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{{#Wiki_filter:Diablo Canyon Nuclear Power Plant, Units 1 & 2Table 1. Current Design Basis Flood Hazards for Use in the MSA MechanismStillwater Elevation Waves/ Runup Reference Design Basis Hazard Elevation Local Intense Precipitation No Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Section 2.3.2.1Failure of Dams and Onsite Water Control/Storage Structures No Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Section 2.3.2.3Streams and Rivers Diablo Creek 81.9 ft. NAVD88 Not applicable 81.9 ft. NAVD88FHRR Section 2.3.2.2Storm Surge Storm Surge No Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Section 2.3.2.4 SeicheNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Section 2.3.2.5 TsunamiDistantly-Generated Tsunamis 20.0 ft. NAVD88 10.3 ft 30.3 ft. NAVD88 FHRR Section 2.3.2.6.1FHRR Section 2.3.2.13Near-Shore Tsunamis 9.2 ft. NAVD88 25.7 ft 34.9 ft. NAVD88 FHRR Section 2.3.2.6.2FHRR Section 2.3.2.13Ice-Induced FloodingNot included in DBNot included in DBNot included in DBFHRR Section 2.3.2.7 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 1. Current Design Basis Flood Hazards for Use in the MSA MechanismStillwater Elevation Waves/ Runup Reference Design Basis Hazard ElevationNote 1: Reported values are rounded to the nearest one-tenth of a foot.Channel Migrations/Diversions Not included in DB Not included in DB Not included in DBFHRR Section 2.3.2.8 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA MechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation ReferenceLocal Intense Precipitation87.4 ft. NAVD88 Minimal87.4 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. A2.1 87.4 ft. NAVD88Minimal 87.4 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU10287.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU10387.4 ft. NAVD88 Minimal87.4 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. A3.1 87.4 ft. NAVD88Minimal 87.4 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
{{#Wiki_filter:Diablo Canyon Nuclear Power Plant, Units 1 & 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 No Impact       No Impact         No Impact         FHRR Section 2.3.2.1 on the Site     on the Site       on the Site Identified      Identified        Identified Streams and Rivers Diablo Creek                       81.9 ft.           Not             81.9 ft.       FHRR Section 2.3.2.2 NAVD88          applicable          NAVD88 Failure of Dams and Onsite Water Control/Storage Structures No Impact       No Impact         No Impact       FHRR Section 2.3.2.3 on the Site     on the Site        on the Site Identified      Identified        Identified Storm Surge Storm Surge                      No Impact        No Impact          No Impact        FHRR Section 2.3.2.4 on the Site     on the Site       on the Site Identified      Identified        Identified Seiche No Impact        No Impact          No Impact        FHRR Section 2.3.2.5 on the Site      on the Site        on the Site Identified      Identified        Identified Tsunami Distantly-Generated Tsunamis       20.0 ft.         10.3 ft           30.3 ft.       FHRR Section 2.3.2.6.1 NAVD88                              NAVD88 FHRR Section 2.3.2.13 Near-Shore Tsunamis                 9.2 ft.         25.7 ft           34.9 ft.       FHRR Section 2.3.2.6.2 NAVD88                              NAVD88 FHRR Section 2.3.2.13 Ice-Induced Flooding Not included     Not included       Not included       FHRR Section 2.3.2.7 in DB            in DB              in DB 1
A3.287.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. A3.387.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU104/587.7 ft. NAVD88 Minimal87.7 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
101-187.7 ft. NAVD88 Minimal87.7 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
Diablo Canyon Nuclear Power Plant, Units 1 & 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 Not included     Not included       Not included     FHRR Section 2.3.2.8 in DB              in DB              in DB Note 1: Reported values are rounded to the nearest one-tenth of a foot.
102-1 87.9 ft. NAVD88Minimal 87.9 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. 119-188.1 ft. NAVD88 Minimal88.1 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
2
122-1 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA MechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation Reference87.6 ft. NAVD88 Minimal87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
C1.1 87.6 ft. NAVD88Minimal 87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
Diablo Canyon Nuclear Power Plant, Units 1 & 2 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 Door/Unit No. A2.1                87.4 ft.         Minimal            87.4 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No. BU102              87.4 ft.         Minimal            87.4 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU103                87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.A3.1                87.4 ft.         Minimal            87.4 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.A3.2                87.4 ft.         Minimal            87.4 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.A3.3                87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU104/5              87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.101-1                87.7 ft.         Minimal            87.7 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.102-1                87.7 ft.         Minimal            87.7 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.119-1               87.9 ft.         Minimal            87.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.122-1                88.1 ft.         Minimal            88.1 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 1
12987.5 ft. NAVD88 Minimal87.5 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
13087.7 ft. NAVD88 Minimal87.7 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism            Stillwater        Waves/         Reevaluated              Reference Elevation          Runup              Hazard Elevation Door/Unit No.C1.1                87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.129                  87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.130                  87.5 ft.         Minimal            87.5 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.C1.2                87.7 ft.         Minimal            87.7 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU108-2             87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU105-2              87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU106-2              87.5 ft.         Minimal            87.5 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.B2.1                87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No. BU101              87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.B1.1                87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.B1.2                87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.101-2                87.8 ft.         Minimal            87.8 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 2
