Drl t i t' tvL*:1 - 0%147L.

POWth Lt 4 L - 90%.

CAubE - OPEhATU7 t-6 N.

L-I L *,..

GhM.%1DA 1-1

.. A t LLCLAREO INDPfkAsLE ON 9/12.

nEVENTAIIVE

r. A i N 1 E N A N C t.

ThE buRVCILLANCE Al w b; ecuwb FUh s T b l l :~ nLLLIALJ 1.Y TELN LPtLL

e. A b NOT Peh FDRkt b UNTIL 9/14 AT 0 1.< *

-J.3 6 5.

UPOf. 015COVL4Y LF THL UNibblDN. lHE LHIF T ' FOREf

• AN I t-a.ic L 1 A l L L Y MNANt: L TD eLb t'ON ti ThE RELUlhEU lESTING.

1hl bhlF T F uh t N A;, hAD F AILED TD GLCOLNil; THAT T n b' bU;VEILLANCE ItbilNC vAS ~ E uu l n'Z L.

CO WJNLul CDOu Z 2 2 2 4 2 -C t m PONc N T CODC NOT APPLICAELE C 'r S T L t. CLst EL-ttsL e OLN:R AT Ga byb L LGN1htLL I c /t / 0 0 C O L O I-O L O LO 20 / /.

IF ACCEbbloN NO.

D OZ O I 012 c) llIL; H20UIheD TES11NG UN DIELCL GENLhATUk NOT PERFORMED AT D AV I S -f: E.< bE 1 CORPAU1h 1CLLDO LbibON CO., IDLEDL. OM OATL 1976 TYPE O

?>.E M O 3 Pbb.

L1h a /< U 7c-Le1 1O N4C Or;F I CE OF 1 L E.

kEGION 11I. AUG.

I b.

19)e. D U LA t 1 bC-a46, l'rPC-+h4.

MFG--6LW.

AL--bECHTEL AVAIL AVAILAblLITY - NRC PUEL I C DOCUMENT 600M.

1717 H STRELT..

WASHINGTUN, L.

C.

2Obbb (06 CENTb/PAGE - M 1 N 1 f'.UM CHARGE 52.00) abs TR ACT D Al t OF LVENT - C71978.

POWER LEVEL - 0%.

CAUSE - PRUCEDURAL D EF I C I ENCY.

D UR I NG AN NRC ON SITE AUDll ON 7/19/78. 11 WAS DlbCOVERED THAT SURVEILLAf4CE RECUlREMENT 4.6.1.1.2A4 MAS NOT ADE GU A1 ELY VtNIFILD bY SURVEILLANCE TESTS.

THE DIESEL WAS STARTED AND TE ST ED BY 1HL SURVLILLANCE TEST SUT THE TIME TO 900 RPM WAS NOT ls.i AS UR E D B Y THE TE51.

THE CAUbE OF THIS OCCURRENCE WAS A. PROCEDUR E INADEOUACY.

A MODIF1 CAT 1DN *Ab WR1TTEN AND PERFORMED A1 1915 HOURS ON JULY 20.

1978. hMICH VERIFIED THE-SUR VE I L L ANCE R EQU IR E MEN T S.

~,.

~

20/5/0000001-0000020//

12 CONTINUATION 1

- PAGE 237 COMPONENT CODE E NG I N E-ENG I N ES. l N T E RNA L COMBUST I O N SYSTEM CODE EL-EMER G GENER AT OR SYS C CONTRCLS 28/b/0000001-0000020//

13 ACCESSION NO.

00201396E4 TITLE DIESEL GCN E R AT OR FAILS TO OPERATE WITH PROPER FREQUENCY AND VOLTAGE AT D AV I S -UE LSE I CORPAU1H T OLEDO EDIbON CO..

10LEDO, OH DATE 1976 TYPE O

MEMO 3 PGS, LlR W /R O 76-002 TO NRC OFFICE OF 1 & E, REGION III, JUNE db.

1976. DO CK E I

$0-346.

