ML20009C826

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

ML20009C826
Person / Time
Site:	Nine Mile Point
Issue date:	07/09/1981
From:	Ippolito T Office of Nuclear Reactor Regulation
To:	Dise D NIAGARA MOHAWK POWER CORP.
Shared Package
ML20009C827	List: ML20009C826 ML20009C829
References
REF-GTECI-A-44, REF-GTECI-EL, TASK-A-44, TASK-OR NUDOCS 8107220022
Download: ML20009C826 (15)

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Dockat No. 50-220L July 9,1981

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Mr. Donald P. Dise

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Vice President - Engineering

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c/o Miss Catherine R. Seibert 32 UI.1 q Jpg

- Niagara Mohawk Power Corporation 4% g'*7,,k9 N *Ms

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' Syracuse, New York -13202

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Dear Mr.'Dise:

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?Information Request Regarding Station Blackout, Unresolved L

Subject:

Safety Issue A-44, Nine Mile Point Unit 1 The NRC staff is currently addressing Unresolved Safety Issue (USI)

A-44. Station-Blackout. The purpose of this work is to establish the

' safety significance of an event resulting in 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 infomation that is being used in the USI analysis. Your interest and cooperation in the past have been appreciated.

i

At this time the USI A-44 effort is being directed toward determining the reliability of the onsite standby diesel generate s.

The enclosed questionnaire has been' prepared to provide accurate operating experience

to serve as-a basis for such a determ wation. 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.

4 Thequ;stionnaire(enclosure 1)-requestsinformationintabularfermand soliens data for the years 1976 through 1980, inclusive. There are four tables enclosed:

(1) Diesel Generator Operations Data, (2) Diesel Generator Scheduled Down Time Record, (3) Diesel Generator Unscheduled Down Time Record; and (4) Onsite Emergency Diesel _ Generator and Auxiliary Equipment Modification Record. Also enclosed are examples of completed tables as well as a clarification of what should be entered. Please j.

note that, although it may appear that only Licensee Event Report (LER) information is sought, data on all' diesel generetor malfunctions, independent of whether an LER was prepared,is requested.

i :

Please find enclosed LER documentation.(enclosure 2) presently docketed L

'for your facility. You are requested to review these and tn indicate if there are other reports which have not been enclosed. Finally, please find enclosed a copy of the appropriate portions of your response (enclosure

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8107220022 810709 o,, meg PDR ADOCK 05000220D i

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-OFFICIAL RECORD _ COPY usam a i-m-,eo g wac ronu ais oo-somacu oua.

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Mr. Donald P. Dise 2-

3) to our letter of March 6,1978 which requested 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 information, the completion of Tablo 4 should be considered voluntary. However, it should be noted that if operational and hardware modifications are not identified, the positive or negative influence of these features on emerg(ncy alternating current power reliability may be lost in the evalua. tion of the data. The expected effect is that our generic reliability estimt tes may be lower than that which actually exists.

The above information is requested in accordance with Sections 103.b.(3) acd 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 for emergency power systems, it is requested that your response be provided within 90 days of the receipt of this letter. However, if this schedule is inconsistent with priority requirements for other licensing work, I

please provide us with your proposed date of response within 30 days.

il 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 onsite alternating current power sources can be made.

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

DISTRIBUTION See attached list Sincerely, i

i thomas A. Ippotito, Chief Operating Reactors Branch 42 Division of Licensing

Enclosures:

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 u.-

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EXPLANATION / CLARIFICATION Table 1 Reason for'DG Operation and Scheduled Duration of Run: This column contains the different_ categories of diesel generater 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 each of the test categories. Also enter the number of diesel generator starts that are done for each type of test.. For example,:1f.on the monthly test there is one start from the local con-trols and one. start from the remote controls, the number of starts -

fper cist.is two.- If two or more diesels are started simultaneously 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 example._

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Number of Starts: ' Enter the' sum of the successful and' unsuccessful start attempts 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 column one.

Number ~of railures: -Enter the sum of the failures for each category. A

- I

. failure is counted if the objectives of the test are not achieved. A subsystem 'f ailure that does not cause failure of _ the diesel generator system 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, Rif the diesel generator would have supplied power in some capacity for ~an emergency, please explain in Table 3.

For example,-if the diesel started on the second attempt or the diesel was' tripped to repair a minor oil leak that would not have been a problem in an emergency, this should be neced in Table 3..

Percent Leading of DG CKW): Enter the percentage that the diesel is

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loaded for each category. The continuous 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 questionnaira are abstracts of the LERs related to the diesel generators. The abstracts are numbered starting with'one. Refer to this number to identify the failures, but if there was a failure for whic. there is no abstract, assign the failure a number and-include 'it in Table 3.

Table 2 Reason for Downtime: Enter in this column the categories of schedule nain-tenance that sake the diesel generator unavailable for emergency service.

