ML20127D157
| ML20127D157 | |
| Person / Time | |
|---|---|
| Site: | Hatch, Calvert Cliffs, Mcguire, Sequoyah, Pilgrim, Summer, Turkey Point, FitzPatrick, 05000000 |
| Issue date: | 06/13/1985 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Thompson H Office of Nuclear Reactor Regulation |
| References | |
| TAC-59545, NUDOCS 8506240138 | |
| Download: ML20127D157 (25) | |
Text
_
JUN 131985 O
MEMORANDUM FOR:
Hugh L. Thompson, Jr., Director Division of Licensing FROM:
Dennis M. Crutchfield, Assistant Director for Safety Assessment, DL
SUBJECT:
SUMMARY
OF THE OPERATING REACTORS EVENTS MEETING ON MAY 30, 1985 On May 30, 1985, an Operating Reactor Events meeting was held to brief the Office Director, the Division Directors and their representatives on events which occurred since our last meeting on May 15, 1985. The list of attendees is included as Enclosure 1.
The events discussed and the significant elements of these events are presented in Enclosure 2.
In addition, the assignment of follow-up review responsibility was discussed. The assignments made during this meeting and the status of previous assignments are presented in Enclosure 3.
Completion dates have been assigned for items in Enclosure 3.
Each assignee should review Enclosure 3 with regard to their respective responsibilities and advise ORAB if the target completion date cannot be met.
If an assignee has any questions, please contact D. Tarnoff, x29526.
Dennis M. Crutchfield, Assistant Director for Safety Assessment, DL
Enclosures:
DISTRIBUTION As Stated fGentralgiles3 NRC PDR ORAB Rdg cc w/ encl:
ORAB Members See next page l'
k AD/SA:D C:0RAB:DL @ 6 G ORA SL:
DL DCrutchfie d GHolahan DT ff:dm RWessman
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t JUN 1 3 198E MEMORANDUM FOR:
Hugh L. Thompson, Jr., Director Division of Licensing FROM:
Dennis M. Crutchfield, Assistant Director for Safety Assessment, DL
SUBJECT:
SUMMARY
OF THE OPERATING REACTORS EVENTS MEETING ON MAY 30, 1985 On May 30, 1985, an Operating Reactor Events meeting was held to brief the Office Director, the Division Directors and their representatives on events which occurred since our last meeting on May 15, 1985. The list of attendees is included as Enclosure 1.
The events discussed and the significant elements of these events are presented in Enclosure 2.
In addition, the assignment of follow-up review responsibility was discussed. The assignments made during this meeting and the status of previous assignments are presented in Enclosure 3.
Completion dates have been assigned for items in Enclosure 3.
Each assignee should review Enclosure 3 with regard to their respective responsibilities and advise ORAB if the target completion date cannot be met.
If an assignee has any questions, please contact D. Tarnoff, x29526.
M Dennis M. Crutchfield, Assistant Director for Safety Assessment, DL
Enclosures:
DISTRIBUTION As Stated Central Files NRC PDR ORAB Rdg cc w/ encl:
ORAB Members See next page s
Tl
'Y\\
ORA SL:
- DL C:0RAB:DL AD/SA:D e
fy{}6/l3/85 DT ff:dm RWessman GHolahan DCrutchfie d 4/
85 fi/ /85 g/so/85 I
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Hugh L. Thompson, Jr..
