ML16333A094

Current Design Basis Flood Hazards for Use in the MSA

ML16333A094
Person / Time
Site:	Columbia
Issue date:	12/07/2016
From:	Willingham M NRC/NRO/DSEA/RHMB
To:
Willingham M
Shared Package
ML16337A111	List: ML16333A094
References
CAC MF3039
Download: ML16333A094 (5)

Text

ColumbiaGeneratingStation Table 1. Current Design Basi s Flood Hazards for Use i n the MSAMechanismStillwater Elevation Waves/ Runup ReferenceDesign Basis Hazard ElevationLocal Intense PrecipitationNot included in DBNot included in DBNot included in DBFHRR Table 3Failure of Dams an d Onsite Water Control/Storage Structures422.0 ft MSL 42.0 ft MSLFHRR Table 3 Streams an d RiversColumbia River390.0 ft MSL390.0 ft MSLFHRR Table 3 Local Drainage431.1 ft MSL

43. ft MSLFHRR Table 3Storm SurgeNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Table 3 SeicheNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Table 3 TsunamiNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Table 3Ice-Induced FloodingNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Table 3 ColumbiaGeneratingStation Table 1. Current Design Basi s Flood Hazards for Use i n the MSAMechanismStillwater Elevation Waves/ Runup ReferenceDesign Basis Hazard ElevationNote 1: Reported values are rounded to the nearest one-tenth of a foot.Channel Migrations/DiversionsNo Impact on the SIte IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Table 3Note 2: These hazards remain within the Columbia River Basin, a separate sub-basin away from CGS. CGS is not exposed to these hazards due to intervening topography. This remains true for the re-evaluated hazards.

ColumbiaGeneratingStation Table 2. R eevaluated Flood Hazards fo r Flo od-Causing Mechanisms for Use in the MS AMechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation ReferenceLocal Intense Precipitation441.2 ft MSL441.2 ft MSLFHRR Table 1High point near Radwaste Building truck ramp440.9 ft MSL440.9 ft MSLFHRR Table 1DG Building Exterior Door (DG2)440.9 ft MSL440.9 ft MSLFHRR Table 1DG Building Exterior Door (DG1)440.9 ft MSL440.9 ft MSLFHRR Table 1DG Building Exterior Door (HPCS DG)441.1 ft MSL441.1 ft MSLFHRR Table 1Reactor Building railroad bay

door441.0 ft MSL441.0 ft MSLFHRR Table 1Service Water B pump house personnel door435.2 ft MSL435.2 ft MSLFHRR Table 1Service Water B spray pond wall439.0 ft MSL439.0 ft MSLFHRR Table 1Service Water A pump house personnel door435.1 ft MSL435.1 ft MSLFHRR Table 1Service Water A spray pond wall440.3 ft MSL440.3 ft MSLFHRR Table 1Roof drain (storm sewer) header manhole MH-S5438.0 ft MSL438.0 ft MSLFHRR Table 1Vehicle Barrier System high point ColumbiaGeneratingStation Table 2. R eevaluated Flood Hazards fo r Flo od-Causing Mechanisms for Use in the MS AMechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation Reference440.6 ft MSL440.6 ft MSLFHRR Table 1Benchmark infront of TSC entrance441.0 ft MSL441.0 ft MSLFHRR Table 1Benchmark in by NW remote air intake440.9 ft MSL440.9 ft MSLFHRR Table 1Benchmark infront of GSB entrance440.6 ft MSL440.6 ft MSLFHRR Table 1Benchmark infront of Building 88440.6 ft MSL440.6 ft MSLFHRR Table 1North Side of Flex Building 82437.8 ft MSL437.8 ft MSLFHRR Table 1North Side of Flex Building 600438.0 ft MSL438.0 ft MSLFHRR Table 1South Side of Flex Building 600443.3 ft MSL443.3 ft MSLFHRR Table 1ISFSI Pad (North)443.3 ft MSL443.3 ft MSLFHRR Table 1ISFSI Pad (South)440.6 ft MSL440.6 ft MSLFHRR Table 1Facilities Fuel Station442.1 ft MSL442.1 ft MSLFHRR Table 1Diesel Generator Tank Access440.8 ft MSL440.8 ft MSLFHRR Table 1Flex Gasoline Storgae Module ColumbiaGeneratingStation Table 2. R eevaluated Flood Hazards fo r Flo od-Causing Mechanisms for Use in the MS AMechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation Reference Note 1: Note 2: Reported values a re rounded to the nearest o ne-tenth of a foot.Streams and Rivers432.0 ft MSL432.0 ft MSLFHRR Table 3 Local Drainage