ML20127P416

Provides Summary of 930113 Operators Reactors Events Briefing.List of Attendees & Viewgraphs of Elements Discussed Encl

ML20127P416
Person / Time
Site:	River Bend, Diablo Canyon
Issue date:	01/19/1993
From:	Chaffee A Office of Nuclear Reactor Regulation
To:	Grimes B Office of Nuclear Reactor Regulation
References
OREM-93-002, OREM-93-2, NUDOCS 9302010283
Download: ML20127P416 (16)

Text

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

l 1

JAN 191993 MEMORANDUM FOR: Brian K. Grimes,_ Director Division of Operating ileactor Support FROM: Alfred E. Chaffee, Chief Events Assessment Branch Division of Operating Reactor Support

SUBJECT:

OPERATING REACTORS EVENTS BRIEFING JANUARY 13, 1993 - BRIEFING 93-02 On January 13, 1993, we conducted an Operating Reactors Events Briefing (93-02) to inform senior managers from offices of the Commission, SECY, EDO, AEOD, IP, NRR, and regional offices of selected events that occurred since our last briefing on January 6, 1992. Attachment i lists the attendees. Attachment 2 presents the significant elements of the discussed events.

Attachment 3 contains reactor scram statistics for the year beginning January 1, 1993, through January 3, 1993, and the week ending January 10, 1993. No significant events were identified for input into the NRC performance indicator program.

Original tigned by Alfred E. Chaffee, Chief Events Assessment Branch Division of Operating Reactor Support Attachments: As stated DISTRIBUTION:

l Central Files cc w/ attachments: PDR See next page EAB R/F KGray DSkeen EBenner COrsini JRamsey LKilgore, SECY 28006G a %f S +' , /JL I DAB /DO S KGray AB/ ORS

'RDennig B/ DORS EAB/ DORS AChaffee

)[o[ l K EGoodwin gj 01/q\/93 01/f//93 01//9/93 01//j/93

~~' 1 OFFICIAL RECORD COPY j} T' ~ ~d f"~ }

DOCUMENT NAME: ORTRANS.EAG (G:KAG) ,

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\ Ot N.. .J  ?- lCll U $

9302010283 930119 ~~-

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PDR ORG NRRD PDR -

_ _ . . - . _ _ . . _ > _._.m.._ _ _ _. _...__ _ .- , _ __ _ _ . _ . __

l cc:

T. .Murley, NRR (12G18) D. Pickett, (PDIV-2)

F. Miraglia,-NRR (12G18) S. Black,.(PDIV-2)-

F. .Gillespie, NRR (12G18) S. Peterson, (PDV)

J. Partlow, NRR (12G18) T. Quay, (PDV)

S. Varga, NRR (14E4)

J. Calvo, NRR (14A4)

G. Lainas, NRR (14H3)

J. Roe, NRR (13E4)

J. Zwolinski, NRR (13H24)

M. Virgilio, NRR (13E4)

W. Russell, NRR (12G18)

J. Richardson, NRR (7D26)

A. Thadani, NRR (8E2)

S. Rosenberg, NRR (10E4).

C. Rossi, NRR (9A2) 4 B. Boger, NRR (20H3)

F. Congel, NRR-(10E2) l D. Crutchfield, NRR (11H21)

, W. Travers, NRR (11B19) l D. Coe, ACRS (P-315)  ;

E. Jordan, AEOD (MN-3701)

T. Novak, AEOD (MN-9112)

L. Spessard, AEOD_(MN-3701)

K. Brockman,. AEOD (MN-3206)

S. Rubin, AEOD (MN-5219)

M. Harper, AEOD (MN-9112)

J. Grant, EDo'(17G21)

R. Newlin, GPA (2G5)

, E.-Beckjord, RES (NLS-007)

A. Bates, SECY-(16G15).

G. Rammling, OCM (16G15)

T. Martin, Region I W. Kane, Region I C. Hehl, Region I S. Ebneter, Region II E. Merschoff, Region II B. Davis, Region III E. Greenman, Region III J. Milhoan, Region IV B. Beach, Region IV J.B. Martin, Region V K.-Perkins,-Region V bec: Mr.ESam Newton, Manager Events Analysis Department ~

