ML15243A447
| ML15243A447 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 09/10/2015 |
| From: | Quinn-Willingham L NRC/NRO/DSEA/RHMB |
| To: | |
| Quinn-Willingham L | |
| Shared Package | |
| ML15244B266 | List: |
| References | |
| TAC MF3790, TAC MF3791 | |
| Download: ML15243A447 (3) | |
Text
Salem, Units 1 and 2 Table 1. Current Design Basis Flood Hazards for Use in the MSA 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 Section 1.2.1 Failure of Dams and Onsite Water Control/Storage Structures Not included in DB Not included in DB Not included in DB FHRR Section 1.2.3 Streams and Rivers Not included in DB Not included in DB Not included in DB FHRR Section 1.2.2 Storm Surge Auxiliary Building 24.0 ft NAVD88 6.6 ft 30.6 ft NAVD88 FHRR Section 1.2.4 Service Water Intake Structure 24.0 ft NAVD88 13.5 ft 37.5 ft NAVD88 FHRR Section 1.2.4 and Table 3-1 Seiche No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Section 1.2.5 Tsunami No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Section 1.2.6 Ice-Induced Flooding No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Section 1.2.7
Salem, Units 1 and 2 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.
Channel Migrations/Diversions No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Section 1.2.8 Note 2: Based on the NRC staffs independent (deterministic) hazard assessment using present-day regulatory guidance and methodologies of storm surge, the staff concludes that the sites current design basis remains bounded. For this reason, the staff concludes it is appropriate to utilize the current design basis storm surge elevation in conjunction with the mitigating strategies assessment.
Salem, Units 1 and 2 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 12.2 ft NAVD88 Minimal 12.2 ft NAVD88 FHRR Section 3.1 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.