T Y P C --P A R, MFG--bCW. AE -BECHTEL AVAIL AVAILAblLITY - Nhc Public DOCUMENT ROOM, 1717 H STREET, WASHINGTON, D.

C.

20bbb (08 CENTS /PAGE -- MINIMUM CHARGE

$2 00)

C%.

CAULE - PR IM ARY AUSlR AC1 D A1 E CF EVEN1 - 96047E.

POWcR LEVEL POTLNTIAL PUSd F A I L U.i E.

AHILE PERFORMING SURVEILLANCE TESTING, DIESEL GENEhATOR l-1 FAILED TO CPERATE WITH PROPER FREQUENCY AND VOLIAGE.

THE CAUSE WAS FAILURE OF A PR l F AR Y POTENTIAL FUSE FDR THE DIESEL GENkRAlG4.

THE PRIMARY POTENTIAL FU5E FOR DG l -1

1. AS R E PL AC ED.

THE DlLSEL GENERATOR MON 1HLY TEST WAS COMPLETED.

COMPONLNT CODE ENGINE LNGINES. INTERNAL COMBUSTION SYSTEM CODE EE-EMERG GENER AT ON SYS & CCNIROLS 26/b/0000001-0000020//

14 ACCESSION NO.

00/01392-9 TITLE DIESEL bcNE R AT OR LOAD FalLb 10 bT AY CONSTANT AT DAVIS-EESSE 1 CORPAUTH TuttDO LulbON CO.,

TuuEDO, OH DATE 1976 TYPE O

MEMO 3 PGS. LlR

t. /i b 7 6 - L 4 'i TO NRC UFFICE OF 1 L E. REGION Ill. JUNE 1.

1976. DOCNE 1 50-340, T Y P E --P WR, MFG--BLw.

Ak--BECHTEL AVAIL AVAILAblLllY - Nh t PUELIC DOCUMENT ROOM. 1717 H STREET, W ASHI NGlON.

D.

C.

2055L (Os CENTS /PAGE -- MINIMUM CHARGE 52.00) 050976.

POWER LEVEL

- 0%.

CAUSE - ~NKNOWN.

A6STRACT DATE OF tVENT WHILE PERFORMING INE DIELEL QENERATOR REFUELING SURVMILLANCE TLST. ThL GENERAldh LOAD WOULD NO T STAY CONSTANT AND THE DIESEL GtNEwATGR AIR IN T As E LOW PRESSURE ALARM n' A S RECElVED.

THE CAULE Or 1Hib OCCU4RENCE ?L NOT NNOWN.

E ATE NblVE MAINTENANCE I t.V T.b T 10 A l l u t.d v' E C LGNDUCTED buT lHE ExxCT CAUSE WAS NOT siSLOvtRLD.

Al 041t t iC UR S ON "AY 14. 1970. IMt DIESEL 6 ta ; A l L, rwfIHLY lLtl uAt tE,vvLElLO. AND THE DIEbEL GENEWATOP

'nb OtCLAwEL DWRALL:.

LO %.LN1 CLLI C NC AN

-Ot l h Lb. I N ic AN AL COMbJbTION SY S I L M LODr c c - L '. t R C GLNL,ATO, 170 b CC N TROLL 26/E/Ov0v001-LOJ0VIO//

lb 4 ACCEbblDN 60.

U DZ O l 36 31 c li1LL D IE bd L GtNE h AT GW lvHBDLHAhGEh AEPLACED DUE TO ANTICIPATED F AI LUk E AT L AV I S -5E bb c 1

, COhFALTh TLLEDO EvibON CO..

ldLc00. On DATE 147L TYPE O

flEMG 3 PGS. LTR h/10 76-Ole TO NRC OFF I CE OF 1 L E.

REGION 111.

MARCn 7.

197c. D G CK E 1 b c -3

• c c T Y P E --P w R. MFG--BLw, A E --P E C H T EL AVAll A VA IL Ab l LI T Y - NAL t'U = L I C DCLUMENT ROOM, 1717 H STREET.

