ML101390494

Event Review for Robinson - Slides

ML101390494
Person / Time
Site:	Robinson
Issue date:	05/12/2010
From:	Progress Energy Carolinas
To:	NRC/RGN-II
Shared Package
ML101390483	List: ML101390487 ML101390494 ML101390505
References
Download: ML101390494 (42)

Text

Robinson Nuclear Plant March 28, 2010 Event Review Nuclear Regulatory Commission May 12 12, 2010 Enclosure 2

Introduction Participants Purpose Eventt overview E i Event Review Team C

Corrective ti actions ti Lessons being shared with fleet/industry Summary 2

Enclosure 2

Event Overview Tom Natale Event Review Team Member Enclosure 2

Event Overview Event Initiated at 1852 Procedure flow E i Equipment t challenges h ll Operator response/actions Timeline Review 4

Enclosure 2

Event Overview 4KV S YSTEM LOADS KVAC*F1GURE* j 4 160 V BUS NO. I RL..~CTO R COOLAN T PUl\IP "A" 5211

!\lAIN FEED'VATER P lJ-:\lP "A " 52 /3 C IRClJ"LATl:'G ' VATER Pill lP "A " 5212 C O:'\"DE:-;SATE P lJ-:\ IP "A " 5216 HEATER DR~ Pill l P "A " 5215 STATION SERVICE TR~SFORl\IER 2B 52/4 B US 1 A ...'"D 2 TIE BREAKER 52110 4 160 V B US NO.2 RL..<\.CTO R COOL~T PUl\IP "C" 52114 STATION S ERVICE TR~ SFORl\ IER 2A and 2F 5 2113 4 160 ,. B US N O.3 STATION SER VICE TR<\.NSFORl\IER 2C a n d 2G 5 2115 4 160 V B US NO.4 REACTO R COOLA...N T P Ul\ IP "B " 52127

. lAIN FEED'VATER P lJ-:\lP "B " 52/ 26 C IRCULATl:'G ' VATER Pill IP "B " 52123 CO:'\"DE:-;SA TE P lJ-:\ IP "B " 5 2122 HEATER DR~ Pill I P "B " 5 2125 STATION SERVICE TR~ SFORl\IER 2D 52128 B US 3 A..'"D 4 TIE BREAKER 52119 4160 V B US 5 5212 4 4160 V B US NO.5 C IRCULATING ' VATER PU!\lP "C" 52133 STATION SERVICE TR~ SFORl\IER 2E 52/ 32 5 Propss Energy Enclosure 2

Event Overview TO 2-"2-oKV SWI T CiHrlf....R D 6

Enclosure 2

Event Overview 7

Enclosure 2

Event Review Team Bob Duncan Team Lead Enclosure 2

Event Review Event Response Team Makeup:

Bob Duncan ((VP NOD)) - Team Lead Mark Rigsby (Manager, Site Support CR3)

O Organizational i ti l Eff Effectiveness ti L Lead d

George Attarian (Manager, (Manager Major Projects)

Technical Engineering Lead 9

Enclosure 2

Event Review Duncan Management Sponsor Attarian Rigsby Support for Technical Eng. Lead Organizational Eff. Lead Event Team McCabe/Castell Riley - Electrical Natale - Work Licensing Support Management Georgeson -

Electrical/I&C Cole Curry - Operations Corp Support Communications H

Hooper - Electrical El t i l Pierce -Training Bardauskas Root Cause Team Lead Koschmeder - Brown - INPO Electrical/I&C Loanee Grubb - CAP Training/Operations Organizational Root McNamara - Cause Transmission/ Spellman -

System Operations Young Engineering Technical Team Sutter Assistance Ertman - Fire Operations Analysis 10 Enclosure 2

Event Review External Assistance Fire Forensics - Richard Hanson and Associates Fire Modeling - Hughes Associates Breakers/Switchgear - Homewood Products, Westinghouse, g , Areva Reactor Coolant Pump parameters -

