ML16327A530

Enclosure 1 - Mitigating Strategies Flood Hazard Information Tables for Interim Staff Response (Redacted Version)

ML16327A530
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/02/2016
From:	Robert Bernardo Japan Lessons-Learned Division
To:	Entergy Operations
Bernardo R, NRR/JLD, 415-2621
Shared Package
ML16327A482	List: ML16327A494 ML16327A530
References
CAC MF8379, CAC MF8380
Download: ML16327A530 (4)

Text

Arkansas Nuclear One, Units 1 & 2 Table 1. Current Design Basis Flood Hazards for Use in the MSA Mechanism Stillwater Waves/ Design Basis Reference Elevation Runup Hazard Elevation Local Intense Precipitation Not included Not included Not included FHRR Table 4-1 in DB in DB in DB Streams and Rivers PMF on Arkansas River 358.0 ft, 10.0 ft 368.0 ft, FHRR Table 4-1 NGVD29 NGVD29

[REDACTED] [REDACTED] [REDACTED] [REDACTED] [REDACTED]

Failure of Dams and Onsite Water Control/Storage Structures Not included Not included Not included FHRR Table 4-1 in DB in DB in DB Storm Surge Not included Not included Not included FHRR Table 4-1 in DB in DB in DB Seiche Not included Not included Not included FHRR Table 4-1 in DB in DB in DB Tsunami Not included Not included Not included FHRR Table 4-1 in DB in DB in DB Ice-Induced Flooding Not included Not included Not included FHRR Table 4-1 in DB in DB in DB

Arkansas Nuclear One, Units 1 & 2 Table 1. Current Design Basis Flood Hazards for Use in the MSA Mechanism Stillwater Waves/ Design Basis Reference Elevation Runup Hazard Elevation Channel Migrations/Diversions Not included Not included Not included FHRR Table 4-1 in DB in DB in DB Note 1: Reported values are rounded to the nearest one-tenth of a foot.

Arkansas Nuclear One, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Local Intense Precipitation North Train Bay Door 354.4 ft, Minimal 354.4 ft, FHRR Table 4-2 NGVD29 NGVD29 South Train Bay Door 354.4 ft, Minimal 354.4 ft, FHRR Table 4-2 NGVD29 NGVD29 Between Warehouse and 355.0 ft, Minimal 355.0 ft, FHRR Table 4-2 Reactor Building Unit 2 NGVD29 NGVD29 West of Maintenance Building 353.7 ft, Minimal 353.7 ft, FHRR Table 4-2 NGVD29 NGVD29 North of Turbine Building Unit 2 353.7 ft, Minimal 353.7 ft, FHRR Table 4-2 NGVD29 NGVD29 South of Turbine Building Unit 2 355.1 ft, Minimal 355.1 ft, FHRR Table 4-2 NGVD29 NGVD29 South of Central Support Building 354.0 ft, Minimal 354.0 ft, FHRR Table 4-2 NGVD29 NGVD29 North of Central Support Building 357.7 ft, Minimal 357.7 ft, FHRR Table 4-2 NGVD29 NGVD29 Northeast of Turbine Building 354.4 ft, Minimal 354.4 ft, FHRR Table 4-2 Unit 2 NGVD29 NGVD29 Transformer Yard 354.4 ft, Minimal 354.4 ft, FHRR Table 4-2 NGVD29 NGVD29 East of Turbine Building Unit 1 354.3 ft, Minimal 354.3 ft, FHRR Table 4-2 NGVD29 NGVD29

Arkansas Nuclear One, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Northwest of Intake Structure 354.1 ft, Minimal 354.1 ft, FHRR Table 4-2 NGVD29 NGVD29 North of Intake Structure 354.2 ft, Minimal 354.2 ft, FHRR Table 4-2 NGVD29 NGVD29 North of ISFSI 356.3 ft, Minimal 356.3 ft, FHRR Table 4-2 NGVD29 NGVD29 South of ISFSI 355.6 ft, Minimal 355.6 ft, FHRR Table 4-2 NGVD29 NGVD29 East of Cooling Tower 351.4 ft, Minimal 351.4 ft, FHRR Table 4-2 NGVD29 NGVD29 West of Warehouse 351.2 ft, Minimal 351.2 ft, FHRR Table 4-2 NGVD29 NGVD29 South of Warehouse 351.4 ft, Minimal 351.4 ft, FHRR Table 4-2 NGVD29 NGVD29 West of Diesel Oil Storage Tank 354.5 ft, Minimal 354.5 ft, FHRR Table 4-2 NGVD29 NGVD29 West of Engineering/Modification 352.2 ft, Minimal 352.2 ft, FHRR Table 4-2 Building NGVD29 NGVD29 Between 352.7 ft, Minimal 352.7 ft, FHRR Table 4-2 Engineering/Modification Building NGVD29 NGVD29 and Reactor Building 1 East of Diesel Fuel Storage Vault 353.7 ft, Minimal 353.7 ft, FHRR Table 4-2 NGVD29 NGVD29 Note 1: Reevaluated hazard mechanisms bounded by the current design basis (see Table 1) are not included in this table Note 2: Reported values are rounded to the nearest one-tenth of a foot.