ML111810534

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Enclosure 2, NRC Public Meeting, Watts Bar Unit 2
ML111810534
Person / Time
Site: Watts Bar Tennessee Valley Authority icon.png
Issue date: 06/20/2011
From:
Tennessee Valley Authority
To:
NRC/RGN-II
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ML111810265 List:
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Download: ML111810534 (33)
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Text

NRC Public Meeting WATTS BAR UNIT 2 Enclosure 2

Agenda

  • Project Schedule Update
  • Inspection / Closure Packages Status
  • Cross Cutting Issues
  • Heinemann Breaker Response / Plan
  • Questions

Purpose of Briefing

  • Provide an overview of the schedule support of completion of Watts Bar Unit 2.
  • Describe the status of activities in support of completion of Watts Bar Unit 2.

WBN2 Completion Status Engineering

  • Overall Progress - 85% complete
  • All Engineering Resources at Site
  • Current Focus Areas and Challenges

- Field Support

- Corrective Action Programs and Special Programs Completion Construction

  • Successfully completed scope required for the Unit 1 outage
  • Improved direct work productivity (19.7% to 25%)
  • Overall Progress - >62.5% complete
  • Current Focus Areas and Challenges

- Staffing critical positions

- Field Engineers

- Planners (work plan writers)

- Developing workable backlog of work plans to support craft load (currently 350K)

- Staffing craftsmen to support up to 60,000/week earned hours for direct work

WBN2 Completion Status Refurbishment

  • Active Refurbishment Program Status

- Safety-Related Valves (all types) - 70%

- Safety-Related Pumps - 77%

- Safety/Quality-Related Motors - 90%

Startup Testing

  • Twenty-five systems turned over to Startup Test Organization with three being turned over in May.
  • Integrated Safeguards Test - To be performed with Unit 1 on-line after Hot Functional Tests.
  • Essential Raw Cooling Water - Informational flow balance completed during Unit 1 outage Spring 2011 - Final flow balance without mid-cycle outage.

WBN2 Completion Status Area Completion - Control Room

WBN2 Completion Status Area Completion - Control Room

WBN2 Completion Status Area Completion - Condenser Circulating Water (CCW) Pump Room

WBN2 Completion Status Area Completion - CCW Pump Room

WBN2 Completion Status Area Completion - Main Turbine Deck

WBN2 Completion Status Area Completion - Main Turbine Deck

WBN2 Construction Schedule Update

  • Schedule Reassessment Process
  • System Turnover Schedule
  • Validation Process

- Construction Productivity - - Summer Push

- Startup Productivity - - Fall Push

  • Major Milestone Schedule

Schedule Reassessment Process March April May June Staff & Implement Integrated Schedule Org Finalize Standard Startup Logic Load WITEL Establish System Ties Validate Startup Test Duration 04/18/11 Define Cable / Terminations / Conduit Remainingg - Estimate - Scope p to System y

Establish Logic Ties in Schedule 3-Week Lookahead Levelized Identify Target 04/30/11 Crit Path Define & Estimate Remaining Scope to Systems Finalize Commodity Curves Establish Logic Resource To Systems Levelize 05/20/1 05/09/11 Management Develop Engineering Schedule Review Issue Schedule Develop Licensing Schedule 05/31/11 Updated: 6/15/11

System Turnover Schedule Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10 Oct-10 Nov-10 Dec-10 Jan-11 Feb-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12 Mar-12 Apr-12 May-12 030G 030I 040 085 030C 094 030L 250 078 026 031 043 077 251 013 030K 046.1 081.1 030J.1 304.1 030J 015 046B 234 047B 037 063.1 014 030D 030E 081 202 068 059 052 092 047A 061.1 046A 209 067.3 030N 005 030F 030A 201 030O 072 001 041 090 064 271 280 035B 032 024 261 002.2 210 054 203 058 002 244 074 062 063 003A 065 079 228 030H 027 055 098 024.1 007 035C 035A 099 067.1 067.2 047C 030M 067 036 006 070 061 084 030B 203 003B 270 033 268

Pipe Fitter Staffing Levels Electrician Staffing Levels Instrument Fitter Staffing Levels All Craft Staffing Levels Validation Process

  • Construction Productivity - - Summer Push Validate Unit Rate Performance Validate Peak Direct Work Earn Performance Validate Staffing Performance Validate Paper Closure Performance

