ML20057A406
| ML20057A406 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 07/20/1993 |
| From: | Chaffee A Office of Nuclear Reactor Regulation |
| To: | Grimes B Office of Nuclear Reactor Regulation |
| References | |
| OREM-93-026, OREM-93-26, NUDOCS 9309140157 | |
| Download: ML20057A406 (17) | |
Text
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MEMORANDUM FOR: Brian K. Grimes, Director Division of Operating Reactor Support FROM: Alfred E. Chaffee, Chi '
Events Assessme.t Branch Division of Operating Reactor Support
SUBJECT:
OPERATING REACTORS EVENTS BitIEFING l JULY 14, 1993 - BRIEFING 93-26 l On July 14, 1993, we conducted an Operating Reactors Events l Briefing (93-26) to inform senior managers from offices of the Chairman, NRR, ACRS, EDO, AEOD, and regional offices of selected events that occurred since our last briefing on July 7, 1993.
l Enclosure 1 lists the attendees. Enclosure 2 presents the significant elements of the discussed events.
Enclosure 3 contains reactor scram statistics for the week ending July 11, 1993. One significant event was identified for input into the NRC performance indicator program (Enclosure 4).
[ Original signed by]
Alfred E. Chaffee, Chief Events Assessment Branch !
Division of Operating Reactor Support
Enclosures:
As stated DISTRIBUTION:
- Central' Files
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DOCUMENT NAME: ORTRANS.KAG (G:KAG) {
930914O157 930720 PDR ORG NRRB i/
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T. Murley, NRR (12G18) A. Hsia (PDIII-1) i F. Miraglia, NRR (12G18) M. Gamberoni (PDIII-1)
F. Gillespie, NRR (12G18) T. Marsh (PDIII-1) i J. Partlow, NRR (12G18) '
S. Varga, NRR (14E4) i J. Calvo, NRR (14A4)
G. Lainas, NRR (14H3) ,
J. Roe, NRR (13E4)
J. Zwolinski, NRR (13H24) i E. Adensam, NRR (13E4) l W. Russell, NRR (12G18) i J. Richardson, NRR (7D26) l A. Thadani, NRR (BE2)
S. Rosenberg, NRR (10E4)
C. Rossi, NRR (9A2) . .
B. Boger, NRR (10H3) l F. Congel, NRR (10E2) f D. Crutchfield, NRR (11H21) ,
W. Travers, NRR (11B19)
[
D. Coe, ACRS (P-315)
E. Jordan, AEOD (MN-3701) l G. Holahan, AEOD (MN-9112) "
L. Spessard, AEOD (MN-3701) ;
K. Brockman, AEOD (MN-3206) '
S. Rubin, AEOD (MN-5219) !
M. Harper, AEOD (MN-9112) !
G. Grant, EDO (17G21) !
R. Newlin, GPA (2G5) '
A. Bates, SECY (16G15) ~
G. Rammling, OCM (16G15)
T. Martin, Region I l W. Kane, Region I i C. Hehl, Region I i S. Ebneter, Region II l
E. Merschoff, Region II i S. Vias, Region II !
J. Martin, Region III '
E. Greenman, Region III J. Milhoan, Region IV B. Beach, Region IV B. Faulkenberry, Region V K. Perkins, Region V i
bec: Mr. Sam Newton, Manager Events Analysis Department i Institute of Nuclear Power Operations 1 1
700 Galleria Parkway l Atlanta, GA 30339-5957 1
l :
l
.._ _ , 1
I ENCLOSURE 1 LIST OF ATTENDEES OPERATING REACTORS EVENTS FULL BRIEFING (93-26) !
JULY 14, 1993 NAME OFFICE NAME OFFICE i
l K. GRAY NRR M. VIRGILIO NRR i S. WITTENBERG NRR J. ROE NRR A. CHAFFEE NRR J. ZWOLINSKI NRR E. GOODWIN NRR J. PARTLOW NRR B. GRIMES NRR F. MIRAGLIA NRR l N. HUNEMULLER NRR S. VARGA NRR I S. LONG NRR J. CALVO NRR I F. GRUBELICH NRR D. COE ACRS l D. DESAULNIERS NRR K. SHEMBARGER OCM/IS :
M. GAMBERONI NRR T. MEADOWS RV !
D. CARTER NRR A. BURRITT RI ,
E. KENDRICK NRR D. WHEELER OEDO !
R. JONES NRR A. GODY, JR. OEDO i C. THOMAS NRR J. KAUFFMAN AEOD I 1
TELEPHONE ATTENDANCE (AT ROLL CALL) l l
Recions Resident Inspectors i Region II Region III Region IV Region V IIT/AIT Team Leaders Misc.
