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{{#Wiki_filter:Davis-Besse, Unit 1 Table 1. Current Design Basis Flood Hazards for Use in the MSA Mechanism                 Stillwater       Waves/         Design Basis       Reference Elevation        Runup              Hazard Elevation Local Intense Precipitation LIP - Turbine Building               584.5 ft       Minimal             584.5 ft FHRR Section 2.1.1 IGLD55                              IGLD55 Streams and Rivers River and Streams                    579.0 ft          Not              579.0 ft  FHRR Section 2.1.2 IGLD55        applicable            IGLD55 Failure of Dams and Onsite Water Control/Storage Structures Dam Failure                         No Impact       No Impact           No Impact   FHRR Section 2.1.3 Identified    Identified          Identified Storm Surge Storm Surge                           583.7 ft         6.6 ft             590.3 ft FHRR Section 2.1.4 IGLD55                              IGLD55 FHRR Section 2.1.8 Seiche Seiche                             Not included   Not included       Not included   FHRR Table 3 in DB          in DB              in DB Tsunami Not included   Not included       Not included   FHRR Table 3 in DB          in DB              in DB Ice-Induced Flooding No Impact       No Impact           No Impact     FHRR Table 3 Identified    Identified          Identified Channel Migrations/Diversions No Impact       No Impact           No Impact     FHRR Table 3 Identified    Identified          Identified Note: Reported values are rounded to the nearest one-tenth of a foot.
{{#Wiki_filter: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       Waves/         Reevaluated                 Reference Elevation        Runup              Hazard Elevation Local Intense Precipitation Turbine Building                      585.5 ft         Minimal           585.5 ft           FHRR Section 3.8 IGLD55                              IGLD55 Intake Structure                      585.5 ft         Minimal           585.5 ft           FHRR Section 3.8 IGLD55                              IGLD55 Auxiliary Buildings                    585.4 ft         Minimal           585.4 ft             FHRR Table 1 IGLD55                              IGLD55 Storm Surge 585.8 ft           0.1 ft         585.9 ft         FHRR Section 3.7.4 IGLD55                              IGLD55 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.
Davis-Besse, Unit 1 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Elevation Waves/
Note 2: Reevaluated hazard mechanisms bounded by the current design basis (see Table 1) are not included in this table.
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.}}
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.}}

Latest revision as of 09:11, 10 January 2025

FHRR MSFHI Tables 1 and 2
ML15238B865
Person / Time
Site: Davis Besse Cleveland Electric icon.png
Issue date: 09/03/2015
From: Willingham M
NRC/NRO/DSEA/RHMB
To:
Shared Package
ML15239B210 List:
References
TAC MF3721
Download: ML15238B865 (2)
v • d • e


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.

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