ML18305B058
| ML18305B058 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 11/05/2018 |
| From: | Susquehanna, Talen Energy |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| Download: ML18305B058 (8) | |
Text
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 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 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 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and 7 daysExtension would expire in 2026 for Unit 2 and 2027 for Unit 1© Talen Energy8