ML18108A015

NextEra Approach to Resolution of Tornado Missile Protection May 1, 2018

ML18108A015
Person / Time
Site:	Point Beach
Issue date:	05/01/2018
From:	Point Beach
To:	Division of Operating Reactor Licensing
Chawla M L, NRR/DORL/LPLIII, 415-8371
References
Download: ML18108A015 (8)

Text

NextEra Approach to Resolution of Tornado Missile Protection Point Beach Nuclear Plant Units 1 & 2 May 1, 2018 2 AGENDA*Introductions

• Current Status

• Compensatory Measures

• Resolution Strategy

• Conclusion 3 INTRODUCTIONS

• NRC*NextEra Point Beach Team-Steve Catron, Fleet Licensing Manager-Anil Julka, Reliability & Risk Manager

-Eric Schultz, PB Licensing Manager

-Lori Christensen, PB Licensing Project Manager

• 3 4CURRENT STATUS

• Background

• Initial Nonconformance Declaration (U1 & U2)-Turbine Driven Auxiliary Feedwater Pumps (TDAFPs) for unprotected steam supply piping

• Extent of Condition (U1 & U2)-TDAFPs for unprotected turbine exhaust stacks-Main Steam Isolation Valves, Main Steam Safety Valves, Atmospheric Dump Valves-Emergency Diesel Generator (EDG) Fuel Oil Storage Tank T-175B*4Station implemented enforcement discretion guidance documentsEGM 15-002 and DSS-ISG-2016-01 5 COMPENSATORY MEASURES

• Immediate Compensatory Measures-Per DSS-ISG-2016-01 guidance

• Comprehensive Compensatory Measures-Procedurally controlled measures-FLEX equipment sharing

• Other Discernable Changes from Original Station Design-FLEX implementation-Station modifications (design basis and beyond design basis)

• 5Compensatory measures in place; original station design improved over time and enhanced ability to mitigate a tornado missile event 6 RESOLUTION STRATEGY

• The resolution strategy is to validate that Tornado Missile is not a significant hazard for the site-LAR submittal and approval will clear nonconformances

• Options Considered for LAR Development-TMRE (Point Beach was a pilot plant)-Site-specific High Winds PRA (RG 1.200, Rev. 2)

• Selected Option -Site-specific High Winds PRA (RG 1.200, Rev. 2)

• 6License Amendment Request will screen out tornado missile as a significant hazard for the site 7 RESOLUTION STRATEGY

• Site-specific High Winds PRA-Industry leader-Developed in 2013Updated to reflect as-built/as-operated plant

• 7Site-specific High Winds PRA is peer-reviewed to ASME Standard and Regulatory Guide 1.200, Revision 2 8 CONCLUSION

• Entered Enforcement Discretion Process per EGM 2015-002

• License Amendment Request submittal based on Site-Specific High Winds PRA-Site PRA concludes Tornado Missile is below the regulatory threshold in the Standard Review Plan and screens out as a significant hazard

• Plan to submit LAR in second half of 2018

• 8License Amendment Request will screen out tornado missile as a significant hazard for the site