Institute of Nuclear Power Operations

-1100 Circle 75 Parkway, Suite 1500 Atlanta,- GA 30339-3064

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

ATTACHMENT 1 LIST OF ATTENDEES OPERATING REACTORS-EVENTS FULL BRIEFING (93-02)

JANUARY 13, 1993 NAME OFFICE NAME OFFICE E. GOODWIN NRR S. PETERSON NRR K. GRAY NRR T. KIM' NRR D. SKEEN NRR C. BEARDSLEE NRR E. BENNER NRR P. ENG NRR J. RAMSEY NRR -R. ZIMMERMAN NRR R. DENNIG NRR J. ROE NRR B. GRIMES NRR M. CONGDON OIP C. ORSINI NRR V. BENAROYA AEOD S. BLACK NRR T. SHEDLOSKY OCM/IS J. STANG NRR K. HART SECY R. SCHAAF NRR J. MITCHELL OEDO S. ROSENBERG NRR TELEPHONE ATTENDANCE (AT ROLL CALL)

Recions Resident Inspectora

- Region I Diablo Canyon Region II Region III Region IV

- Region V AIT Team Leaders- Misc.

6 4

ATTAD M UM 2 OPERATING REACTORS EVENTS BRIEFING 93-02 LOCATION: 10 Bil, WHITE FLINT WEDNESDAY, JANUARY 13, 1993, 11:00 A.M.

RIVER BEND P00R RADIATION PROTECTION i l

PRACTICES DURING REFUELING OUTAGE I DIABLO CANYON 1 & 2 l IMPROPER LOW TEMPERATURE 0VERPRESSURE PROTECTION (LTOP) SETPOINT  :

l CNERN0BYL, UNIT 2 OCTOBER 1991 TURPINE-GENERATOR 1 FIRE (UPDATE)

PRESENTED BY: EVENTS ASSESSMENT BRANCN DIVISION OF OPERATING REACTOR ,

SUPPORT, NRR

93-02 RIVER BEND POOR RADIATION PROTECTION PRACTICES DURING REFUELING OUTAGE OCTOBER 1, 1992 EROB.LEM INADEQUATE CONTROL OF RADI0 ACTIVE MATERIAL RESULTED IN AN UNP0STED HIGH RADIATION AREA AND TRANSFER 0F LOW LEVEL RADI0 ACTIVE MATERIAL TO UNAUTHORIZED RECIPIENT.

l CAUSE FAILURE BY RADIATION PROTECTION (RP) PERSONNEL TO PROPERLY SURVEY RADWASTE MATEPIALS AND MONITOR WORK ACTIVITIES.

l i SAEEIY SLGlHBlaEE ,

1 A POTENTIAL EXISTED FOR OVEREXPOSURE TO WORKERS.

l i

D11CRSS10Ji e ON 10/01/92, TWO RADWASTE WORKERS AND AN RP TECHNICIAN l RECEIVED HIGHER TNAN EXPECTED DOSES OF RADIATION WHILE l SEGREGATING TRASH FOR COMPACTION.

o A BAG 0F TRASH TAGGE0 "< 2 MR/HR" WAS ACTUALLY READING

14,000 MR/HR ON CONTACT AND 22.0 MR/HR AT 18 INCHES, l RESULTING IN AN UNMARKED HIGH RADIATION AREA.

l l

l CONTACTS: D. SKEEN, NRR/ DORS AIT: NO

( J. GAGLIARDO, RIV/DRS SIGEVENT: TBD-

REFERENCES:

IR S0-448/92-33 AND l

LER S0-448/92-020 .

l 1

4 RIVER BEND 93-02

• A SECOND UAG WAS FOUND IN THE SAME CONTAINER WHICH HAD NO RADI0 ACTIVE MATERIAL TAG AND WAS READING 800 MR/HR ON CONTACT.

o SURVEYS OF OTHER STORAGE AREAS FOUND TWO MORE BAGS MISLABELED.

• THE 14 R/HR BAG CONTAINED USED VALVE PACKING MATERIAL FROM THE "A" REACTOR RECIRC PUMP SUCTION VALVE.