WASHINolus.

D.

C.

20 bu d (ut CEN15/PAGE -- MIN!!iUM CHARGE 12.0J)

AHS IR ACl D AT E OF evtNT - 02GS76.

PDwtR LEVEL -

74*..

CAUSE - COMPONEN1 FAILUNE.

Dux!NG liSilNG, DIESEL GLNERATOR l-1 WAb NOTICED TO bE MANINC UNUSUAL NCISLS.

1hE NL I SE WAS COMING FROM THE TUnEOCHAhGEh.

THC APHsRLNT CAUSE IS DELJEVED TO HE A COMPONENT FAILURE DR A D ES I LN /F ADR I C AT I ON ERHOH, BUT THE EXACT NATURE OF THE PROBLEM 16 NOl ANOWN 4T 1HIS 11ME.

THE TURLOCHARGER %AS

^

REPLACED.

COMPONEf 4 T COEE BLOWER-OLCwEh5 SYSTCM CODE EE-EMERv GCNLR ATGK bYS G CONTROLS 28/5/0000001-G000020//

16 ACCESSION NO.

00Z0134320 TITLS DIESEL GENER AT OR TRIPS ON HIGH CRANKCASE PRESSURE AT DAVIS-BESSE 1

~

^

26/5/0000001-0000020//

16 CONTINUATION 1

PAGE 238 CORPAUTH TOLEDO EDISON CO., TOLEDO, Oh DATC 1970 "E

TYPE G

MEMO 3 PGS, LTR h /R O 76-007 TO NRC OFF I CE OF.1"r -E, REGION 111, FES.

2.

1978. DOCKE T $0-346. TYPE "hRh MFG--BL

, AE SECHTEL AVAIL AVAILABILITY - NRC PUBLIC DOCUMENT ROOM. 1*sl7 H STREET, WASHING 10N.

D.

C.

20b45 (08 CENTS /PAGE - MINIMUM CHARGE 12.00)

ABSlRACI DA1E OC CVEN1 - 010978.

POhER LEVEL - 0%.

CAUSE - DIRTY VENT D IL COLLECTOR.

hMILE PERFORMING THE MONTHLY TEST. DIESEL GENERATGR l-1 TRIPPED ON HIGN CRANKCASE, PRESSURE.

THE TRIP WAS RESET AND THE 1ES1 COMPLETED.

THE CAUEE IS ATTRIaVTED TO A DIRTY CNANKCASE VENT OIL COLLECTOR.

T HE ?, COLLEC TOR WAS CLEANED.

T HE UNIT FOR DG l-2 hlLL BE CLEANED..

y COMPONENT CODE C t;G I NL-E NG I NES. I NT E RN AL COMBW$ TION' SYSICV CODE tL-EMEKG GENERATUh SYS & CONTROLS 20/b/0000001-00000E0//

17 ACCEbblON NO..

CUZO12207E o['

13TLE SURVCILLANCE TEST ON DIESCL GENERATOR NOT PERFORMED ON 1IME AT DAVIS-BEbEC 1 CORPAUTH I CL E DO EDISON CO..

TOLEDO. O.H -

DATE 1977 TYPE O

MEMC 4 PGS. LTR h/RO NP-33-77-1Cl TO NRC OFFICE OF 1 L E,

REGION 111. OcC. 27.

1977.'DOCKCl LO-346. 1YPE "wR, MFG--bCW, A E--StCH TE L AVAll AVAILAblLilY - NRC PU6LIC DOCUMENT ROOM. 1717 H STREET, ut AS H i tsG T ute.

L.

C.

20S45 (OS CENTS / PACE - MINIMUM CHARGE 12 00)

ABSTRAC1 D Al t OF tVCNT - 120177.

POaER LEVEL - O F..

CAUSE - PERSONNEL EAROR.

DIESCL GENERATOR l-1 n' A S DECLARED INOPERABLE AT 0350 ON 11/30/77.

