ML20202A986
| ML20202A986 | |
| Person / Time | |
|---|---|
| Issue date: | 02/05/1998 |
| From: | Richard S NRC (Affiliation Not Assigned) |
| To: | Roe J NRC (Affiliation Not Assigned) |
| References | |
| OREM-98-002, OREM-98-2, NUDOCS 9802110040 | |
| Download: ML20202A986 (11) | |
Text
-
l Fobruary 5, 1998 j
MEMORANDUM TO: Jack W. Roe, Acting Director Division of Reactor Program Management i
FROM:
for-Ecuart A. Richards, Chief t0riginal signed by Donald P. Norkin l Events Assessment, Generic Communications and Specialinspections Branch
' Division of Reactor Program Management
SUBJECT:
OPERATING REACTORS EVENTS BRIEFING FEBRUARY 4,1998 - BRIEFING 98-02 On February 4,1998, we conducted an Operating Reactors Events Briefing (98-02) to inform senior managers from offices of the Commission, AEOD, RES, NRR and regional offices of selected events that occurred since our last briefing on January 28,1998. Attachment i lists the attendees. Attachment 2 presents the signi'icant elements of the discussed event.
The siatements contained in the attached briefing slides represent the best information currently available to the NRC Future followup could produce new information that may alter the NRC's current view of the events discussed.
Attachments:
As stated (2)
~ cc w/atts:
See next page
-CONTACT: Kathy Gray, NRR.
(301) 415-1166 cc w/atts:
5 See next page CONTACT: Kathy Gray, NRR (301) 415-1166 i
D STRIBUTION: (w/attsi Il Shd3 PbBLIC LKilgore, SECY
' PECB R/F.
KGray DSkeen j
i'OCUMENT NAME: G:\\KAG\\ORTRANS (a veceive e copy of thfe document. Indicete in the box:
copy "C* = Copy without attachrnent/ enclosure
- E' s Copy with ettechrnent/ enclosure "N" = No
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PECB d l PECB[/ 4))
C/PECB Ydi N NAME Korev:vikd N4Ju hq1d DSkee d ) N. ROefsda V SRkherde\\W DATE O2/DA /98 s/ O2/o $ (98 02/7f /98 02M /9tI OFFICIAL RECORD CSPY -
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UNITED STATES s
j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30seMM01 Febrti y 5, 1998 MEMORANDUM TO: Jack W. Roe, Acting Director Division of Roactor Program Management
\\
FROM:
Stuart A. Richards, Ch Events Assessment, Generic Communications and SpecialInspections Branch Division of Reactor Program Management
SUBJECT:
OPERATING REACTORS EVENTS BRIEFING FEBRUARY 4,1998 - BRIEFING 98-02 On February 4,1998, we conducted an Operating Reactors Events Briefing (98-02) to inform senior managers from offices of the Commission, AEOD, RES, NRR and regional offices of selected events that occurred since our last briefing on January 28,1998. Attachment i lists the l-attendees. Attachment 2 presents the significant elements of the discussed event.
1 The statements contained in tha attached briefing slides represant the best information currently l
available to the NRC. Future followup could produce new information that may alttir the NRC's current view of the events discussed.
" Attachments:
As stated (2) cc w/atts:
See next page CONTACT: Kat,y Gray, NRR l
(301) 415-1166 4
t w
1.
=.
- cc:
S. Collins, NRR (012G18)--
S; Alexander, NRR (0-9A1)
F. Miraglia, NRR (0-12G18).
- K. Naidu, NRR (0-9A1)
F. Gillespie, NRR (0-12G18) =
A. Pal, NRR (0-7E4)
F.; Boger, NRR (014E4) --
B. Sheron, NRR (0-12G18).
J. Zwolinski, NRR (014H3)
. E.' Adensam, NRR (013E4)-
- 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, AEOD (T-4D18)
- C. Rossi, AEOD (T-4A9)-
F. Congel, AEOD (T-4D28)
[
R. Barrett, AEOD (T-4A43) l-S. Rubin, AEOD (T-4D28)
. M. Harper, AEOD (T-4A9)
W. Leschek, AEOD (T-4A9)
G. Tracy, EDO (016E15)
J. Gilliland, PA (0-2G4) -
- D. Morrison, RES (T-10F12):
W.- Hill, SECY_(0-16G15)
. H. Miller, Region 1
' C. Hehl, Region I L. Reyes, Region 11-
' J. Johnson, liegion 11
- S. Vias, Region ll:
