ML20028H388
| ML20028H388 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 12/10/1990 |
| From: | Chaffee A Office of Nuclear Reactor Regulation |
| To: | Rossi C Office of Nuclear Reactor Regulation |
| References | |
| OREM-90-029, OREM-90-29, NUDOCS 9101020259 | |
| Download: ML20028H388 (12) | |
Text
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De:et:+r 10. W PEMORANDUM FOR:
Charles E. Rossi, Diretter Division of Operttienel Ever,ts Assessrient FROM:
Alfred E. Chaffee, Chitf Ever,ts Assessnient Brench Division of Operctiorel Events Assessment EUBJECT:
THE OPERATINC REACTORS EVENTS MEETINC NOVEMBER 20, 1990 MEETING 90 29 On Noven.ber 28, 1990, we conducted an Opereting Reactors Events metting (90 29) to inform senior managers from NRR ACES Com.ission staff, end regional offices of selected events that occurred sInce ou,r lest t>riefing on November 7,1990. lists the attendees. presents tht E gnificent elements d
of the discussed events. contains retttor scram statistics for the weeks ending 11/2f /90 and 11/18/90.
No significent events were identified for input into the NRC performance indicator program.
OriEinal 54nt:! t'y Alfrtd E. Chaffee, Chief 9101020259 901210 Eventt Assessment Brench PDR ORO NRRD Division of Operational Events A*sessment PDR
Enclosures:
As stated cc w/ Encl.:
See Next Page DISTRIBUTION:
Central file EAB Reading file MLReardon, EAL LKilgore, SECY PDR Q YA n.1 0FC :EAB:DOEA
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NAME :MLReardon
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DATE :12/0 3/90
- 12/0)/90
- 12/Cd/90
- 12//C/90
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OfflCIAL RECORD COPY q\\ y O Decument Namt:
TRANSMITTAL LETTER 11/28/90
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o CC:
T. Murley, NRR L. Kolejko, NRP
- 0. Crutchfic16, NRR J. Zwolinski, NRR B. Boger, ilRR W. Travers, NRR J. Richardson, NRP A. Thedani, NRR
- f. Rosa NBR B. Grirns, NRR
- f. Congel, NRR J. Roe, hRR T. Mertin, RI W. Kane, R1 C. Mehl, R1 S. Ebneter, RII L. Reyes, Pll B. Devis, Rill E. Greenman, Rill R.D. Martin, RIV S. Collins, Ely J.B. Martin, RV R. Zimerman, RV P. Boehnert ACRS E. Jordan,IEOD
- 1. Novak, AEOD L. Spesserd. AEOD G. Zech, AE0D E. Weiss, AEOD S. Rubin, AE00 M. Harper, AEOD W. Batenan, EDO R. Newlin GPA J. Cowan,,INPO E. Beckjord, RES A. Bates, SECY
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=i ENCLOSURE 1 F
LIST OF ATTENDEES OPERAT! llc PEACTORS EVEliTS BRIEFII:G (90-29)
Novert er 28, 1990 NAliE ORGANIZATION NAME CRGAJ12 AT1014 J. Tatum flRR/PDS P. Bochnert ACRS A. Chaffee flRR/DOEA C. Rossi NRR/DOEA H. Etiley NRR/DOEA L. Kottjko NRR/DRSP M 51osson OEDO E, Greenman NRR/DRP A. Yeong NRR/DOEA D. Fischer I;tR/90EA W. Jensen NRR/DGEA M. Reardon tiRR/DOEA S. Kimel NRR/00EA C. McCracken NRR/SPCB R. Benedict NRR/00EA C. Thomas tiRR/DLPQ G. Hubbard NRR/SPLC R. Pedersen OE S. Koscielny NRR/EMCB K. Harb SECY T. Daniels tiRR/R$1B
________-_______________m___
EfiCLOSURE 2 OPERATING REACTORS EVENTS BRIEFING 90-29 EVENTS ASSESSMENT BRANCli LOCATION:
10B-11, WHITE FLINT WEDNESDAY, NOVEMBER 28, 1990, 11:00 A.M.
