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{{#Wiki_filter: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
{{#Wiki_filter:Columbia Generating Station Table 1. Current Design Basis Flood Hazards for Use in the MSA1 Mechanism              Stillwater      Waves/       Design Basis      Reference Elevation        Runup             Hazard Elevation Local Intense Precipitation Not included  Not included      Not included   FHRR Table 3 in DB          in DB              in DB Streams and Rivers Columbia River2 390.0 ft MSL     Minimal        390.0 ft MSL  FHRR Table 3 Local Drainage (Combined Effect) 431.1 ft MSL      2.2 ft         433.3 ft MSL  FHRR Table 3 Failure of Dams and Onsite Water Control/Storage Structures2 Combined Effect                422.0 ft MSL     2 ft            424.0 ft MSL    FHRR Table 3 Storm Surge No Impact      No Impact          No Impact     FHRR Table 3 on the Site   on the Site       on the Site Identified    Identified        Identified Seiche No Impact      No Impact          No Impact    FHRR Table 3 on the Site   on the Site       on the Site Identified    Identified        Identified Tsunami No Impact      No Impact          No Impact    FHRR Table 3 on the Site   on the Site       on the Site Identified    Identified        Identified Ice-Induced Flooding No Impact     No Impact         No Impact     FHRR Table 3 on the Site    on the Site       on the Site Identified    Identified        Identified
: 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}}
Columbia Generating Station Table 1. Current Design Basis Flood Hazards for Use in the MSA1 Mechanism                Stillwater        Waves/        Design Basis                Reference Elevation        Runup              Hazard Elevation Channel Migrations/Diversions No Impact      No Impact          No Impact            FHRR Table 3 on the SIte    on the Site      on the Site Identified      Identified        Identified Note 1: Reported values are rounded to the nearest one-tenth of a foot.
Note 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.
 
Columbia Generating Station Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism              Stillwater      Waves/          Reevaluated    Reference Elevation        Runup              Hazard Elevation Local Intense Precipitation High point near Radwaste          441.2 ft MSL        Minimal      441.2 ft MSL FHRR Table 1 Building truck ramp DG Building Exterior Door (DG2)  440.9 ft MSL        Minimal      440.9 ft MSL FHRR Table 1 DG Building Exterior Door (DG1)  440.9 ft MSL        Minimal      440.9 ft MSL FHRR Table 1 DG Building Exterior Door        440.9 ft MSL        Minimal      440.9 ft MSL FHRR Table 1 (HPCS DG)
Reactor Building railroad bay    441.1 ft MSL        Minimal      441.1 ft MSL FHRR Table 1 door Service Water B pump house       441.0 ft MSL        Minimal      441.0 ft MSL FHRR Table 1 personnel door Service Water B spray pond wall  435.2 ft MSL        Minimal      435.2 ft MSL FHRR Table 1 Service Water A pump house       439.0 ft MSL        Minimal      439.0 ft MSL FHRR Table 1 personnel door Service Water A spray pond wall  435.1 ft MSL        Minimal      435.1 ft MSL FHRR Table 1 Roof drain (storm sewer) header   440.3 ft MSL        Minimal      440.3 ft MSL FHRR Table 1 manhole MH-S5 Vehicle Barrier System high point 438.0 ft MSL        Minimal      438.0 ft MSL FHRR Table 1
 
Columbia Generating Station Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism            Stillwater      Waves/         Reevaluated    Reference Elevation        Runup              Hazard Elevation Benchmark infront of TSC        440.6 ft MSL        Minimal      440.6 ft MSL FHRR Table 1 entrance Benchmark in by NW remote air    441.0 ft MSL        Minimal      441.0 ft MSL FHRR Table 1 intake Benchmark infront of GSB        440.9 ft MSL        Minimal      440.9 ft MSL FHRR Table 1 entrance Benchmark infront of Building 88 440.6 ft MSL        Minimal      440.6 ft MSL FHRR Table 1 North Side of Flex Building 82  440.6 ft MSL        Minimal      440.6 ft MSL FHRR Table 1 North Side of Flex Building 600  437.8 ft MSL        Minimal      437.8 ft MSL FHRR Table 1 South Side of Flex Building 600  438.0 ft MSL        Minimal      438.0 ft MSL FHRR Table 1 ISFSI Pad (North)                443.3 ft MSL        Minimal      443.3 ft MSL FHRR Table 1 ISFSI Pad (South)               443.3 ft MSL        Minimal      443.3 ft MSL FHRR Table 1 Facilities Fuel Station          440.6 ft MSL        Minimal      440.6 ft MSL FHRR Table 1 Diesel Generator Tank Access    442.1 ft MSL        Minimal      442.1 ft MSL FHRR Table 1 Flex Gasoline Storgae Module    440.8 ft MSL        Minimal      440.8 ft MSL FHRR Table 1
 
Columbia Generating Station Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism              Stillwater        Waves/         Reevaluated            Reference Elevation        Runup              Hazard Elevation Streams and Rivers Local Drainage                    432.0 ft MSL        Minimal      432.0 ft MSL        FHRR Table 3 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.}}