cc:
H. Denton G. Lainas R. Bernero P. Baranowski, RES J. Knight E. Rossi, IE T. Speis R. Hernan C. Heltemes F. Schroeder T. Novak G. Knighton W. Russell D. Silver J. Taylor J. Lyons E. Jordan D. Brinkman F. Rowsome E. Weiss W. Minners R. Baer L. Shao E. Adensam T. Ippolito D. Jaffe S. Varga H. Abelson J. Zwolinski I. Villalva E. Sullivan J. B. Hopkins D. Beckham J. T. Beard G. Edison J. Stolz K. Seyfrit D. Vassallo T. Murley, R-I G. Rivenbark J. Nelson Grace, R-II S. Varga J. Kepper, R-III D. Hood R. D. Martin, R-IV C. Stahl J. B. Martin, R-V P. Leech R. Starostecki, R-I R. Walker, R-II C. Norelius, R-III R. Denise, R-IV D. Kirsch, R-V T
\\
ENCLOSURE 1 LIST OF ATTENDEES OPERATING REACTORS EVENTS BRIEFING MAY 30, 1985 M. Caruso, NRR/0RAB G. Lanik, IE/EAB P. Gill, PSB/ DST W. Jones, IE/EAB J. Lyons, DL R. Singh, IE/EAB W. Swenson, NRR/0RAB A. Mou11on, IE/EAB F. Miraglia, DL R. Hernan, PPAS B. Wright, DE H. Bailey, IE E. Leeds, AE0D R. Freeman, AE0D F. Manning, DRA0 E. Weiss, IE/DEPER J. T. Beard, ORAB D. Crutchfield, NRR/DL D. Hood, LB4 E. Merschoff, IE P. Leech, ORB 2 B. Boger, DHFS K. Seyfrit, AEOD J. P. Knight, NRR/DE R. Bernero, NRR/DSI I. Villalva, IE/EAB J. D. Rubin, AE0D E. Rossi, IE G. Holahan, ORAB W. Minners, DST 1
3 OPERATING REACTORS EVENTS BRIEFING MAY 30, 1985 HATCH UNIT 1
STUCK OPEN SAFETY RELIEF VALVE SUMMER CRITICAL R0D POSITION ANOMALY FITZPATRICK SHUTDOWN MARGIN TESTS MCGUIRE UNIT 2 CRITICAL POSITION ANOMALIES TURKEY POINT UNITS 3/4 LOSS OF 0FFSITE POWER CALVERT CLIFFS UNITS 1/2 ALL EMERGENCY DIESEL GENERATORS INOPERABLE SEQUOYAH UNIT 2 IMPROPER USE OF TEST EQUIPMENT AND REACTOR TRIP PILGRIM WATERHAMMER IN HPCI TURBINE EXHAUST LINE O
1 1
s HATCH UNIT 1 - STUCK OPEN SAFETY RELIEF VALVE OF MAY 15, 1985 (G, RIVENBARK)
A SYSTEMS INTERACTION EVENT UNIT 1 OPERATING AT FULL POWER CONTROL ROOM EMERGENCY VENTILATION SYSTEM CHARC0AL FILTER DELUGE VALVE ACTUATED WATER LEAKED THROUGH VENTILATION DUCTS INTO A HATCH UNIT 1 ANALOG TRANSMITTER TRIP SYSTEM (ATTS) INSTRUMENT PANEL CAUSING SRV TO OPEN r
REACTOR MANUALLY SCRAMMED FEEDWATER PUMP REC 0 VERS REACTOR WATER LEVEL
'^
SRV CLOSED - WITHOUT OPERATOR ACTION
.u CAUSE LOSS OF INSTRUMENT WATER SUPPLY CAUSING DELUGE VALVE TO OPEN TOGETHER WITH PLUGGED DRAINS NOT SURE HOW WATER CAUSED THE SRV TO OPEN ACTION REPLACED ATTS POWER SUPPLY, CLEANED PLUGGED DRAINS AND INSPECTED DRAINS IN REDUNDANT FILTER UNIT LICENSEE PROPOSES TO ADD CLEAN 0UT CHECK PROCEDURES FOR PLENUMS AND THEIR DRAINS ORAB WILL DEVELOP TIA TO COORDINATE:
IE NOTICE FURTHER INVESIIGAflVE EFFORTS GENERIC REVIEW
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SUMMER - PREMATURE CRITICALITIES FEBRUARY 28 AND MAY 11, 1985 UPDATE (J. T. BEARD')
FEBRUARY 28, 1985 - UNDETECTED CRITICALITY, 17 DPM STARTUP RATE ECP OFF DUE TO MODEL FOR XENON TRANSIENT BEHAVIOR OPERATOR NOT ALERT
~
MAY 11, 1985 - WENT CRITICAL ON C-BANK VS. D-BANK 850 PCM DISCREPANCY ECP METHODS OKAY INPUT DATA QUESTIONNABLE M INVESTIGATING REACTIVITY DISCREPANCY; FINAL RESULTS DUE MID-JUNE 1985 PRELIMINARY RESULTS:
ERRORS IN SEVERAL INPUTS POWER DEFECT - 150 PCM PU BUILDUP
- 200 PCM FLUX RE-DISTRIBUTION - 380 PCM SIMILAR EVENTS HAVE OCCURRED AT E PLANTS e
t
FITZPATRICK - SHUTDOWN MARGIN TESTS UPDATE MAY 3 AND 6, 1985, (J. T. BEARD)
MAY 3, 1985 - TWO-ROD SDM TEST:
ADJACENT ROD PULLED TO DESIGN VALUE OF MARGIN, PULLING HIGHEST WORTH ROD; TEST STOPPED WHEN COUNT RATE TRioLED.
