ML20129J478

Summarizes 961030 Operating Reactors Events Briefing 96-14 Re Notification of Senior Managers from Commission,Oe,Aeod, Res,Nrr & Regional Offices of Selected Events That Occurred Since 961023 Briefing.List of Attendees Encl

ML20129J478
Person / Time
Site:	Nine Mile Point, LaSalle
Issue date:	11/04/1996
From:	Chaffee A NRC (Affiliation Not Assigned)
To:	Martin T NRC (Affiliation Not Assigned)
References
OREM-96-014, OREM-96-14, NUDOCS 9611060288
Download: ML20129J478 (11)

Text

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hvmber 4,1996

/

MEMORANDUM TO: Thomas T. Martin. Director l Division of Reactor Program Management i

FROM: Alfred E. Chaffee. Chief [ original sigrxx1 by]

Events Assessment and Generic Communications Branch Division of Reactor Program Management

SUBJECT:

OPERATING REACTORS EVENTS BRIEFING  :

OCTOBER 30, 1996 - BRIEFING 96-14 '

On October 30, 1996, we conducted an Operating Reactors Events Briefing (96-14) to inform senior managers from offices of the Commission. OE. AE00

.RES. NRR and regional offices of selected events that occurred since our last briefing on October 23. 1996. Attachment 1 lists the attendees. Attachment 2 presents the significant elements of the discussed events.

' Attachment 3 contains reactor scram statistics for the week ending October 27, 1996. One significant event was identified for input into the NRC Performance '

Indicator Program (Attachment 4).

The statements contained in the attached briefing slides represent the best information currently available to the NRC. Future followup could produce new I

-information that may alter the NRC's current view of the events discussed. I Attachments: As stated (4) cc w/atts:

See next page CONTACT: Kathy Gray. NRR (301) 415-1166 O

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DISTRIBUTION: (w/atts) l

-Central Files  ;

PUBLIC LKilgore. SECY ,

PECB R/F g  ;

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DOCUMENT NAME: G:\KAG\0RTRANS

f. To receive a copy of this document. Indicate in the boa: *C" = Copy without attachtnent/ enclosure "E" = Copy with attachment / enclosure *N* = No copy i M A.

l.

l OFFICE PECB ,_ lE #CB , lE @fy l C/PECB lN lNAME KGray:kag .Qqg /CWFter MQlennM AChaffee /)U g, p i lDATE 10/3 l /96' ' Q> 1)/ / 196 1(/ { 196 1)/ .( 196 / ,

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l 9611060288 961104 PDR ORO NRRA PDR g fh I

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CC:

F.-Miraglia. NRR (0-12G18) -

R. Lobel. NRR (0-8H7) l F. Gillespie. NRR (0-12G18)

R. Zimmerman. NRR (0-12G18)

A. Thadani. NRR (0-12G18)

B. Sheron NRR (0-12G18)

S. Varga. NRR (0-14E4)

J. Zwolinski, NRR (0-14H3)

J. Roe NRR (0-13E4)

E. Adensam. NRR (0-13E4)

G. Lainas. NRR (0-7D26)

G. Holahan. NRR (0-8E2)

M. Virgilio. NRR (0-8E2)

D. O'Neal. NRR (0-10E4)

B. Boger NRR (0-9E4)

M. Markley. ACRS (T-2E26)

E. Jordan. AE0D (T-4D18)

C. Rossi. AE00 (T-4A9)

F. Congel. AE00 (T-4D28)

R. Barrett AEOD (T-4A43)

S. Rubin. AE00 (T-4D28)

M. Harper. AE0D (T-4A9)

W. Leschek. AEOD (T-4A9)

V. McCree. EDO (0-17G21)

J. Gilliland. PA (0-2G4)

D. Morrison. RES (T-10F12)

W. Hill. SECY (0-16G15)

H. Miller, Region I R. Cooper. Region I S. Ebneter. Region II E. Merschoff Region II S. Vias. Region II A. Beach Region III J. Caldwell. Acting. Region III L. Callan. Region IV J. Dyer. Region IV K. Perkins, Region IV/WCFO G. Fader. INP0 J. Zimmer. DOE l