1 o THE VALVE IS LOCATED IN THE DRYWELL IN A VERY HIGH RADIATION AREA / CONTAMINATION ZONE.

! o THE WORK WAS PERFORMED BY THREE DIFFERENT TEAMS. EACH I

TEAM CONSISTED OF TWO MECHANICS AND AN RP TECHNICIAN.

e THE FIRST TEAM -REMOVED ALL BUT YHE LAST RING OF PACKING AND PUT THE MATERIAL IN A RED BAG, THEN EXITED THE DRYWELL DUE TO HEAT STRESS.

e THE SECOND TEAM CONTINUED THE WORK.

o THE RP TECH STARTED THE AIR SAMPLER AND LEFT TO C0VER ANOTHER J08. THE MECHANICS REMOVED THE LAST RING.0F PACKING AND PLACED IT IN A CLEAR PLASTIC BAG ALONG WITH i

THE TAGS AND WRAPPINGS FROM THE NEW PACKING MATERIAL.

• THE ORIGINAL TEAM, WEARING RESPIRATORS, RETURNED AND REPACKED THF GLAND BEFORE THEIR STAY TIME WAS UP. THE l RP TECH SURVEYED THE RED BAG. THE CLEAR BAG WAS NOT SURVEYED.

l

I RIVER BEND 93-02 l e A 1HIRD TEAM WAS SENT IN TO TOROUE THE GLAND AND REMOVE  !

ALL TOOLS AND MATERIALS. THE CLEAR PLASTIC BAG WAS PUT IN THE TRASH RECEPTACLE AT THE STEP 0FF PAD.

• ON 09/04/92, AN RP TECH TAGGED THE TRASH BAG FROM THE STEP 0FF PAD AS "< 2 MR/HR" AND THE ERROR WAS NOT DISCOVERED UNTIL 10/01/92.

EOLLOWLif a MANY OTHER EXAMPLES OF P00R SURVEYING AND HANDLING OF  !

l RADWASTE DURING THE OUTAGE WERE IDENTIFIED, INCLUDING j THE TRANSFER OF RADI0 ACTIVE MATERIAL TO AN UNAUTHORIZED  !

RECIPIENT.

! e  ;

NO PERSONNEL RECEIVED EXPOSURES EXCEEDING THE LIMITS OF 10 CFR PART 20.

• REGION IV CONDUCTED A REACTIVE INSPECTION OF THE RADIOLOGICAL CONTROL PROBLEMS REGARDING THE CONTROL AND l SURVEYING 0F RADI0 ACTIVE WASTE RESULTING FROM OUTAGE i ACTIVITIES.

l l e THE INSPECTION RESULTED IN 16 VIOLATIONS IN WHICH l RADIATION SURVEYS WERE NOT PERFORMED, RP PROCEDURES l WERE NOT FOLLOWED, AND CONTAMINATED MATERIAL WAS l TRANSFERRED TO AN UNAUTHORIZED RECIPIENT.

l o THE LICENSEE RECEIVED A SEVERITY LEVEL III VIOLATION l

AND A $100,000 CIVIL PENALTY.

93-02 DIABLO CANYON, llNITS 1 & 2 IMPROPER LOW TEMPERATURE OVERPRESSURE PROTECTION (LTOP) SETP0 INT JANUARY 8, 1993 EROBLEB LOW TEMPERATURE OVERPRESSURE PROTECTION (LTOP) SETPOINT MAY BE T00 HIGH FOR MODES 4, S, AND 6.

CAUSE LTOP SETPOINT OF 450 PSIG WAS CALCULATED BY WESTINGHOUSE WITHOUT CONSIDERATION OF THE DYNAMIC PRESSURE DIFFERENCE BETWEEN THE REACTOR PRESSURE VESSEL AND THE PRESSURE SENSORS.

SAEETY SEMEIEANCE IMPROPER LTOP SETTINGS WOULD ALLOW AN OVERPRESSURE CONDITION TO EXIST WHICH COULD POTENTIALLY CAUSE BRITTLE FRACTURE OF THE REACTOR PRESSURE VESSEL.

