ML091330741

Slides of NRC Advisory Committee on Reactor Safeguards Subcommittee on Plant Operations and Fire Protection

ML091330741
Person / Time
Site:	Watts Bar
Issue date:	03/31/2009
From:	Giitter J Advisory Committee on Reactor Safeguards
To:
Banerjee M ACRS 415-6973
References
Download: ML091330741 (47)

Text

ACRS Subcommittee on Plant Operations &

Fire Protection March 31, 2009

NRC Review of Operating License Application for Watts Bar Nuclear Plant Unit 2 Joseph G. Giitter, Director Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

Overview

• Background

-Brief history of construction and licensing of Units 1 and 2

-Commission direction on licensing basis

-NRR Office Instruction on Watts Bar 2 Review

• Regulatory Framework Established in NUREG-0847, Supplement 21, Safety Evaluation Report Related to the Operation of Watts Bar Nuclear Plant, Unit 2

• Construction Reactivation

• Lessons Learned from Browns Ferry Unit 1 Restart

• Refurbishment of Plant Equipment

• Inspections

• Integrated Schedule

• Conclusion

=

Background===

Patrick Milano Senior Project Manager DORL/NRR

Plant Design Information

• Watts Bar (WBN) Unit 2 is a Westinghouse designed 4-loop PWR with an ice condenser type containment.

• Proposed reactor power is 3411 megawatts thermal.

• Cooling tower with supplemental cooling from river.

Background - Brief History

• January 23, 1973 - NRC issues CPs for WBN Units 1 & 2.

• September 27, 1976 -TVA applies for operating licenses (OLs) for Units 1 and 2.

• February 20, 1985 - TVA certification of readiness for the OL.

• September 17, 1985 - NRC requests information on TVA plans to address deficiencies in operating and construction.

• November 1, 1985 - TVA submits Nuclear Performance Plan (NPP) to address corporate and programmatic issues.

• April 11, 1986 - TVA rescinds 2/20/85 certification -- not seeking OL at this time

Background - Brief History Cont.

• 1990 - 1995 - TVA addresses WBN Unit 1 construction quality issues.

• February 7, 1996 - TVA receives OL for Unit 1.

• July 14, 2000 - TVA states Unit 2 meets the definition for deferred plant status in accordance with the Commission Policy Statement.

• July 25, 2007 - Staff Requirements Memorandum SECY 0096 provides for the licensing and inspection program approach for possible reactivation and construction.

Background - Brief History Cont.

• August 3, 2007 - TVA informs NRC that it would resume construction on WBN Unit 2 in 120 days.

• July 7, 2008 - NRC issues order extending the construction permit for WBN Unit 2 to March 31, 2013.

• February 27, 2009 - SSER 21 issued.

• March 4, 2009 - TVA update to OL application for WBN Unit 2.

NUREG-0847 Supplement 21 Patrick Milano

NUREG-0847, Supplement 21 SRM SECY-07-0096 of July 25, 2007

• Unit 1 current licensing basis as reference basis for licensing of Unit 2

- Review any Unit 1 exemptions, reliefs, and other actions to determine whether the same allowance is appropriate for Unit 2

- Significant changes to licensing approach allowed where backfit rule would be met or as necessary to support dual unit operation

- Encourage updated standards for Unit 2 where it would not significantly detract from design and operational consistency between Units 1 and 2

- Look for opportunities to resolve generic safety issues where unirradiated state of Watts Bar 2 makes the issue easier to resolve than at Watts Bar 1

NUREG-0847, Supplement 21 NRR Office Instruction LIC-110

• Watts Bar Unit 2 License Application Review

• Establishes the organization and roles and responsibilities

• Details process work flow and management controls

• Coordination of reviews conducted by other offices

- Nuclear Security and Incident Response - EP and Security

- Nuclear Material Safety and Safeguards - Part 70 License

- Nuclear Regulatory Research - IPE/IPEEE

• Scope of construction and inspection activities addressed separately by Region II

