ML15238B865
| ML15238B865 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 09/03/2015 |
| From: | Willingham M H NRC/NRO/DSEA/RHMB |
| To: | |
| Shared Package | |
| ML15239B210 | List: |
| References | |
| TAC MF3721 | |
| Download: ML15238B865 (2) | |
Text
Davis-Besse, Unit 1Table 1. Current Design Basis Flood Hazards for Use in the MSAMechanismStillwater Elevation Waves/ RunupReferenceDesign Basis Hazard ElevationNote: Reported values are rounded to the nearest one-tenth of a foot.Local Intense PrecipitationLIP - Turbine Building584.5 ft IGLD55Minimal584.5 ft IGLD55FHRR Section 2.1.1Failure of Dams and Onsite Water Control/Storage StructuresDam FailureNo Impact IdentifiedNo Impact IdentifiedNo Impact IdentifiedFHRR Section 2.1.3Streams and RiversRiver and Streams579.0 ft IGLD55Not applicable579.0 ft IGLD55FHRR Section 2.1.2Storm SurgeStorm Surge583.7 ft IGLD556.6 ft590.3 ft IGLD55FHRR Section 2.1.4FHRR Section 2.1.8SeicheSeicheNot included in DBNot included in DBNot included in DBFHRR Table 3TsunamiNot included in DBNot included in DBNot included in DBFHRR Table 3Ice-Induced FloodingNo Impact IdentifiedNo Impact IdentifiedNo Impact IdentifiedFHRR Table 3Channel Migrations/DiversionsNo Impact IdentifiedNo Impact IdentifiedNo Impact IdentifiedFHRR Table 3 Davis-Besse, Unit 1Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSAMechanismStillwater Elevation Waves/ RunupReevaluated Hazard ElevationReferenceNote 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 Precipitation585.5 ft IGLD55585.5 ft IGLD55FHRR Section 3.8Turbine Building585.5 ft IGLD55585.5 ft IGLD55FHRR Section 3.8Intake Structure585.4 ft IGLD55585.4 ft IGLD55FHRR Table 1Auxiliary BuildingsStorm Surge 585.8 ft IGLD55585.9 ft IGLD55FHRR Section 3.7.4Note 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.