T CC H SFdCS REOUlat TE511NG DG l-2 WITHIN 1 HR AFTER IMC LOSb AND dVEhY O HRb THEREAFTER.

THE TEST MAS NOT PERF0@Cd U tv i l t 1000 UN 12/1/77.

ONE OTHER IIME THE TIME

+>EklOD EACEEDED 1hE RtCUIRED TIME INTERVAL.

THc UNIT WAS IN r%1 ST ANDE /.

FAILURE WAS DUE 10 PdRSONNEL ERROR.

TJ^E SHIFT-

DREM N FAILEO TO HECOGN!4E 1.H A T THlb buRVE!LLANCE wh REOUIRED.

Cuv P.mC N T CODL 2 a. ZZ Z -COMPONE NT CODd NO1 APPLICAbLC SYSTEA. CODd E E - ua t N G CENrR AT OR SYS & CONTROLS ES /c, / c c J b O G 1 -C 0 0 00 E 0 //

Ib ACCE L L IJN Nu.

O i; u l E P s ?S T1TLi 3IELEL G2 :d -4 Al M 1iIPb UN UVE M PE E D AT DAVIS hCLSE I CO h ui, IDLEUU EblLIN LU..

IULLDL. OH DATE 1st?

TYPE u

NtVO 4 PGd. LTh W /A O NP-La -7 7 -& L TC M C OFFICL OF 1 L L.

REGIC.N !!!.

OtC.

16.

1977. DOC 4cl dC-545.

l Y D E --P a R. M F G L w. A d --E E C H T E L AVAIL A VA IL Ac I LI T Y - NRC PUbLIC LDLUMENT 400M.

1717 H STREdT.

A Abr-I N G li 6N.

D.

L.

20S46 (vn CENIE/PAGE -- V I N I r/U M CHARGE 12.30)

ADS 1sACI D/TE OF tVENT - 112977.

POWER LEVEL - O!;.

CAUSE - 1MPROPER S a l l C P.

LE1 TIN 5S.

Duk lN G A TCPDORARY LOSS OF STATION POnER.

DIESEL GENtRATLW 1-1 STARTtD uuT FAILdD TO SUPPLY POWER TO EUS Cl SECAUit T ai D I ESEL TRIPPED ON CVERSPEED.

THE CAUSE WAS I 'e P R O P E R SETTINGS CF THE G O V t-R NOR nlGH SPEED L1M!T Sw1TCH AND Thd OVERSPEEa TRIP SallCM IN 1hE lok END OF THE ALLOWED RANGF..

Thb SalTCnCS

• LR E RcSE1 AND THE DIESEL GENERA. LOR PROVEN O PE R A LL t-CN 11 /2 / 'r 7.

DG l -2 EPEED bwlTCHES WERE ALSO RELE1 ON 11/2/77.

.COMPOSENT CODE MECFUN-k:CHAfICAL FUNCIION UNITS SYSTEM COJE SE-EMCRG GENd~t AT OR LYb & CONTROLS 23/b/0000001-0C00020//

19 ACCEbblON Nu.

0 02 0123 C27 T 11 LC' SFAS MANUAL IN il I AT ION / EMERGENCY DIESEL GENERATOR SEQUENCER DEFICIENC) Al D A V I S -B E S SE 1 CORPAUTH TOLEDO EDISON CO..

TOLEDO, OH DATE 1977 TYPE O

MEMO 2 PCS, LTR w /R PT TO NRC DIRECTORATE OF REGULA10RY OPERATIONS, REGION 111, M A RC H 23, 1977. DOCKET 50-346. T Y P E --P W R. MFG--ECW, AE--SECHTEL

,.~.

20/S/0000001-0000020//

19 CONTINUATION 1

- PAGE 239 AVAIL A VA I L AB I L I T Y - NRC PUBLIC DOCUMEN1 RODR. 1717 H STREET.

WASHINGTON.

D.

C.

20b45 (06 CENTS /PAGE -- MINIMUM CHARGE 52 00)

AbSlRACl D AT E OF EVENT - 022477.

