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{{#Wiki_filter:Susquehanna Steam Electric StationPre-Application MeetingNovember 5, 2018License Amendment Request for a Temporary Completion Time Extension to Support Emergency Service Water Piping Replacement Meeting PurposeDescribe a future license amendment requestEstablish a common understanding of the scope of the requestEstablish a common understanding of the scheduleObtain NRC feedback© Talen Energy2 Proposed ChangeReplacepipingintheEmergencyServiceWaterSystemTemporary extension to Completion Times in LCOs 3.7.1 and 3.7.2Increase from 72 hours and 7 days to 14 daysWork is projected to take 11 days plus contingencyExtension is necessary for the online unitOnly one subsystem of ESW/RHRSW is required for the outage unitExtension would expire in 2026 for Unit 2 and 2027 for Unit 1© Talen Energy3 Emergency Service Water SystemCommon for the two unitsTakes suction from the spray pondCools diesel generators, ECCS pumps and room coolers, and other heat exchangersESW and RHRSW share a common return line to the spray pond via spray arrays or bypass valves© Talen Energy4 RHR Service Water System2 divisions per unit shared between units(e.g., Unit 1ARHRSW pumpcanfeed Unit 2 RHR HX) Takes suction from spray pondCools RHR Heat ExchangersESW and RHRSW share a common return line to the spray pond via spray arrays or bypass valves© Talen Energy5 Location of Pipe ReplacementInitially, will replace   Unit 1, Division 1 supply and return line near the Reactor Building Isolation valvesMay replace Unit 1       Division 2 and both Divisions on Unit 2Work renders division in both RHRSW and ESW inoperable© Talen Energy6 Upcoming Refueling OutagesDivisional outages at SusquehannaTwo opportunities for each divisionAllows time to interpret results, appropriately plan and schedule subsequent replacements, and account for increased scopeYearUnit 1Unit 22020Division 12021Division 12022Division 22023Division 22024Division 12025Division 12026Division 22027Division 2© Talen Energy7 SummarySusquehanna intends to replace ESW piping in 2020Based on initial replacement and inspection, may make subsequent replacementsRequesting an extension to LCOs 3.7.1 and 3.7.2 for the online unitExtend to 14 days from 72 hours and 7 daysExtension would expire in 2026 for Unit 2 and 2027 for Unit 1© Talen Energy8}}
{{#Wiki_filter:Susquehanna Steam Electric Station License Amendment Request for a Temporary Completion Time Extension to Support Emergency Service Water Piping Replacement Pre-Application Meeting November 5, 2018
 
Meeting Purpose
* Describe a future license amendment request
* Establish a common understanding of the scope of the request
* Establish a common understanding of the schedule
* Obtain NRC feedback
© Talen Energy              2
 
Proposed Change
* Replace piping in the Emergency Service Water System
* Temporary extension to Completion Times in LCOs 3.7.1 and 3.7.2
          - Increase from 72 hours and 7 days to 14 days
          - Work is projected to take 11 days plus contingency
* Extension is necessary for the online unit
          - Only one subsystem of ESW/RHRSW is required for the outage unit
* Extension would expire in 2026 for Unit 2 and 2027 for Unit 1
© Talen Energy                          3
 
Emergency Service Water System
* Common for the two units
* Takes suction from the spray pond
* Cools diesel generators, ECCS pumps and room coolers, and other heat exchangers
* ESW and RHRSW share a common return line to the spray pond via spray arrays or bypass valves
© Talen Energy                  4
 
RHR Service Water System
* 2 divisions per unit shared between units
      - (e.g., Unit 1 A RHRSW pump can feed Unit 2 RHR HX)
* Takes suction from spray pond
* Cools RHR Heat Exchangers
* ESW and RHRSW share a common return line to the spray pond via spray arrays or bypass valves
© Talen Energy                      5
 
Location of Pipe Replacement
* Initially, will replace Unit 1, Division 1 supply and return line near the Reactor Building Isolation valves
* May replace Unit 1 Division 2 and both Divisions on Unit 2
* Work renders division in both RHRSW and ESW inoperable
© Talen Energy                  6
 
Upcoming Refueling Outages
* Divisional outages at               Year  Unit 1    Unit 2 Susquehanna                  2020  Division 1 2021            Division 1 2022  Division 2
* Two opportunities for each 2023            Division 2 division 2024  Division 1 2025            Division 1
* Allows time to interpret results, 2026  Division 2 appropriately plan and       2027            Division 2 schedule subsequent replacements, and account for increased scope
© Talen Energy                  7
 
Summary
* Susquehanna intends to replace ESW piping in 2020
          - Based on initial replacement and inspection, may make subsequent replacements
* Requesting an extension to LCOs 3.7.1 and 3.7.2 for the online unit
          - Extend to 14 days from 72 hours and 7 days
* Extension would expire in 2026 for Unit 2 and 2027 for Unit 1
© Talen Energy                      8}}

Revision as of 11:22, 20 October 2019

Emergency Service Water Piping Replacement LAR - NRC Pre-Application Meeting
ML18305B058
Person / Time
Site: Susquehanna  Talen Energy icon.png
Issue date: 11/05/2018
From:
Susquehanna, Talen Energy
To:
Office of Nuclear Reactor Regulation
References
Download: ML18305B058 (8)
v • d • e


Text

Susquehanna Steam Electric Station License Amendment Request for a Temporary Completion Time Extension to Support Emergency Service Water Piping Replacement Pre-Application Meeting November 5, 2018

Meeting Purpose

  • Describe a future license amendment request
  • Establish a common understanding of the scope of the request
  • Establish a common understanding of the schedule
  • Obtain NRC feedback

© Talen Energy 2

Proposed Change

  • Temporary extension to Completion Times in LCOs 3.7.1 and 3.7.2

- Increase from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and 7 days to 14 days

- Work is projected to take 11 days plus contingency

  • Extension is necessary for the online unit

- Only one subsystem of ESW/RHRSW is required for the outage unit

  • Extension would expire in 2026 for Unit 2 and 2027 for Unit 1

© Talen Energy 3

Emergency Service Water System

  • Common for the two units
  • Cools diesel generators, ECCS pumps and room coolers, and other heat exchangers
  • ESW and RHRSW share a common return line to the spray pond via spray arrays or bypass valves

© Talen Energy 4

RHR Service Water System

  • 2 divisions per unit shared between units

- (e.g., Unit 1 A RHRSW pump can feed Unit 2 RHR HX)

  • Cools RHR Heat Exchangers
  • ESW and RHRSW share a common return line to the spray pond via spray arrays or bypass valves

© Talen Energy 5

Location of Pipe Replacement

  • Initially, will replace Unit 1, Division 1 supply and return line near the Reactor Building Isolation valves
  • May replace Unit 1 Division 2 and both Divisions on Unit 2

© Talen Energy 6

Upcoming Refueling Outages

  • Divisional outages at Year Unit 1 Unit 2 Susquehanna 2020 Division 1 2021 Division 1 2022 Division 2
  • Two opportunities for each 2023 Division 2 division 2024 Division 1 2025 Division 1
  • Allows time to interpret results, 2026 Division 2 appropriately plan and 2027 Division 2 schedule subsequent replacements, and account for increased scope

© Talen Energy 7

Summary

  • Susquehanna intends to replace ESW piping in 2020

- Based on initial replacement and inspection, may make subsequent replacements

  • Requesting an extension to LCOs 3.7.1 and 3.7.2 for the online unit

- Extend to 14 days from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and 7 days

  • Extension would expire in 2026 for Unit 2 and 2027 for Unit 1

© Talen Energy 8

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