DISClLSSLO11 e AS A RESULT OF REVIEWING AN INP0 OPERATING EXPERIENCE REPORT, THE LICENSEE DISCOVERED THAT LTOP SETPOINT OF 450 PSIG WAS CALCULATED WITHOUT CONSIDERATION OF PRESSURE DROP DUE TO PIPING LOSSES BETWEEN THE REACTOR PRESSURE VESSEL AND THE PRESSURE TRANSMITTERS WHICH ARE LOCATED ON THE REACTOR COOLANT SYSTEM PIPING BETWEEN THE STEAM GENERATOR AND REACTOR COOLANT PUMP.

CONTACTS: E. BENNER, NRR/ DORS AIT: N0_

C. ORSINI, NRR/ DORS SIGEVENT: TBD

REFERENCE:

10 CFR 50.72 #24851 AND LER 50-498/92-019

DIABLO CANYON, 93-02 UllITS 1 & 2 o LICENSEE HAS INSTITUTED ADMINISTRATIVE CONTROLS TO ENSURE THAT AN OVERPRESSURE CONDITIO!I DOES NOT OCCUR.

e REACTOR SYSTEMS BRANCH ANALYSES INDICATE THAT INITIAL LTOP cal.CULATIONS HAVE APPR0XIMATELY 35 PSI DESIGN MARGIN. DIABLO CANf0H HAS NOT YET DETERMIllED THE MAGNITUDE OF THE ERROR FOR TiiE PIPING CONFIGURATION IN QUESTION.

• A SIMILAR OCCURRENCE AT COMANCilE PEAK RESULTED IN THE LICENSEE SUBMITTING A T.S. CHANGE TO LOWER THE LTOP SETPOINT BY 39 PSI.

SIMILALEVERS IMPROPER LTOP SETPOINTS DUE TO CALCULATIONAL ERRORS HAVE BEEN IDENTIFIED AT SOUTil TEXAS AllD COMANCHE PEAK.

E0LLQWHE THE CONDITIONS AT SOUTil TEXAS AND DIABLO CANYON WERE IDENTIFIED AS A RESULT OF INP0 OPERATING EXPERIENCE #5691.

THE EVENTS ASSESSMENT BRANCH IS STUDYING THE NEED FOR AN IllFORMATION NOTICE TO INFORM LICENSEES FORMALLY OF THIS POTENTIAL DEFICIENCY IN THE CALCULATION OF LTOP SETPOINTS.

FP I E F !!'S "3- 0' - '-

PiAnto crfyo , U:JITS 1 fin ?

! REACTOR COOLANT SYSTEM STEAM GENERATOR REACTOR t

! COOLANT i

ll PUMP )

PRESSURE '

.\ /. TRANSMITTER '

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) V  :

I x "

_ /V l HOT LEG 4 REACTORE 4 PRESSUREt -l

1VESSER COLD LEG

~

).0/ REGION OF INTEREST

\ FOR LTOP CONSIDERATIONS

/ ,

f

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w<, m _ e = w_ w --- r- % w.. - -- w -w

h 93-02 CllERN0BYL, UNIT 2 TURBINE-GENERATOR FIRE (UPDATE)

OCTOBER 1991 EROBLIM FAILURE OF ONE TURBINE-GENERATOR RESULTED IN SIGNIFICANT FIRE. -

t

_CAME REVERSE POWER TO TURBINE-GENERATOR DUE TO MALFUNCTION OF GENERATOR OUTPUT BREAKER.

SAEETY SMEICANCE LOSS OF SAFETY-RELATED EQUIPMENT.

DACKGR0MQ

• UNITS ARE RBMK-1000 (GRAPHITE MODERATED, LIGHT WATL.1 -

COOLED),

P

• EACH UNIT HAS 2 TUP.BINE-GENERATOR SETS (500 MWE EACID.

t

• UNITS SHARE A COMMON TURBINE BUILDING.

EVINT DEXCRIPT10]f a UNIT WAS BEING RETURNED TO SERVICE FROM' MAINTENANCE '

0UTAGE.