C1.2 87.3 ft. NAVD88Minimal 87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
BU108-287.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU105-287.5 ft. NAVD88 Minimal87.5 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU106-2 87.6 ft. NAVD88Minimal 87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism            Stillwater        Waves/         Reevaluated              Reference Elevation          Runup              Hazard Elevation Door/Unit No.102-2                87.8 ft.         Minimal            87.8 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.119-2               87.9 ft.         Minimal            87.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.122-2                88.0 ft.         Minimal            88.0 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.192-1                88.2 ft.         Minimal            88.2 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.191-1               88.0 ft.         Minimal            88.0 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.194-1                88.0 ft.         Minimal            88.0 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.192-2                88.1 ft.         Minimal            88.1 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.191-2/191A-2         88.0 ft.         Minimal            88.0 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.194-2               87.9 ft.         Minimal            87.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.363-1              117.6 ft.         Minimal          117.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.361-1              117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.360-1              117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 3
B2.187.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU10187.6 ft. NAVD88 Minimal87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. B1.1 87.6 ft. NAVD88Minimal 87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
B1.287.8 ft. NAVD88 Minimal87.8 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism                Stillwater          Waves/         Reevaluated              Reference Elevation          Runup              Hazard Elevation Door/Unit No.355-1                   117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.354-1                    117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.360-2                    117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.361-2                    117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.363-2                    117.5 ft.         Minimal          117.5 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 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.
101-2 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA MechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation Reference87.8 ft. NAVD88 Minimal87.8 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
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.
102-2 87.9 ft. NAVD88Minimal 87.9 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. 119-288.0 ft. NAVD88 Minimal88.0 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
4
122-288.2 ft. NAVD88 Minimal88.2 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
192-1 88.0 ft. NAVD88Minimal 88.0 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
Diablo Canyon Nuclear Power Plant, Units 1 & 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 No Impact       No Impact         No Impact         FHRR Section 2.3.2.1 on the Site     on the Site       on the Site Identified      Identified        Identified Streams and Rivers Diablo Creek                       81.9 ft.           Not             81.9 ft.       FHRR Section 2.3.2.2 NAVD88          applicable          NAVD88 Failure of Dams and Onsite Water Control/Storage Structures No Impact       No Impact         No Impact       FHRR Section 2.3.2.3 on the Site     on the Site       on the Site Identified      Identified        Identified Storm Surge Storm Surge                      No Impact        No Impact          No Impact        FHRR Section 2.3.2.4 on the Site      on the Site        on the Site Identified      Identified        Identified Seiche No Impact        No Impact          No Impact        FHRR Section 2.3.2.5 on the Site      on the Site        on the Site Identified      Identified        Identified Tsunami Distantly-Generated Tsunamis       20.0 ft.         10.3 ft           30.3 ft.       FHRR Section 2.3.2.6.1 NAVD88                              NAVD88 FHRR Section 2.3.2.13 Near-Shore Tsunamis                9.2 ft.          25.7 ft          34.9 ft.      FHRR Section 2.3.2.6.2 NAVD88                              NAVD88 FHRR Section 2.3.2.13 Ice-Induced Flooding Not included    Not included      Not included       FHRR Section 2.3.2.7 in DB            in DB              in DB 1
191-188.0 ft. NAVD88 Minimal88.0 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
194-188.1 ft. NAVD88 Minimal88.1 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
Diablo Canyon Nuclear Power Plant, Units 1 & 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 Not included      Not included      Not included      FHRR Section 2.3.2.8 in DB              in DB              in DB Note 1: Reported values are rounded to the nearest one-tenth of a foot.
192-2 88.0 ft. NAVD88Minimal 88.0 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
2
191-2/191A-287.9 ft. NAVD88 Minimal87.9 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
194-2117.6 ft.
Diablo Canyon Nuclear Power Plant, Units 1 & 2 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 Door/Unit No. A2.1                87.4 ft.         Minimal            87.4 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No. BU102              87.4 ft.         Minimal            87.4 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU103                87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.A3.1                 87.4 ft.         Minimal            87.4 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.A3.2                87.4 ft.         Minimal            87.4 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.A3.3                87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU104/5              87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.101-1                87.7 ft.         Minimal            87.7 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.102-1               87.7 ft.         Minimal            87.7 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.119-1                87.9 ft.         Minimal            87.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.122-1               88.1 ft.        Minimal            88.1 ft.      FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 1
NAVD88 Minimal117.6 ft.
 
