Projects

Rocky Flats Dose Reconstruction Project

Reconstruct atmospheric concentrations of plutonium and chemicals from airborne releases at the Rocky Flats Plant. Compute lifetime cancer risk with uncertainty to representative persons exposed to airborne plutonium and chemicals.

Customer
Risk Assessments Corporation for Colorado Department of Health.

Publications

Rood, A.S., H.A. Grogan, and J.E. Till, 2002. “A Model for a Comprehensive Evaluation of Plutonium Released to the Air from the Rocky Flats Plant, 1953–1989.” Health Physics 82(2).

Rood, A.S., P.D. McGavran, J. Aanennson, 2000. “Stochastic Estimates of Carcinogenic Risk with Uncertainty from Carbon Tetrachloride Released from the Rocky Flats Plant.” Risk Analysis ,21(4), pp. 675-696.

Performance Assessment of the US Ecology Site, Richland Washington

Develop a model to quantitatively evaluate past and long-term performance of the U.S. Ecology Low-Level Radioactive Disposal Facility in Richland Washington in support of the Environmental Impact Statement and evaluation of closure alternatives. Model development included a source emplacement and release model, transient vadose zone flow and transport model, and an aquifer transport model to calculate radionuclide concentrations in the underlying aquifer. Perl scripts were developed to perform Monte Carlo uncertainty analysis of predicted concentrations and radiological doses.

Customer
Washington Department of Health

Publications

Rood, A.S., 2003. Groundwater Concentrations and Drinking Water Doses with Uncertainty for the U.S. Ecology Low-Level Radioactive Waste Disposal Facility, Richland Washington, K-Spar Inc., Idaho Falls, Idaho.

Meteorological Data Processing for use in MILDOS Uranium Mill Assessment Model

Perform meteorological data processing for numerous sites across the western United States for use in the MILDOS uranium mill assessment model.

Customer
TwoLines Inc, Grand Junction Colorado

Risk-based Screening Assessment of Radionuclides Released to the Columbia River

Develop a model to calculate radionuclide concentrations in the Columbia River from Hanford Reactor discharges of circulation water for 1944-1971. Integrate an exposure assessment model to estimate cancer morbidity risk to hypothetical individuals from exposure to contaminated Columbia River water and shoreline sediments.

Customer
Risk Assessments Corporation for Centers for Disease Control and Prevention

Publications

Grogan, H.A., A.S. Rood, J.W. Aanenson, and E.B. Liebow, 2002. A Risk-based Screening Analysis for Radionuclides Released to the Columbia River from Past Activities at the U.S. Department of Energy Nuclear Weapons Site in Hanford, Washington. RAC Report No. 3-CDC Task Order 7-2000 FINAL. Risk Assessment Corporation, Neeses, South Carolina.

Evaluation of Residual Tank Waste at the Hanford Reservation

Develop a two-dimensional PORFLOW model of the vadose zone underlying the high-level radioactive waste storage tanks on the Hanford reservation. Link vadose zone fluxes to a MODFLOW/MT3D model of the underlying aquifer. Run model to determine impacts to the aquifer from a breach of high-level radioactive waste tank.

Customer
Risk Assessments Corporation for Washington State Department of Ecology

Publications

Risk Assessment Corporation, 2010. Source Term and Transport Modeling for Single Shell Tanks at the Hanford Site. '1-WA-209-FINAL, Risk Assessment Corporation, Neeses South Carolina.

Uravan Uranium Mill Dose Reconstruction

Develop a CALPUFF atmospheric dispersion model application of the former Uravan uranium mill in western Colorado. Install meteorological monitoring equipment in canyon and mesa locations to delineate wind flow, and use in conjunction with other data in a CALMET simulation of the domain. Integrate atmospheric transport modeling into an overall comprehensive model to evaluate exposure and radiological dose with uncertainty to Uravan residents from stacks and tailings pile releases over a 49-year period.

Customer
Risk Assessment Corporation for Dow Chemical Inc.

Publications

Rood, A.S., P.G. Voillequé, S.K. Rope, H.A. Grogan, and J.E. Till, 2008. “Reconstruction of Atmospheric Concentrations and Deposition of Uranium and Decay Products Released from the Former Uranium Mill at Uravan Colorado USA.” Journal of Environmental Radioactivity, 99: 1258–1278.

Cerro Grande Fire at Los Alamos National Laboratory

Develop a CALPUFF atmospheric transport model of gas and particulate pollutants emitted during the Cerro Grande Fire in May of 2000 near Los Alamos New Mexico. Validate model using PM-10 measurements taken at various locations such as Santa Fe during the fire. Scale PM-10 and CO model predictions to possible releases of radionuclides and chemicals present in surface soils of the burned areas of Los Alamos National Laboratory. Compute inhalation health risks from radionuclides and chemicals entrained in the plume.

Customer
Risk Assessments Corporation for New Mexico Department of Environmental Quality

Publications

Grogan, H.A., J.W. Aanenson,, P.D. McGavran, K.R. Meyer, H.J. Mohler, S.S. Mohler, J.R. Rocco, A.S. Rood, J.E. Till, and L.H. Wilson, 2006. “Modeling of the Cerro Grande Fire at Los Alamos: An Independent Analysis of Exposure, Heath Risk, and Communication with the Public” In: Applied Modeling and Computations in Nuclear Science. ACS Symposium Series 945. American Chemical Society, Washington DC.

PSD Analysis of ONs Semiconductor Plant, Pocatello, Idaho

Assist in an AERMOD PSD analysis for the ONs Semiconductor plant, Pocatello Idaho. Construct a database to store and analyze results.

Customer
Stoller Environmental Inc., Idaho Falls, Idaho

Assessment of the INL Ambient Air Monitoring Network

Develop a regional CALPUFF model simulation of pollutant transport and dispersion from Idaho National Laboratory (INL) facilities and use the model to evaluate the probability of detection in the ambient air monitoring network of radionuclide releases.

Customer
Battelle Energy Alliance, Idaho Falls

Publications

Rood, A.S., A.J. Sondrup, and P.D. Ritter, 2016. “Quantitative Evaluation of an Air Monitoring Network using Atmospheric Dispersion Modeling and Frequency of Detection Methods” Health Physics 110(4).

Rood, A.S., and A.J. Sondrup, 2014. Development and Demonstration of a Methodology to Quantitatively Assess the INL Site Ambient Air Monitoring Network. INL/EXT-14-33194. Idaho National Laboratory, Idaho Falls, Idaho.