Westinghouse, Areva C bl - EPRI Cables Investigation Methods 11 Enclosure 2

Investigation Results: Operations Monitoring of Critical Safety Functions Sub-criticality C

Core cooling li Heat sink RCS integrity RCS inventory Containment integrity 12 Enclosure 2

Investigation Results: Equipment Cable Modifications (1986)

Cable specifications Cable installation/support Breaker 52/24 Control C t l power ffuse Knowledge gap pertaining to control power circuit Evaluation of work order 13 Enclosure 2

Investigation Results: Equipment VCT - RWST AutoA t Swap S

Comparator jumper configuration Post-maintenance testing Instrument Bus 3 14 Enclosure 2

Investigation Results: Operations Command and Control/Communication Ch ll Challenges Safety injection anticipation RCS cooldown mitigation Procedure utilization (APPs, AOP closure)

Status briefs/crew updates MCR distraction management Alert declaration 15 Enclosure 2

Investigation Results: Operations Additional Insights Path 1 & foldout strategy AOP-041 Monitoring of Key Parameters RCP seall cooling li FCV-626 closure Volume control tank level Charging pump suction swap-over RCS temperature and pressure 16 Enclosure 2

Investigation Results: Organization Operator p Training g

Site Event Response Organizational Effectiveness Operating Experience 17 Enclosure 2

Robinson Nuclear Plant March 28, 28 2010 Event Review Corrective Actions 18 Enclosure 2

Equipment Warren Farmer Manager g RNP Engineering g g Enclosure 2

Corrective Actions: Equipment Inspect RCP Seals (R)

Inspect B Charging Pump (R)

Replace UAT (R)

Health Assessment of SUT (R) 4 KV Cable Extent of Condition Inspection (R)

Fleet MV Cable Review 20 Enclosure 2

Corrective Actions: Equipment FCV-626 RCP Thermal Barrier Isolation Modification Implementation (R)

Implement Modification for Battery Charger Auto-restart (R)

( )

Troubleshooting Instrument Bus 3 (R)

Review and Conduct as Necessary PMTs on Past NUS Comparator Replacements (R)

Develop Fleet Standard for PMT on Protection and Control Circuits D

Develop l C Configuration fi ti D Documentt for f NUS MModules d l 21 Enclosure 2

Operations Scott Saunders Plant General Manager g

Enclosure 2

Corrective Actions: Operations Leadershipp Assessment ((R))

Crew Reconstitution (R)

Training Actions (R)

Command and Control (R)

Key Parameter Monitoring (R)

Fleet PGM Challengeg of Start-up p ((R))

23 Enclosure 2

Procedures Scott Saunders Plant General Manager g

Enclosure 2

Corrective Actions: Procedures CAPR to revise work management process to provide specific guidance for impact reviews of new Work Requestsq including:

g Guidance for Operations impact reviews Guidance for the Work Order prioritization p

Clarification of expectations for what Validation of a deficiency entails Guidance for conversion of Work Requests to Work Orders 25 Enclosure 2

Corrective Actions: Procedures EOP Foldout revision (R)

AOP-041 Strategy (R)

GP-004 Post-trip stabilization (R)

AOP-024 Loss of instrument bus 26 Enclosure 2

Organization Eric McCartney Vice-President Enclosure 2

Corrective Actions: Organization Review of Outstanding WR/WO (R)

Priority Scope Risk T i i Training Breaker control power Breaker indicating lights 28 Enclosure 2

Corrective Actions: Organization Performance Improvement Formalize follow up to Oversight and Fleet identified performance issues Implement CR3 Performance Improvement Model across the fleet Equipment Performance Case C study t d employee l and d lleadership d hi ttraining i i Revise PMT strategy for risk informed application Organizational Response Revise event response procedures to provide for pp response a technical support p for both forced outage and d non-forced f d outage events 29 Enclosure 2

Plant Design Changes Warren Farmer RNP Manager Engineering Bob Rishel Manager Probabilistic Safety Assessment Enclosure 2

