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

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

Extended Power Uprate (EPU)

NRC Headquarters Rockville, MD August 18, 2011 1

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 2

Agenda

• Objectives

• Background

• Project Overview

• Licensing Action Interfaces

• License Amendment Request (LAR)

• Questions/Discussion 3

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 4

Background

• Initial Licenses

- Unit 1 Operating License Issued August 1973

- Unit 2 Operating License Issued October 1974

- 1650 MWt Original Licensed 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 5

Background

• Measurement Uncertainty Recapture (MUR)

Uprate

- Implemented October 2010

• 1677 MWt Licensed Power Level

• 1683 MWt Analyzed Power Level

• Extended Power Uprate

- 1804 MWt Licensed Power Level (~109 % of OLTP)

- 1811 MWt Analyzed Power Level

- Unit 1 Implementation 1R29, 2014

- Unit 2 Implementation 2R29, 2015 6

Project Overview 2009 2010 2011 2012 2013 2014 2015 EPU - Phase 2 - LAR Development NRC Review EPU - Phase 3 - Material Procurement EPU - Phase 4 - Modification Design EPU - Phase 5 - U1 Key: Implementation

= Submittal

= NRC Approval EPU - Phase 6 - U2 Implementation

= Implementation EPU - Phase 7 - Project Closeout 1R26 C26 1R27 C27 1R28 C28 1R29 C29 U1 Vibration Monitoring U1 EPU C25 2R26 C26 2R27 C27 2R28 C28 2R29 U2 Vibration Monitoring U2 EPU

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) 8

Project Overview

• Project Status

- NSSS Systems

• Safety Analysis of Events Impacted by EPU Complete 3/4 Demonstrates Safety Analysis Limits are Met at EPU Conditions

• Major Components Analysis Complete 3/4 Demonstrates Components Capable of Operation at Uprated Conditions Maintaining Adequate Margins

• Impacts 3/4 Uninterrupted Post-LOCA RHR flow 3/4 Feedwater Isolation Modification

- Methodology Changes Identified

• RAVE (Locked Rotor/Loss of RC Flow Analyses) 3/4 RAVE Methodology WCAP-16259-P-A Approved by an SER dated September 15, 2005 3/4 Will be Submitted for Plant-Specific Approval by the EPU LAR 9

Project Overview

• Project Status

- Margin Management

• Impact of EPU on Plant Margin Being Evaluated 3/4 Overall Margin Impact of EPU Evaluated Prior to Submittal 3/4 Review Process Includes Plant Margin Review Board 3/4 Margin Impact Also Evaluated as Part of the Modification Process 10

Project Overview

• Project Status

- BOP Systems

• System and Program Evaluations 95% Complete

• Auxiliary Feedwater System Modification 3/4 Preliminary Design Option Chosen

• Component Cooling Pump Impellers

- Electrical Systems Analyses

• Preliminary MISO Study Completed 3/4 Based on Assumed Prior-Queued Projects 3/4 Additional Power Assumptions Bound EPU Design 3/4 Need for Additional Capacitor Banks and Voltage Support Identified

• MISO Study Completion Prior to Implementation of EPU 11

Project Overview

• Status of LAR Development

- Licensing Report Sections

• 95% Drafted

- LAR Submittal Packages

• Under Development 12

Licensing Action Interfaces 2008 2009 2010 2011 2012 2013 2014 2015 Alternative Source Term Leak Before Break Spent Fuel Pool Criticality Key: EPU - U1/U2

= Submittal

= NRC Approval RSG Submittals

= Implementation NFPA-805 1R25 1R26 1R27 1R28 1R29 C25 C26 C27 C28 C29 U1 EPU 2R25 2R26 2R27 2R28 2R29 C25 C26 C27 C28 U2 RSG U2 EPU 13

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 14

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 15

Questions/Discussion 16