ML15238B656

Public Table

ML15238B656
Person / Time
Site:	Sequoyah
Issue date:	09/03/2015
From:	Breithaupt S, Quinn-Willingham L NRC/NRO/DSEA/RHMB
To:
Quinn-Willingham L
Shared Package
ML15240A163	List: ML15238B656 ML15240A134
References
TAC MF6032, TAC MF6033
Download: ML15238B656 (3)

Text

Sequoyah, 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 705.7 ft msl Minimal 705.7 ft msl FHRR Section 3.4.1 Streams and Rivers Diesel Generator Building 722.0 ft msl 1.2 ft 723.2 ft msl FHRR Section 3.4.2 FHRR Section 3.4.8.1 ERCW Pumping Station 722.0 ft msl 4.2 ft 726.2 ft msl FHRR Section 3.4.2 FHRR Sec.tion 3.4.8.1 Failure of Dams and Onsite Water Control/Storage Structures 708.6 ft msl Not 708.6 ft msl FHRR Section 3.4.8.2 applicable Storm Surge Not included Not included Not included FHRR Section 3.4.4 in DB in DB in DB Seiche Not included Not included Not included FHRR Section 3.4.4 in DB in DB in DB Tsunami Not included Not included Not included FHRR Section 3.4.5 in DB in DB in DB Ice-Induced Flooding Not included Not included Not included FHRR Section 3.4.6 in DB in DB in DB

Sequoyah, 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 Section 3.4.7 in DB in DB in DB Note: Reported values are rounded to the nearest one-tenth of a foot.

Sequoyah, 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 706.3 ft msl Minimal 706.3 ft msl FHRR Table 11-1 Streams and Rivers

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Note 1: The licensee is expected to develop flood event duration parameters and applicable flood associated effects to conduct the MSA. The staff will evaluate the flood event duration parameters (including warning time and period of inundation) and flood associated effects during its review of the MSA.

Note 2: Reevaluated hazard mechanisms bounded by the current design basis (see Table 1) are not included in this table.

Note 3: Reported values are rounded to the nearest one-tenth of a foot.