ML15238B865
| ML15238B865 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 09/03/2015 |
| From: | Willingham M NRC/NRO/DSEA/RHMB |
| To: | |
| Shared Package | |
| ML15239B210 | List: |
| References | |
| TAC MF3721 | |
| Download: ML15238B865 (2) | |
Text
Davis-Besse, Unit 1 Table 1. Current Design Basis Flood Hazards for Use in the MSA Mechanism Stillwater Elevation Waves/
Runup Reference Design Basis Hazard Elevation Note: Reported values are rounded to the nearest one-tenth of a foot.
Local Intense Precipitation LIP - Turbine Building 584.5 ft IGLD55 Minimal 584.5 ft IGLD55 FHRR Section 2.1.1 Failure of Dams and Onsite Water Control/Storage Structures Dam Failure No Impact Identified No Impact Identified No Impact Identified FHRR Section 2.1.3 Streams and Rivers River and Streams 579.0 ft IGLD55 Not applicable 579.0 ft IGLD55 FHRR Section 2.1.2 Storm Surge Storm Surge 583.7 ft IGLD55 6.6 ft 590.3 ft IGLD55 FHRR Section 2.1.4 FHRR Section 2.1.8 Seiche Seiche Not included in DB Not included in DB Not included in DB FHRR Table 3 Tsunami Not included in DB Not included in DB Not included in DB FHRR Table 3 Ice-Induced Flooding No Impact Identified No Impact Identified No Impact Identified FHRR Table 3 Channel Migrations/Diversions No Impact Identified No Impact Identified No Impact Identified FHRR Table 3
Davis-Besse, Unit 1 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Elevation Waves/
Runup Reevaluated Hazard Elevation Reference 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.
Local Intense Precipitation 585.5 ft IGLD55 Minimal 585.5 ft IGLD55 FHRR Section 3.8 Turbine Building 585.5 ft IGLD55 Minimal 585.5 ft IGLD55 FHRR Section 3.8 Intake Structure 585.4 ft IGLD55 Minimal 585.4 ft IGLD55 FHRR Table 1 Auxiliary Buildings Storm Surge 585.8 ft IGLD55 0.1 ft 585.9 ft IGLD55 FHRR Section 3.7.4 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.