ML18096B182

Summary of Operating Reactor Events Briefing on 921216. List of Attendees & Reactor Scram Statistics Encl

ML18096B182
Person / Time
Site:	Salem
Issue date:	12/23/1992
From:	Chaffee A Office of Nuclear Reactor Regulation
To:	Grimes B Office of Nuclear Reactor Regulation
References
OREM-92-021, OREM-92-21, NUDOCS 9301040148
Download: ML18096B182 (10)

Text

{{#Wiki_filter:.. ) DEC 2 3 1992 ~ c;27d=. J 'MF,:MORANDUM FOR: FROM:

SUBJECT:

Brian K. Grimes, Director Division of Operating Reactor Support

• Alfred E. Chaffee, Chief Events Assessment Branch Division of Operating Reactor _Support OPERATING REACTORS EVENTS BRIEFING DECEMBER 16, 1992 -

BRIEFING 92-21 So-31/ On December 16, 1992, we conducted an Operating Reactors Events Briefing (92-21) to inform senior managers from off ices of the Commission, AEOD, ACRS, NRR, and regional offices of selected events that occurred since our last briefing on December 9, 1992. lists the attendees. presents the significant elements of the discussed event. contains react9r scram statistics for the week ending 12/13/92. No significant events were identified for*input: into the NRC per.f ormance indic~tor program. Attachments: As stated cc w/attachments: See next page \\~ ~ray:kag 12/\\--\\/92 OFFICIAL RECORD COPY DOCUMENT NAME: ORTRANS.KAG Original signed by Robert L. Dennig for Alfred E. Chaffee, Chief Events Assessment Branch Division of Operating Reactor Support DISTRIBUTION: ( C~!'i~-*"-~1_ -~i!~-~7 PDR EAB R/F KG ray TKoshy LKilgore, SECY <) EAB/DORS EGoodwin 12 IJ;J.!. 9 2 (G:KAG) di?~~ ACbaff ee 12/))/92 M

t I cc: T. Murley, NRR (12G18) F. Miraglia, NRR (12G18) F. Gillespie, NRR (12Gl8) 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 {12Gl8) J. Richardson, NRR (7026) A. Thadani, NRR {8E2)

s. Rosenberg, NRR (10E4)

C. Rossi, NRR {9A2) B. B~ger, NRR (10H3) F. Congel, NRR (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 (2G5) E. Beckjord, RES (NLS-007) A. Bates, SECY (16G15) G. Rammling, OCM (16Gl5) 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 bee: INPO ATTN:

S. Newton 1100 Circle 75, suite 1500 Atlanta, GA 30339 J. Stone, (PDI-2) C. Miller, (PDI-2)

• i i

OPERATING NAME B. GRIMES A. CHAFFEE E. GOODWIN R. DENNIG T. KOSHY K. GRAY

c. ROSSI P. ENG R. DEPRIEST E. MARINOS E. FOX

s. ROSENBERG Regions Region I Region III Region IV Region V AIT Team Leaders

w. Ruland ATTACHMENT 1 LIST OF ATTENDEES REACTORS EVENTS FULL BRIEFING DECEMBER 16, 1992 OFFICE NAME NRR

c. ORSINI NRR J. STONE NRR

c. MILLER NRR M. DAVIS NRR

v. BEASTON NRR

s. VARGA NRR J. CALVO NRR D. COE NRR T. SHEDLOSKY NRR R. SUMMERS NRR

v. BEN ARO YA NRR TELEPHONE ATTENDANCE (AT ROLL CALL}

(92-21} OFFICE NRR NRR NRR NRR NRR NRR NRR. ACRS OCM/IS OCM/GDP AEOD Resident Inspectors Misc.

