ML101390494
| ML101390494 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 05/12/2010 |
| From: | Progress Energy Carolinas |
| To: | NRC/RGN-II |
| Shared Package | |
| ML101390483 | List: |
| References | |
| Download: ML101390494 (42) | |
Text
Robinson Nuclear Plant March 28, 2010 Event Review Nuclear Regulatory Commission May 12 2010 May 12, 2010
Introduction Introduction Participants Purpose E
t i
Event overview Event Review Team C
ti ti Corrective actions Lessons being shared with fleet/industry Summary 2
Event Overview Event Overview Tom Natale Event Review Team Member
Event Overview Event Initiated at 1852 Event Overview Event Initiated at 1852 Procedure flow E
i t h ll Equipment challenges Operator response/actions Timeline Review 4
Event Overview 5
4160 V BUS NO. I 4160 V BUS NO.2 4160,. B US N O.3 4160 V BUS NO.4 4160 V BUS NO.5 4KV SYSTEM LOADS KVAC*F1GURE*j RL..~CTO R COOLAN T PUl\\IP "A" 5211
!\\lAIN FEED'VATER PlJ-:\\lP "A " 52/3 C IRClJ"LATl:'G ' VATER PilllP "A" 5212 C O:'\\"DE:-;SATE P lJ-:\\IP "A " 5216 HEATER DR~
Pilll P "A " 5215 STATION SERVICE TR~SFORl\\IER 2B 52/4 BUS 1 A... '"D 2 TIE BREAKER 52110 RL..<\\.CTOR COOL~T PUl\\IP "C" 52114 STATION SERVICE TR~ SFORl\\IER 2A and 2F 5 2113 STATION SER VICE TR<\\.NSFORl\\IER 2C a nd 2G 52115 REACTOR COOLA... NT P Ul\\IP "B " 52127
. lAIN FEED'VATER PlJ-:\\lP "B " 52/26 C IRCULATl:'G ' VATER PillIP "B" 52123 CO:'\\"DE:-;SA TE P lJ-:\\IP "B " 52122 HEATER DR~
PillI P "B " 5 2125 STATION SERVICE TR~ SFORl\\IER 2D 52128 BUS 3 A..'"D 4 TIE BREAKER 52119 4160 V B US 5 52124 C IRCULATING ' VATER PU!\\lP "C" 52133 STATION SERVICE TR~ SFORl\\IER 2E 52/32 Propss Energy
Event Overview 6
TO 2-"2-oKV SWI T CiHrlf.... R D
Event Overview Event Overview 7
Event Review Team Event Review Team Bob Duncan Team Lead
Event Review Event Review Event Response Team Makeup:
Event Response Team Makeup:
Bob Duncan (VP NOD) - Team Lead
(
)
Mark Rigsby (Manager, Site Support CR3)
O i
ti l Eff ti L
d Organizational Effectiveness Lead George Attarian (Manager Major Projects)
George Attarian (Manager, Major Projects)
Technical Engineering Lead 9
Event Review Duncan Management Sponsor Attarian Technical Eng. Lead Riley Electrical Rigsby Organizational Eff. Lead Support for Event Team Natale Work McCabe/Castell Riley - Electrical Georgeson -
Electrical/I&C H
El t i l
Curry - Operations Natale - Work Management Licensing Support Cole Corp Support Communications Hooper - Electrical Koschmeder -
Electrical/I&C Pierce -Training Brown - INPO Loanee Training/Operations Bardauskas Root Cause Team Lead Grubb - CAP Organizational Root McNamara -
Transmission/
System Engineering Spellman -
Operations Sutter Organizational Root Cause Young Technical Team Assistance 10 Ertman - Fire Analysis Operations
Event Review Event Review External Assistance Fire Forensics - Richard Hanson and Associates Fire Modeling Hughes Associates Fire Modeling - Hughes Associates Breakers/Switchgear - Homewood Products, Westinghouse, Areva g
Reactor Coolant Pump parameters -
Westinghouse, Areva C bl EPRI Cables - EPRI Investigation Methods Investigation Methods 11
Investigation Results: Operations Investigation Results: Operations Monitoring of Critical Safety Functions Monitoring of Critical Safety Functions Sub-criticality C
li Core cooling Heat sink RCS integrity RCS inventory Containment integrity 12
Investigation Results: Equipment Investigation Results: Equipment Cable Modifications (1986)
Cable specifications Cable installation/support Breaker 52/24 C
t l
f Control power fuse Knowledge gap pertaining to control power circuit circuit Evaluation of work order 13
Investigation Results: Equipment Investigation Results: Equipment VCT RWST A t S
VCT - RWST Auto Swap Comparator jumper configuration Post-maintenance testing Instrument Bus 3 Instrument Bus 3 14
Investigation Results: Operations 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
Investigation Results: Operations Investigation Results: Operations Additional Insights Path 1 & foldout strategy AOP-041 Monitoring of Key Parameters RCP l
li RCP seal cooling FCV-626 closure Volume control tank level Volume control tank level Charging pump suction swap-over RCS temperature and pressure RCS temperature and pressure 16
Investigation Results: Organization Investigation Results: Organization Operator Training p
g Site Event Response Organizational Effectiveness Operating Experience 17
Robinson Nuclear Plant 28 2010 March 28, 2010 Event Review Corrective Actions 18
Equipment Equipment Warren Farmer Manager RNP Engineering g
g g
Corrective Actions: Equipment 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) 4 KV Cable Extent of Condition Inspection (R)
Fleet MV Cable Review 20
Corrective Actions: Equipment Corrective Actions: Equipment FCV-626 RCP Thermal Barrier Isolation Modification Implementation (R)
