ML20198R823

Forwards Legible Transparencies Originally Provided by Telecopy on 860604 Re Commission Briefing on Facility Restart.Transparencies Will Be Provided for 860609 Presentation to EDO

ML20198R823
Person / Time
Site:	San Onofre
Issue date:	06/05/1986
From:	Kirsch D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
To:	Baskin K SOUTHERN CALIFORNIA EDISON CO.
References
NUDOCS 8606100227
Download: ML20198R823 (15)

Text

.

e O ttn #'o UNITED STATES

! ,t g NUCLEAR REGULATORY COMMISSION g a REGION V

1. s ,4 1450 MARIA LANE, SUITE 210 '

%, ,d, WALNUT CREEK, CALIFORNIA 94596 June 5, 1986 Southern California Edison Company P.O. Box 800 2244 Walnut Grove Avenue Rosemead, California 91770 Attn: Mr. Kenneth P. Baskin. Vice President Nuclear Engineering, Safety and Licensing Department Dear Mr. Baskin; Enclosed is a more legible copy of the transparencies which were provided to you by telecopy on June 4, 1986. We understand that you will provide the transparencies for your presentation to the ED0's office by June 9, 1986.

- I _

Dennis F. Kirsch, Director Division of Reactor Safety and Projects

Enclosure:

As stated cc: DCS/PDR 50-206 Docket File 8606100227 860605 PDR ADOCK 05000206 P PDR l }

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COMMISSION BRIEFING ON SONGS 1 RESTART A. INTRODUCTION (REGION V)

CHRONOLOGY OF EVENT FOLLOWUP '

• /

B. I&E HEADQUARTERS EFFORTS (I&E)

EVALUATION OF CHECK VALVE ADEQUACY C. NRR EFFORTS (NRR)

EVALUATION OF OVERALL PLANT DESIGN ADEQUACY D. REGION V EFFORTS (REGION V)

INSPECTION OF PLANT DESIGN CHANGES INSPECTION OF PROGRAM CHANGES E. STAFF

SUMMARY

AND CONCLUSIONS (REGION V)

ENCLOSURE 1 PAGE 1 0F ll4

SONGS 1 CHRONOLOGY NOVEMBER 85 11/21 - WATER HAMMER EVENT 11/23 - IIT ONSITE JANUARY 86

• 1/20 - IIT REPORT PUBLISHED 1/22 - IIT BRIEFING OF COMMISSION 1/31 - MEETING WITH SCE TO REVIE SCE INVESTIGATION FEBRUARY 86 1

2/19 - MEETING WITH SCE TO REVIEW SCE CORRECTIVE ACTIONS MARCH 86 -

3/6 - STAFF ACTION PLANS DEVELOPED AND PROVIDED TO EDO 3/5 & 3/12 - MEETINGS WITH SCE TO DISCUSS CORRECTIVE ACTIONS 3/18 - LICENSEE BRIEFING OF COMMISSION APRIL 86 4/8 - SCE RESTART REPORT SUBMITTED TO STAFF MAY 86

, 5/22 - ENFORCEMENT CONFERENCE WITH SCE JUNE 86

' 6/12 - COMMISSION MEETING JULY 86 -

ENCLOSURE 1

^

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7/23 - STAFF TO MEET WITH ACRS ,

1 1

IE ACTIONS INSPECTIONS

- SONGS-1

- MCC PACIFIC

- ATWOOD MORRILL

- UTAH TEST FACILITY

- OTHER CHECK VALVE VENDORS

- OTHER NUCLEAR POWER PLANTS MEETINGS WITH LICENSEE

- FEBRUARY 19, 1986

- MARCH 5, 1986

- MARCH 19, 1986 REVIEWED LICENSEE SUBMITTALS DATED

- MARCH 2, 1986

- APRIL 8, 1986

- MAY l, 1986

- MAY 5, 1986 i

e ENCLOSURE 1 PAGE 3 OF 14

RESULTS OF IE REVIEW

l. ROOT CAUSE ANALYSIS LICENSEE'S SUBMITTAL PROPERLY ATTRIBUTES FAILURES TO

- IMPROPER SIZING

- IMPROPER LOCATION

- IMPROPER DESIGN APPLICATION

2. ADEQUACY OF CHECK VALVE DESIGN POOR CHOICE FOR THIS APPLICATION

- HIGH FLOW-LOW DP

- FLUTTER / WOBBLE

- MARGINAL FLOW RATES

- TURBULENCE

3. CORRECTIVE ACTION REPLACE FEEDWATER CHECK VALVE WITH VALES OF

- PROPER SIZE

- PROPER DESIGN MOVE IMPROPERLY PLACED VALVES

• PERFORM FULL SCALE TESTING

• REVIEW FAILURE DATA

• LDOK AT ALL OTHER CHECK VALVES ,

ENCLOSURE 1 PAGE 4 0F 14

4 RESULTS OF IE REVIEW

4. IST PROGRAM

• REVIEWED AND FOUND ACCEPTABLE

• ENCHANCEMENTS

's

- MONITOR FEEDWATER VALVES

- OPEN & INSPECT

- QUANTITATIVE LEAK RATE CRITERIA

- FULL SCALE TESTING

5. ADEQUACY OF CHECK VALVES IN OTHER SYSTEMS DISASSEMBLE ALL MCC-PACIFIC CHECK VALVES (29)

DISASSEMBLE ANY WITH PREVIOUS PROBLEMS (5)