SAN ONOFRE UNIT 2 INADVERTEllT ACTUATION OF CONTAINMENT SPRAY
00-29 l'
SAN ON0FRE UNIT 2 4
q INADVERTENT CONTAINMENT SPPAY ACTUATION NOVEMBER 20, 1990 l
PROBLEM 5000 GALLONS OF BORATED WATER SPRAYED INTO CONTAINMENT, l
i CAUSE ENGINEERED SAFETY FEATURES ACTUATION SIGNAL (ESFAS) GENERATED BY PERSONNEL ERROR, 3
- SAFETY SIGNIFICANCE
- POTENTIAL F0P FLECTRICAL SHORTS AND CORROS10N OF EQUIPMENT INSIDE CONTAINMENT, DISCUSSION o
ROUTINE TESTING OF THE PLANT PROTECTION SYSTEM WHILE AT 100% POWER, o
ICC-TFCHNICIAN TESTED ONE CHANNEL-WITHOUT RESETTING PREVIOUS j
3
- CHANNEL, 1
2 0F 4 LOGIC ACTUATED FOR ENGINEERED SAFETY FEATURES ACTUATION, TECHNICIAN DID-NOT FOLLOW PROCEDURE, o
ED0s-STARTED BUT DID NOT LOAD, o
HIGH PRESSURE INJECTION PUMPS STARTED BUT DlD NOT INJECT, o
CONTAINMENT WAS-SPRAYED WITH BORATED WATER FOR APPROXIMATELY-ONE MINUTE, o
NO ALARMS OR ELECTRICAL FAULTS WERE IMMEDIATELY DETECTED, o
CONTAINMENT SPRAY WATER NO LONGER CONTAINS NA0H, o
LICENSEE CONTINUED OPERATION BASED ON MARCil-19P4 SPRAYDOWN AND INSPECTION, o
THREE-TEAMS lNSPECTED RADIOLOGICAL ACCESSIBLE AREAS INSIDE CONTAINMENT, AIT:
NO CONTACT:
W. JENSEN SIGEVENT:
NO
REFERENCES:
10 CFR 50,72 REPORT #19913 AND MORNING REPORT 11/21/90 e--
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SAN ONOFRE UNIT 2 90-29 DISCUSSION (CONTINUED)
-o LIGHTING, JUNCTION BOXES, PIP!NG, INSULATION, TRANSMITTERS, CABLE r. TRAYS, o
NO SIGNIFICANT DAMAGE DETECTED, o
SPRAY WATER COLLECTED IN EQUIPMENT SUMP AND AUTOMATICALLY PUt' PED OUT, o
NO LEVEL INCREASE IN EMERGENCY SUMP, o
ROUTINE SURVEILLANCE OF CONTROL R0D DRIVE PENETRATIONS 11/23/90, l
o PLANT SHUTDOWN WHEN ELECTRICAL FAULT FOUND, o
7 ADDITIONAL ELECTRICAL FAULTS FOUND IN CONNECTORS INSIDE CONTAINMENT, o
EFFECT OF WETTING PREEXISTING CORROSION, o
ONE CONNECTOR REQUIRED REPLACEMENT, o
NO SIGNIFICANT DAMAGE DETECTED WITHIN PREVIOUSLY INACCESSIBLE
- AREAS,
.o PLANT RESTARTED 11/28/90 FOLLOWING REPAlR TO CONTROL R0D DRIVE CONNECTORS, o
LICENSEE INVESTIGATING CAUSE OF CONNECTOR CORROSION, L
o -PREVIOUS SPRAY DOWN EVENTS.0CCURRED AT CALVERT CLIFFS, KEWAUNEE, PALISADES AND WATERFORD, FOLLOW-UP NRR TO EVALUATE CONSEQUENCES OF INADVERTENT CONTAINMENT SPRAY ACTUATION AND THE APPROPRIATENESS OF STAYING AT POWER FOLLOWING THESE EVENTS, E.G.,
DAMAGE OF SAFETY AND NON-SAFETY-RELATED ELECTRICAL EQUIPMENT, HAZARD TO PLANT PERSONNEL FROM RADIATION AND PLANT ACCIDENTS, POTENTIAL. MASKING OF ABILITY TO DETECT SMALL LEAKS, POTENTIAL CHALLENGES TO PLANT SYSTEMS FROM SHUTDOWN, L
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i C ON TR OL R00 DRIVS ELECTRICAL C ON jy EL TIO/V SA N ONOFAG VNIT 2
ENCLOSURE 3 FIAT 10R $ TRAM $UMMARY WilRthDlh611/26/90
- 1. PLANT 5 Fit!FIC DATA DAtt
$ lit Unli POWER $16hAL CAUSE C0hPL1-VfD Yib Tit (A110h5 AP0vi FILOW TOTAL 151 151 11/21/90 FRA!Rit ISLAND 1
100A (0J1FMENT WO 1
0 1
!!/23/90 SEQUOTAH 2
30A 10VlFM[h1 NO 2
0 2
11/24/90 CALL 0 HAY l
49 A
[0V!FMINT N0 1
0 1
!!/24/90GRAkDSULF i
1M E0VlPMINT k0 2
1 3
11/24/90$0VIHTEIAS 1
100 A E0J1FRENT WO 7
1 8
R[AtiCR SCRAM $UMARY WElk END!N6 11/10/90