POWER LEVEL

-NA.

CAUSE - DESIGN DEFICIENCY.

D UR I NG PREOPER ATIONAL TESTING. IT WAS FOUND THAT IF THE SAFETY FE ATURES ACTUATION SYSTEM 15 MANUALLY INITIATED AND, SOMETIMt LATER. OFFS 11E POWER IS LOST. THE EMERGENCY DlbSEL GENERATOR LOADS wCULD BE APPLIED ALL AT ONE TIME AND NOT SEQUEN11 ALLY LOADED.

1HIS CONDITION AROSE IN PART FROM THE R LC LN T LY ADDED LOSS OF 6US VOLT AGE RESET SIGNAL SUPPLIED TO THE SEQUENCER LOGI C.

THE MOMENTARY MANUAL 1 RIP BUTTONS ARE BEING RLPLACEv UY h2CHANICAL SEAL-IN TYPE TRIP BUTIONS.

THIS WILL PROVIDE THL NE CE S SA RY MANUAL TRIP SIGNAL TO ALLOW THE SEQUENCER TO PR OPER LY LOAD lHE DIESELS.

COMPONENT LODE I NSTk U-I NLT hue ENl Al I ON AND CONTROLS SYSlE M CODE EL-LMERG GE NC< AT UR SYS L CONTROLS 28/5/0000001-0000020//

20 ACCESSION NC.

00Z0119790 TITLE D IE SCL blNERATOR TEAT EXCHANGER TUOLS CURRODED AT D A V I S-B E SSE 1 CORPAUTH lOLEDO EDIdON CO.. IOLEDO. Oh DAll 1 *>7 6 TYPE O

MEMO 2 PGb. LlR w /R PT TO NRC DIRECTORATE OF RtGULAlORY OPERATIONS.'

REGION 111. OCT.

26.

1976, DDCKET 60-346. TYPE--PWR. MF G --B L W.

Ai--cLCHTEL AVAIL AVAILAblLITY - Nhc PUt?LIC DOCUMENT ROGM. 1717 H STREET.

WASMINGlON.

L.

C.

20d4b (Gb CENTS /PAGL -- MINIMUM CHARGE L2.00)

ALatlRACT C AU SE - I NP b OP E7 1E511NG aY VENDOR.

T HE EMERGENCY DIESEL GENERATbn JAO(L1 COOLING WATER HEAT EXCHANGERS WERE RECEIVED ON u ll E 4/2L/74 F AD M chuCd GM IN A CONDITION FOR LONG -T E R M STORAGE.

R t CE IP T INSPEC110N REVEALCD RED LEAD PRIMER ON THE INSIDE NDZZLLb #!hlCH WAS NOT ACCEPTABLE.

WHEN THE CHANNEL HEADS WEPE R EY. CV E D TO REMOVE THE PRIMER. THE TUBE SHEET AND IU6ES DF LACH V41T wtRE FOUNO IN POOR CONDITION.

INSPECTION REVEALED OVEhALL CURROSION AND GRLSS FOULING OF THE 'UBEi AND CHANNEL HEAbb DUE

'O DIRT. SCALE. ERD 4EN GLASS AND OTHER FOREIGN t'. A T T ER.

lHE CAUSL IS BELIEVED TO 6E SOME UNIDENTIFIED SUSb1ANCE IN # Al h R DURING VtNDOR lESTING.

BOTH TUBE SUf!DLES r1AD TC er R E PL AC E U.

N.

e

. (-

TDLEDO a

EDISON LOWEU. E. ROE v %.....

ecahtees Deve4eoment

'Ug*****

Docket No. 50-346

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License No. NPF-3 j

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f N24 January 20, 1978 g W..g g,-

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Serial No. 414

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'\\ g Director of Nuclear Reactor Regulation Attention:

Mr. Karl R. Galler, Assistant Director for Operating Reactors Division of Operating Reactors U. S. Nuclear Regulatory Ca=nission

" *'ashington, D. C. 20555 w

Dear Mr. Goller:

This ler.ter is in response te your letter c ~ Dece=ber 15, 1977, requesting co=pletion o f the ques,.aaire for Nuclear, Regulatory Coc=ission relisi.ility study of standby diesel units.