Construction Productivity - Summer Push Validation Process

  • Startup Productivity - - Fall Push Validate Startup Test Procedure Performance Validate Component Test Performance Validate Startup Organizational Performance Validate Milestone Focused Performance

Startup Productivity - Fall Push WBN UNIT 2 TURBINE BUILDING (TB) TURNOVER MILESTONES DATE: 06/16/11 08/01/11 08/15/11 09/09/11 10/01/11 05-2012 READY FOR READY FOR READY FOR READY FOR EST MAIN HYDRO EST MFW PUMP EST CONDENSER TB READY FOR MAIN CONDENSER SHORT CYCLE RECIRC LONG CYCLE VACUUM HFT 002- Condensate 003 - Main & Aux Feedwater 030M - TB Supply Fans 005 - Extraction Steam 014 - Condensate Demineralizer 030N - TB Exhaust Fans 006 - Heater Drns & Vents 024 - Raw Cooling Wtr 036 - Feedwater Secondary Treatment 007 - turbine Extraction Traps & Drns 030O TB Pump & Clrs 040 - Station Drainage Sys (TB Portion Only) 027 - Condensate Circulating Wtr 032 - Control Air 043 - Sampling & Wtr Quality Sys (TB Portion Only) 037 - Gland Seal Water Sys 046A - Main Fw Ctrl Sys 054 - Injection Wtr Sys 201 - 6.9kV Unit Pwr 203 - 480V Unit Pwr Sys 209 - TB Mtr Opr Vlv Pwr 210 - TB Ventilation Pwr TURBINE ON GEAR MAIN GEN & GEN COOLING &

BUS DUCT STATOR WATER I/S 058 - Gen Bus Cooling Sys 035A - Gen Hydrog Clr Sys 244 - Main Gen Elec 7 24kV Pwr 035B - Gen Hydrog Seal Oil 035C - Stator Cooling Wtr 044 - Bldg Heat Sys 047A - Turbine Control Oil 047B - Turbine Lube Oil 047C - Turbine Steam Seal 033 - Service Air Sys (TB Portion Only)

TURNED OVER TO STARTUP C:\Nick\frags\WBN2-SU-Major-Milestones

Major Milestone Schedule WBN UNIT 2 STARTUP MAJOR MILESTONES Revision 1 - 6/8/11 SEPT 12/05/11 04/19/12 04/20/12 05/07/12 05/20/12 05/20/12 09/28/12 JULY 10/07/11 02/22/12 02/27/12 03/10/12 03/23/12 03/23/12 07/31/12 SECONDARY OPEN VESSEL RCS FILL & PLT HFT COLD HYDRO ILRT CORE LOAD 030A- AB Room & Area Coolers 013 - Fire Detection 052 - Loose Parts Monitoring 030E - Ctmt Air Return Fans 002 - Condensate 001 - Main Steam Sys 030B - AB Space Heaters 032 -Control Air Sys 068 - Reactor Coolant 030H - Lower Compartment Clrs 030F - Ctmt Vent Air Cleanup Units 003 - Main & Aux Feedwater 003A - Main Feedwater 030K - Rx Bldg Space Heaters 055 - Annunciator 202 - 6.9kV Rx Coolant Pmp Pwr 030J - Containment Purge 005 - Extraction Steam 003B - Aux Feedwater 078 - Spent Fuel Pit Cooling Sys 062 - Chemical & Volume Cntl Sys 061 - Ice Condenser 006 - Heater Drns & Vents 015 - Steam Gen Blowdown 079 - Fuel Handling & Str Sys 063 - Safety Injection Sys 064 -Primary Containment Sys 007 - Turbine Extraction Traps & Drns 030C - N&S Vlv Vault Exhaust 084 - Flood Mode Boration Sys 063.1 - Safety Injection Partial 065 - Emergency Gas Treatment (EGT014 - Condensate Demineralizer 030D - TDAFW Pmp Rm Exhaust Fan 092 - Neutron Monitoring Sys 067 - Essential Raw Cooling Water 072 - Containment Spray 024 - Raw Cooling Wtr 030G - Upper Compartment Clrs 094 - Incore Instr Sys RDA 070 - Component Cooling Water Sys 090 - Radiation Monitoring 026 - High Pressure Fire Protection 030I - CRDM Clrs 228 - Aux Bldg Lighting Sys 074 - Residual heat Removal Sys 027 - Condensate Circulating Wtr 030L - Pres Pres, Temp & Humidity Mon.