• DISASSEMBLE ANY WITH MARGINAL SIZING, LOCATION, OR DESIGN APPLICATION (15) l l

ENCLOSURE 1 PAGE 5 0F 14 l

NRR REVIEW OF 15 ISSUES RELATED TO THE NOVEMBER 21, 1985 EVENT CATEGORIES:

o STATION BLACKOUT o PLANT SYSTEMS o POST-TRIP DATA RETREIVAL o COMPONENT INTEGRITY ENCLOSURE 1 PAGE 6 0F 14 i i

STATION BLACKOUT o EXISTING OFFSITE POWER SOURCES (GDC-17)

MODIFICATIONS BEING MADE TO ENHANCE RESTORATION OF DELAYED SOURCE COMMITMENT TO IMPLEMENT A MODIFICATION TO ENHANCE AVAILABILITY OF SECOND OFFSITE SOURCE ALL 4 KV POWER SUPPLY CABLES TESTED AND REPLACED o MANUAL LOADING OF DIESELS (GDC-17)

SYSTEMS REVIEW SHOWS 29 MIN. TO LOAD IS LIMITING CASE AUTO-LOADING WOULD NOT HAVE ALTERED THE EVENT ENCLOSURE 1 PAGE 7 OF ll4

a PLANT SYSTEMS o MAIN STEAM LINE DESIGN CONTAINMENT RESPONSE PRIMARY SYSTEM COOLDOWN is OFFSITE DOSE CONSIDERATIONS AFW SYSTEM RELIABILITY o STEAM GENERATOR BLOWDOWN CONTROL 1

AUTO-ISOLATION PRECLUDE REOPENING UPON RESET VALVE POSITION INDICATION 1

4 ENCLOSURE 1 PAGE 8 OF ll4

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POST-TRIP DATA RETREIVAL i.

o RELIABILITY OF POWER TO VITAL BUSES

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o MODIFICATION TO POST-TRIP DATA RETRIEVAL EQUIPMENT i

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1.

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t r ENCLOSURE 1 PAGE 9 0F 14

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COMPONENT INTEGRITY i

a d

o FEEDWATER REPAIR AND NDE MEET ASME CODE 4

l o LOW LEVELS DID NOT DAMAGE STEAM GENERATORS o LOOSE PARTS IN STEAM GENERATOR FEEDRINGS i

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l 1

i l ENCLOSURE 1 PAGE 10 0F 14

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NON-IIT REVIEW ITEMS a

i j o UPGRADE SEISMIC DESIGN TO 0.67g i

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i o FIRE PROTECTION MODIFICATIONS (APPENDIX R) l o TDI DIESELS

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i ENCLOSURE 1 l PAGE 11 0F 14 c

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~

IIT RELATED INSPECTION EFFORTS REGION V EFFORTS STATUS o MATERIAL CONDITION REVIEW PROGRAM

• IN PROGRESS o DESIGN CHANGES / MODIFICATIONS

• IN PROGRESS FEEDWATER SYSTEM ONSITE POWER RELIABILITY STEAM GENERATOR BLOWDOWN o ABNORMAL CONDITION RESPONSE COMPLETE POST TRIP REVIEW ENHANCE EVALUATION PROCESSES o EMERGENCY NOTIFICATION COMPLETE o PROCEDURE IMPROVEMENTS

• IN PROGRESS o LESSONS LEARNED TRAINING

• IN PROGRESS

• SCHEDULED TO BE COMPLETE PRIOR TO PLANT STARTUP ENCLOSURE 1 PAGE 12 OF 114

NON-IIT RELATED INSPECTION EFFORTS REGION V EFFORT STATUS o APPENDIX R (SAFE SHUTDOWN) *IN PROGRESS 3RD AFW PUMP APPENDIX R DIESEL

• /

o ENVIRONMENTAL QUALIFICATION UPGRADE

• IN PROGRESS 45 ELECTRICAL PENETRATIONS REPLACE AFW PUMP MOTOR VALVE OPERATORS o SEISMIC UPGRADES COMPLETE 300 PIPE SUPPORTS (0.5 to 0.67g)

CABLE TRAY SUPPORTS PIPING o TDI DIESELS COMPLETE OWNER GROUP ACTIONS o TMI ITEMS

• IN PROGRESS PASS o CONTROL ROOM VENTILATION

• IN PROGRESS

• SCHEDULED TO BE COMPLETED PRIOR TO PLANT STARTUP ENCLOSURE 1 PAGE 13 0F ll4

o

SUMMARY

AND CONCLUSIONS o READINESS FOR RESTART o

EVALUATIONS AND INSPECTIONS ARE SUBSTANTIALLY COMPLETE LICENSEE IMPLEMENTATION OF ENHANCEMENTS AND REQUIREMENTS ARE SCHEDULED TO SUPPORT RESTART STAFF INSPECTION OF IN PROGRESS ITEMS CONTINUES

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ENCLOSURE 1 PAGE 14 OF 14

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