• Guides staff through process leading to issuance of OL

• Reactivation Assessment Group

NUREG-0847, Supplement 21 Staff Considerations

• Original SER documented in NUREG-0847, June 1982

• Supplements 1 through 4 dealt with Units 1 & 2

• After Supplement 4 in March 1985, licensing activities put on hold because of problems identified at TVA plants

• Supplements 5 (November 1990) through 20 (February 1996, with Unit 1 full-power license)

-Focus primarily on licensing of Unit 1

-Some WBN Unit 2 issues were addressed

• Supplement 21 provides baseline for remaining evaluation of WBN Unit 2

NUREG-0847, Supplement 21 Establishment of Regulatory Framework for Watts Bar Unit 2

• January 2008 - TVA presents regulatory framework

• March 2008 - TVA issues baseline status document

• May 2008 - TVA provides changes to Cable Issues CAP

• August 2008 - Final assessment of generic communications topics

• September 2008 - TVA submits status of CAPs and SPs

• October 2008 - Final assessment of framework of open SER topics

• October 2008 - R-II completes construction reconstitution

• February 2009 - Staff assessment of CAPs and SPs

NUREG-0847, Supplement 21 Scope and Objectives of the Supplement

• Items for Program Resolution in SER

• Resolution of Generic Communications Issues

• Program Resolution of Corrective Action and Special Programs

• Authorization to Transfer ASME Code Symbol Stamps

Construction Inspections Robert Haag Branch Chief Region II

Construction Phase IMC 2512 Startup Testing IMC 2514 NRC Construction Inspection Program Preop Testing

& Operational Prep IMC 2513

Region II Construction Inspection Program Division of Construction Inspection Division Of Construction Projects Construction Inspection Branches Construction Projects Branch 3 Senior Project Inspector Project Inspector Senior Resident Inspector Resident Inspectors Specialist Inspectors Construction Inspection Organization

Inspection Program Development

• IMC 2517, Watts Bar Unit 2 Construction Inspection Program, issued February 15, 2008.

• Desk-Top Guidance for Completion of 2512 IPs

• Phase 1: Identify inspections in old reports and compare to inspection requirements (reconstitution)

• Phase 2: Inspection Scoping: Based on Phase 1 and Additional Considerations identify future inspections. Items to Consider: allegations, generic Issues, CDRs, old open items, new/re-work, licensing issues, etc.

• Phase 3: Perform inspections: Closure of the IPs and the bases for closure will be documented in inspections reports.

Inspection Program Elements Inspection Program Generic Communications Previously Completed Inspections (Reconstitution)

New Or re-work CAPs/SPs Licensing issues Allegations Historical Open items (VIO,NCV,IFI..)

Assessment Process Assessments (Quarterly, Mid Cycle,

End Of Cycle)

Assessments (Quarterly, Mid Cycle,

End Of Cycle)

Inspection Program Results Annual Public Meeting Cross-cutting aspects reviewed during Mid Cycle & End of Cycle

Inspection Accomplishments

• Established WB2 Resident Office: 1 SRI and 2 RIs

• Performed Readiness Inspection

• Completed Reconstitution reviews for 35 Inspection Procedures in 2512

• Reviewed Historical Allegations: Out of ~1000 allegations, identified 59 for further action

• Reviewed Bulletins, GLs, TMI items, and TIs for applicability to Unit 2: 120 items will be inspected

• Performed 2008 End-of-cycle assessment

Upcoming Activities & Challenges

• Perform PI&R inspection

• Ensure adequate inspection resources available; given the uncertainty of inspection planning

• Inspect and close out 29 CAPs and SPs

• Develop ROP transition plan

• Prepare for Pre-operation Inspections (2513) and Start-up Testing Inspections (2514)

Integrated Schedule Patrick Milano

Integrated Schedule

• January 2009 - TVA submitted information for supplemental ES.

• April 2009 - Plan to issue Federal Register Notice for additional opportunity for hearing on operating license application.

• April 2009 - Planned public meeting on annual assessment results.

• April 2010 - Plan to issue draft ES for comment.

• January 2011 - Plan to complete technical review.

• April 2011 - Plan to issue Final ES for plant operation.

• November 2011 - Plan to have final ACRS meeting for OL.

• November 2011 - Plan to complete ASLBP.