! W. Dean l A. Hsia l
l 1
l
0 0 ENCLOSURE 2 i
i l
1 OPERATING REACTORS EVENTS BRIEFING 93-26 l
LOCATION: 10 B11, WHITE FLINT l WEDNESDAY, JULY 14, 1993, 11:00 A.M. ]
PALISADES REFUELING OUTAGE PROBLEMS !
(STUCK CEA, BROKEN FUEL ROD, STUCK FUEL ASSEMBLY) [AIT]
PRESENTED BY: EVENTS ASSESSMENT BRANCH DIVISION OF OPERATING REACTOR SUPPORT, NRR
9 9 l 93-26 l PALISADES REFUELING OUTAGE PROBLEMS l JUNE-JULY 1993 ;
PROBLEM SEVERAL EVENTS (ATTACHED CONTROL ELEMENT ASSEMBLY [CEA], !
BROKEN FUEL ROD, AND STUCK FUEL ASSEMBLY [FA]) HAVE l OCCURRED DURING REFUELING OUTAGE. ;j CAUSE TO BE DETERMINED. l 1
SAFETY SIGNIFICANCE l PROGRAMMATIC BREAKDOWN. l BACKGROUND
- e ON TWO PREVIOUS OCCASIONS (SEPTEMBER 1988, AND FEBRUARY l I
! 1992) FAs IN CORE LOCATION Z-11 WERE FOUND STUCK TO BOTTOM 0F UPPER GUIDE STRUCTURE (UGS) . ROOT CAUSE ANALYSIS BY LICENSEE AFTER 1992 EVENT IDENTIFIED BENT i UPPER GUIDE STRUCTURE PINS BUT DID NOT IDENTIFY HOW j PINS WERE BENT. l DISCUSSION l o LICENSEE ENTERED A SCHEDULED 50 DAY REFUELING OUTAGE l APPR0XIMATELY JUNE 4, 1993. l l
i CONTACTS: W. DEAN, NRR/PDIII-1 AIT: YES~ !
J. RAMSEY, NRR/ DORS. SIGEVENT: TBD l
REFERENCES:
10 CFR 50.72 #25652, #25725,
- 25748, MORNING REPORTS-3-93-0184, 3-93-0200, l 3-93-0201, AND 3-93-0206
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- j PALISADES 93-26 l e ON JUNE 15, 1993, A CEA WAS LIFTED WHEN THE REACTOR VESSEL HEAD WAS REMOVED.
- LICENSEE COMPLETED REFUELING ON JUNE 27, 1993.
e ON JULY 1, 1993, LICENSEE IDENTIFIED A BROKEN FUEL PIN !
IN BOTTOM 0F REFUELING CAVITY TILT PIT WHILE LOWERING j WATER LEVEL. R0D IN THREE PIECES; FUEL PELLETS FROM l ONE PIECE MISSING. l l
e LICENSEE . TRACED FUEL PIN TO FA I-024 IN CORE LOCATION j B-19. THIS IS A FIVE CYCLE ASSEMBLY IN PERIPHERY OF !
CORE FOR VESSEL FLUENCE REDUCTION. j e ON JULY 6, 1993, FA SAN 8 IN CORE LOCATION Z-11 REMAINED ATTACHED TO BOTTOM OF UGS DURING REMOVAL l (PREPARATORY TO INSPECTION OF FA I-024). !
i e ON JULY 8, 1993, FA SAN 8 WAS FREED AND RETURNED TO ITS !
CORE LOCATION. l l
e ON JULY 8, 1993, REFUELING ACTIVITIES SUSPENDED UNTIL COMPLETION OF LICENSEE'S PROMPT ASSESSMENT OF EVENT-AND AIT'S REVIEW 0F LICENSEE'S PROMPT ASSESSMENT.
e ON JULY 12, 1993, LICENSEE RESUMED REFUELING ACTIVITIES (WITH AIT CONCURRENCE).
e ON JULY 13, 1993, LICENSEE RECOVERED FA I-024.
REMAINING FUEL R0D FRAGMENT. FELL'FROM FA AND IS l POSITIONED ON TOP 0F CORE. '
!~ O O !
i l PALISADES 93-26 e LICENSEE IS ASSESSING CONDITION OF FA I-024 AND: ROOT l CAUSE FOR FUEL R0D FAILURE, AND ASSESSING ROOT CAUSE OF j FA STICKING TO UGS.
l ,
e LICENSEE HAS NO IMMEDIATE PLANS TO PERFORM l ME7ALLURGICAL EXAM 0F FAILED FUEL ROD. ;
4 e LICENSEE CONDUCTED SURVEYS TO LOCKTE FUEL PELLETS; ,
RADIATION LEVELS IN POOL AND PURIFICATION SYSTEM ;
INCREASED SOMEWHAT, HOT SPOT IN REACTOR CAVITY. l FOLLOWUP l e REGION III SPECIAL INSPECTION TEAM DISPATCHED IN l RESPONSE TO ATTACHED CEA EVENT. l e AIT DISPATCHED IN RESPONSE TO BROKEN FUEL ROD AND STUCK i FA EVENT. j e REGION ISSUED CONFIRMATORY ACTION LETTER (CAL).