Enclosed is a completed copy of the questionnaire for the Davis..csse Nuclear Power Station Unit No. 1.

Also enclo.ced is a sheet identifying the individual you should contact on any follow-up cec =unications cencerning this questiennaire.

Yours very truly, l

F.nclosures l

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1 goo //s-O f A;'

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THE TCLEDO ED! SON COMPANY ECISCN PLAZA 3CO MACISCN AVENUE TOLEDO. CHIO 43552 U *(.

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License No. NPF-3 Docket No. 50-346 Serial No. 414 January 20, 1978 Contact for follow-up communications concerning questionnaire for Nuclear Regulatory Commission reliability study of standby diesel generator units

- for Davis-Besse Nuclear Power Station Unit No. 1:

Mr. Eugene C. Novak General Superintendent

^

Power Engineering and Construction Toledo Edison Company 300 Madison Avenue Toledo, Ohio 43652 Phone: 419)259-5370 S

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Are any foreign gases such as propane, freon, halon, carbon dioxide, etc. stored in the: Diesel Engine room?.

Yes No X

or adjacent buildings? Yes, 4No x If yes, (other than hand portable find extingu'ishers), then i

identify' gases and give approximate tank size.

-3 Gases N/A Vohdme (ft )

N/A

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Does control system automatically bypass, in emergency starting, any engine temporarily out of service for maintenance? Yes No X

If yes. then how many failures to bypass have occured?

l U.

Does the control system automatically override the test mode under emergency conditions? Yes. X No V.

Have repetitive mechanical failures occurred in any component part or subsystem of the engine, generator, or switch gear, etc.?

l Yes X No If yes, then which part or subsystem? Air start motors.

How many failures?

7 Give nature of failure. Air blowing by the vanes, air motor frozen 1

up or defective air motor.

f W.

Would periodic (yearly or'other) evaluation and/or testing by "outside experts" contribute significantly to the diesel-generator reliability? Yes No X

Give brief reasons for the answer. In house surveillance testing and procedures have proven to be very efficient in revealing problems.

Also, a preventative maintenance schedule is beine carried out as l

per the vendor's recuirements and suggestions.

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Give the accumulated time-load operating record for each diesel-generator unit from installation to the present

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(Running Hours):

Preoperational test Date 8/11/76 through 3/7/77 '

~

Engine Sury. Testing & :

Emergency Total

Serial No. :

Maintenance Hrs. :

and Other Hours :

No Load : Loaded :

Service Hrs. :

7 J

5 159

73-B1-1015:

40 114

!. 73-31-1018!.

174 5

124 45 777-2.

Surveillance test load (percent of continuous rating) 3.

Give the projected or planned time-load operation for each diesel-generator unit during the next 12 months.

Surveillance &

Emergency :

Total

llaintenance Hrs. :

and other :

Hours

Service Mrs. :

60 0

60 Provide the following summary of the periodic surveillance testing 4.

experience:

4/22/77 Starting date'of surveillance testing (OL date) a.

b.

Periodic test interval Monthly ana refueling.

22 Total number of surveillance tests performed c.

d.

Total number of test failures 3

0 0

failure to accept load failure to start 0

failure to carry load a

failures due to operator error failure due to eouipment not being operative during emergency 1

Other--3 y

conditions Supply a copy of the surveillance test procedures with this j]

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completed questionnaire.

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Additional Comments Most of the problems were encountered during initia1'startup and testing.

Problems have been resolved and the ' engines

. g have been reliable since then.

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General Suggestions Briefly give constructive criticism or suggestions as to improvement in reliability of the diesel generators. These remarks may cover tests, maintenance, practices, orders, policy, adjustments, etc.

A good preventative maintenance and s'urveillance testing program is necessary, particularly with the air start system.

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