Plant Design Changes Event Related Risk Profile Improvements Battery Charger Auto-load Modification (R)

FCV-626 Power Dependency Modification (R) 4 KV Ground Detection Seal-In Circuit (R)

Dedicated Shutdown Diesel Auto-Start ERFIS SSeall Fl Flow Annunciation A i ti 2nd Start Up Transformer Independent Emergency Power for Deep-Well Pumps 31 Enclosure 2

Plant Design Changes Additional Modifications for Overall Risk Profile Improvement SW Cross Cross-Connect Connect Isolation Valve (R) 4th AFW Pump 32 Enclosure 2

Fleet & Industry Lessons Learned Chris Burton Vice-President - Harris Plant Wayne Gurganious Director Fleet Training Enclosure 2

Fleet & Industry Lessons Learned Operations Stronger pursuit of abnormal plant conditions Electrical systems fundamental knowledge C

Crew composition i i considerations id i Training Scenario design Evaluation standards Procedures EOP and d AOP improvements i t 34 Enclosure 2

Operating Experience PWROG INPO IIssued d Si Significant ifi t Event E t Notification N tifi ti On-site during investigation P t to Post t Nuclear N l Network N t k Chief Nuclear Officer Shared insights with peers at INPO Executive Advisoryy Group p conference 35 Enclosure 2

Summary Eric McCartney Vice-President Jim Scarola Sr. Vice-President and Chief Nuclear Officer Enclosure 2

Appendices 37 Enclosure 2

0 10 20 30 40 50 60 70 80 90 100 28-Ma ar-10 18:43 28-Ma ar-10 18:50 28-Ma ar-10 18:57 28-Ma ar-10 19:04 Charging 28-Ma ar-10 19:12 28-Ma ar-10 19:19 Header Pressure RCS Pressure 28-Ma ar-10 19:26 FCV-626 38 28-Ma ar-10 19:33 Opened 28-Ma ar-10 19:40 28-Ma ar-10 19:48 28-Ma ar-10 19:55 28-Ma ar-10 20:02 28-Ma ar-10 20:09 0

500 2000 2500 LT-115 VCT LEVEL 1500 FT-122 RCS CHARGING 1000 Seal Injection / Charging / VCT Level FLOW

-20 0 20 40 60 80 100 28-Mar--10 18:43 28-Mar--10 18:50 28-Mar--10 18:57 28-Mar--10 19:04 28-Mar--10 19:12 28-Mar--10 19:19 28-Mar--10 19:26 CVC-310A Opens 39 28-Mar--10 19:33 28-Mar--10 19:40 RCP Labyrinth Seal dP 28-Mar--10 19:48 28-Mar--10 19:55 28-Mar--10 20:02 28-Mar--10 20:09 PT-131 RCP A LABYRINTH SEAL PT-128 RCP B LABYRINTH SEAL PT-125 RCP C LABYRINTH SEAL dP in inches water FT 122 RCS CHARGING FLOW FT-122 DP DP DP

RCP Bearing Water Temperature 40 Enclosure 2

RCP Seal Leakoff Temperature 41 Enclosure 2

RCS Temperature and Pressure 600 2500 RCS Pressure 2245 to ~1300 1300 psig RCS Temperature:

500 2000 566 to 442 degrees F 400 1500 300 T-AVE WEIGHTED BY LEG VOLUMES 1000 PT-402 RCS WIDE RANGE 200 PRESSURE Loss of IB-3 500 100 0 0 28-Mar-1 10 18:43 28-Mar-1 10 18:50 28-Mar-1 10 18:57 28-Mar-1 10 19:04 28-Mar-1 10 19:12 28-Mar-1 10 19:19 28-Mar-1 10 19:26 28-Mar-1 10 19:33 28-Mar-1 10 19:40 28-Mar-1 10 19:48 28-Mar-1 10 19:55 28-Mar-1 10 20:02 28-Mar-1 10 20:09 42 Enclosure 2