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, 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

AGENDA

• Introductions

• Current Status

• Compensatory Measures

• Resolution Strategy

• Conclusion 2

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 3

CURRENT 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 Station implemented enforcement discretion guidance documents EGM 15-002 and DSS-ISG-2016-01

• 4 4

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)

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

• 5 5

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)

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

• 6 6

RESOLUTION STRATEGY

• Site-specific High Winds PRA

- Industry leader

- Developed in 2013 Updated to reflect as-built/as-operated plant Site-specific High Winds PRA is peer-reviewed to ASME Standard and Regulatory Guide 1.200, Revision 2

• 7 7

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

• 8 8