A. Beach, Region til.
- G. Grant, Region 111
- E. Mershoff, Region IV P. Gwynn, Region IV
- K. Perkins, Region IV/WCFO ~
. G. Fader, INPO ~
LJ. Zimmer, DOE =
d
LIST OF ATTENDEES OPERATING REACTORS EVENTS FULL BRIEFING (98-02)
February 4,1998 i
RAME OFFICE NAME OFFICE D. Skeen NRR S. Stewart
- OCM/SJ R._ Dennig NRR J.- Vora RES/DET T.Koshy NRR-C. Rossi AEOD h
A. Pal NRR R. Correia NRR J. Calvo NRR S. Alexander NRR-J. Petrosino -
NRR K. Naidu -
NRR TELEPHONE ATTENDANCE (AT ROLL CALL)
Reaions Resident inspectors
- Region i Region 11 Peach Bottom Region 111 Region IV Misc.
ATTACHMENT 1
98-02 OPERATING REACTORS EVENTS BRIEFING 98-02 LOCATION:
0-10B11, WHITE FLINT WEDNESDAY, FEBRUARY 4, 1998 11:00 A.M.
L GENERIC-LOW AND. MEDIUM VOLTAGE CIRCUIT BREAKER FAILURES PRESENTED BY:
EVENTS ASSESSMENT, GENERIC COMMUNICATIONS AND SPECIAL INSPECTION BRANCH DIVISION OF. REACTOR PROGRAM MANAGEMENT, NRR ATTA0fENT 2
~
98-02 GENERIC TOPIC:
LOW AND MEDIUM-V0LTAGE METAL CLAD CIRCUIT BREhKER AGE-RELATED FAILURES 1996-1998 PROBLEM RECENT. NUCLEAR INDUSTRY OPERATING EXPERIENCE INDICATES THAT AGE-RELATED CIRCUIT BREAKER FAILURES ARE INCREASING.
CAUSE l
INADEQUATE MAINTENANCE AND/0R REFURBISHING.
i-SAFETY SIGNIFICANCE COMMON MODE FAILURE 0F MULTIPLE BREAKERS COULD AFFECT MANY SAFETY-RELATED SYSTEMS.
DISCUSSION o
_ HISTORICALLY,1 LOW. VOLTAGE (<600-V) AND MEDIUM-VOLTAGE e
(601-V TO 15-kV) CIRCUIT BREAKERS HAVE BEEN GENERALLY RELIABLE COMP 0NENTS.
o OVER THE LAST FEW YEARS, AN INCREASE IN THE NUMBER OF AGE-RELATED CIRCUIT BREAKER FAILURES HAS OCCURRED.
CONTACT:
DAVID SKEEN. NRR/DRPM/PECB AIT: ND
REFERENCE:
INDUSTRY EXPERIENCE SIGEVENT: NO
~
GENERIC TOP.TC 98-02 o
FAILURE MODES:
FAILURE TO OPEN FAILURE 'io CLOSE/ REMAIN CLOSED SLUGGISH OPERATION o
ORIGINAL MAJOR MANUFACTURERS:
GENERAL tLECTRIC TYPE AM & AMH (MAGNE-BLAST 4-kV)
TYPE AK & AKR (480-V) l WESTINGHOUSE TYPE DHP (4-kV)
TYPE DB & DS-(480-V)
ABB/ITE TYPE HK (4-kV)
TYPE K-LINE-(480-V) o NEW MANUFACTURERS HAVE ENTERED THE MARKET, USING VACUUM OR SF6 AS THE ARC QUENCHING MEDIUM RATHER THAN THE ORIGINAL AIR-BLAST DESIGN:
- SIEMENS (VACUUM)
- MERLIN-GERIN (SF6)
- YASKAWA (SF6) l
I.
GENERIC:T0PIC 98 :o;--WHY ARE AGE-RELATED FAILURES ON THE INCREASE?
