ML15238B723
| ML15238B723 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 08/26/2015 |
| From: | Nebiyu Tiruneh, Willingham M NRC/NRO/DSEA/RHMB |
| To: | |
| Willingham M | |
| References | |
| Download: ML15238B723 (2) | |
Text
Oconee, Units 1, 2, & 3 Table 1. Current Design Basis Flood Hazards for Use in the MSA Mechanism Stillwater Elevation Waves/
Runup Reference Design Basis Hazard Elevation Note 1: Reported values are rounded to the nearest one-tenth of a foot.
Local Intense Precipitation Not included in DB Not included in DB Not included in DB Staff Assessment Failure of Dams and Onsite Water Control/Storage Structures Not included in DB Not included in DB Not included in DB Staff Assessment Streams and Rivers Flooding in Reservoirs - Keowee Reservoir (not calculated at Power Block) 808.0 ft MSL Not applicable 808.0 ft MSL Staff Assessment Storm Surge Not included in DB Not included in DB Not included in DB Staff Assessment Seiche Not included in DB Not included in DB Not included in DB Staff Assessment Tsunami Not included in DB Not included in DB Not included in DB Staff Assessment Ice-Induced Flooding Not included in DB Not included in DB Not included in DB Staff Assessment Channel Migrations/Diversions Not included in DB Not included in DB Not included in DB Staff Assessment
Oconee, Units 1, 2, & 3 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 800.4 ft MSL Minimal 800.4 ft MSL FHRR Section 3.1 Streams and Rivers 808.9 ft MSL 3.3 ft 812.2 ft MSL FHRR Section 3.2 Streams and Rivers (Flooding in Reservoirs, Keowee)
Failure of Dams and Onsite Water Control/Storage Structures
[Redacted]
[Redacted]
[Redacted]
[Redacted]
[Redacted]
Note 1: The licensee is expected to develop flood event duration parameters and applicable flood associated effects to conduct the MSA consistent with the guidance. The NRC staff has reviewed information related to flood event duration parameters (including warning time and period of inundation).
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