Nuclear Regulatory Commission-Licensed Disposal Area (NDA) 2020/NDA_Armoring_Project_final...
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www.energy.gov/EM 1 Approved for Public Release; Further Dissemination Unlimited Nuclear Regulatory Commission-Licensed Disposal Area (NDA) Armoring Project Stephen Bousquet Federal Project Director Quarterly Public Meeting February 26, 2020
Transcript of Nuclear Regulatory Commission-Licensed Disposal Area (NDA) 2020/NDA_Armoring_Project_final...
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Nuclear Regulatory Commission-Licensed Disposal Area (NDA)
Armoring Project
Stephen BousquetFederal Project Director
Quarterly Public MeetingFebruary 26, 2020
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NDA Armoring Project
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• Purpose of the NDA Armoring Project:
• Reduce future erosion risk if NDA Cap’s design basis is exceeded with the resulting potential overtopping and erosion of the NDA north slope.
• Design Basis:
• The design flood was chosen based on precipitation from 1/2 Probable Maximum Precipitation (PMP) per NRC recommendation, in accordance with NUREG-1623, Design of Erosion Protection for Long-Term Stabilization, Section 2.2.
• Design Review: Multi-agency design review (DOE, NRC, NYSERDA, U.S. Army Corp of Engineers, NYSDEC)
• Installation: June 3, 2019 – September 20, 2019
• Inspections: Annually and after rain events exceeding 1” over 24 hours
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WVDP Aerial View
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NDA Armoring Project Aerial View
Location of NDA Armoring Project
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Armoring Project Progress Photos
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Before Armoring Excavation Initiated Early Stages of Excavation
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Armoring Project Progress Photos (Cont.)
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Continuing Excavation Temporary Stormwater Bypass Pipes
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Armoring Project Progress Photos (Cont.)
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Stormwater Bypass Pipe Outlets and Erosion Control
Final Stages of Excavation
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Armoring Project Progress Photos (Cont.)
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Final Stages of Excavation Placement of Articulated Concrete Block (ACB)
Mats
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Armoring Project Progress Photos (Cont.)
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Placement of ACB Mats
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Armoring Project Progress Photos (Cont.)
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Grouted seams
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Armoring Project Progress Photos (Cont.)
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Backfill placement Tying in North Slope of NDA Cap with Armoring
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Armoring Project Progress Photos (Cont.)
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Vegetation starting within ACB on North Slope Grass growing
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NDA Armoring Project Summary & Conclusion
• Installation from June 3, 2019 – September 20, 2019
• 18,000 cubic feet of soil excavated with 90% reused within the project boundary with the remainder disposed of, or waiting disposal offsite
• 35,000 cubic feet of new backfill placed
• 13,000 square feet of ACB placed (each block in the matt weighing 100 lbs.)
• 7,000 hours of work without an injury
• Conclusion: If the NDA’s north slope berm were to ever overtop, the now armored north side slope of the NDA would not be prone to erosion.
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