CONTACT: J. RAMSEY, NRR/ DORS AIT: _RQ ,

SIGEVENT: ._RQ l .. .. _

CHERNOBYL, UNIT 2 93-02 e

START-UP TESTING IDENTIFIED MINOR PROBLEMS WITH TURBINE-GENERATOR # 4 AND NECESSITATED THAT IT BE SifUT DOWN FOR CORRECTIVE MAINTENANCE.

o MALFUNCTION OF GENERATOR OUTPUT BREAKER ALLOWED A REVERSE POWER SITUATION ON THE TURBINE-GENERATOR, e

RESULTING DAMAGE TO TURBINE-GENERATOR RESULTED IN RELEASE OF HYDR 0 GEN FROM TURBINE-GENERATOR COOLING SYSTEM AND SUBSEQUENT FIRE. '

o COLLAPSE OF ROOF IMPACTED USE OF 4AIN AND EMERGENCY FEEDWATER.

• PLANT PRESSURE WAS REDUCED TO LESS THAN APPR0XIMATELY 220 PSI TO ALLOW USE OF LOW PRESSUP.E INJECTION SYSTEMS.

o FIRE WAS EXTINGUISHED WITHIN 3 TO 4 HOURS.

o REPORTED RELEASE OF 0.00036 CURIES (CONTAMINATION ON UNIT 2 ROOF FROM UNIT 4 ACCIDENT).

f

. - . . - ~ . - . _ _s. _ - _ -_ m .-_..-.______ -_-_..m.-_.-__m. _ ____m ____. _ _ _-___._ ___

BRIEf LNG' 93-02 CHERNOBYL, UNIT 2 o

TYPICAL RBMK-1000 RE. ACTOR t' \

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p. eip L .I , .' , 4 7 lb i  %

V (w $ m/ ,

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1) Reactor

2) Individual stean/ water pipes

3) Horizontal tirum separators

4) Drain pipes

5) Primary circulating pump suction header

6) Primary c.irculating pump suction piping

7) Primary circulating pum

8) Prinary circulating pu=pp isolation valve (s)

9) Prinary circulating pump discharge pipe

10) Prinary circulating pur.p discharge header

11) Croup discharge header

12) Individal pressure tube water pipes

13) Refueling nachine

14) Pain stean piping i

e

+ ATTACHMENT 3 t[ ACTOR SCRAM teporting Perledi 01/06/93 to 01/10/93 Y1D VfD ABOYE BELCW f10 g bakt ( 1*11 ER, P M Edli Ct*'PL I C A TM,} R$ 1% EM 01/03/93 St AatorX 1 100 SM tosipwnt f ailure wo 1 0 1 01/03/93 LintkiCK 2 69 SA Eqairnent f eiture No 1 0 1 01/07/93 BRAIDutoD 1 M $A Igalps nt failure No 't 0 1 01/07/93 CUAD Citits 2 100 $A teattrent f ailure No 1 0 1 01/06/93 stM1 1 100 LA Maintenance trror No 1 0 1 Note: Year lo Date (fic) totsis itelWe tvents Within the Caterdar Year Irdicated ty The Erd Date of The speelfled Reporting Perlo E16-10 Page:1 01/14/9

. _ _ . _ . . . - _ _ _ _ _ _ _ . . . _ _ _ . _ . . . _ . . _ . _ _ _ . _ _ . _ _ _ . . _ _ , _ ~ .._m..__.-_-._.. _.._m._.._..

r r

,' COM7Atl$0N CF WittLT StkAM $1All5flC$ V11H lhDuttry avitACfM Fitt0D [W0lWG 01/01/93 to 31/03/93 r

kWE R iM3 1972a jp93e j Wge 1939, ,

Of WittLT WttrLY WE(KLT VitKLY WitKLY FJ8" t82.H sonA*$ AvtaAct Avttact Avtaact AvitAct Avtasct '

(vt0) .

POVtt LttAi!R TEAN 00 t0 VAL,10 1$$

toulPMIW1 FA M Utf* 2 4.7 2.6 2.0 3.4 3.1 OtSICW/lkSTAllAtltN (#tbe* 0 0.0 - * * * .