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism            Stillwater        Waves/         Reevaluated              Reference Elevation          Runup              Hazard Elevation Door/Unit No.C1.1                87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.129                  87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.130                  87.5 ft.         Minimal            87.5 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.C1.2                87.7 ft.         Minimal            87.7 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU108-2             87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU105-2              87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.BU106-2              87.5 ft.         Minimal            87.5 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.B2.1                87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No. BU101              87.3 ft.         Minimal            87.3 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.B1.1                87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.B1.2                87.6 ft.         Minimal            87.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.101-2                87.8 ft.         Minimal            87.8 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 2
363-1117.9 ft.
 
NAVD88Minimal117.9 ft.
Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism            Stillwater        Waves/         Reevaluated              Reference Elevation          Runup              Hazard Elevation Door/Unit No.102-2                87.8 ft.         Minimal            87.8 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.119-2               87.9 ft.         Minimal            87.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.122-2                88.0 ft.         Minimal            88.0 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.192-1                88.2 ft.         Minimal            88.2 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.191-1               88.0 ft.         Minimal            88.0 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.194-1                88.0 ft.         Minimal            88.0 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.192-2                88.1 ft.         Minimal            88.1 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.191-2/191A-2         88.0 ft.         Minimal            88.0 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.194-2               87.9 ft.         Minimal            87.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.363-1              117.6 ft.         Minimal          117.6 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.361-1              117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.360-1              117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 3
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
 