~
MAY 6, 1985 - REPEAT TWO-ROD SDM TEST:
PULLED HIGlj[ST WORTH ROD TO NOTCH 38 (OF 48),
CRITICAL ON 100 SEC. PERIOD.
5 ROD BLOCKS AT 10 C/S, TEST STOPPED, w
.- i ISSUES:
DESIGN SDM (1,1% 6 K)
TECH. SPEC. (0,4% 6 K)
MAY 25, 1985 - IN-SEQUENCE CRITICAL TEST:
CRITICAL SLIGHTLY BEFORE DESIGN VALUE WITHIN CALCULATION UNCERTAINTIES SDM = 0.8% 6 K O
NOT UNUSUAL OCCURRENCE; GE HAS RECOMMENDED IN-SEQUENCE RATHER THAN TWO-ROD TEST SINCE 1970'S,
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i MCGUIRE 2 - CRITICAL POSITION ANOMALIES.
MAY 17, 1985 (J. T. BEARD)
FIRST RELOAD - 1/3 OPTIMIZED FUEL USED MCGUIRE 1 CYCLE 2 XENON VALUES.
MAY 17, 1985 (6:09 A.M.) - WENT CRITICAL DN C-BANK VS. D-BANK 1000 PCM (I.E., 1%
6 K) DISCREPANCY BELOW MINIMUM ROD INSERTION LIMITS MAY 17, 1985 (11:48 A.M.) - INCREASED BORON CONCENTRATION STILL 1000 PCM DISCREPANCY ABOVE ROD INSERTION LIMITS.
CONTINUED TO POWER.
MAY 20, 1985 LICENSEE EXPLANATION:
MAY 22, 1985 - 1000 PCM ERROR FOUND IN CHANGE OF XENON PEAK VALUE USED FOR UNIT 1 ERROR CARRIED OVER TO UNIT 2 INADEQUATE TECHNICAL REVIEWS REGION 11 FOLLOWING UP; APPEARS TO BE PLANT-SPECIFIC PROBLEM.
T 4
TURKEY POINT - WIDESPREAD OUTAGE LEADS TO LOSS OF 0FFSITE POWER - MAY 17, 1985 (I. VILLALVA, IE)
PLANT STATUS PPIOR TO EVENT:
UNIT 3 IN REFUELING MODE, UNIT 4 AT 100% POWER.
CAUSE:
FIRE DISABLES A 500KV TRANSMISSION LINE WHICH CAUSES THE LOSS OF ANDYTOWN SUBSTATION AND ITS 3-500KV LINES.
LOSS OF SUBSTATION CASCADES TO A WIDESPREAD INSTABILITY PROBLEM, INTERRUPTING POWER TO ABOUT 4.5 MILLION PERSONS SOUTH OF PALM BEACH TO MIAMI AND TO TURKEY POINT.
SEQUENCE OF EVENTS:
11:40:
TURKEY POINT UNIT 4 TRIPS ON DEGRADED VOLTAGE CONDITIONS; BOTH EMERGENCY D-G'S START AND PICKUP VITAL LOADS AFTERWHICH UNIT 4 IS BROUGHT TO A STABLE HOT SHUTDOWN MODE WITH NATURAL CIRCULATION COOLING.
11:45:
TURKEY POINT FOSSIL-FUEL UNITS 1 AND 2 TRIP ON SYSTEM INSTABILITY; THE FIVE CRANKING D-G'S ARE STARTED DURING WHICH TIME A FIRE DEVELOPS IN THE SWITCHGEAR OF ONE OF THE D-G'S (FIRE IS EXTINGUISHED IN @ FIVE MINUTES BY THE LOCAL C0-2 SYSTEM); EFFORTS INITIATED TO TRANSFER THESE UNITS FROM A GAS TO AN OIL BURNING MODE (THIS ACTION REQUIRED BECAUSE POWER TO THE GAS COMPRESSORS WHICH ARE LOCATED SEVERAL MIL,ES FROM TURKEY POINT WAS ALSO LOST).
