ML20125C151

Forwards Info Re 921118 Operating Reactors Events Briefing (92-19).Meeting Conducted to Inform Senior Managers from Ofcs of Aeod,Acrs,Res,Nrr & Regional Ofcs of Selected Events That Occurred Since 921104 Briefing

ML20125C151
Person / Time
Issue date:	11/25/1992
From:	Chaffee A Office of Nuclear Reactor Regulation
To:	Grimes B Office of Nuclear Reactor Regulation
References
NUDOCS 9212110071
Download: ML20125C151 (11)

Text

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NOV 2 51992 MEMORANDUM FOR:

Brian K. Grimes, Director Division of Operating Reactor Support FROM:

Alfred E.

Chaffee, Chief Events Assessment Branch Division of Operating Reactor Support

SUBJECT:

OPERATING REACTORS EVENTS BRIEFING NOVEMBER 18, 1992 - BRIEFING 92-19 1

On November 18, 1992, we conducted an Operating Reactors Events Briefing (92-19) to inform senior managers from offices of AEOD, ACRS, RES, NRR, and regional offices of selected events that occurred since our last briefing on November 4, 1992.

Attachment i lists the attendees. presents the significant elements of the discussed event. contains reactor scram statistics for the weeks ending 11/08/92 and 11/15/92.

No significant events were identified for input into the NRC performance indicator program.

Q{ LEI.nal $lgn@d by Alfred E.

Chaffee, Chief Events Assta oment Branch Division of Operating Reactor Support Attachments:

As stated DISTRIBUTION:

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T. Murley, NRR (12G18)

R. Wharton (PDIII-3) l F. Miraglia, NRR (12G18)

J. Hannon (PDIII-3)

F. Gillespie, NRR (12G18)

J. Partlow, NRR (12G18)

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)

B. Boger, NRR (10H3)

F. Congel, HRR (10E2)

D. Crutchfield, NRR (11H21)

W. Travers, NRR (11B19)

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 (2GS)

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: INPD ATTN:

J.

Cowan 1100 Circle 75, Suite 1500 Atlanta, GA 30339 I

i

i ATTACHME!1T 1 LIST OF ATTENDEES OPERATING REACTORS EVENTS FULL BRIEFING (92-19) 110VEMBER 18, 1992 l{Alig OFFICE I!AME OFFICE E.

BEN!1ER HRR C.

ROSSI NRR R. DENNIG HRR T.

KING NRR T. KOSHY NRR R. WHARTON NRR K. GRAY NRR C.

BERLINGER NRR J. O'BRIEN NRR R.

SPENCE AEOD D. GARCIA NRR J.

IBARRA AEOD C. GRIMES HRR V.

BEHAROYA AEOD J. PARTLOW NRR W.

MINNERS RES J. ROE HRR D.

COE ACRS C. THOMAS NRR TELEPHONE ATTENDANCE

( AT ROLL CALL)

Ee.r:19.nn Resident Inspectors Region I Callaway Region II Region III Region IV Region V AIT Team Leaders Mi m Callaway

=.

ATTACHMENT 2 I

i OPERATING REACTORS EVENTS BRIEFING 92-19 EVENTS ASSESSMENT BRANCH LOCATION:

4 Bil, WHITE FLINT WEDNESDAY, NOVEMBER 18, 1992, 11:00 A.M.

7 CALLAWAY, UNIT 1 UNRECOGNIZED FAILURE OF ALL CONTROL ROOM-ANNUNCIATORS =

(UPDATE)

(AIT)

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yew y

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92-19 CALLAWAY, UNIT 1 UNRECOGNIZED-FAILURE OF ALL i

CONTROL ROOM AWNUNCIATORS (UPDATE)-

OCTOBER 17, 1992 j

PROBLEM UNRECOGNIZED LOSS OF ALL ANNUNCIATORS WITH PLANT AT POWER.

CAUSE L

LICENSEE MAINTENANCE ON ONE ANNUNCIATOR POWER SUPPLY-L RESULTED IN A LOSS OF POWER TO ALL ANNUNCIATORS AND l

DISABLED ALARM INPUTS TO THE PLANT _ COMPUTER.

OPERATIONS L

MANAGEMENT DID NOT CLASSIFY THIS POTENTIAL-ALERT CONDITION APPROPRIATELY DUE TO A LACK OF UNDERSTANDING OF THE EXTENT OF ANNUNCIATOR INOPERABILITY.

SAFETY SIGNIFICANCE THE PLANT OPERATORS WERE UNAWARE OF THE EXTENT 0F j

INOPERABILITY OF THE ANNUNCIATORS.