• January 2012 - Planned Commission briefing.

• April 2012 - Plan to issue low-power license.

• September 2012 - Plan to issue full-power license.

Conclusion Patrick Milano

Conclusion

• Staff requests an ACRS Letter Report in May 2009 with the ACRS recommendations for the current review starting point.

• Staff plans to present updates to the ACRS Subcommittee:

• March 2010

• March 2011

• September 2011 (at site)

• October 2011(if necessary)

• Staff plans to present to the ACRS Full Committee in November 2011 for the final ACRS Letter Report for the Watts Bar Unit 2 Operating License.

• Staff will brief Commission in January 2012.

• Plan to issue full-power operating license in September 2012.

1 Advisory Committee on Reactor Safeguards TENNESSEE VALLEY AUTHORITY WATTS BAR NUCLEAR PLANT UNIT 2 Subcommittee Meeting March 31,2009

2 Agenda

• Current Licensing Basis

• WBN Unit 2 Construction Reactivation

• Project Oversight

• Lessons Learned

• Refurbishment

• Unit Differences

• Conclusion M. Bajestani

3 Current Licensing Basis

Background:

• September 1985 - NRC 50.54f Show Cause Letter to TVA Corporate, SQN, BFN and WBN

• Late 1985 - WBN Unit 2 Construction Suspended

• 1986-1991-TVA Recovers SQN Units 1 and 2 and BFN Unit 2

• May 1988 - Nuclear Performance Plan (NPP) Volume 4 Describes Actions to Identify and Correct Problems at WBN

• December 1989 - Safety Evaluation Report WBN Unit 1 NPP (NUREG-1232)

• 1991-1995 TVA recovers BFN Unit 3 G. Arent

4 Current Licensing Basis

Background:

• October 1995 - WBN FSAR Amendment 91 issued

• November 1995 - Low Power Operating License for WBN Unit 1 issued

• February 1996 - Operating License for WBN Unit 1 issued

• July 2000 - TVA Formally Deferred WBN Unit 2

• 2002 - 2007 TVA recovers BFN Unit 1

• April 2007 WBN Unit 2 Key Assumptions

• License under 10 CFR Part 50

• WBN Unit 1 Current Licensing Basis

• July 2007 Staff Requirements Memorandum G. Arent

5 Current Licensing Basis

• Safety Evaluation Report (NUREG-0847) Review for Operating License

• Many Items Resolved as Part of WBN Unit 1 Operating License

• SSER 1-4

• SSER 5-20

• SSER 21

• Generic Letters, Bulletins, Circulars and TMI Items

• Many Items Resolved as Part of WBN Unit 1 License

• Corrective Action Programs and Special Programs

• Using WBN Unit 1 Precedent

• Changes to WBN Unit 1 Precedent under review G. Arent

6 Current Licensing Basis

• Licensing Basis Preservation

• Construction Permit Extended to March 2013

• Final Supplemental Environmental Impact Statement

• Severe Accident Mitigation Alternative Analysis

• Final Safety Analysis Report - Revision 92

• Common system changes since 1995

• Operating License Application Update

• Technical Specification

• Technical Requirements Manual

• Radiological Emergency Plan

• Security Plan

G. Arent

7 WBN Unit 2 Construction Reactivation

• August 2007 - TVA Board Approves 5 Year Program for Completion of Construction of WBN Unit 2

• Detailed Scoping Estimating and Planning Study provided a thorough analysis

• Plant equipment and materiel condition good

• WBN 1 and SQN 1/2 plants are proven technology

• Project risks well scoped and manageable

• High confidence in cost and schedule M. Bajestani

8 WBN Unit 2 Construction Reactivation Guiding Principles for Construction Completion :

• Ensuring public health and safety

• Safe continued / uninterrupted operation of WBN Unit 1

• Fidelity of the Unit 1 and Unit 2 Design Basis and physical operation

• Maintaining a consistent, predictable, transparent process for completion and licensing

• Incorporated WBN Unit 1 Changes Since Initial Start Up and in 5 Year Plan M. Bajestani