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l LIST OF ATTENDEES OPERATING REACTORS EVENTS FULL BRIEFING (96-14)

OCTOBER 30. 1996 i

l NAME OFFICE NAME OFFICE  :

A. Chaffee NRR L. Rossbach NRR K. Gray NRR W. Burton NRR R. Dennig NRR E. Adensam NRR J. Carter NRR J. Kauffman OE i R. Lobel NRR R. Lloyd AEOD l C. Berlinger NRR A. Serkiz RES T. Martin NRR M. Marshall RES S. Lee NRR J.D. Wilcox NRR .,

TELEPHONE ATTENDANCE l (AT ROLL CALL) l l

Reaions Resident Insoectors 1 Region I B. Norris. SRI Nine Mile Point i Region II I Region III l l Region IV Misc.

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ATTACHMENT 1 l

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l l OPERATING REACTORS EVENTS BRIEFING 96-14 l

LOCATION: 0-10B11, WHITE FLINT WEDNESDAY, OCTOBER 30, 1996 11:00 A.M.

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HULTIPLE SUPPRESSION POOL DEBRIS l

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PRESENTED BY:

EVENTS ASSESSMENT AND GENERIC COMMUNICATIONS BRANCH DIVISION OF REACTOR PROGRAM MANAGEMENT, NRR Attach rnt 1 f

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l 96-14

! SUPPRESSION P00L DEBRIS l OCTOBER 29, 1996 i

. PROBLEM j DEBRIS, CONSISTING OF SLUDGE AND MISCELLANE0US FOREIGN

! MATERIAL INCLUDING PLASTIC AND RUBBER SHEET MATERIALS

FOUND IN SUPPRESSION P00L AND DOWNCOMERS.

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< CAUSE

A THOROUGH CLEANING OF THE SUPPRESSION P00L AND l INTERFACING EQUIPMENT HAD NOT YET BEEN MADE.

SAFETY-SIGNIFICANCE THE FOREIGN MATERIAL WAS OF A TYPE AND QUANTITY THAT OPERATION OF RECIRCULATION PUMPS TAKING SUCTION FROM THE SUPPRESSION P0OL COULD BE ADVERSELY IMPACTED.

DISCUSSION e DURING THE PAST APPR0XIMATELY 10 YEARS, DEBRIS OF AN UNANTICIPATED NATURE AND QUANTITY HAS BEEN FOUND IN A NUMBER OF LOCATIONS NOT PREVIOUSLY EXPLICITLY CONSIDERED IN SAFETY EVALUATIONS.

e A NUMBER OF GENERIC COMMUNICATIONS HAVE BEEN ISSUED:

SOME PROVIDED EXAMPLES UNIQUE TO EITHER BWRs OR PWRs A FEW WERE DIRECTED TO EITHER PWRS OR BWRs FOUR BULLETINS, INCLUDING SUPPLEMENTS, AND ONE GENERIC LETTER HAVE BEEN ISSUED CONTACT: J. CARTER, NRR/DRPM/PECB AIT: NO

REFERENCES:

10 CFR 50.72 #31172, #31159; SIGEVENT: N0 ,

MR 1-96-0093 l

96-14 e BULLETIN 95-02 ISSUED OCTOBER 17, 1995, REQUESTED BWR LICENSEES T0:

VERIFY OPERABILITY OF ALL PUMPS SCHEDULE A CLEANING 0F THE SUPPRESSION P00L REVIEW FOREIGN MATERIAL EXCLUSION PROCEDURES AND CORRECT WEAKNESSES REPORT EXTENT OF COMPLIANCE WITH AB0VE REQUESTED ACTIONS e STAFF WAS SURPRISED TO LEARN THAT SOME LICENSEE STATEMENTS OF " CLEANING" MEANT ONLY SPOT CLEANING.

e ON OCTOBER 16, LASALLE, UNIT 2, REPORTED FINDING SUFFICIENT FOREIGN MATERIAL BURIED UNDER SLUDGE THAT OPERABILITY OF EMERGENCY CORE COOLING SYSTEMS WAS CHALLENGED:

LASALLE HAD PREVIOUSLY ONLY " SPOT CLEANED" THE P0OL DEBRIS WAS FOUND FLOATING ON WATER INSIDE SOME DOWNCOMERS e ON OCTOBER 17, DURING A RE-INSPECTION OF THE SUPPRESSION POOL AREA, NINE MILE POINT, UNIT 2, REPORTED FINDING CLEANLINESS C0 VERS ON SEVEN DOWNCOMERS AND DEBRIS FLOATING ON THE WATER IN OTHER DOWNCOMERS:

LICENSEE HAD PREVIOUSLY THOROUGHLY CLEANED THE SUPPRESSION POOL e FOREIGN MATERIALS BELIEVED TO HAVE BEEN PRESENT SINCE INITIAL OPERATION.

e SOME AREAS ARE INACCESSIBLE AND DIFFICULT TO INSPECT AND CLEAN.

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96-14 FOLLOWUP o AN INFORMATION NOTICE IS BEING PREPARED TO ALERT LICENSEES TO THE SIGNIFICANCE OF CHECKING DOWNCOMERS FOR CLEANL1 NESS.

e CONSIDERATIONS FOR ISSUING GENERIC COMMUNICATION: l 1

CLEANING ACTIVITIES AT LASALLE AND NINE MILE POINT, UNIT 2, WERE A CONSEQUENCE OF THE ACTIONS REQUESTED IN BULLETIN 95-02:

LASALLE WAS PERFORMING INITIAL THOROUGH CLEANING NINE MILE POINT, UNIT 2, WAS PERFORMING ENHANCED SURVEILLANCE 1

LICENSEES ESTABLISHED THEIR SCHEDULE FOR CLEANING l THE SUPPRESSION P0OL: l NOT ALL LICENSEES ARE KNOWN TO HAVE THOROUGHLY CLEANED THE P0OL SOME MAY HAVE ONLY REMOVED VISIBLE DEBRIS '

EXTENT OF CLEANING OF INTERFACING SYSTEMS / COMP 0NENTS VARIES GENERIC COMMUNICATIONS DID NOT EITHER DELINEATE SPECIFIC ACTIONS OR A SPECIFIC DATE FOR COMPLETION l OF LICENSEE CHOSEN ACTIONS:

LICENSEES MAY HAVE READ INFORMATION NOTICES  !

NARROWLY AND LITERALLY THE SIGNIFICANCE OF THE GENERIC CONCERN l EXPRESSED IN BULLETINS AND A GENERIC LETTER MAY NOT HAVE BEEN APPRECIATED OR THE RAMIFICATIONS OF VARIOUS ASPECTS UNDERST0OD NOT LIKELY TO IMPACT LICENSEE'S SELECTION OF LARGER STRAINERS TO RESOLVE BULLETIN 96-03, VERSUS BACKFLUSH CAPABILITY OR SELF CLEANING STRAINERS. l

. . . - . . . _ - ~ . . - . - .,.~.~~.-. . - - - . . - , . . . . . . - - - . . -

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REACTOR SCRAM Reporting Period: 10/21/% to 10/27/%

YTD YTD ABOVE BELOW YTD j QL1 PLANT & WIT ggg3 g CAUSE COMPLICATIONS 13 13 191& j 10/23/% V0GTLE 2 64 SA Equipment Feiture NO 2 0 2 10/24/ M NORTH ANNA 1 100 SA Equipment Felture NO 2 0 2 10/25/% OYSTER CREEK 1 100 SM Equipment Failure NO 2 1 3 1

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I Attachment 3 Mits: Year To Date (YTD) Totals include Events Within The Calender Year Indicated By The End Date of The Specified Reporting Period ETS-10 Page:1 10/31/ %

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I COMPARISON OF WEEKLY SCRAM STAftSTICS WITN INDUSTRY AVERAGES I

PERIOD ENDING 10/27/ %

I NUMBER 1996 1995 1994 1993 1992 0F WEEKLY WEEKLY WEEKLY WEEKLY WEEKLY SCRAM CAUSE SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE l

l (YTD)