- 13:47:
A FOSSIL FUEL UNIT IS PLACED ON LINE; SHORTLY THEREAFTER THE OTHER UNIT IS PLACED ON LIAE.
13:55:
0FFSITE POWER IS RESTORED TO UNIT 4; SHORTLY THEREAFTER, OFFSITE POWER'I-S RESTORED TO UNIT 3.
SAFETY SIGNIFICANCE:
EXCEPT FOR THE EFFECTS OF A FULL POWER TRIP, THE SAFETY SIGNIFICANCE OF THIS EVENT WAS MINIMUM BECAUSE ALL ESF SYSTEMS OPERATED AS DESIGNED.
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CALVERT CLIFFS 1/2 - ALL EMERGENCY DIESEL GENERATORS IN0PERABLE MAY 26, 1985 (D. JAFFE)
UNIT 1 IN REFUELING; UNIT 2 AT 100% POWER, EDG #11 GENERATOR FAILED DURING TEST RUN ON MAY 14, 1985; ROTOR STRAP (" STATIC DISSIPATOR") BROKE LOOSE, MAY 25, 1985, LAB RESULTS SHOWED FATIGUE CRACKING, MAY 26, 1985, RADIOGRAPH OF EDG #21 SHOWED SIMILAR CRACKS IN ROTOR STRAP.
ALL THREE EDGS DECLARED " INOPERABLE"; UNIT 2 STARTED SLCW RAMP DOWN, MAY 26, 1985, GENERATOR REPLACED ON EDG #11, ALIGNED TO UNIT 2.
ROTOR STRAPS REMOVED FOR EDG #12, 21; NOT NECESSARY.
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TMI-1, PEACH BOTTOM 2/3, VERMONT YANKEE, AND MILLSTONE 1 HAVE SIMILAR ROTOR STRAPS; ADVISED OF POTENTIAL PROBLEM, t
SEQUOYAH 2 - IMPROPER USE OF TEST EQUIPMENT AND REACTOR TRIP MAY 22, 1985 (E WEISS, IE)
REACTOR TRIPPED FROM 100% POWER ON OVERPOWER DELTA T DIGITAL VOLTMETER (DVM) USED TO MEASURE T AND T H0T COLD
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PNEVIOUS SIMILAR EVENTS (1985, 1983)
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PILGRIM - WATER HAMMER IN HPCI STEAM TURRINE EXHAUST LINE MAY 18, 1985 (P. LEECH)
PROBLEM - TWO SNUBBERS AND ONE SNUBBER SUPPORT ON STEAM EXHAUST LINE WERE DAMAGED DURING ROUTINE HPCI OPERABILITY TEST.
SAFETY SIGNIFICANCE - POTENTIAL LOSS OF HPCI IF EXHAUST PIPE BECOMES DAMAGED; LOSS OF CONTAINMENT INTEGRITY.
CAUSE OF DAMAGE - SUSPECTED WATER HAMMER IN EXHAUST LINE RESULTING FROM TURBINE TRIP AND SLOWDOWN FOLLOWED BY AUTOMATIC RESTART.
CORRECTIVE ACTIONS - LICENSEE HAS CHANGED HPCI START TIME FROM 25 SECONDS MAXIMUM TO 90 SECONDS MAXIMUM ON GE'S RECOMMENDATION AND WILL INITIATE FUTURE SURVEILLANCE TESTS OF HPCI MANUALLY.
CONSIDERATION IS BEING GIVEN TO INSTALLATION OF A VACUUM BREAKER BETWEEN THE CHECK VALVE AND TORUS PENETRATION.
I ANALYSIS PERFORMED BY LICENSEE INDICATES THAT SNUBBERS ARE NOT NEEDED TO PROTECT THE EXHAUST PIPE FROM THE WATER HAMMER.