If the' diesel generator is unavailable for emergency service during surveillance testing, report that also.

g.

s - Page 6.

2 i

l Table 2 (cont'd)

Hours of Downtime: Enter the number of hours that the diesel generator is unavailable for emergency service. Report the hours under the column reactor shutdown or reactor not shutdown as appropriate.

Comments:. Comment on time to return to service after maintenance has begun, or other pertinent information.

Table 3 LER Abstract No. (Refer to attached LER Abstracts): The attached LERs are numbered starting from one. Refer to this LER number in column 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 number and enter it in this table.

Downtime Hours: En.ter the number of hours that the diesel generator is unavailable for emergency service. Subdivide these total hours into troubleshooting, parts delivery, and repair or replacement.

Comments: Use this column to comment on the downtime and the failure.

If the reported failure was only a technical specification violation, but would not be a complete failure of the diesel generator to supply _ power.or would only'be a delay, please elaborate in this column.

Table !*

Equipment or procedura modiffed: List in this column the equipment or procedures related to the emergency onsite power system that have been modified since the reactor became critical.

Date of Mod.: Enter the date that the modification was completed.

Reason for Modification and Desired Improvement: Report the reason for the modification and the desired or observed improvement in the system.

l Description of Modification: '3riefly describe what modification was i

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Enclosure 1-- Pega.8 TABI.E 2 F1 ant Name (Sample)

Diesel lCeneratcr Scheduled Downtime Record Unit No.

. Calendar Year.19_

f Ilours of Downtime Reason for iteactor shutdoun Reactor.not shutdown Comments Ik>unt ime Dyr

]f DCf DCI yf gf DCf DCI DCf p

g Scheduled Nintenance j

i Preventive 24 16 16 Wintenance Semi-annual &

)

Annual 1

4 j

Equipment Hodification 8

8 4

Hodified lube oil on each diesel. Diesels down at different times.

1 4

1 i

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i I

Time DC is unovailable l

for emergency service Lecause of required testu l

Doun 4 hrs per test 8

48 40 48 Diesel cannot be automatically started

{

during test or for three hours afterwards i

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,r F.nclosure'I - Page 9 TAnl.F. 3 Dicael Cenerator Unscheduled Downtime Record-Plant Name XI.I

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Calendar Year 19__

Uni't No, 16 2 $.,

N.

t Commatets - It cny of the reported failures would noc have been a I.ER Abstract N.

Downtime llours failure under emergency: conditions, please esplain here.

I IN"I*# I " " ' " 'I frouble-l'a r t s. Del - Repat r/

Refer to attached LERs or the failures listed lu Table 1..

ed LER ALstrace a) Total lleurs sliooting tvery.etc teplace 1

4 1

1 2

2 3

0.5 1

1.5 5

3 12 1

10 1

4 0

0 0

0 Diesel started in 15 wec instead of required 10 sec l

5 0

0 0

0

- Secondary air presstare low.

Primary air satis f actory.

1 6

0 0

0 0

Secondary air pressure low.

Primary air satisfactory.

7 0

0 0

0 Diesel starte1 in 20 sec instead of required 10 sec.

j 8

0 0

0 0

False DC start signal. DC satisfactqry No 1.ER 9

0 0

0 0

Required DC starts after tlie failure of one diesel.

10 0

0 0

0 Starts to verify repairs.

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" - Page 10

~~

Tant.E 4 Onsite Emergency Diesel Generator and Plant Name (Sample)

Auxiliary Equipment Hudification Record Unit No.-

' 'Esiu t poent or Date of

. Reason for Hodification and procedure Hod.

Desired Improvement' Description of hdification anodifled t

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

continuo =?-lube oil pump.

New pump also continuously lubricates the crankshaft.

]

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

contacts.

Instrument 6/79 Eliminate vibration damage to Cbatrol and monitoring instrument panel was relocated from the' engine skids to a free Relocation instruments i

standing panel mounted on e h engine room floor.

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1 PAGE 403 ACCESS 13N NO.-

OCZC159*24-

. T ! I LE~

J1ESCL.GiNEHATO4 DAY TANK DRAINS AT NINE MILE PUINT 1 CORP AU Tn NIAGARA 90 HAWK P O wE k COkPORATION D A T81 1 %2 O TYPh O

MEMU L TR #/LER 30-016 TO U.S.

NRC. REGION 1.

SEP 8,

1960, COCKET 60-220. T YPE -Ow R,

.v F G --GE. A E --N M AVAIL AVAILAclLITY - NRC PUbLIC DOCUMENT ROOM, 1717 H S TREE T, WASHINGTON, D.

C.

20555 (08 CENTb/PAGE -- MINIMUM CHARGE L2.001 095%-

CAUSE - ORAIN AGS TR AC T -

DATE OF EVENT - 060660.

