ML20199H390
| ML20199H390 | |
| Person / Time | |
|---|---|
| Issue date: | 02/02/1998 |
| From: | Richards S NRC (Affiliation Not Assigned) |
| To: | Roe J NRC (Affiliation Not Assigned) |
| References | |
| OREM-98-001, OREM-98-1, NUDOCS 9802050029 | |
| Download: ML20199H390 (9) | |
Text
February 2, 1998 j
MEMORA,NDUM TO: Jack W. Roe. Acting Director
/
Division of Reactor Program Management l Original signed byl FROM:
Stuart A. Richards. Chief Events Assessment. Generic Communications and Special Inspections Branch Division of Reactor Program Management
SUBJECT:
OPERATING REACTORS EVENTS BRIEFING JANUARY 28. 1998 - BRIEFING 98-01 On January 28, 1998, we conducted an Operating Reactors Events Briefing (98-01) to inform senior managers from offices of the Commission. AE00. NRR and regional offices of selected events that occurred since our last briefing on August 13. 1997. Attachment I lists the attendees. Attachment 2 presents the significant elements of the discussed event.
Two significant events were identified for input into the NRC Perforniance Indicator Program (Attachment 3).
The statements contained in the attached briefing slides represent the best information currently available to che NRC.
Future followup could produce new information that may alter the NRC's current view of the events discussed.
Attachments:
As stated (3) cc w/atts:
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See next page CONTACT: Kathy Gray. NRR (301) 415 1166 1()gfpf-}
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9 Central Files PUBLIC LKilgc.e. SECY py PECB R/F KGray EBenner X C_ ',,, p M h DOCUMt7 NAME: G:\\KAG\\0RTRANS
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S. Collins, NRR (0 12G18)
F. Miraglia, NRR (0-12G18)
P. Tam, NRR (011H20)
F, Gillespie, NRR (0-12G18)
H, Berkow NRR (014H20)
- R. Zinnerman, NRR (0-12G18) i B. Sheron, NRR (0-12G18)
B. Boger. NRR (0-14E4)
J. Zwolinski, NRR (0-14H3)
E. Adensam. NRR (0 13E4)
G. Lainas, NRR (0-7D26)
G. Holahan, NRR (0-8E2)
D. O'Neal NRR (0-10E4)
L. Spessard, NRR (0-9E4)
M. Markley, ACRS (T-2E26)
T. Martin, AE00 (T-4018)
C. Rossi, AE00 (T-4A9)
F. Congel. AEOD (T-4028)
R. Barrett, AEOD (T-4A43)
S. Rubin AE00 (T-4D28)
M. Harper, AEOD (T-4A9)
W. Leschek, AE00 (T-4A9)
G. Tracy. ED0 (0-16E15)
J. Gilliland. PA (0-2G4)
D. Morrison, RES (T-10F12)
W. Hill, SECY (0-16G15)
H. Miller, Region I C. Hehl, Region I L. Reyes, Region II J. Johnson. Region II S. Vias, Region II A. Beach, Region III G. Grant, Region III E. Mershoff. Region IV P. Gwynn. Region V K. Perkins, Region IV/WCF0 G. Fador. INP6 J. Zimmer DOE 4
I 3
LIST OF ATTENDEES OPERATING REACTORS EVENTS FULL BRIEFING (98-01)
JANUARY 28, 1998 NAME OFFICE NAME OFFICE E. Benner NRR S. Stewart DCM/SJ R. Dennig NRR T. Reis OE E. Goodwin NRR C. Rossi AE00 P. Tam NRR M. Tschiltz EDO H. Berkow NRR R. Eckenrode NRR B. Boger NRR K. Gray NRR TELEPHONE ATTENDANCE (AT ROLL CALL)
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Reaions Resident Insoectors Region I Region II Catawba. Senic'r Resident Inspector Region TII Region IV Misc ATTACHMENT 1
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98-01 i
L OPERATING REACTORS EVENTS BRIEFING 98-01 LOCATION:
0-10B]1, WHITE FLINT WEDNESDAY, JANUARY 28, 1998 11:00 A.M.
4 1
CATAWBA, UNIT 1 VALVE ALIGNMENT ISSUES t
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PRESENTED BY:
EVENTS ASSESSMENT, GENERIC COMMUNICATIONS AND SPECIAL INSPECTION BRANCH DIVISION-0F REACTOR PROGRAM-MANAGEMENT, NRR f
ATTACilMI'NT 2 1
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98-01 CATAWBA, UNIT 1 L
VALVE ALIGNMENT ISSUES i
DECEMBER 29 & 30, 1997 PROBLEM l
INADVERTENT INJECTION INTO REACTOR COOLANT SYSTEM (RCS) ON l
12/29.AND RCS LEAK ON 12/30 AS A RESULT OF VALVE ALIGNMENT PROBLEMS'.
CAUSE INADVERTENT INJECTION: MISSED PROCEDURE STEP RCS LEAK: UNDETERMINED (POSSIBILITY OF TAMPERING ELIMINATED)
SAFETY SIGNIFICANCE P0TENTIAL PROGRAMMATIC WEAKNESS IN PLANT CONFICURATION I
CONTROL AND POTENTIAL OPERATOR PERFORMANCE ISSUES.
