ML20104C035

Pseg/Nrc Pre-Submittal Meeting, Salem Expanded Scope Leak-Before-Break Amendment Request - April 15, 2020

ML20104C035
Person / Time
Site:	Salem
Issue date:	04/15/2020
From:	Public Service Enterprise Group
To:	Office of Nuclear Reactor Regulation
Kim, James
References
Download: ML20104C035 (11)

Text

PSEG/NRC Pre-Submittal Meeting Salem Expanded Scope Leak-Before-Break Amendment Request April 15, 2020

Agenda Overview of Proposed Change Purpose and Scope of License Amendment Request Specific Discussion Topics Proposed Schedule 2

Overview of Proposed Change Salem 1 & 2 License Amendment Request (LAR) S19-08

• Requests NRC Approval of Leak-Before-Break for Specific Piping Attached to Reactor Coolant System (RCS) Primary Loops

• 6-inch Safety Injection (SI)

• 10-inch Accumulator Lines

• 14-inch Residual Heat Removal (RHR)

• 14-inch Pressurizer Surge Line

• Evaluation Approach is Similar to Previously Approved LARs, e.g., D.C. Cook and Waterford 3

Overview of Proposed Change

• No Proposed Technical Specification Changes

• UFSAR Changes via 10CFR50.59 Part of Amendment Implementation

• UFSAR Impact Described in LAR

• Allows Removal of Dynamic Effects of Pipe Rupture for the In-Scope Piping 4

Purpose and Scope of LAR

• Supports Planned Core Upflow Conversion (UFC)

Modification for the Salem 2 Fall 2021 Refueling Outage

• UFC Reduces Baffle Bolt Loads but Requires Evaluation of Pipe Break Loads

• Outage Planning Depends on Amendment Approval

• LAR Scope Similar to D.C. Cook and Waterford

• SI, Accumulator and RHR Boundaries go to first RCS Pressure Isolation Valve (D.C. Cook) - Reduced Scope Compared to Supporting WCAPs

• Entire Pressurizer Surge Line (Waterford) 5

LBB Evaluation Method Westinghouse Evaluation Methods Using NUREG-0800 Standard Review Plan (SRP) Section 3.6.3 Criteria

• Loads calculated for as-built configuration and combined per SRP 3.6.3

• Plant-Specific Material Properties

• Leakage Crack Flow Rate with Margin of 10 to Leak Detection

• Fracture Mechanics Evaluation of Critical Crack Size with Margin of 2 from Leakage Flaw to Critical Flaw

• Additional Fatigue Crack Growth Evaluations

• Similar to Previously Approved Approaches 6

Screening Potential Degradation Mechanisms LAR WCAP Evaluations Plus Plant-Specific Reviews

• No Mechanisms Challenge LBB Conclusions

• ISI Examination Results Reviewed for In-Scope Piping

• No Relevant Indications

• Plant-Specific Reviews for Water Hammer and External Chloride Stress Corrosion Cracking (ECSCC)

• Water Hammer Generic Letter 2008-01 Actions and OE

• Potential ECSCC from Service Water Leaks

• LBB piping not susceptible based on location

• ECSCC is a mechanism considered in Risk-Informed ISI Program - LAR discusses exam results 7

RCS Leakage Detection

• 6-inch SI Leakage Crack Flow Rate = 5 gpm 0.5 gpm Leakage Detection

• R-11A Air Particulate Monitor

• Preliminary Evaluation Using Fluorine-18 Shows Capability to Detect 0.5 gpm in One Hour

• F-18 is Rx Power Dependent, not Relying on Fuel Defects or Corrosion Products

• Current Setpoints and Alarm Response are Not Affected

• Containment Fan Cooler Condensate Detector Response 0.5 gpm in One Hour 8

RCS Leakage Detection Discussion of Other RCS Leakage Capabilities

• Containment Sump Pump Stops and Starts

• Noble Gas Radiation Monitor

• Non-Tech Spec Parameters e.g., containment conditions, accumulator level and pressure, other tank levels

• Performance of Water Inventory Balance

• Leakage Monitoring and Evaluation per Inspection Manual Chapter 2515 Appendix D and Owners Group Guidance 9

RCS Leakage Detection

• Diverse Means to Detect and Evaluate Low Levels of Leakage

• Fatigue Crack Growth Evaluations for Limiting Piping (6-inch SI) Calculated Nearly Four Years to go from 10 gpm to Critical Crack

• No Change Proposed to Current Technical Specification Limit of One gpm Unidentified Leakage 10

Proposed Schedule

• PSEG to Submit LAR in April 2020

• Approval Needed for Unit 2 Fall 2021 Outage 11