361-1117.9 ft.
Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism                Stillwater          Waves/         Reevaluated              Reference Elevation          Runup              Hazard Elevation Door/Unit No.355-1                   117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.354-1                    117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.360-2                    117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.361-2                    117.9 ft.         Minimal          117.9 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 Door/Unit No.363-2                    117.5 ft.         Minimal          117.5 ft.     FHRR Enclosure 1 Table 3-5 NAVD88                              NAVD88 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.
NAVD88 Minimal117.9 ft.
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.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
4}}
360-1 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA MechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation ReferenceNote 2: Reevaluated hazard mechanisms bounded by the current design basis (see Table 1) are not included in this tableNote 3: Reported values are rounded to the nearest one-tenth of a foot.117.9 ft.
NAVD88 Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
355-1117.9 ft.
NAVD88Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
354-1117.9 ft.
NAVD88 Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
360-2117.9 ft.
NAVD88 Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
361-2117.5 ft.
NAVD88Minimal117.5 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
363-2Note 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.
Diablo Canyon Nuclear Power Plant, Units 1 & 2Table 1. Current Design Basis Flood Hazards for Use in the MSA MechanismStillwater Elevation Waves/ Runup Reference Design Basis Hazard Elevation Local Intense Precipitation No Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Section 2.3.2.1Failure of Dams and Onsite Water Control/Storage Structures No Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Section 2.3.2.3Streams and Rivers Diablo Creek 81.9 ft. NAVD88 Not applicable 81.9 ft. NAVD88FHRR Section 2.3.2.2Storm Surge Storm Surge No Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Section 2.3.2.4 SeicheNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedNo Impact on the Site IdentifiedFHRR Section 2.3.2.5 TsunamiDistantly-Generated Tsunamis 20.0 ft. NAVD88 10.3 ft 30.3 ft. NAVD88 FHRR Section 2.3.2.6.1FHRR Section 2.3.2.13Near-Shore Tsunamis 9.2 ft. NAVD88 25.7 ft 34.9 ft. NAVD88 FHRR Section 2.3.2.6.2FHRR Section 2.3.2.13Ice-Induced FloodingNot included in DBNot included in DBNot included in DBFHRR Section 2.3.2.7 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 1. Current Design Basis Flood Hazards for Use in the MSA MechanismStillwater Elevation Waves/ Runup Reference Design Basis Hazard ElevationNote 1: Reported values are rounded to the nearest one-tenth of a foot.Channel Migrations/Diversions Not included in DB Not included in DB Not included in DBFHRR Section 2.3.2.8 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA MechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation ReferenceLocal Intense Precipitation87.4 ft. NAVD88 Minimal87.4 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. A2.1 87.4 ft. NAVD88Minimal 87.4 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU10287.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU10387.4 ft. NAVD88 Minimal87.4 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. A3.1 87.4 ft. NAVD88Minimal 87.4 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
A3.287.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. A3.387.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU104/587.7 ft. NAVD88 Minimal87.7 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
101-187.7 ft. NAVD88 Minimal87.7 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
102-1 87.9 ft. NAVD88Minimal 87.9 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. 119-188.1 ft. NAVD88 Minimal88.1 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
122-1 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA MechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation Reference87.6 ft. NAVD88 Minimal87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
C1.1 87.6 ft. NAVD88Minimal 87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
12987.5 ft. NAVD88 Minimal87.5 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
13087.7 ft. NAVD88 Minimal87.7 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
C1.2 87.3 ft. NAVD88Minimal 87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
BU108-287.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU105-287.5 ft. NAVD88 Minimal87.5 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU106-2 87.6 ft. NAVD88Minimal 87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
B2.187.3 ft. NAVD88 Minimal87.3 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. BU10187.6 ft. NAVD88 Minimal87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. B1.1 87.6 ft. NAVD88Minimal 87.6 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
B1.287.8 ft. NAVD88 Minimal87.8 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
101-2 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA MechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation Reference87.8 ft. NAVD88 Minimal87.8 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
102-2 87.9 ft. NAVD88Minimal 87.9 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No. 119-288.0 ft. NAVD88 Minimal88.0 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
122-288.2 ft. NAVD88 Minimal88.2 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
192-1 88.0 ft. NAVD88Minimal 88.0 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
191-188.0 ft. NAVD88 Minimal88.0 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
194-188.1 ft. NAVD88 Minimal88.1 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
192-2 88.0 ft. NAVD88Minimal 88.0 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
191-2/191A-287.9 ft. NAVD88 Minimal87.9 ft. NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
194-2117.6 ft.
NAVD88 Minimal117.6 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
363-1117.9 ft.
NAVD88Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
361-1117.9 ft.
NAVD88 Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
360-1 Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA MechanismStillwater Elevation Waves/ RunupReevaluated Hazard Elevation ReferenceNote 2: Reevaluated hazard mechanisms bounded by the current design basis (see Table 1) are not included in this tableNote 3: Reported values are rounded to the nearest one-tenth of a foot.117.9 ft.
NAVD88 Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
355-1117.9 ft.
NAVD88Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
354-1117.9 ft.
NAVD88 Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
360-2117.9 ft.
NAVD88 Minimal117.9 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
361-2117.5 ft.
NAVD88Minimal117.5 ft.
NAVD88FHRR Enclosure 1 Table 3-5Door/Unit No.
363-2Note 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.}}