POWER LEVEL VALVE IRANSFtRS OPEN.

DUR ING NORM AL OPER AT ION EM ER G ENCY DIESEL btNERATOR #103 FUCL OIL OAY TANK LOW LEVEL ALARM #AS RECE!VED.

THE 0AY TANK H AD JRAINtO TO THE OUTSIDE FUEL STORAGE TANK.

RENDEh!NG T HE O! E SE L INOPER40LE.

THE CAUSE WAS AN INADVER TENT O PE N I NG OF fnE DAY TANK DRAIN VALVE.

1. 103 DAY T%NK WAS REFILLED WITH FUEL Q1L, AND duuSEQUENTLY PROVE *

,PERAdLC BY THE APPf40PR I AT E dv RV E IL L AN C E TtST.

COM PO NE.s i CODE VALVEx-VALVES JYSTCM COOE EE-EMERG GENC4ATO3 SYS G Cl ?N T ROLS C6/5/0000001-COOO3ub//

2 ACCEbb10N tO.

Oc20152931 TITLE

-DICbEL bcNCh AT CH COULING WATER PUNP MREAKER FAILS AT NINE MILE P JINT 1 CORPAufh r t AGARA MCHA*4 POWER CURPORATION DATE

'4 79.

TYPE O

MEMO L1R w/LER 79-023 TO U.S.

NRC, reb 1GN

1. NOV O2. 1979. DOCKET 50-220. T Y P t --8 4 R.

PFG--GE, AE--O CONTROL--027313 AVAIL AVAILAGILITY - NRC PLSLIC DOCUMEN T ROOM. 1717 H STREET.

1. ASHINGTON 3.C. 20555 (08 /PAGE -- MINIMUM CHARGE $7.00) 100*?9. PO*EH LEVEL - 095%. CAUSE - CONTACTS ABE lil AC T.

D AT E OF_ EVENT SLRNEO AND - S lV CK OPEN.

DUR ING STtADY STATE OPCRATION, WHILE PC9eORMihG AN OPERAb!LITY TEST CN *103 DIEbEL GENER AT CR. THE ASSOCIAIED CO3 LING WATER PUMP TR i v Ph D OUE TO GREAKER M ALFUNC T IGN.

oCFLRE lHE CCOLING mAlcR PUVP RESTARTED, THE G EN CR A T U R COCLING WATER INLET TCMPERATURE INCRCASED TO 210F.

Tnd 01ES-L5

• E nE INSPECTED FGR POSbluLE HEAT DAMAGE SUT NONE WAS FO'sNo.

TH ER E 4A5' REDUNDANCY AVAILADLE.

THE CONTACT 5 IN Tnt HiEASER bcRE FOUND TO BE BURNEC AND AN AUXILIARY CONTACT WAS F( UNL S i vC N IM THE OPEN PCb1 TION.

THE 9REAKER WAS PEPAIRED A ND THE PUMP WAb MANUALLY STARTED TO TEST CPERADILITY.

THE COO L I NG wAicR PUNP 6AEAKER PREVCNTAIIVE MA]NTCNANCE PROCEDURE alLL bt REV 15ED.

-CGNPONENT CODE' CNTURN-LIRCULT CLCSERS/ I NT ERRUP TE R S SYSTEM CODE iE-EMERu GENcWATOR SYS & CONTROLS 43/5/0G00001-000000$//

3 ACCESLICN NC.

00Z014o637 TITLc UIESEL GdNER AT OR DREAKER FAILS TO CLOSE AT NINE MILE POINT 1 CGHFAUTH NIAGARn MCHAwK POWER CORPOhATION DALE 1979 TYPE O

MEMO LTR w/LER T 9 -O v4 TJ L.S.

NRC. REClON 1.

APR 19. 1979, DOCKET bO-E20. l Y P c --o

• R.

VFG--GC.

At--O CONTROL--025b50 AVAIL AVAILAb!LITY - NRC PUOLIC OOCUMtNT ROOM. 1717 H SIREET.

1. ASHINGTON D.C. 2055S. (06 /PAuE -- M I N I MUM CHARGE 12.00)

AESTR AC T OATC OF EVENT - O*0279. POWER LEVEL - 000%. CAUSE - NOl DETERMINEO.

O UR I NG THE REFUEL OUTAGE, WHILE IN COLD SHUTOOwN A ND ALL FUEL OFF LOADED 10 THE FUEL POOL, SREAKER 1022 FAILEO TO CLOSE aMILE PERFCRMING 5URVEILLANCE IEST N 1 -S T -M e.

lHIS

-PREVENTec D!ESEL/LENERATGR 102 TO GO ON LINE. INITIALLY RAN RtDUNUANT DIESEL /GENERATCR 103.

TM1b CONDITION RESULTED IN MINIMAL S AF E TY I NPL IC A TI ONS.

