Air Dispersion Modeling for Building 3026C/D Demolition

Ward, Richard C; Sjoreen, Andrea L; Eckerman, Keith F

doi:10.2172/983134

Title: Air Dispersion Modeling for Building 3026C/D Demolition

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Abstract

This report presents estimates of dispersion coefficients and effective dose for potential air dispersion scenarios of uncontrolled releases from Oak Ridge National Laboratory (ORNL) buildings 3026C, 3026D, and 3140 prior to or during the demolition of the 3026 Complex. The Environmental Protection Agency (EPA) AERMOD system1-6 was used to compute these estimates. AERMOD stands for AERMIC Model, where AERMIC is the American Meteorological Society-EPA Regulatory Model Improvement Committee. Five source locations (three in building 3026D and one each in building 3026C and the filter house 3140) and associated source characteristics were determined with the customer. In addition, the area of study was determined and building footprints and intake locations of air-handling systems were obtained. In addition to the air intakes, receptor sites consisting of ground level locations on four polar grids (50 m, 100 m, 200 m, and 500 m) and two intersecting lines of points (50 m separation), corresponding to sidewalks along Central Avenue and Fifth Street. Three years of meteorological data (2006 2008) were used each consisting of three datasets: 1) National Weather Service data; 2) upper air data for the Knoxville-Oak Ridge area; and 3) local weather data from Tower C (10 m, 30 m and 100more »« less

Authors:

Ward, Richard C ^[1]; Sjoreen, Andrea L ^[1]; Eckerman, Keith F ^[1]

ORNL

Publication Date:: Tue Jun 01 00:00:00 EDT 2010

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 983134

Report Number(s):: ORNL/TM-2009/261
FD0412000; 3026 ARRA; TRN: US1004479

DOE Contract Number:: DE-AC05-00OR22725

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; SURPLUS NUCLEAR FACILITIES; DEMOLITION; RADIOACTIVE AEROSOLS; ENVIRONMENTAL TRANSPORT; ORNL; RADIATION DOSES; FORECASTING; COMPUTERIZED SIMULATION; Air dispersion modeling; plume transport; meteorology; air concentrations; dose

Citation Formats


                    Ward, Richard C, Sjoreen, Andrea L, and Eckerman, Keith F. Air Dispersion Modeling for Building 3026C/D Demolition.  United States: N. p., 2010. 
        Web.  doi:10.2172/983134.

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                    Ward, Richard C, Sjoreen, Andrea L, & Eckerman, Keith F. Air Dispersion Modeling for Building 3026C/D Demolition.  United States.  https://doi.org/10.2172/983134

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                    Ward, Richard C, Sjoreen, Andrea L, and Eckerman, Keith F. 2010.  
        "Air Dispersion Modeling for Building 3026C/D Demolition".  United States.  https://doi.org/10.2172/983134.  https://www.osti.gov/servlets/purl/983134.

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@article{osti_983134,

  title        = {Air Dispersion Modeling for Building 3026C/D Demolition},

  author       = {Ward, Richard C and Sjoreen, Andrea L and Eckerman, Keith F},

  abstractNote = {This report presents estimates of dispersion coefficients and effective dose for potential air dispersion scenarios of uncontrolled releases from Oak Ridge National Laboratory (ORNL) buildings 3026C, 3026D, and 3140 prior to or during the demolition of the 3026 Complex. The Environmental Protection Agency (EPA) AERMOD system1-6 was used to compute these estimates. AERMOD stands for AERMIC Model, where AERMIC is the American Meteorological Society-EPA Regulatory Model Improvement Committee. Five source locations (three in building 3026D and one each in building 3026C and the filter house 3140) and associated source characteristics were determined with the customer. In addition, the area of study was determined and building footprints and intake locations of air-handling systems were obtained. In addition to the air intakes, receptor sites consisting of ground level locations on four polar grids (50 m, 100 m, 200 m, and 500 m) and two intersecting lines of points (50 m separation), corresponding to sidewalks along Central Avenue and Fifth Street. Three years of meteorological data (2006 2008) were used each consisting of three datasets: 1) National Weather Service data; 2) upper air data for the Knoxville-Oak Ridge area; and 3) local weather data from Tower C (10 m, 30 m and 100 m) on the ORNL reservation. Annual average air concentration, highest 1 h average and highest 3 h average air concentrations were computed using AERMOD for the five source locations for the three years of meteorological data. The highest 1 h average air concentrations were converted to dispersion coefficients to characterize the atmospheric dispersion as the customer was interested in the most significant response and the highest 1 h average data reflects the best time-averaged values available from the AERMOD code. Results are presented in tabular and graphical form. The results for dose were obtained using radionuclide activities for each of the buildings provided by the customer.7 Radiation dose was calculated assuming complete release of the building inventory as information was lacking regarding the portion of the building inventory expected to be released. Thus the results are derived using an extremely conservative release as documented in the Preliminary Hazard Screening report.7 To more closely approximate the result of a release, one must estimate the fraction of the total inventory released and multiply the results described above by that fraction. An example of how this calculation is accomplished is provided. Should an actual uncontrolled release occur, the results of this modeling effort could only be used to establish a rough order-of-magnitude for the event.},

  doi          = {10.2172/983134},

  url          = {https://www.osti.gov/biblio/983134},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Jun 01 00:00:00 EDT 2010},

  month        = {Tue Jun 01 00:00:00 EDT 2010}

}

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