SALEM 2 OPERATING REACTORS EVENTS BRIEFING 92-21 EVENTS ASSESSMENT BRANCH LOCATION: 10 Bll, WHITE FLINT WEDNESDAY, DECEMBER 16, 1992, 11:00 A.M. ATTACHMENT 2 UNREPORTED FAILURE OF CONTROL ROOM ANNUNCIATORS CAIT>

PROBLEM SALEM, UNIT 2 UNREPORTED FAILURE OF CONTROL ROOM ANNUNCIATORS DECEMBER 13, 1992 92-21 PLANT OVERHEAD ALARMS WERE FROZEN FOR APPROXIMATELY ONE AND A HALF HOURS. POTENTIAL ALERT CONDITION REMAINED UNREPORTED FOR ALMOST 24 HOURS. CAUSE UNDER EVALUATION. SAFETY SIGNIFICANCE EARLY INDICATIONS OF PLANT ABNORMALITIES COULD REMAIN UNDETECTED. EMERGENCY PROTECTIVE ACTIONS CIF REQUIRED) CANNOT BE PROMPTLY IMPLEMENTED IF REPORTING.REQUIREMENTS ARE NOT MET. DISCUSSION ON DEC. 13 AT 9:26 P.M., OPERATORS HEARD ALARM TYPEWRITER PRINTING AN ALARM STATUS CHANGE, BUT "ALARM PRINTER PRINTING" ANNUNCIATOR DID NOT LIGHT UP. CONTACTS: . T. KOSHY, NRR/DORS W. RULAND, RI/DRS

REFERENCES:

10 CFR 50.72 #24752 AND PN19275 AIT: YES SIGEVENT: TBD -1

SALEM,* UNIT 2 92-21 OPERATORS OBSERVED THE CLOCK DISPLAY ON THE ANNUNCIATOR COMPUTER SCREEN REMAINING AT 7:45 P.M. THE ANNUNCIATOR SYSTEM COULD HAVE BEEN INOPERABLE FOR APPROX. 1 1/2 HRS.

• THE ANNUNCIATOR COMPUTER IS EQUIPPED WITH A BACKUP SYSTEM WHICH CONTINUED TO LOG DATA BUT DID NOT PROVIDE THE BACKUP FUNCTION OF LIGHTING THE ANNUNCIATORS.

THERE WERE NO INDICATIONS OF THIS FAILURE IN THE FRONT PANELS. <HORSE SHOE AREA).

• THE OPERATORS REBOOTED THE COMPUTER THAT DRIVES THE ANNUNCIATORS AND CORRECTED THE PROBLEM.
• THIS COMPUTER FOR THE ANNUNCIATOR WAS INSTALLED DURING THE LAST OUTAGE (SPRING 1992).

MANUFACTURER IS BETA CORPORATION. THE PRIMARY CPU FOR THE COMPUTER FAILED AUTOMATIC SELF TEST AT 8:00 P.M. AND 9:00 P.M., BUT FAILED TO SHIFT TO THE BACKUP CPU.

• THE LICENSEE EXAMINED PLANT COMPUTER DATA AND CONCLUDED THAT SOME MINOR ALARM CONDITIONS DID INITIATE BETWEEN 7:45 P.M. AND 9:26 P.M.

ALARM TYPEWRITER REMAINED OPERABLE WHILE OVERHEAD ANNUNCIATORS WERE LOST.

• THE LICENSEE DID NOT DECLARE AN ALERT PROMPTLY AS THEY CONCLUDED THAT THE PROBLEM DID NOT CONTINUE TO EXIST FOR 15 MIN. AFTER RECOGNITION.
• A 50.. 72 REPORT WAS MADE AT 5:04 P.M. ON DEC. 14.