POWER GREATER TNAN OR EQUAL TO 15%

EQUIPMENT FAILURE 3 1.60 1.83 1.52 1.83 2.62 DESIGN / INSTALLATION ERROR 0 0.12 0.12 0.08 0.04 -

OPERATING ERROR 0 0.07 0.15 0.21 0.27 0.31 1

MAINTENANCE ERROR 0 0.53 0.38 0.54 0.52 0.50 l EXTERNAL 0 0.16 0.21 0.17 0.13 -

OTNER 0 0.09 0.06 - 0.02 -

Subtotal 3 2.57 2.75 2.52 2.81 3.43 POWER LESS TNAN 151 l 1

EQUIPMENT FAILURE 0 0.21 0.10 0.27 0.38 0.42 DESIGN / INSTALLATION ERROR 0 0.00 -

0.02 - - l

! OPERATING ERROR 0 0.09 0.13 0.08 0.13 0.15 MAINTENANCE ERROR 0 0.07 0.08 - 0.02 0.08 EXTERNAL 0 0.00 - -

0.04 -

OTNER 0 0.00 - - - -

l 54 total 0 0.37 0.31 0.37 0.57 0.65 l

l TOTAL 3 2.94 3.06 2.89 3.38 4.08 l

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i 1996 1995 1994 1993 1992

NO. OF WEEKLY WEEKLY WEEKLY WEEKLY WEEKLY I SCRAM TYPE SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE f

(YTD)

TOTAL AUTOMATIC SCRAMS 2 1.84 1.92 2.19 2.44 3.'06 TOTAL MANUAL SCRAMS 1 1.12 1.13 0.69 0.94 1.02 TOTALS MAY DIFFER BECAUSE OF ROUNDING OFF 3

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NOTES

1. PLANT SPECIFIC DATA BASED ON INITIAL REVIEW OF 50.72 REPORTS FOR THE

( WEEK OF INTEREST. PERIOD IS MIDNIGHT SUNDAY THROUGH MIDNIGHT SUNDAY.

l SCRAMS ARE DEFINED AS REACTOR PROTECTIVE ACTUATIONS WHICH RESULT IN ROD

, MOTION, AND EXCLUDE PLANNED TESTS OR SCRAMS AS PART OF PLANNED SHUTDOWN l IN ACCORDANCE WITH A PLANT PROCEDURE. THERE ARE 111 REACTORS HOLDING AN l OPERATING LICENSE.

2. PERSONNEL RELATED PROBLEMS INCLUDE HUMAN ERROR, PROCEDURAL DEFICIENCIES, AND MANUAL STEAM GENERATOR LEVEL CONTROL PROBLEMS.

3. COMPLICATIONS: RECOVERY COMPLICATED BY EQUIPMENT FAILURES OR PERSONNEL l

ERRORS UNRELATED TO CAUSE OF SCRAM.

4. "OTHER" INCLUDES AUTOMATIC SCRAMS ATTRIBUTED TO ENVIRONMENTAL CAUSES (LIGHTNING), SYSTEM DESIGN, OR UNKNOWN CAUSE.

OEAB SCRAM DATA Manual and Automatic Scrams for 1987 ------------------ 435 M:nual and Automatic Scrams for 1988 ------------------ 291 l Manual and Automatic Scrams for 1989 ------------------ 252 l Mnnual and Automatic Scrams for 1990 ------------------ 226

(

Mnnual and Automatic Scrams for 1991 ------------------ 206 Manual and Automatic Scrams for 1992 ------------------ 212 Manual and Automatic Scrams for 1993 ------------------ 175 l Manual and Automatic Scrams for 1994 ------------------ 150 Mnnual and Automatic Scrams for 1995 ------------------ 159 l Mnnual and Automatic Scrams for 1996 --(YTD 10/27/96)-- 127 l

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OPERATING REACTOR PLANTS SIGNIFICANT EVE".TS No Sort Specified ouERY> Event Type SIG & Event Date >= 09/24/ % & Event Date <= 09/24/96 & "0CONEE" S Plant Name DATE OF 50.72 OR CLOSEQUT PLANT & UNIT g 33g(( DESCRIPTION OF EVENT SIGNIFICANCE 3RIEFING PRESENTER RECORD OCONEE 2 09/24/% 31053 Water hammer caused steem line rteture and other - Water Nammer 96-12 KOSHY T. HIGHLIGHT significant injury to plant staff.

ATTACHMENT 4 ETS-11 Page:1 10/31/ %

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