GENERIC IMPLICATIONS - SIMILAR EVENTS HAVE OCCURRED AT OTHER BWRS; USI A-1 RESOLUTION SUGGESTS APPROPRIATE USE OF VACUUM BREAKERS TO CORRECT PROBLEM.
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REACTOR TRIPS 21' REACTOR TRIPS IN PAST TWO WEEKS (5/16'/85 - 5/29/85) 9 EQUIPMENT PROBLEM 9
PERSONNEL ACTIVITIES MANUAL 3
0 TEST
'0NLY INDICATES PLANTS WITH FULL POWER LICENSE e
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l ENCLOSURE 3 l
INCOMPLETE ITEMS To Be Meeting Responsible Task Completed Date Branch Description By:
Comment 8/7/84 DL/PM Determine if Velan (PORV) 5/31/85 In progress (Salem) block valve qualified to close against 7/25/84 steam blowdown transient at Salem 2.
Check EPRI Test Program results j
8/7/84 DL/0RAB Coordinate NRR review 5/31/85 In progress
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of Region I report on Susquehanna 2 Station Blackout; setup meeting to decide followup actions l
10/16/84 ORAB/IE Follow-up briefing 5/31/85 Complete l,
after cause of Palisades IE Info RCP failure and generic Notice 85.03 implications determined issued Jan. 28, 1985 l
1/3/85 DL/PM Find out about existence 5/31/85 Complete Susquehanna of widespread potential Licensee had maintenance problem or CRD inspected the air system contamination air system l
after the 12/21/84 event and concluded that there is is no potential maintenance problem or CRD air system contamination 1
~
To Be Meeting Responsible Task Completed Date Branch Description By:
Coment 1/3/85 DL/PM, Detennine if a change in 5/31/85 In progress ORAB Tech Specs should be considered in view of Susquehanna scram soleniod problem 1/3/85 DL Sumarize B&W licensing 5/31/85 In progress (P.Kadambi) responses to questions subsequent to Rancho Seco loss of NNI event and present at follow-up OR Events briefing 1/3/85 ICSB Consider need for 5/31/85 ICSB is F. Rosa additional requirements considering on alams/ annunciators Oconee 1 loss of annunciators (4/25/85) in analysis of requirements 1/3/85 IE Evaluate incident response 5/31/85 Evaluation criteria concerning loss complete of plant annunciators l
1/3/85 IE Prepare Infomation Notice 5/31/85 Complete regarding degradation of Information safety injection pumps due notice will to boron crystallization not be issued in view of SER issued by INP0 t
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To Be Meeting Responsible Task Completed Date Branch Description By:
Comment 1/17/85 IE/0RAB Continue review of 5/31/85 Complete Sequoyah and North Anna IE Information trip breaker failures Notice 85-18 for preparation of Information Notice and determination of need for additional action 5/07/85 DL/PM Follow-up briefing after 7/7/85 In progress A
Catawba 2 bvaluation of overpress.
effects on various systems and corrective actions.
~s 5/07/85 DL/PM Schedule meeting with R-II 7/7/85 Catawba 1/2 and DHFS (with licensee if x.
appropriate) to evaluate operator activities 5/07/85 ORB #1 Discuss with R-I the 7/7/85 management aspects of recent events at Salem 5/07/85 ORAB/DE Review SGOG letter on eddy 8/1/85 MTEB is current testing issue, in reviewing view of Millstone 2 EPRI May 13, findings 1985 letter and will address followup issue.
5/15/85 DL/0RAB Determine applicability to 5/31/85 Complete Ginna other plants and if Plant specific appropriate prepare problem; no IE draft IE Notice. Check Notice. TMI-1 TMI-1 for similar issue.
inspected; does not have problem.
To Be Meeting Responsible Task Completed Date Branch Description By:
Conment 5/15/85 DL/PM Follow-up results of 7/15/85 Completc CPB licensee shutdown margin May 30, 1985 Fitzpatrick tests and regional followup evaluation. Followup briefing.
briefing if appropriate.
May 30, 1985 memo from Rubenstein to Lainas 5/15/85 DL/PM Follow-up results of 7/15/85 Complete CPB regional evaluation of May 30, 1985 Summer premature criticality.
Followup Briefing 5/30/85 ORAB Will develop TIA to 7/30/85 In progress Hatch I coordinate IE Notice and further investigative efforts s
9 1
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