Revision as of 21:35, 30 October 2019

MSFHI Tables 1&2 Final 3-24-2016
ML16084A610
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 03/30/2016
From: Richard Rivera-Lugo
NRC/NRO/DSEA/RHMB
To:
Rivera-Lugo R
Shared Package
ML16083A552 List:
References
Download: ML16084A610 (6)
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Text

Diablo Canyon Nuclear Power Plant, Units 1 & 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 No Impact No Impact No Impact FHRR Section 2.3.2.1 on the Site on the Site on the Site Identified Identified Identified Streams and Rivers Diablo Creek 81.9 ft. Not 81.9 ft. FHRR Section 2.3.2.2 NAVD88 applicable NAVD88 Failure of Dams and Onsite Water Control/Storage Structures No Impact No Impact No Impact FHRR Section 2.3.2.3 on the Site on the Site on the Site Identified Identified Identified Storm Surge Storm Surge No Impact No Impact No Impact FHRR Section 2.3.2.4 on the Site on the Site on the Site Identified Identified Identified Seiche No Impact No Impact No Impact FHRR Section 2.3.2.5 on the Site on the Site on the Site Identified Identified Identified Tsunami Distantly-Generated Tsunamis 20.0 ft. 10.3 ft 30.3 ft. FHRR Section 2.3.2.6.1 NAVD88 NAVD88 FHRR Section 2.3.2.13 Near-Shore Tsunamis 9.2 ft. 25.7 ft 34.9 ft. FHRR Section 2.3.2.6.2 NAVD88 NAVD88 FHRR Section 2.3.2.13 Ice-Induced Flooding Not included Not included Not included FHRR Section 2.3.2.7 in DB in DB in DB 1

Diablo Canyon Nuclear Power Plant, Units 1 & 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 Not included Not included Not included FHRR Section 2.3.2.8 in DB in DB in DB Note 1: Reported values are rounded to the nearest one-tenth of a foot.

2

Diablo Canyon Nuclear Power Plant, Units 1 & 2 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 Door/Unit No. A2.1 87.4 ft. Minimal 87.4 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No. BU102 87.4 ft. Minimal 87.4 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU103 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.A3.1 87.4 ft. Minimal 87.4 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.A3.2 87.4 ft. Minimal 87.4 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.A3.3 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU104/5 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.101-1 87.7 ft. Minimal 87.7 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.102-1 87.7 ft. Minimal 87.7 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.119-1 87.9 ft. Minimal 87.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.122-1 88.1 ft. Minimal 88.1 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 1

Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Door/Unit No.C1.1 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.129 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.130 87.5 ft. Minimal 87.5 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.C1.2 87.7 ft. Minimal 87.7 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU108-2 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU105-2 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU106-2 87.5 ft. Minimal 87.5 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.B2.1 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No. BU101 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.B1.1 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.B1.2 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.101-2 87.8 ft. Minimal 87.8 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 2

Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Door/Unit No.102-2 87.8 ft. Minimal 87.8 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.119-2 87.9 ft. Minimal 87.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.122-2 88.0 ft. Minimal 88.0 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.192-1 88.2 ft. Minimal 88.2 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.191-1 88.0 ft. Minimal 88.0 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.194-1 88.0 ft. Minimal 88.0 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.192-2 88.1 ft. Minimal 88.1 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.191-2/191A-2 88.0 ft. Minimal 88.0 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.194-2 87.9 ft. Minimal 87.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.363-1 117.6 ft. Minimal 117.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.361-1 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.360-1 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 3

Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Door/Unit No.355-1 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.354-1 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.360-2 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.361-2 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.363-2 117.5 ft. Minimal 117.5 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 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.

