THU-G - Rad NESHAPs Thursday 10/01/20 2:00 PM - 4:10 PM
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| Chair(s): Matthew Barnett, Alicia Williamson
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THU-G.1
2:00 PM U.S. Environmental Protection Agency Update on the Radionuclide NESHAPs JP Walsh*, U.S. EPA
Abstract: The U.S. Environmental Protection Agency (EPA) has regulatory oversight under the Clean Air Act of several source categories with the potential to emit radionuclides into the airborne environment. The National Emissions Standards for Hazardous Air Pollutants (NESHAP) for radionuclides include eight subparts of 40 CFR Part 61, which apply to various government and industrial sectors. These regulations are implemented by EPA headquarters, EPA Regional offices, and several delegated State governments. A summary of the past year’s relevant activities by the EPA is presented. Areas with significant developments in the past year include the applicability of NESHAP Subpart I reactors not licensed by the NRC, radon measurement methodology, revisiting risk assessment for uses of phosphogypsum, and internal training and development.
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THU-G.2
2:20 PM DOE Subpart H Report SF Snyder*, PNNL, Richland, WA
; A Williamson, DOE-HQ
Abstract: Each U.S. Department of Energy site with radionuclide emissions to air is required to determine compliance with the 40 CFR 61, Subpart H, NESHAP standard, annually. A summary of DOE Site calendar year 2018 radioactive emissions and compliance status is presented. The 2018 results relative to other recent years are presented, as well.
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THU-G.3
2:40 PM Onsite Members of the Public at the Savannah River Site GT Jannik, SRNL
; BH Stagich*, SRNL; KM Minter, SRNL
Abstract: Prior to 2018 at the Savannah River Site (SRS), USEPA National Emission Standards for Hazardous Air Pollutants (NESHAPs) compliance doses to members of the public were only determined for a maximally exposed individual (MEI) located at the site boundary, in the worst-case sector. However, four onsite locations were determined to be public access points for SRS and are now considered potential MEI locations: Three Rivers Landfill (TRL), South Carolina Army National Guard (SCARNG) Tract A (B-Area Barracks), Savannah River Ecology Lab Conference Center (SREL), and SCARNG Tract B (Gunsite 51). The worst-case sectors and distances to these onsite locations from each operating facility were determined and the subsequent doses are compared to the standard offsite MEI. Other changes to the USEPA CAP88-PC input parameters included updating the assumed agricultural food source for an onsite MEI to Regional food source and an offsite MEI to Local food source. A Regional food source is used for the Onsite members of the public because food will not be grown at these work locations. Changes to the agricultural food source result in different fractions of vegetable, milk and meat being home produced, or produced in the assessment area. Because onsite workers at TRL, SREL, SCARNG Tract A, and SCARNG Tract B are now considered members of the public, the doses from several SRS operating areas increased dramatically. However, the maximum dose (the SRS annual reported compliance dose), which occurs from SRS’s H-Area, did not change significantly. A comparison and discussion of the impact on doses to SRS members of the public will be provided.
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THU-G.
3:00 PM BREAK
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THU-G.5
3:10 PM Radioactive Air Emissions Update on Standards and Works in Progress JM Barnett*, Pacific Northwest National Laboratory
; DF Fuehne, Los Alamos National Laboratory; SF Snyder, Pacific Northwest National Laboratory; JA Glissmeyer, Glissmeyer Environmental LLC; B Asamoto, Hi-Q Environmental Products Company, Inc.
Abstract: Radioactive air emissions sampling and monitoring updates on the progress of the work groups relevant ISO and ANSI standards are presented. Status is provided for the ISO-2889 and ANSI/HPS N13.1 revisions which address the sampling of airborne radioactive materials from the stacks and ducts of nuclear facilities; both standards are nearly complete. Progress of the ANSI/HPS N13.61 project on sampling and monitoring airborne radioactive substances form the ambient atmosphere is addressed. Finally, the status of the ISO/TC85/SC2/WG14 proposed standards and technical reports is presented for 1) monitoring radioactive gases in effluents from facilities producing positron emitting radionuclides and radiopharmaceuticals, 2) tritium and carbon-14 activity in gaseous effluents and gas discharges of nuclear installations – sampling, 3) evaluating the performance of continuous air monitors.
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THU-G.6
3:25 PM U.S. Environmental Protection Agency Update on Compliance Codes DO Stuenkel*, U.S. Environmental Protection Agency
; BK Littleton, U.S. Environmental Protection Agency; RP Wood, Trinity Engineering Associates
Abstract: The U.S. Environmental Protection Agency (EPA) maintains several computer codes used to demonstrate compliance with public dose limits set by 40 CFR 61, National Emission Standards for Hazardous Air Pollutants (NESHAPs). These include CAP-88 PC, COMPLY, and COMPLY-R. Efforts to finalize CAP88-PC, Version 4.1 have been completed for release in 2020, along with a beta version of STARGET, a stand-alone code to convert meteorological data from the stability array (STAR) file format to the "wind file" format required by the code. Version 4.1 updates the dose and risk conversion factors from those included in DCFPAK 2.2 to those in DCFPAK 3.02; implements a new installer technology that enhances compatibility with Windows 10 (and future Windows updates); and makes some minor changes to the user interface. The CAP88 User’s Manual has been updated, and a quick start guide has been developed. Plans for future updates to all three codes are currently under consideration.
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THU-G.
3:40 PM Questions and Answers
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