ML16266A546
| ML16266A546 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 12/21/2016 |
| From: | Aida Rivera-Varona NRC/NRO/DSEA/RHMB |
| To: | |
| Rivera-Varona A | |
| References | |
| Download: ML16266A546 (6) | |
Text
MillstonePowerStation,Unit2 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 14.5 ft NGVD29 Minimal 14.5 ft NGVD29 FHRR Table 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 Sections 2.3.3 & 3.3 Streams and Rivers No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 1.2-1 Storm Surge Storm Surge (standing wave) within the Intake Structure for Unit 2 26.5 ft NGVD29 Not applicable 26.5 ft NGVD29 FHRR Sections 1.5 and 3.4 Storm Surge at the Powerblock 18.1 ft NGVD29 7.0 ft 25.1 ft NGVD29 FHRR Section 3.9 and FHRR Table 3.0-1 FHRR Table 1.2-1 Seiche No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 1.2-1 Tsunami Not included in DB Not included in DB Not included in DB FHRR Table 1.2-1 Ice-Induced Flooding No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 1.2-1
MillstonePowerStation,Unit2 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 Table 1.2-1
MillstonePowerStation,Unit2 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Elevation Waves/
Runup Reevaluated Hazard Elevation Reference 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.
Local Intense Precipitation 17.5 ft NGVD29 Minimal 17.5 ft NGVD29 FHRR Section 3.1 Streams and Rivers 11.2 ft NGVD29 Not applicable 11.2 ft NGVD29 FHRR Section 2.2 Storm Surge Under Review Under Review Under Review Tsunami 14.7 ft NGVD29 Not applicable 14.7 ft NGVD29 FHRR Section 2.6
MillstonePowerStation,Unit3 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 RWST/SIL Valve Enclosure 24.9 ft NGVD29 Minimal 24.9 ft NGVD29 FHRR Table 1.2-3 and Table 3.0-3 Demineralized Water Storage Tank Block House 24.9 ft NGVD29 Minimal 24.9 ft NGVD29 FHRR Table 1.2-3 Fuel Building 24.9 ft NGVD29 Minimal 24.9 ft NGVD29 FHRR Table 1.2-3 Auxiliary Building Door A-24-6 24.9 ft NGVD29 Minimal 24.9 ft NGVD29 FHRR Table 3.0-3 Engineered Safety Features Building 24.9 ft NGVD29 Minimal 24.9 ft NGVD29 FHRR Table 1.2-3 Hydrogen Recombiner Building 24.9 ft NGVD29 Minimal 24.9 ft NGVD29 FHRR Table 1.2-3 Main Steam Valve Building 24.9 ft NGVD29 Minimal 24.9 ft NGVD29 FHRR Table 1.2-3 Emergency Generator Enclosure 24.3 ft NGVD29 Minimal 24.3 ft NGVD29 FHRR Table 1.2-3 Auxiliary Building Door A-24-1 24.9 ft NGVD29 Minimal 24.9 ft NGVD29 FHRR Table 3.0-3 Control Building 24.3 ft NGVD29 Minimal 24.3 ft NGVD29 FHRR Table 1.2-3 Streams and Rivers No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 1.2-2
MillstonePowerStation,Unit3 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.
Failure of Dams and Onsite Water Control/Storage Structures Not included in DB Not included in DB Not included in DB FHRR Sections 2.3.3 & 3.3 Storm Surge Storm Surge at Seaward Wall of Intake Structure for Unit 3 19.7 ft NGVD29 21.5 ft 41.2 ft NGVD29 FHRR Section 3.9 Storm Surge at Powerblock 19.7 ft NGVD29 4.1 ft 23.8 ft NGVD29 FHRR Section 1.5 FHRR Table 1.2-2 Seiche No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 1.2-2 Tsunami Not included in DB Not included in DB Not included in DB FHRR Table 1.2-2 Ice-Induced Flooding No Impact on the Site Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 1.2-2 Channel Migrations/Diversions No Impact on the SIte Identified No Impact on the Site Identified No Impact on the Site Identified FHRR Table 1.2-2
MillstonePowerStation,Unit3 Table 2. Reevaluated Flood Hazards for Flood-Causing Mechanisms for Use in the MSA Mechanism Stillwater Elevation Waves/
Runup Reevaluated Hazard Elevation Reference 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.
Streams and Rivers 11.2 ft NGVD29 Not applicable 11.2 ft NGVD29 FHRR Section 2.2 Storm Surge Under Review Under Review Under Review Tsunami 14.7 ft NGVD29 Not applicable 14.7 ft NGVD29 FHRR Section 2.6