IN ADDITION, THE REQUIRED EMERGENCY-PROTECTIVE ACTIONS CANNOT.BE PROMPTLY IMPLEMENTED IF NRC NOTIFICATIONS AND DECLARATIONS OF EMERGENCY ACTION LEVELS (EAL) ARE NOT MADE.

DISCUSSION OCT 16, 1840 ONE POWER SUPPLY WAS LOST RESULTING IN A LOSS OF POWER TO APPR0XIMATELY 28% OF THE ANNUNCIATORS.

CONTACT:

E. BENNER, NRR/ DORS AIT:-

YES

REFERENCE:

10 CFR 50.72 #24453 AND SIGEVENT:

IRQ PN39257

CALLAWAY, UNIT 1 92-19 I

OCT 17, 0058 POWER SUPPLY REPLACED, ALL APPLICABLE ANNUNCIATORS CLEARED.

OCT 17, 0100 ALL FOUR POWER SUPPLIES SHORT OUT, REMOVING POWER TO THE ANNUNCIATOR FIELD-CONTACTS.

HALF 0F ANNUNCIATORS LIT SOLID, HALF-REMAINED DARK.

THE OPERATORS ASSU'iED THAT ONLY THE' LIT ANNUNCIATORS =WERE INOPERABLE.

IT IS CURRENTLY BELIEVED.THAT THE CAUSE OF THE SHORT WAS THE IMPROPER REMOVAL OF A-JUMPER INSTALLED FOR MAINTENANCE ON THE FAILED POWER SUPPLY.

1 OCT 17, 0?.56 FOUR FIELD POWER SUPPLY FUSES REPLACED AND ALL ANNUNCIATORS CLEARED, BUT UNKNOWN TO THE OPERATORS, SEVEN INDIVIDUAL LOGIC CABINET FUSES-WERE-STILL BLOWN WHICH.MADE-APPROXIMATELY ONE. THIRD OF THE ANNUNCIATORS IN0PERABLE.

OCT 17, 1700 ALL ANNUNCIATORS RESTORED SATISFACTORILY.

SIMILAR EVENTS THERE HAVE BEEN NUMEROUS INSTANCES OF LOSS OF ANNUNCIATORS L

AT OTHER PLANTS.

l l-.

CALLAWAY, UNIT 1 92-19 FOLLOWUP AN AIT WAS SENT TO THE SITE.

WEAKNESSES IDENTIFIED BY THE AIT ARE AS FOLLOWS:

FAILURE TO EVALUATE AND ASSESS THE EXTENT OF THE ANNUNCIATOR FAILURES LACK 0F KNOWLEDGE BY OPERATORS OF SYSTEM LOGIC AND FAILURE MODES OF ANNUNCIATORS LACK OF AN AGGRESSIVE AND QUESTIONING ATTITUDE BY OPERATIONS AND PLANT MANAGEMENT BREAKDOWN OF COMMUNICATIONS THE CALLAWAY SENIOR RESIDENT INSPECTOR IS CURRENTLY WORKING ON A GENERIC COMMUNICATION.

a

)

r ATTACHMENT 3-i

' REACTOR SCRAM

SUMMARY

WEEK ENDING 11/08/92 1.

PLANT SPECIFIC DATA (1)

DATE SITE UNIT POWER SIGNAL CAUSE COMPLI.(3) YTD YTD.

YTD-CATIONS ABOVE CELOW 1 DIAL 15%

15%

11/04/92 NINE MILE POINT 2

100 A

EQUIPMENT NO 2

0-2 11/05/92 HILLSTCNE 3

16 A

EQUIPMENT NO

-2 0

2 1

i REACTOR SCRAM

SUMMARY

WEEK ENDING 11/15/92 1.

PLANT SPECIFIC' DATA (1)

-DATE SITE UNIT POWER SIGNAL CAUSE COMPLI. (3) ' YTD YTD'

YTD CATIONS AB0VE BELOW TOTAL 15%

15%

11/10/92 WOLF CREEK 1

100 A

PERSONNEL NO

'3 0

3-11/12/92:

SUSQUEHANNA -1 100 A

EQUIPMENT N0 l'

0 1-

11/13/92 DUANE ARNOLD 1 100 A

EQUIPMENT NO 2-0 2

11/13/92 PALO VERDE 2

100 A

PERSONNEL

.N0 4

0

'4

-12/14/92 BRAIDWOOD 2

100 A

EQUIPMENT NO 5

1 6

l L

l l

l

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.8 II. COMPARISON OF WEEKLY STA11STICS WITH INDUSTRY AVERAGES SCRAMS FOR WEEK ENDING 11/08/92 NUMBER 1992 1991 1990 1989 1988 0F WEEKli UEEKLY WEEKLY WEEKLY WEEKLY SCRAM CAUSE SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE POWER GREATER THAN 15%