L SEQUENCE OF EVENTS INADVERTENT INJECTION (UNIT IN MODE 4):
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.e LICENSEE ATTEMPTING TO FILL. COLD LEG ACCUMULATORS USING INTERMEDIATE HEAD SAFETY INJECTION (SI) PUMP "A".
1 1-l CONTACT:
E. BENNER, NRR/PECB AIT: RQ
REFERENCES:
10 CFR 50.72 #33459 & #33472 SIGEVENT: NQ
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e CATAWBA, UNIT 1 98-01 OPERATORS FAILED TO PERFORM A PROCEDURE STEP WHICH RESULTED IN THE COLD LEG INJECTION ISOLATION VALVE BEING LEFT OPEN (C0GNITIVE ERROR).
INJECTION TERMINATED IN =4-5 MINUTES (=3000 GALLONS).
PRESSURIZER HEATERS HAD PREVIOUSLY BEEN ENERGIZED FOR PRESSURIZER HEATUP, PRESSURIZER CONTINUED TO HEATUP DURING EVENT.
OPERATORS ATTEMPTED TO STABILIZE TEMPERATURE BY INITIATING PRESSURIZER SPRAYS, TEMPERATURE UNEXPECTEDLY WENT UP.
i EVENT NOTlFICATION RETRACTED WHEN LICENSEE DETERMINED THAT EMERGENCY SAFETY FEATURES ACTUATION AND LOGIC RELAYS NOT INVOLVED.
RCS LEAK (UNIT IN MODE 3):
AT 1922, LICENSEE DECLARES UNUSUAL EVENT (UE) DUE TO IDENTIFIED RCS LEAKAGE >.10 gpm (=40 gpm ACTUAL).
LICENSEE INITIATES C00LDOWN AT 60 F/hr.
~
CATAWBA, UNIT 1 38 01 UE TERMINATED AT 0115 ON 12/31.
LEAK LOCATED (SERIES DRAIN VALVES INC13 & 1NC106 ON RCS LOOP 1C FOUND TO BE NOT FULLY CLOSED): VALVES CLOSED AND LEAK TERMINATED.
DISCUSSION INADVERTENT INJECTION:
UNEXPECTED HEATUP RESULTED IN PRESSURIZER TECHNICAL SPECIFICATION HEATUP LIMIT (100 F IN 1 HOUR) BEING EXCEEDED.
UNEXPECTED "HEATUP" CAUSED BY (HOTTER) WATER IN THE PRESSURIZER OUTSURGING WHEN PRESSURIZER SPRAYS WERE INITIATED (TEMPERATURE MEASURED BY SURGE LINE TEMPERATURE DETECTOR).
e RCS TEMPERATURE BARELY INCREASED DURING EVENT.
MAXIMUM PRESSUR1ZER PRESSURE DURING EVENT WAS 599 psig:
e INITIAL PRESSURE WAS 560 psig.
RCS LEAK:
e VALVES WERE MANIPULATED DURING PRECEDING REFUELING OUTAGE BUT WERE VERIFIED CLOSED ON 12/25.
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CATAWBA, UNIT 1 98-01 LEAKAGE IDENTIFIED BY OPERATORS NOTING PRESSURIZATION OF REACTOR COOLANT DRAIN TANK.
ROOT CAUSE NOT YET DETERMINED: POSSIBILITIES ELIMINATED:
- TAMPERING
- REMOVAL OF LEAD SHIELDING IN THE AREA MISPOSITIONING
- INAPPROPRIATE VALVE DESIGN
- FOREIGN MATERIAL FOLLOWUE e
REGION II CLOSELY MONITORED LICENSEE RESPONSE TO EVENTS AND CONTINUE TO INSPECT LICENSEE ROOT CAUSE ANALYSES.
CURRENTLY, EVENTS ASSESSMENT, GENERIC COMMUNICATION, AND SPECIAL INSPECTION BRANCH (PECB) BELIEVES THESE TO BE UNRELATED PLANT SPECIFIC ISSUES AND DOES NOT INTEND TO ISSUE A GENERIC COMMUNICATION.
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OPECATING REACTOR PLANTS SIGN'FICANT EVEOTS SORT > Event Date.
QUERY > Event Type SIG & Close C et Date >= 08/13/97 & Event Type = =$1G=
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' DATE OF: 50.7? '-
' CLOSEGUT PLANT & Im!T-E-M 9UNDER DESCRIPTION OF EVEMT SIGNIFICANCE BRIEFING PRE D TER RECMP
- CALVERY CLIFFS 2 :04/03/97
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DIVER IN SPENT FUEL POOL CAME I4 CLOSE PROMINITY OTMER - NP PROCEDURES CARTER J.
NIGMLIGNT -
TO SPENT FUEL.
-COOK'1,2'~
09/08/973289fi. DESIGN AND OPERATIONAL DEFICIENCIES AFFECTING Safety-Reinted Cooling System BURTON W.
MIGNLIGNT
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i4ST ACCIDENT RECIRCULAtl0N.
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