ML15230A236

Tables 1 and 2

ML15230A236
Person / Time
Site:	Braidwood
Issue date:	09/03/2015
From:	Chaput P NRC/NRO/DSEA/RHMB
To:
Chaput P
Shared Package
ML15230A523	List: ML15230A236
References
Download: ML15230A236 (3)

Text

Braidwood Station, Units 1 and 2 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 601.9 ft MSL Not 601.9 ft MSL FHRR Section 2.2.2 applicable Streams and Rivers PMF on Mazon River 582.0 ft MSL 2.0 ft 584.0 ft MSL FHRR Section 2.2.2 PMF on Cooling Pond 598.2 ft MSL 4.1 ft 602.3 ft MSL FHRR Section 2.2.4 Failure of Dams and Onsite Water Control/Storage Structures No impact on No impact on No impact on the site the site the site FHRR Section 2.2.3 identified identified identified Storm Surge No impact on No impact on No impact on the site the site the site FHRR Section 2.2.5 identified identified identified Seiche No impact on No impact on No impact on the site the site the site FHRR Section 2.2.5 identified identified identified Tsunami No impact on No impact on No impact on the site the site the site FHRR Section 2.2.6 identified identified identified Ice-Induced Flooding Ice jam flooding - Near Intake 555.0 ft MSL Not 555.0 ft MSL FHRR Section 2.2.7 applicable

Braidwood Station, Units 1 and 2 Table 1. Current Design Basis Flood Hazards for Use in the MSA Mechanism Stillwater Waves/ Design Basis Reference Elevation Runup Hazard Elevation Channel Migrations/Diversions No impact on No impact on No impact on the site the site the site FHRR Section 2.2.8 identified identified identified Note: Reported values are rounded to the nearest one-tenth of a foot.

Braidwood Station, Units 1 and 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Streams and Rivers PMF on Cooling Pond 599.4 ft MSL 2.5 ft 601.9 ft MSL FHRR Table 4.4 PMF on Mazon River 594.3 ft MSL 1.5 ft 595.8 ft MSL FHRR Table 4.3 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.

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.