9 Project Oversight

• Engineering Procurement and Construction

• Field Manager / Supervisor Observations

• Quality Control Inspection of Work Activities

• Quality Assurance Oversight of Appendix B Activities

• Project Management Review Committee

• TVA Oversight of EPC Contractor

• TVA Management Oversight

• TVA Quality Assurance Oversight

• TVA Board Advisory Committee for WBN

• Construction Completion Management Review Committee

• Independent Industry Experts M. Bajestani

10 Project Oversight Current Staffing

• Engineering - Bechtel - 711 / TVA - 36

• Construction - Bechtel Manual - 258 / TVA - 9

- Non-Manual - 211

• Project Controls - Bechtel - 75 / TVA - 12

• Nuclear Assurance - Bechtel - 33 / TVA - 6

• Supply Chain - Bechtel - 33 / TVA - 7

11 WBN Unit 1

• Organizational Structure

• Safety Conscience Work Environment

• Configuration Control

• Mature Corrective Action Program Lessons Learned M. Bajestani

12 Browns Ferry Unit 1

• Oversight and Project Management

• Avoid distractions

• Limit concurrent licensing activities

• Project sequencing

• Workforce Issues

• Availability of workforce

• Specialized skills

• Critical skills

• Material and Contract Issues

• Long lead times Lessons Learned M. Bajestani

13

• Construction

• First time evolution checklist

• Nonroutine activities by cross-discipline teams

• Human performance tools

• Vendor technical support of new equipment

• Detailed orientation package Industry

• NRC

• INPO

• NEI Lessons Learned M. Bajestani

Unit Separation

• Unit Separation Program

• Physical and Operational separation of operating unit systems and components from construction accomplished by use of lifted wires, removal of valve handwheels, installation of blind flanges

• Fencing and chain

• Tagging and marking

• Unit 2 craft personnel wear YELLOW hardhats

• Designated walkways

• Construction Access 14 M. Bajestani

Unit Separation

• Separate Organization

• Work in operating spaces reviewed daily

• Work Orders reviewed by experienced Operations personnel

• Problem Evaluation Reports (CAP) reviewed for operability by Operations personnel

• Work on Common systems uses WBN Unit 1 processes 15 M. Bajestani

16 WBN Unit 2 Integrated Schedule DSEP TVA Board Decision Full Power Operation October 2012 FY 2007 FY 2008 FY 2009 FY 2010 O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M J J A S O N D J F M A M FY 2011 FY2012 FY 2013 FSAR Amendment / OL Update - March 2010 Ready for Fuel Load April 2012 Regulatory Framework Construction Reactivation letter Licensing Activity Significant Project Milestone Major Engineering Complete - December 2009 Detailed Project Schedule Commence Principal Construction Activities Turbine on Turning Gear - October 2010 Primary Hydro - May 2011 Hot Functional - August 2011 E. Freeman

17 WBN Unit 2 Integrated Schedule Critical Path Essential Raw Cooling Water Near Critical Path Moisture Separator Reheaters Ice Condenser Reactor Protection - Eagle 21

E. Freeman

18 WBN Unit 2 Completion Overview COMMODITY TOTAL PROJECT (approximate)

Piping - Large Bore 8,000 feet Piping - Small Bore 30,000 feet Hangers 9,400 Cable 840,000 feet Conduit 73,000 feet Conduit Supports 12,000 Terminations 193,000 Tubing 57,000 feet E. Freeman

19 Refurbishment

• Rework or Replace Components based on

• Programmatic requirements

• Vendor recommendations

• Lessons Learned from WBN Unit 1

• Operating Experience

• No credit for layup

• Replacement of Elastomer Seats, Gaskets and Packing as required to Restore Components to Meet or Exceed Original Specifications

• Component testing to ensure design intent met

E. Freeman

20 Unit Differences

• Unit Differences Identified by Procedure

• Operational differences

• Maintenance differences

• Minimize Differences to Maximize Unit Fidelity

• Dual Unit Operator Licenses

• Equipment Replacement

• Inadequate Core Cooling Monitor - Common Q

• Core Flux Monitoring - Wincise E. Freeman

Conclusion 21 M. Bajestani