ML15240A362

Master Report - Tables 1 and 2

ML15240A362
Person / Time
Site:	Palo Verde, Yankee Rowe
Issue date:	09/28/2015
From:	Quinn-Willingham L NRC/NRO/DSEA/RHMB
To:
Quinn-Willingham L
Shared Package
ML15268A417	List: ML15240A362
References
TAC MF5546, TAC MF5547, TAC MF5548
Download: ML15240A362 (3)

Text

Palo Verde - Units 1, 2, & 3 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 Unit 1 955.5 ft Minimal 955.5 ft FHRR Section 2.2.1 NGVD29 NGVD29 Unit 2 952.5 ft Minimal 952.5 ft FHRR Section 2.2.1 NGVD29 NGVD29 Unit 3 949.5 ft Minimal 949.5 ft FHRR Section 2.2.1 NGVD29 NGVD29 Streams and Rivers Winters Wash (at Cross Section 956.4 ft 5.6 ft 962.0 ft FHRR Section 2.2.2 AA) NGVD29 NGVD29 FHRR Table 2-2 East Wash (at Cross Section G2) 978.8 ft 4.0 ft 982.8 ft FHRR Section 2.2.2 NGVD29 NGVD29 FHRR Table 2-2 Gila River 776.0 ft Not 776.0 ft FHRR Section 2.2.2 NGVD29 applicable NGVD29 Centennial Wash 888.0 ft Not 888.0 ft FHRR Section 2.2.2 NGVD29 applicable NGVD29 Hassayampa River 942.0 ft Not 942.0 ft Email from Michael Dilorenzo, APS to NGVD29 applicable NGVD29 Juan Uribe, NRC,

Subject:

"Palo Verde Flood Hazard Reevaluation Report" (ADAMS Accession No. ML15266A226 Failure of Dams and Onsite Water Control/Storage Structures 900.0 ft Not 900.0 ft FHRR Section 2.2.3 NGVD29 applicable NGVD29

Palo Verde - Units 1, 2, & 3 Table 1. Current Design Basis Flood Hazards for Use in the MSA Mechanism Stillwater Waves/ Design Basis Reference Elevation Runup Hazard Elevation Storm Surge No Impact No Impact No Impact FHRR Section 2.2.4 on the Site on the Site on the Site Identified Identified Identified Seiche 45-Acre Reservoir 951.0 ft Not 951.0 ft FHRR Section 2.2.6 NGVD29 applicable NGVD29 85-Acre Reservoir 951.0 ft Not 951.0 ft FHRR Section 2.2.6 NGVD29 applicable NGVD29 Evaporation Ponds 937.0 ft Not 937.0 ft FHRR Section 2.2.6 NGVD29 applicable NGVD29 Tsunami No Impact No Impact No Impact FHRR Section 2.2.4 on the Site on the Site on the Site Identified Identified Identified Ice-Induced Flooding No Impact No Impact No Impact FHRR Section 2.2.4 on the Site on the Site on the Site Identified Identified Identified Channel Migrations/Diversions No Impact No Impact No Impact FHRR Section 2.2.5 on the SIte on the Site on the Site Identified Identified Identified Note 1: Reported values are rounded to the nearest one-tenth of a foot.

Palo Verde - Units 1, 2, & 3 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 Unit 1 957.7 ft Minimal 957.7 ft Staff Assessment NGVD29 NGVD29 Unit 2 955.0 ft Minimal 955.0 ft Staff Assessment NGVD29 NGVD29 Unit 3 952.4 ft Minimal 952.4 ft Staff Assessment NGVD29 NGVD29 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).

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.