! e PRELIMINARY AIT WORK INDICATES DEFICIENCIES IN FUEL HANDLING PROCEDURES, WORK PRACTICES, AND OVERSIGHT.
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i ENCLOSURE 3 'i l !
i REACTOR SCRAM
! I poportig Period: 07/05/93 to 0P/11/93 )
YTD YTD l ADOWE BELOW YTD gatl Ptawi 8 Uwit g g g CtMPLICAfl0NS $ $ g
$7/05/93 SAli DNOFRE 3 100 5A Equipment Failure No 2 0- 2 i L
07/07/93 ZION 1 100 EA Equipment Feltura NO 1 0 ' 1-l 07/08/93 COOPER 1 0 SA Neintenance Error NO O 1 1 -
l C7/09/93 petty 1 100 SM Equipment Fallwe No 2 0 2 E7/10/93 DRESDEN 3 93 SA operettne Error No 3 0 3 07/11/93 SALEM 1 97 EA maintenance Error No 3 1 4 l 1
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ITS 10 Pope:1 07/19/93 ;
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9 r i
l COMPARISON OF HEEKLY SCPW $1 ATISTICS 6f!TH INDUSTRY AVERAGES I
PERICE) ENDING .
07/11/93 !
W i
l NUMBER 1993 1992 1991* 1990* j WECLY OF WEEKLY MEKLY. WEEKLY WEKLY AVERAGE i
SCRAM CAUSE $0 RAMS AVERAGE AVERAGE AVERAGE AVERAGE (YTD)
POWER GREATER TRAN OR EDUAL TO 15% .l f
E001PMEKT FAltuRE' 3 2.0 2.6 2.9 3.4 '3.1 DESIGN /INSTALLAT!fW ERROR
- O 0.1 - - -
h OPERATING ERROR
- 1 0.4 0.2 0.6 0.5 1.0 i MAINTENANCE ERROR
- 1 0.5 0.4 - ' - -
EXTEthAL* 0 0.1 - -
- CTNER* 0 0.0 0.2 - - 0.1 .l 5 4 total 5- 3.1 3.4 3.5 3.9 4.2 I
POJER LESS ThAN 15% f l
t EDUIPMENT FA! LURE
- 0 0.4 0.4 0.3 0.4 0.3 !
DESIGN /IWSTALLAfiON ERROR
- 0 0.0 - - -
OPERATING ERROR
- 0 0.2 0.1 0.2 0.1 0.3 l MAINTENANCE ERROR
- 1 0.0 0.1 - - -
EXTERNAL
- 0 0.0 - - - -
t OTHER* 0 0.0 0.1 - - - !
subtotal 1 0.6 0.7 0.5 0.5 0.6 '
TOTAL 6 3.7 4.1 4.0 4.4 4.8 1993 1992 1991 1990 1989 i NO. OF WEEKLY WEEKLY WEEKLY WEEKLY WEEKLY I SCFAM Y WE SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE .!
(YTD) l l
TOTAL AUTOMATIC 5: RAMS 5 2.6 3.1 3.3 3.2 3.9 4
)
TOTAL E NUAL SCRAMS 1 1.2 1.0 0.7 1.2 0.9 1 TOTALS MAY DIFFER BECAUSE OF kOUNDING OFF
- Detsited breakdown not in database for 1991 and earlier
- EXTERNAL cause included in EDU1PMENT FAILURE
- MAINTENANCE ERROR and DESIGN /IkSTALLAfl0N ERROR causes included in OPERATING ERROR
- OTHER case included in EDU1PMENT FAILURE 1991 and 1990 l
l.115-14 Paper 1 07/19/93 l'
ENCLOSURE 4 ,
OPERATING REACTOR PLANT.3 OIGNIFICANT EVENT 3 [' 'I No sort SPecified GUERD Event Type SIC & Event Date >= 07/02/89 & Event Date <= 07/02/67 & =G8AND GULF"
- Plant Name
. PLANT & UNIT k R DESCRIPit04 0F EVENT SIGNIFICANCE BRlblNG PRESENTER hE GRAND GULF 1 07/02/89 0 PARflAL PLUGGING OF SUCTION STRAINERS IN TME Safety Related Cooling System NONE CARTER J. INFORMAL /N!
SUPPRESSION POOL AT SWRs. TWO ENAMPLES OF TMIS LliE PROBLEM MAVE OCCURED AT GRAND GULF, ONE In 1988, AND THE OTNER IN 1989.
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