Latest revision as of 12:36, 30 October 2019

Current Design Basis Flood Hazards for Use in the MSA
ML16333A094
Person / Time
Site: Columbia Energy Northwest icon.png
Issue date: 12/07/2016
From: Willingham M
NRC/NRO/DSEA/RHMB
To:
Willingham M
Shared Package
ML16337A111 List:
References
CAC MF3039
Download: ML16333A094 (5)
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Text

Columbia Generating Station Table 1. Current Design Basis Flood Hazards for Use in the MSA1 Mechanism Stillwater Waves/ Design Basis Reference Elevation Runup Hazard Elevation Local Intense Precipitation Not included Not included Not included FHRR Table 3 in DB in DB in DB Streams and Rivers Columbia River2 390.0 ft MSL Minimal 390.0 ft MSL FHRR Table 3 Local Drainage (Combined Effect) 431.1 ft MSL 2.2 ft 433.3 ft MSL FHRR Table 3 Failure of Dams and Onsite Water Control/Storage Structures2 Combined Effect 422.0 ft MSL 2 ft 424.0 ft MSL FHRR Table 3 Storm Surge No Impact No Impact No Impact FHRR Table 3 on the Site on the Site on the Site Identified Identified Identified Seiche No Impact No Impact No Impact FHRR Table 3 on the Site on the Site on the Site Identified Identified Identified Tsunami No Impact No Impact No Impact FHRR Table 3 on the Site on the Site on the Site Identified Identified Identified Ice-Induced Flooding No Impact No Impact No Impact FHRR Table 3 on the Site on the Site on the Site Identified Identified Identified

Columbia Generating Station Table 1. Current Design Basis Flood Hazards for Use in the MSA1 Mechanism Stillwater Waves/ Design Basis Reference Elevation Runup Hazard Elevation Channel Migrations/Diversions No Impact No Impact No Impact FHRR Table 3 on the SIte on the Site on the Site Identified Identified Identified Note 1: Reported values are rounded to the nearest one-tenth of a foot.

Note 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.

Columbia Generating Station Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Local Intense Precipitation High point near Radwaste 441.2 ft MSL Minimal 441.2 ft MSL FHRR Table 1 Building truck ramp DG Building Exterior Door (DG2) 440.9 ft MSL Minimal 440.9 ft MSL FHRR Table 1 DG Building Exterior Door (DG1) 440.9 ft MSL Minimal 440.9 ft MSL FHRR Table 1 DG Building Exterior Door 440.9 ft MSL Minimal 440.9 ft MSL FHRR Table 1 (HPCS DG)

Reactor Building railroad bay 441.1 ft MSL Minimal 441.1 ft MSL FHRR Table 1 door Service Water B pump house 441.0 ft MSL Minimal 441.0 ft MSL FHRR Table 1 personnel door Service Water B spray pond wall 435.2 ft MSL Minimal 435.2 ft MSL FHRR Table 1 Service Water A pump house 439.0 ft MSL Minimal 439.0 ft MSL FHRR Table 1 personnel door Service Water A spray pond wall 435.1 ft MSL Minimal 435.1 ft MSL FHRR Table 1 Roof drain (storm sewer) header 440.3 ft MSL Minimal 440.3 ft MSL FHRR Table 1 manhole MH-S5 Vehicle Barrier System high point 438.0 ft MSL Minimal 438.0 ft MSL FHRR Table 1

Columbia Generating Station Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Benchmark infront of TSC 440.6 ft MSL Minimal 440.6 ft MSL FHRR Table 1 entrance Benchmark in by NW remote air 441.0 ft MSL Minimal 441.0 ft MSL FHRR Table 1 intake Benchmark infront of GSB 440.9 ft MSL Minimal 440.9 ft MSL FHRR Table 1 entrance Benchmark infront of Building 88 440.6 ft MSL Minimal 440.6 ft MSL FHRR Table 1 North Side of Flex Building 82 440.6 ft MSL Minimal 440.6 ft MSL FHRR Table 1 North Side of Flex Building 600 437.8 ft MSL Minimal 437.8 ft MSL FHRR Table 1 South Side of Flex Building 600 438.0 ft MSL Minimal 438.0 ft MSL FHRR Table 1 ISFSI Pad (North) 443.3 ft MSL Minimal 443.3 ft MSL FHRR Table 1 ISFSI Pad (South) 443.3 ft MSL Minimal 443.3 ft MSL FHRR Table 1 Facilities Fuel Station 440.6 ft MSL Minimal 440.6 ft MSL FHRR Table 1 Diesel Generator Tank Access 442.1 ft MSL Minimal 442.1 ft MSL FHRR Table 1 Flex Gasoline Storgae Module 440.8 ft MSL Minimal 440.8 ft MSL FHRR Table 1

Columbia Generating Station Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Streams and Rivers Local Drainage 432.0 ft MSL Minimal 432.0 ft MSL FHRR Table 3 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.

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