I orta Atluc (Rats

• 0 0.0 0.8 0.6 0.5 1.0 NAls1 p Autt (R204* 0 0.0 - - *

• E xit e = At

• 0 0.0 * * *

• 01stP* 0 0.0 - *

• f.1 l l

l subtotet 2 4.7 3.4 3.5 3.9 4.2 1 l

Pourt Liti IMAN 1$1 '

EcclPMINT FAILUtt' 0 0.0 0.4 0.3 0.4 0.3 L OfffCE/ltffALLAfl0N IRROR* 0 0.0 - - *

• orItATlwc ta#0A* 0 0.0 0.2 0.2 0.1 0.3 MAltitwAhtt genot* 0 0.0 - * * *

{

(XitAWAL* 0 0.0 - * * *

[

01htt' O 0.0 * * -

• Suttotal 0 0.0 0.6 0.5 04 0.6 101AL 2 4.7 4.0 4.0 4.4 4.8 F

1993 1992 1991- - 1990 1989 $

WD. OF VEEKLY VtfKtY WitLY wtKLt EtrLY-l SCRAM tvPE $t#AMs AvtAAGE AYtaAGE AVERAtt AvtaA;E AVIAAGE (TTD) l 701AL AU!CHAYlc 3 CRAMS- 1 2.3 3.0 3..'l 3.2 3.9 l

' n 101AL MANUAL SCRAMS 1- 2.3 1.0 0.7 1.2 0.9

• Detaltal trentdown not in database for 19(and earlier ,

• (KitKhal cause inctuoed in (OulPMthf FAILURf .

• MAlhttWANCE E8RO# and Ot$1GN/th11ALLAll0W fktok causes included in CPEA4t!WG ERRot

• OTHER cause included h f0VlPMENT lAILDRE 1991 and 1990 i

?

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

l .

1 s .

CCMFAtlSOW of WilrLV $ CRAM $1Afil11C5 W11H lhDU11tf AvtRActs 4

PEttrx Inclug 01/0I./93 tt 01/10/93 6 matt 1993 1W2' 1991* 1990* 1989*

0 AIKLY WLfKLY Vt[KLY WEEKLY WIKLY yiRAM C A'J!E $ CRAM $ AVERACE A% f R ACF. AVIRACE AVERACE AVIRACI (YTS) *

• Wit Cat Atle l'AW OR EWAt' 10151 to.it PMtW1 F AILURt* 7 2.8 24 2.9 3.4 3.1 Oft lCW/14t1ALL4110N ERR 0e* 0 0.0 - - -

• OftkAflhG IRROR* 0 0.0 0.8 0.A 0.5 1.b MAlkfENANCE tRROR* 1 0.7 - - =

• ExtfRhaL* 0 0.0 - - - -

O'itR* O 0.0 - - -

0.1 subtotal 3 3.5 3.4 3.5 3.9 4.2 Powtt LEst 1ktW 15%

louttattNT F AILURt* u 0.0 0.4 0.3 0.4 0.3 Df 510w/init ALLAll0h (RROR* 0 0.0 - - - -

OrtR ATikC ERRon* 0 0.0 0.2 0.2 0.1 0.3 MA!WithahCE IRRon* O 0.0 - - - -

(X1ERWAL* 0 0.0 - - - -

01NfR* 0 0.0 - - - -

SWtotal 0 0.0 0.6 0.0 0.5 0.6 10fAL 3 3.5 4.0 4.0 4.4 4.8 1993 1W2 1991 1990 1989 NO. OF VtEKLY 7tKLY M EtLY WIKLY W IKLT lilAf.11fi SCRAMS AVERACE AVERAGE AVIRACE AVERACE AVERACE (YTD)

ICIAL AUTCHAt!C SCRAMS 3  ?.8 3.0 3.3 3.2 3.9 10!LL MANUAL SCRAMS 0 0.7 1.0 0.7 1.2 0,9

• Detailed brttido n rot in riotabase for 19Q eM earlier EK1tRNAL cant ircluded in !?JIPufW1 FAli.URE

- NAth1ThANCE ERROR aM DESIC%/ int 1 Alt.AllCW tRROR causes trelused in C#ERAi!WC ERROR

- OTHER cause included in EoulPMENT FAILURF 1991 and 1990

_ _ _ _ . _ _ _ _ _ - _ _ _ _ - - _ _ _ -