1 INADEQUATE MAINTENANCE-INCOMPLETE / AMBIGUOUS VEND 0R INSTRUCTIONS-DESIGN CHANGES NOT-WIDELY DISSEMINATED LOSS OF OEM DESIGN INF0 DUE TO SALE OF MANUFACTURING l
FACILITY L
PROLIFERATION-0F THIRD PARTY-COMMERCIAL DEDICATION AND REPAIR / REFURBISHMENT GUTFITS INADEQUATE REPLACEMENT PART QUALITY-4 INADEQUATE LICENSEE / VENDOR INTERFACE-01.S0ME MOLDED: CASE CIRCUIT BREAKERS HAVE ALSO SHOWN SIGNS.0F AGING.
FOLLOWUPt Eo THE ELECTRICAL POWER RESEARCH INSTITUTE'S NUCLEAR
' MAINTENANCE APPLICATIONS CENTER (EPRI/NMAC) AND SOME=
LICENSEES HAVE FORMED USERSLGROUPS FOR USERS OF THE THREE MAJOR VEND 0RS' BREAKERS.
o EELB-HASLISSUED TEMPORARY INSTRUCTION 2515/137 TO PERFORM INSPECTIONS AT EIGHT PLANTS (TM0 PER REGION) BY SEPTEMBER 30, 1998, TO DETERMINE IF FURTHER REGULATORY ACTION IS WARRANTED.
li
. 4,.
GENERIC TOPIC
- 98 o' HQMBfWILL CONTINUE TO INSPECT THE THREE MAJOR CIRCUIT BREAKER VEND 0R FACILITIES-AND SOME 0F.THE THIRD PARTY-REPAIR / REFURBISHMENT OUTFITS.
o PECB WILL WORK WITH.EELB AND HQMB TO DEVELOP ANY GENERIC COMMUNICATIONS THAT MAY---BE NEEDED TO ADDRESS: FINDINGS FROM.-
THE INSPECTIONS.
L o
NRR TECHNICAL CONTACTS:
i AMAR PAL,.EELB/DE-301-415-2760 ANP@NRC. GOV-KAMAL NAIDU, HQMB/DRCH
.f301-415-298D KRN@NRC.G0V.
STEVELALEXANDER, HQHB/DRCH
-301L-415-2995 SDA@NRC.G0V DAVE SKEEN, PECB/DRPM
'301-415-1174 DLS@NRC. GOV r
[. -.
leAgg n-2 r
RECENT CIRCUlT BREAKER FAILURE EVENTS 6/11/96 - DRESDEN 3: A GE MAGNE-BLAST BREAKER FAILED TO OPEN ON DEMAND DUE TO HARDENED GREASE ON.
THE TRIP LATCH ROLLER BEARING. ON 6/20/96, THE UNIT
-WAS SHUTDOWN'AFTER LICENSEE INVESTIGATION DETERMINED 13 OTHER BREAKERS COULD BE SUSCEPTIBLE TO THE SAME FAILURE.
9/16/96 - PERRY: A NEW ABB TYPE K-LINE BREAKER.
PREMATURELY TRIPPED ON OVEPsCURRENT DUE TO REVERSED LEADS ON ONE OF THE PHASE CURRENT SENSORS. SUBSEQUENT'/ENDOR INSPECTION LEADS TO ISSUANCL OF IN 98-03.
'7/22/97 & 8/5/97 - CLINTON: FAILURE-TO-OPEN OF-TWO W TYPE DHP BREAKERS PROMPT NRC TO SEND AN AUGMENTED INSPECTION TEAM.
I-10/14/97 - INDIAN POINT 2: UNIT SHUTDOWN AFTER REPEATED FAILURES OF W TYPE DB-50 BREAKERS TO OPEN.
12/18/97 -INDIAN POINT 3: UNIT SHUTDOWN AFTER A W TYPE DS-416 BREAKER. STUCK CLOSED.
Briefing 98-02 Generic AMPTECTOR DIRECT TRIP ACTUATOR CROSS BAR BREAKER OPEN s
RESET LEVER
(,'l BREAKER TERMf NALS (2)
AMPTECTOR CONNECTION r - - er - - - - -
i g-lo
[o#
I [*o
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BREAKER
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o TRIP BAR PLUNGER-
-TRIP DIREC ON TRIP LEVER KEEPER-SPRING ACTUATOR DIAGRAM q
^r M..A\\ M *.
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POSITION OF ACTUATOR IN A DB BREAKER