SALEM; UNIT 2 LICENSEE COMPENSATORY ACTIONS THE FOLLOWING SURVEILLANCE IS DONE EVERY 15 MIN: MANUAL LOGIC CHECK OF CPU BY OPERATOR INSERT DUMMY ALARM AND CHECK ANNUNCIATORS CHECK CLOCK ON THE CRT SIMILAR EVENTS 92-21 CALLAWAY ON OCTOBER 17, 1992, AND SEVERAL OTHER LOSSES OF ALL ANNUNCIATORS. FOLLOWUP KEWAUNEE HAS A SIMILAR ANNUNCIATOR COMPUTER. THE PROJECT MANAGER WAS NOTIFIED. REGION 1 HAS ACTIVATED AN AIT INSPECTION. EAB WILL ASSESS GENERIC IMPLICATIONS.

ATTACHMENT 3 REACTOR SCRAM

SUMMARY

WEEK ENDING 12/13/92

1.

PLANT SPECIFIC DATA<1> DATE SITE UNIT POWER SIGNAL CAUSE COMPLI-<3> YTD YTD YTD CATIONS ABOVE . BELOW TOTAL 15% 15% 12/08/92 PALO VERDE 1 100 A EQUIPMENT NO 2 0 2 12/13/92 FARLEY I 100 A EQUIPMENT NO l 0 l 12/13/92 SEABROOK I 100 M EQUIPMENT NO 2 1 3 12/13/92 PILGRIM 1 50 A EQUIPMENT NO 1 0 l

II. COMPARISON OF WEEKLY STATISTICS WITH INDUSTRY AVERAGES SCRAM CAUSE POWER GREATER THAN 15% EQUIPMENT RELATED PERSONNEL RELATED (2) OTHER (4) Subtotal POWER LESS THAN 15% EQUIPMENT RELATED. PERSONNEL RELATED (2) OTHER (4) Subtotal TOTAL TYPE MANUAL SCRAMS AUTOMATIC SCRAMS SCRAMS FOR WEEK ENDING 12/13/92

• NUMBER 1992 1991 OF WEEKLY WEEKLY SCRAMS AVERAGE AVERAGE (YTD) 4 2.6 2.9 0

0.8 0.6 0 0.0 0.0 4 3~4 3.5 0 0.5 0.3 0 0.2 0.2 0 0.0 0.0 0 0.7 0.5 4 4.1 4.0 MANUAL VS AUTO SCRAMS 1992 1991 NO. OF WEEKLY WEEKLY SCRAMS AVERAGE AVERAGE (YTD) I 1.0 0.7 3 3.1 3.3 1990 1989 WEEKLY WEEKLY AVERAGE AVERAGE 3.4 3.1 0.5 1.0 0.0 0.1 3.9 4.2 0.4 0.3 0.1 0.3 0.0 0.0 0.5 0.6 4.4 4.8 1990 1989 WEEKLY WEEKLY AVERAGE AVERAGE 1.2 0.9 3.2 3.9 1988 WEEKLY AVERAGE 3.0 1.0 0.4 4.4 0.6 0.4 0.2 1.2 5.6 1988 WEEKLY AVERAGE 1.1 4.5

NOTES

1.

PLANT SPECIFIC DATA BASED ON INITIAL REVIEW OF 50.72 REPORTS FOR THE WEEK OF INTEREST. PERIOD IS MIDNIGHT SUNDAY THROUGH MIDNIGHT SUNDAY. SCRAMS ARE DEFINED AS REACTOR PROTECTIVE ACTUATIONS WHICH RESULT IN ROD MOTION, AND EXCLUDE PLANNED TESTS OR SCRAMS AS PART OF PLANNED SHUTDOWN IN ACCORDANCE WITH A PLANT PROCEDURE. THERE ARE 111 REACTORS HOLDING AN OPERATING LICENSE.

2.

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

3.

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

4.

"OTHER" INCLUDES AUTOMATIC SCRAMS ATTRIBUTED TO ENVIRONMENTAL CAUSES {LIGHTNING), SYSTEM DESIGN, OR UNKNOWN CAUSE. OEAB SCRAM DATA Manual and Automatic Scrams for 1987 ------------------ 435 Manual 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 Scrams for 1992 --{YTD 12/13/92)-- 205 .}}