ML112280389

Pre-Application Meeting for Prairie Island Nuclear Generating Plant (Ping) Extended Power Uprate (EPU)

ML112280389
Person / Time
Site:	Prairie Island
Issue date:	08/18/2011
From:	Xcel Energy
To:	Division of Operating Reactor Licensing
Wengert, Thomas
References
Download: ML112280389 (16)

Text

1 Pre-Application Meeting for Prairie Island Nuclear Generating Plant (PINGP)

Extended Power Uprate (EPU)

NRC Headquarters Rockville, MDAugust 18, 2011 2 Introductions*Jim Molden -Vice President of Engineering, Regulatory Affairs and Projects*Tom Verbout -Manager, Prairie Island EPU and LCM Projects*Scott McCall -Prairie Island Design Engineering Manager*Gene Eckholt -Nuclear Projects Licensing Manager 3*Objectives*Background*Project Overview*Licensing Action Interfaces*License Amendment Request (LAR)*Questions/Discussion Agenda 4 Objectives*Open Communications with NRC*EPU Project Status Update*Discuss EPU License Amendment Request Development and Content*Discuss Interfaces Between EPU and other Licensing Actions*Obtain NRC Feedback and Expectations

5 Background

• Initial Licenses-Unit 1 Operating License Issued August 1973-Unit 2 Operating License Issued October 1974 -1650 MWt Original Lice nsed Thermal Power (OLTP)

• Renewed Operating Licenses issued in June 2011-Unit 1 Renewed Operating License Expires August 2033-Unit 2 Renewed Operating License Expires October 2034

6 Background

• Measurement Uncertainty Recapture (MUR)

Uprate-Implemented October 2010*1677 MWtLicensed Power Level*1683 MWtAnalyzed Power Level

• Extended Power Uprate-1804 MWtLicensed Power Level (~109 % of OLTP)-1811 MWtAnalyzed Power Level-Unit 1 Implementation 1R29, 2014 -Unit 2 Implementation 2R29, 2015 Project Overview 2009 2010201120122013 2014 2015= Submittal= NRC ApprovalKey:= Implementation C26 C27 C28 C29 C28 U1 EPU1R261R271R281R292R262R272R282R29 U2 EPUEPU -Phase 3 -Material ProcurementEPU -Phase 4 -Modification DesignEPU -Phase 5 -U1 ImplementationEPU -Phase 6 -U2 ImplementationEPU -Phase 7 -Project Closeout C25 C26 C27U1 Vibration MonitoringU2 Vibration MonitoringEPU -Phase 2 -LAR DevelopmentNRC Review 8 Project Overview

• Major Modifications-Main Generator Rewind (Rotor and Stator)-Generator Step-up Transformer Replacement-High Pressure Turbine Replacement-Moisture Separator Reheater (MSR) Replacement-Auxiliary Feedwater System Upgrades*Same Basic System Design with Larger Pumps and Larger Recirculation Lines

• Pre-Implementation Modification-Vibration Monitoring for Flow Induced Vibration (to be installed 1 cycle prior to EPU implementation on each unit) 9 Project Overview

• Project Status -NSSS Systems *Safety Analysis of Events Impacted by EPU CompleteDemonstrates Safety Analysis Limits are Met at EPU Conditions*Major Components Analysis CompleteDemonstrates Components Capable of Operation at Uprated Conditions Maintaining Adequate Margins*ImpactsUninterrupted Post-LOCA RHR flowFeedwater Isolation Modification-Methodology Changes Identified*RAVE (Locked Rotor/Loss of RC Flow Analyses)RAVE Methodology WCAP-16259-P-A Approved by an SER dated

September 15, 2005Will be Submitted for Plant-Specif ic Approval by the EPU LAR 10*Project Status-Margin Management*Impact of EPU on Plant Margin Being EvaluatedOverall Margin Impact of EPU Evaluated Prior to SubmittalReview Process Includes Pl ant Margin Review BoardMargin Impact Also Evaluated as Part of the Modification Process Project Overview 11 Project Overview

• Project Status -BOP Systems *System and Program Evaluations 95% Complete*Auxiliary Feedwater System ModificationPreliminary Design Option Chosen*Component Cooling Pump Impellers-Electrical Systems Analyses*Preliminary MISO Study CompletedBased on Assumed Prior-Queued ProjectsAdditional Power Assumptions Bound EPU DesignNeed for Additional Capacitor Banks and Voltage Support Identified*MISO Study Completion Prior to Implementation of EPU 12 Project Overview

• Status of LAR Development -Licensing Report Sections*95% Drafted -LAR Submittal Packages*Under Development 13 Licensing Action Interfaces2008 200920102011 2012 2013 2014 2015

= Submittal= NRC ApprovalKey:= Implementation C25 C26 C27 C28 C29 C25 C26 C27 C28 U1 EPU1R251R261R271R281R292R252R262R272R282R29 U2 EPU U2 RSGRSG SubmittalsEPU -U1/U2Spent Fuel Pool CriticalityAlternative Source TermLeak Before BreakNFPA-805 14 License Amendment Request

• EPU License Amendment Request Approach-Content and Structure in Accordance with RS-001, "Review Standard for Extended Power Uprates"*Content and structure followed closely *PINGP is not designed to GDCs-Applicable Operating Experience Reviewed and Considered in EPU LAR*Continuous Process Through EPU Implementation*Includes Review of Applicable NRC Requests for Additional Information (RAIs) -LAR Content will be Frozen Prior to Submittal*Necessary to Support Validation and Final Reviews 15 License Amendment Request

• NRC Acceptance Review Expectations-Acceptance Review Expectations Appear to be Changing-Recent Acceptance Review RAI*All Structural Modifications and/or Additions Identified and Designed*All Structural Evaluations and Required Calculations Completed*All Controlled Documentation Exists Which Finds SSCs Structurally Adequate for EPU Conditions-Component Level Detailed Design Not Scheduled for Completion Prior to PINGP EPU LAR Submittal. -Significant Impact on Schedule for Submittal of PINGP EPU LAR*AFW System Redesign*Piping Support Modifications*Feedwater Isolation 16 Questions/Discussion