4

Diablo Canyon Nuclear Power Plant, Units 1 & 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 No Impact No Impact No Impact FHRR Section 2.3.2.1 on the Site on the Site on the Site Identified Identified Identified Streams and Rivers Diablo Creek 81.9 ft. Not 81.9 ft. FHRR Section 2.3.2.2 NAVD88 applicable NAVD88 Failure of Dams and Onsite Water Control/Storage Structures No Impact No Impact No Impact FHRR Section 2.3.2.3 on the Site on the Site on the Site Identified Identified Identified Storm Surge Storm Surge No Impact No Impact No Impact FHRR Section 2.3.2.4 on the Site on the Site on the Site Identified Identified Identified Seiche No Impact No Impact No Impact FHRR Section 2.3.2.5 on the Site on the Site on the Site Identified Identified Identified Tsunami Distantly-Generated Tsunamis 20.0 ft. 10.3 ft 30.3 ft. FHRR Section 2.3.2.6.1 NAVD88 NAVD88 FHRR Section 2.3.2.13 Near-Shore Tsunamis 9.2 ft. 25.7 ft 34.9 ft. FHRR Section 2.3.2.6.2 NAVD88 NAVD88 FHRR Section 2.3.2.13 Ice-Induced Flooding Not included Not included Not included FHRR Section 2.3.2.7 in DB in DB in DB 1

Diablo Canyon Nuclear Power Plant, Units 1 & 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 Not included Not included Not included FHRR Section 2.3.2.8 in DB in DB in DB Note 1: Reported values are rounded to the nearest one-tenth of a foot.

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Diablo Canyon Nuclear Power Plant, Units 1 & 2 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 Door/Unit No. A2.1 87.4 ft. Minimal 87.4 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No. BU102 87.4 ft. Minimal 87.4 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU103 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.A3.1 87.4 ft. Minimal 87.4 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.A3.2 87.4 ft. Minimal 87.4 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.A3.3 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU104/5 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.101-1 87.7 ft. Minimal 87.7 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.102-1 87.7 ft. Minimal 87.7 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.119-1 87.9 ft. Minimal 87.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.122-1 88.1 ft. Minimal 88.1 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 1

Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Door/Unit No.C1.1 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.129 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.130 87.5 ft. Minimal 87.5 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.C1.2 87.7 ft. Minimal 87.7 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU108-2 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU105-2 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.BU106-2 87.5 ft. Minimal 87.5 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.B2.1 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No. BU101 87.3 ft. Minimal 87.3 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.B1.1 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.B1.2 87.6 ft. Minimal 87.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.101-2 87.8 ft. Minimal 87.8 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 2

Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Door/Unit No.102-2 87.8 ft. Minimal 87.8 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.119-2 87.9 ft. Minimal 87.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.122-2 88.0 ft. Minimal 88.0 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.192-1 88.2 ft. Minimal 88.2 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.191-1 88.0 ft. Minimal 88.0 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.194-1 88.0 ft. Minimal 88.0 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.192-2 88.1 ft. Minimal 88.1 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.191-2/191A-2 88.0 ft. Minimal 88.0 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.194-2 87.9 ft. Minimal 87.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.363-1 117.6 ft. Minimal 117.6 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.361-1 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.360-1 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 3

Diablo Canyon Nuclear Power Plant, Units 1 & 2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Waves/ Reevaluated Reference Elevation Runup Hazard Elevation Door/Unit No.355-1 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.354-1 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.360-2 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.361-2 117.9 ft. Minimal 117.9 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 Door/Unit No.363-2 117.5 ft. Minimal 117.5 ft. FHRR Enclosure 1 Table 3-5 NAVD88 NAVD88 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.

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