THE CAUSE OF FAILURE TO CLOSE IS JNKNOwN. HGaEVER. ALL SUBSEOUCNT TESTb PERFORMED aERC SLCCESSFLL.

SL4VEILLANCE TEbTING *1LL SF INCRE ASED UNTIL S AT ISF AC TLR Y RELIAalLITY-15 ASSLRED.

CC#PONENT COLc C N T o4 K -C IR CU IT CLOSERS / INTERRUPTERS

-SYdTEM CCDt Ei-tMtRb GENER AT OR SYb G CONTRCLS Cs / 5 /C O O G O C l -C O O OC OS / /

4 ACOi5510N NO.

ObZbl42090 TITLE DG FUEL TRANSFER PUNP FalLb TO FILL DAY TANK AT NINC MILE POINT i

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4 CON T IN U A T I GN 1

PAGE AC4 1-

~-COkPAU1H-N!AGARA: MOHA*4-PGnEH-COHP., SYR ACUSE, NY DATE 1976 cTYPE O

. ME.40 2 PGS. LTs-w/LER 76 -14 TO U.S.

NHC. REGION 1.

MARCH 26.

1978.

OUCKET E c-2 P G.

T Y PE --d w R. MFC--GC, AE --N I A G A R A MOHAWK AVAIL AVA ILAL lL A T Y - NR C PUeLIC DOCUMENT ROOM. 1717 H STRECT,

1. ASHINGTON.

L.

C.

20$db- (06 CENTS /PAGE -- FINIMUM CHARGE 12.00)

Afid14 ALT.

DATE Or EVENT - 030778.

POWER LcVEL - 99 %.

CAUSE - PUMP LOST PRIME CUE TO CRALR WHILC SAMPLING.

UURING STEADY STATE OPER A l l OtJ, PERFORMANCL OF A btRVEILLANCE TEST FOUND THAT THE FUEL IRANSFEm PUMP CN 102 D/G WOULD NOT FILL THE DAY TANK.

THE 4UE L 1RANSFEh PU FP LOST IT S PRIME WHEN THE A.Y.

MCDONALD FOOT VALVE A SLCMO LY WAS MISTAAENLY UNSEATCD OURING AN ATTEMPT TO d AkiPLE -TML F UE L O !L.

THE FOOT VALVE WAS REMOvtD. INSPECTED, AND REPLACEG.

TRANSFCR PUMP FUNCllONED PROPEWLY.

SAMPLING P4GLEDURE IS 3EING REVISto TO MORE READILY IDENTIFY THE PROPER SaMPL& POIN1.

COMPONEN1. CODE

.V AL VE X -V ALV E S SY S T E.%. tOCE

.EE-CMEAG vtNCRATLH LY S & CGNTROLS

- ed/5 / O CC00 01 -OO G GC OS//

5 ACCEbSION NO.

0c10137237 TITLi 01ESEL GENERATOR FUEL -T R ANSF ER PUMP FAILS TO FILL THE DAY TANK AT NINE MILE POINT I CURPAulM' NIAGANA v.OH A a4 PO4Eh CORP., SYRACUSE. NY OATE-1976

-1YPE-O MEMO' 2 PGS. LTR w/LER 78 -14 TO U.S.

NkC. REGION 1.

APRll 7.

1976.

DOCKCT 50-2 2 v, T Y P E --h w R. M F G--GE. AE --N I A L A R A MOHAWK AVAIL AVAILAdlLilY - NhC PUOLIC DOCUMENT ROOM. 1717 H STREET.

WASHINGTON..L.

C.

20545 (08 CENTS /PAGE -- PINIMUM CHARGE 52.00)

' AhSTRACI-

~ D AT E OF cVENT

.C30773.

POWER LCVEL - 99%.

CAUSE - FOOT VALVE MISTAAEALY UNSEATED UbRING SAMPLING.

DURING A TEST. TPC FUEL IRANSFLR PUFP DN D/C 10E *CULO' NUT FlLL THC DAY TANA.

THE FUEL TRANSFER-PUFP LOST ITE Pk!ME WHEN THE A.Y.

MCDONALD FOOT VALVE AbbevDLY.WAb M IS T AK ENL Y - UNSEATCO D UR I Nb AN ATTE*P1 TO SAMPLE THE FULL CIL.

ThE rOCT VALVE WA5 REaOVED. INSPECTED, AND RrPLACLD.

ThANSFCR PUMP FUNCilCNED PRCPERLY.

SAMPLING Ph0CtOURE 15 SEING REVIStO TO MuhE HCAGILY IDENTIFY THE PRCPER SAMelt PCINT.

. CCHPOrdNT cob 6 V ALVdX -V ALV E S SYSTEM C Odd L hE-CMLH C GENER AT ON bY S & CONTROLS qq.

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