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
l C
fi ti D
t f NUS M d l Develop Configuration Document for NUS Modules 21
Operations Operations Scott Saunders Plant General Manager g
Corrective Actions: Operations Corrective Actions: Operations Leadership Assessment (R) p
( )
Crew Reconstitution (R)
Training Actions (R)
Command and Control (R)
Key Parameter Monitoring (R)
Key Parameter Monitoring (R)
Fleet PGM Challenge of Start-up (R) g p ( )
23
Procedures Procedures Scott Saunders Plant General Manager g
Corrective Actions: Procedures Corrective Actions: Procedures CAPR to revise work management process to CAPR to revise work management process to provide specific guidance for impact reviews of new Work Requests including:
q 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
Corrective Actions: Procedures Corrective Actions: Procedures EOP Foldout revision (R)
EOP Foldout revision (R)
AOP-041 Strategy (R)
GP-004 Post-trip stabilization (R)
AOP-024 Loss of instrument bus 26
Organization Organization Eric McCartney Vice-President
Corrective Actions: Organization Corrective Actions: Organization Review of Outstanding WR/WO (R)
Priority Scope Risk T
i i Training Breaker control power Breaker indicating lights 28
Corrective Actions: Organization Performance Improvement Formalize follow up to Oversight and Fleet Corrective Actions: Organization Formalize follow up to Oversight and Fleet identified performance issues Implement CR3 Performance Improvement Model across the fleet across the fleet Equipment Performance C
t d l
d l d
hi t
i i Case study employee and leadership training Revise PMT strategy for risk informed application Organizational Response Revise event response procedures to provide for a technical support response for both forced d
f d
pp p
outage and non-forced outage events 29
Plant Design Changes Plant Design Changes Warren Farmer RNP Manager Engineering RNP Manager Engineering Bob Rishel Manager Probabilistic Safety Assessment
Plant Design Changes Plant Design Changes Event Related Risk Profile Improvements 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 S l Fl A
i ti ERFIS Seal Flow Annunciation 2nd Start Up Transformer Independent Emergency Power for Deep-Well Independent Emergency Power for Deep-Well Pumps 31
Plant Design Changes Plant Design Changes Additional Modifications for Overall Risk Additional Modifications for Overall Risk Profile Improvement SW Cross-Connect Isolation Valve (R)
SW Cross Connect Isolation Valve (R) 4th AFW Pump 32
Fleet & Industry Lessons Learned Chris Burton Vice-President - Harris Plant Wayne Gurganious Director Fleet Training
Fleet & Industry Lessons Learned Fleet & Industry Lessons Learned Operations Stronger pursuit of abnormal plant conditions Electrical systems fundamental knowledge C
i i id i
Crew composition considerations Training Training Scenario design Evaluation standards Procedures EOP d AOP i t
Operating Experience Operating Experience PWROG INPO I
d Si ifi t E t N tifi ti Issued Significant Event Notification On-site during investigation P
t t N
l N t k
Post to Nuclear Network Chief Nuclear Officer Chief Nuclear Officer Shared insights with peers at INPO Executive Advisory Group conference y
p 35
Summary Summary Eric McCartney Vice-President Jim Scarola Sr. Vice-President and Chief Nuclear Officer
Appendices Appendices 37
Seal Injection / Charging / VCT Level Seal Injection / Charging / VCT Level 2500 100 Charging 2000 70 80 90 Charging Header Pressure RCS Pressure 1000 1500 40 50 60 FT-122 RCS CHARGING FLOW LT-115 VCT LEVEL FCV-626 Opened 500 10 20 30 0
0 ar-10 18:43 ar-10 18:50 ar-10 18:57 ar-10 19:04 ar-10 19:12 ar-10 19:19 ar-10 19:26 ar-10 19:33 ar-10 19:40 ar-10 19:48 ar-10 19:55 ar-10 20:02 ar-10 20:09 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 28-Ma 38
RCP Labyrinth Seal dP RCP Labyrinth Seal dP 100 PT-125 RCP C LABYRINTH SEAL 80 100 DP PT-128 RCP B LABYRINTH SEAL DP PT-131 RCP A LABYRINTH SEAL DP FT 122 RCS CHARGING FLOW 40 60 FT-122 RCS CHARGING FLOW CVC-310A Opens 0
20 dP in inches water
-20
-10 18:43
-10 18:50
-10 18:57
-10 19:04
-10 19:12
-10 19:19
-10 19:26
-10 19:33
-10 19:40
-10 19:48
-10 19:55
-10 20:02
-10 20:09 water 28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-28-Mar-39
RCP Bearing Water Temperature RCP Bearing Water Temperature 40
RCP Seal Leakoff Temperature RCP Seal Leakoff Temperature 41
RCS Temperature and Pressure RCS Temperature and Pressure 2500 600 RCS Pressure 2245 to 1300 psig 2000 400 500 2245 to ~1300 psig RCS Temperature:
566 to 442 degrees F 1000 1500 300 400 T-AVE WEIGHTED BY LEG VOLUMES 500 1000 100 200 PT-402 RCS WIDE RANGE PRESSURE Loss of IB-3 0
0 10 18:43 10 18:50 10 18:57 10 19:04 10 19:12 10 19:19 10 19:26 10 19:33 10 19:40 10 19:48 10 19:55 10 20:02 10 20:09 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 28-Mar-1 42