Mon 234 - Heat Trace Sys 077 - Waste Disposal 030M - TB Supply Fans 031 - Incore Inst Rm A/C 268 - Perm. Hydro Mitigation Sys 081 - Primary Makeup Water Sys 030N - TB Exhaust Fans 041 - Layup Water Treatment Sys 270 - TB Crane & Misc Sys 098 - Foxboro IA 032 - Control Air 043 - Sampling & Wtr Quality Sys 271 - Ctmt & AB Cranes & Misc 099 - Reactor Protection Sys 033 - Service Air Sys 046B - Aux FW Ctrl Sys 261 - Plant Computer Sys 035A - Gen Hydrog Clr Sys 059 - Demin Water & Cask Decon 035B - Gen Hydrog Seal Oil 085 - Control Rod Drive Cbnt Refurb 035C - Stator Cooling Wtr 250 - Auto/Manual/Public Phone 036 - Feedwater Secondary Treatment 251 - Sound-Powered Phone 037 - Gland Seal Water Sys 040 - Station Drainage Sys 044 - Bldg Heat Sys 046A - Main Fw Ctrl Sys 047A - Turbine Control Oil 047B - Turbine Lube Oil 047C - Turbine Steam Seal 054 - Injection Wtr Sys 058 - Gen Bus Cooling sys 201 - 6.9kV Unit Pwr 203 - 480V Unit Pwr Sys 209 - TB Mtr Opr Vlv Pwr 210 - TB Ventilation Pwr 244 - Main Gen Elec 7 24kV Pwr 300 - TB Pump / Space Clrs TURNED OVER TO STARTUP C:\Nick\frags\WBN2-SU-Major-Milestones

WBN2 Commitment Closure Process

  • Plan Developed to Programmatically Close Commitments o Closure Procedure Established o Tracking Mechanism Established o Dedicated Closure Team Established o Initial Schedule and Assignments Completed o Closure Packages Being Submitted to Inspection Staff
  • Closure Status o CAP and Special Programs o Commitment Closure Actions

WBN2 Commitment Closure Process WBN2 Commitment Closure Process WBN2 Commitment Closure Process WBN2 Cross Cutting Theme

  • Issue o Procedure Compliance Challenges Identified In 2010
  • Actions Taken o Training Upgraded to Include Case Studies of Identified Weaknesses o Training Performed for Unit 2 Site Personnel o Effectiveness Assessments Performed
  • Results o Improvement has been limited o Procedure Compliance Challenges Continue to Occur o Evaluation of Recent Weaknesses in Progress

WBN2 Cross Cutting Theme Heinemann Circuit Breaker

  • Actions o TVA Admitted the Violations Occurred o 1974 and 1992 Qualification Tests Reviewed to Confirm Consistency with Field Configuration o Breakers Confirmed Properly Mounted and Rigidly Locally Mounted o EPDM Added to Aid Front to Back Alignment of the Breakers o Push Test Successfully Performed o Breaker Configuration Changes Captured in TVA Inventory Control and Drawing o Current Breaker Mounting Configurations in Full Compliance with Requirements o Revision to Installation Procedure Guidance - September 2011

Heinemann Circuit Breaker

  • Independent Review o ARES Corporation Performed Independent Technical Review o Qualification of Original and Re-Configured Heinemann Circuit Breakers o ARES Conclusions o Breakers are Rigidly Mounted to the Instrument Power Boards o 1974 Seismic Test Replicated the Mounting Configuration in the Plant o Power Boards and Breakers met IEEE 344-1971 o Rigid Connections Replicated and IEEE 344-1975 Satisfied by1992 Seismic Test o Aging Does Not Affect Seismic Performance and Clamping Pressure Does Not Directly Contribute to the Safety Related Functions of the Breaker.

o Reconfigured Breaker Does Not Affect Seismic Qualification o Qualified Electrical and Mechanical Configuration of the Breakers Helps to Limit Seismic Motion and Shocks

Lessons Learned System Testing

  • Construction to Start-up Test Group Process o Adverse Trend Identified During Emergency Raw Cooling Water System Component Testing & System Walkdowns o 18 Valves Affected
  • Project Management Placed a Hold on Turnover of Safety Related Systems/Components
  • Common and nd Root Cause C e Evaluations E l tion Performed Pe fo med
  • Extent of Condition/Cause Evaluation Performed
  • Corrective Actions o Construction to Perform Pre-Turnover Walkdowns o Define Single Point Accountability in the Construction System Completion Group o Improve Documentation & Processing of Deficiencies

QUESTIONS?

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