ML15219A661
| ML15219A661 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 09/03/2015 |
| From: | Japan Lessons-Learned Division |
| To: | Exelon Generation Co, Exelon Nuclear |
| Chaput P | |
| References | |
| TAC MF3655, TAC MF3656 | |
| Download: ML15219A661 (4) | |
Text
LaSalle, Units 1 & 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 LIP Zone 1 (North portion of site) 710.1 ft MSL Not applicable 710.1 ft MSL FHRR Section 2.2.1 LIP Zone 2 (South portion of site) 710.3 ft MSL Not applicable 710.3 ft MSL FHRR Section 2.2.1 Failure of Dams and Onsite Water Control/Storage Structures No impact on the site identified No impact on the site identified No impact on the site identified FHRR Section 2.2.3 Streams and Rivers Riverine 521.8 ft MSL 0.7 ft 522.5 ft MSL USFAR Revision 19 Section 2.4.3 FHRR Section 2.2.2 Storm Surge PMF on Lake at Dike 704.3 ft MSL 2.9 ft 707.2 ft MSL FHRR Section 2.2.4 PMF on Cooling Lake at Plant 704.3 ft MSL 1.3 ft 705.6 ft MSL FHRR Section 2.2.4 PMF on Cooling Lake at Lake Screen House 704.3 ft MSL 1.8 ft 706.1 ft MSL FHRR Section 2.2.4 Seiche Not included in DB Not included in DB Not included in DB FHRR Section 2.2.5 Tsunami Not included in DB Not included in DB Not included in DB FHRR Section 2.2.6
LaSalle, Units 1 & 2 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.
Ice-Induced Flooding No impact on the site identified No impact on the site identified No impact on the site identified FHRR Section 2.2.7 Channel Migrations/Diversions No impact on the site identified No impact on the site identified No impact on the site identified FHRR Section 2.2.8
LaSalle, Units 1 & 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 710.8 MSL Minimal 710.8 MSL FHRR Section 3.1 LIP for entire site Storm Surge 701.0 MSL 9.6 ft 710.6 MSL FHRR Section 3.4.4 Lake screen house 701.0 MSL 11.0 ft 712.0 MSL FHRR Section 3.4.4 Inlet structure 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.