EQUIPMENT RELATED 2

2.6 2.9 3.4 3.1 3.0 PERSONNEL RELATED (2) 0 0.7 0.6 0.5 1.0 1.0 OTHER (4) 0 0.0 0.0 0.0 0.1 0.4 Subtotal 2

3.3 3.5 3.9 4.2 4.4' POWER LESS THAN 15%

l EQUIPMENT RELATED 0

0.5 0.3 0.4 0.3 0.6 PERSONNEL RELATED (2) 0 0.3 0.2 0.1 0.3 0.4 OTHER (4) 0 0.0 0.0 0.0 0.0 0.2 Subtotal 0

0.8 0.5 0.5 0.6 1.2-TOTAL 2

4.1 4.0 4.4 4.8 5.6 MANUAL VS AUTO SCRAMS 1992 1991 1990 1989 1988 N0. OF WEEKLY WEEKLY WEEKLY WEEKLY WEEKLY TYPE SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE (YTD)

MANUAL SCRAMS 0

1.0 0.7 1.2

-0.9 1.1 AUTOMATIC SCRAMS 2

3.1 3.3 3.2 3.9 4.5 1

O' 4

11.

COMPARISON OF WEEKLY STATISTICS WITH INDUSTRY AVErtAGES SCRAMS FOR WEEK ENDING 11/15/92 NUMBER 1992 1991 1990 1989 1988 0F WEEKLY WEEKLY WEEKLY WEEKLY WEEKLY SCRAM CAUSE SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE (YTD)

-POWER GREATER THAN 15%

EQUIPMENT RELATED 3

2.6 2.9 3.4 3.1 3.0 PERSONNEL RELATED (2) 2 0.8 0.6 0.5 1.0 1.0 OTHER (4) 0 0.0 0.0 0.1 0.4

^

Subtotal 5

3.4 3.5 3.9 4.2 4.4 POWER LESS THAN 15%

EQUIPMENT RELATED 0

0.5 0.3 0.4 0.3 0.6 PERSONNEL RELATED (2) 0 0.3 0.2 0.1 0.3 0.4 OTHER (4) 0 0.0 0.0 0.0 0.0 0.2 Subtotal 0

0.8 0.5 0.5 0.6 1.1

. TOTAL 5

4.2 4.0 4.4 4.8 5.6 l

MANUAL VS AUTO SCRAMS l

1992 1991 1990 1989 1988 N0. OF WEEKLY WEEKLY WEEKLY WEEKLY WEEKLY t

TYPE SCRAMS AVERAGE AVERAGE AVERAGE AVERAGE AVERAGE l

l (YTD) l MANUAL SCRAMS 0

1.0 0.7 1.2 0.9 1.1 AUTOMATIC SCRAMS 5

3.2 3.3 3.2 3.9 4.5 l

1 I

(L0llE 1.

PLANT SPECIFIC DATA BASED ON INITIAL REVIEW OF 50.72 REPORTS FOR THE WEEK OF INTEREST.

PERIOD IS HIDNIGHT SUNDAY THROUGH MIDNIGHT SUNDAY. SCRAMS ARE DEFINED AS REACTOR PROTECTIVE ACTUATIMS WHICH RESULT IN ROC MOTION, AND EXCLUDE PLANNED TESTS OR SCRAMS AS PART OF ' PLANNED SHUIDOWN IN ACCORDANCE WITH A PLANT PROCEDURE.

THERl ARE 111 REACTORS HOLDING AN OPERATING LICENSE.

2.

PERSONNEL RELATED PROBLEMS INCLUDE HUMAN ERROR, PROCEDURAL DEFICIENCILS, AND MANUAL STEAM GENERATOR LEVEL CONTROL PROBLEMS.

3.

COMPLICATIONS: RECOVERY COMPLICATED BY EQUIPMENT FAILURES OR PERSONNEL ERRORS UNRELATED TO CAUSE OF SCRAM.

4.

• 0THER" INCLUDES AUTOMATIC 5 CRAMS ATTRIBUTED TO ENVIRONMENTAL CAUSES (LIGHTNING), dYSTEM DESIGN, OR UNKNOWN CAUSE.

OEAB SCRAh DATA Manual and Automatic Scrams for 1987 ------------------ 435 Hanual and Automatic Scrams for 1988 ------------------ 291 Manual and Automatic Scrams for 1989 ------------------ 252 Manual and Automatic Scrams for 1990 ------------------ 226 Manual and Automatic Scrams for 1991 ------------------ 206 Manual and Automatic Strams for 1992 --(YTD 11/15/92)-

190

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