ML16333A094
| ML16333A094 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| 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) | |
Text
ColumbiaGeneratingStation Table 1. Current Design Basis Flood Hazards for Use in the MSA1 Mechanism Stillwater Elevation Waves/
Runup Reference Design Basis Hazard Elevation Local Intense Precipitation Not included in DB Not included in DB Not included in DB FHRR Table 3 Failure of Dams and Onsite Water Control/Storage Structures2 Combined Effect 422.0 ft MSL 424.0 ft MSL FHRR Table 3 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 433.3 ft MSL FHRR Table 3 Storm Surge No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 3 Seiche No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 3 Tsunami No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 3 Ice-Induced Flooding No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 3 2.2 ft 2 ft
ColumbiaGeneratingStation Table 1. Current Design Basis Flood Hazards for Use in the MSA1 Mechanism Stillwater Elevation Waves/
Runup Reference Design Basis Hazard Elevation Note 1: Reported values are rounded to the nearest one-tenth of a foot.
Channel Migrations/Diversions No Impact on the SIte Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 3 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.
ColumbiaGeneratingStation Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism Stillwater Elevation Waves/
Runup Reevaluated Hazard Elevation Reference Local Intense Precipitation 441.2 ft MSL Minimal 441.2 ft MSL FHRR Table 1 High point near Radwaste Building truck ramp 440.9 ft MSL Minimal 440.9 ft MSL FHRR Table 1 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 (HPCS DG) 441.1 ft MSL Minimal 441.1 ft MSL FHRR Table 1 Reactor Building railroad bay door 441.0 ft MSL Minimal 441.0 ft MSL FHRR Table 1 Service Water B pump house personnel door 435.2 ft MSL Minimal 435.2 ft MSL FHRR Table 1 Service Water B spray pond wall 439.0 ft MSL Minimal 439.0 ft MSL FHRR Table 1 Service Water A pump house personnel door 435.1 ft MSL Minimal 435.1 ft MSL FHRR Table 1 Service Water A spray pond wall 440.3 ft MSL Minimal 440.3 ft MSL FHRR Table 1 Roof drain (storm sewer) header manhole MH-S5 438.0 ft MSL Minimal 438.0 ft MSL FHRR Table 1 Vehicle Barrier System high point
ColumbiaGeneratingStation Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism Stillwater Elevation Waves/
Runup Reevaluated Hazard Elevation Reference 440.6 ft MSL Minimal 440.6 ft MSL FHRR Table 1 Benchmark infront of TSC entrance 441.0 ft MSL Minimal 441.0 ft MSL FHRR Table 1 Benchmark in by NW remote air intake 440.9 ft MSL Minimal 440.9 ft MSL FHRR Table 1 Benchmark infront of GSB entrance 440.6 ft MSL Minimal 440.6 ft MSL FHRR Table 1 Benchmark infront of Building 88 440.6 ft MSL Minimal 440.6 ft MSL FHRR Table 1 North Side of Flex Building 82 437.8 ft MSL Minimal 437.8 ft MSL FHRR Table 1 North Side of Flex Building 600 438.0 ft MSL Minimal 438.0 ft MSL FHRR Table 1 South Side of Flex Building 600 443.3 ft MSL Minimal 443.3 ft MSL FHRR Table 1 ISFSI Pad (North) 443.3 ft MSL Minimal 443.3 ft MSL FHRR Table 1 ISFSI Pad (South) 440.6 ft MSL Minimal 440.6 ft MSL FHRR Table 1 Facilities Fuel Station 442.1 ft MSL Minimal 442.1 ft MSL FHRR Table 1 Diesel Generator Tank Access 440.8 ft MSL Minimal 440.8 ft MSL FHRR Table 1 Flex Gasoline Storgae Module
ColumbiaGeneratingStation Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA1,2 Mechanism Stillwater Elevation Waves/
Runup Reevaluated Hazard Elevation Reference 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.
Streams and Rivers 432.0 ft MSL Minimal 432.0 ft MSL FHRR Table 3 Local Drainage