- 1. PLANT $P[ClF!CDATA DATE Slit UNii POWER $16NAL CAUSE COMPL1-YTD Yip tid CA110NS AliDVI SILOW TOTAL 151 151 11/13/90Ot0NIE 3 100 M (GUIPMENT NO 3
0 3
11/17/90M;6UlRf 1 100 A
[0VIPMENT k0 3
0 3
!!/17/90 HDF[ CREEK 1 100 A (GUIPMENT N0 4
0 4
!!/17/90 WINE MILE POINT 1
97 A P[R$0NNEL N0 3
0 3
11/18/90 SUSQUCHANNA 1
21 M
[0V!PMENT WO 1
0 1
II. COMF ARISON OF WEELLY STATISTICS WITH INDUSTRY AVERoGES SCRAMS FOR WEEK ENDING 11/25/90 SCRAM CAUSE POWER NUMBER 1990 1989 1980 1987 198e OF WEEtLV WEEPLY WEELLY WEEPLY WEEtLY SCRAMS (5)
AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE YTD
(!)(4)
- POWER >-15%
EOUIP. RELATED
>15%
4 3.7 2.9 0.1
- 7. 9 4.0 PERS. RELATED(6) >15%
0 0.6 1.0 1.0 1.3 1.0 OTHER(7)
>15%
0 0.0 0.1 0.T 1.0 0.4
- Subtotal **
4 7.9 4.0 4.6 6.4 6.5
- POWER <15%
EQUIP. RELATED
<15%
1 0.4 0.4 0.5 1.2 1.4 PERS. RELATED
<15%
0 0.1 0.3 0.3 0.6 0.0 OTHER
<15%
0 0.0 0.7 0.1 0.0 0.2
- Subtotal **
1 0.5 1.4 0.9 0.1 2.4
- Total ***
5 4.4 5.4 5.5 0.5 S.9 MANUAL VS AUTO SCRAMS TYPE NUME4ER 1990 1989 1989 1407 1986 OF WEEULY WEEKLY WEEKLY WEELL Y WEEPLY SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AV'ERAGE YTD MANUAL SCRAMS 1
1.2 0.9 1.0 1.4 1.0 AUTOMATIC SCRAMS 4
3.2 3.8 4.5 7.0 7.9
1 s
- 11. COMPARISON OF WEE)LY STATISTICS WITH INDUSTRY AVERAGES SCRAMS FOR WEEL ENDING 11/18/90 SCRAM CAUSE FOWER NUME4ER 1990 1989 1980 1987 198o OF WEELLY WEELLY WEEFLY WEEFLY WEElLY SCRAMS (5)
AVERAGE AVERAGE AVERAGE AVERADE AVERAGE YTD (3)(4)
- POWER >15%
EOUIP. RELATED
>15%
4 3.3 2.9 3.1 3.9 4.3 PERS. RELATED(6) >15%
1 0.6 1.0 1.0 1.3 1.8 OTHER(7)
>15%
0 0.0 0.1 0.5 1.2 0.4
- Subtotal **
5 3,9 4.0 4.6 6.4 6.5
- POWER <15%
EDUIP. RELATED
<15%
0 0.4 0.4 0.5 1.2 1.4 PERS. RELATED
<15%
0 0.1 0.3 0.!
O.6 0.8 OTHER
<15%
0 0.0 0.7 d. 'l O.3 0.0
- Subtotal **
O O.5 1.4 0.9 2.1 2.4
- Total 5
4.4 5.4 5.5 B.5 8.9 s
MANUAL VS AUTO SCRAMS TYPE NUMBER 1990 1989 1988 1987 1986 OF WEELLY WEELLY WEELLY WEEULY WEELLY SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE YTD MANUAL SCRAMS 2
1.0 0.9 1.0 1.4 1.0 AUTOMATIC SCRAMS 3
3.2 3.8 4.5 7.0 7.9
O HOTES 1.
PLANT SPECIFIC DATA CASED ON INITIAL REVIEW OF E0.72 REPORTS FOR THE VEEK OF INTEREST.
PERIOD IS MIDNIGHT SUNDAY THROUGH MIDNIGHT SUNDAY.
SCP.tFS ARE DEFINED AS REACTOR PROTECTIVE ACTL'ATICfl5 WHICH RESULT IN RCD MOTION, AllD EXCLUDE PLAllNED TESTS CL SCRAMS AS PAPT OF PLAN!!ED SHUTDOW!i It ACCORDANCE WITH A PLAllT PROCEDURE. THERE ARE 111 REACTORS HOLDING AN OPERATlHC LICENSE.
2.
COMPLICATIONS: RECOVERY COMPLICATED BY EQUIPMENT FAILURES OR PER5014tiEL ERROPS UNRELATED TO CAUSE OF SCRAM.
3.
PERS0HNEL RELATED PPOBLEMS lilCLUDE HUllAfl EPROR, PROCEDURAL DEFICIENCIES, AND MANUAL STEAM GENERATOR LEVEL CONTROL PROBLEMS.
4.
"0THER" 1NCLUDES AUTOMATIC SCRAMS ATTRIBUTED TO ENVIRONMEllTAL CAUSES (LIGHTHINC), SYSTEM DESIGN, OR UNKNOWN CAUSE.
OEAD SCRAM DATA Manual and Automatic Scrams for 1986 ------------------ 461 Manuel and Automatic Scramt for 1987 ------------------ 439 Manual and Automatic Scrams for 1988 ------------------ 287 Manual and Automatic Scrams for 1989 ------------------ 244 Manual and Automatic Scrars f or 1990 (YTD 11/25/90)---- 201
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