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The transport of radioactive material inside the building from one compartment to another is calculated with an indoor air quality model. The air quality models considers the transport of radioactive dust particulates and radon progeny due to air exchange, deposition and resuspension, and radioactive decay and ingrowth.
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An IBM or IBM-compatible microcomputer with a 3.1 or higher disk operating system, a hard disk drive, and approximately 400 kilobytes of free memory are required to run the code. A printer capable of 132 column output is desirable. A mathematical coprocessor, a color monitor, and a mouse are optional, but recommended; however, a mouse may not work with all monitor/graphics cards used in IBM or clone configurations.
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Six exposure pathways are considered in the RESRAD-BUILDcode:
external exposure directly from the source;
external exposure to materials deposited on the floor;
external exposure due to air submersion;
inhalation of airborne radioactive particulates;
inhalation of aerosol indoor radon progeny;
inadvertent ingestion of radioactive material, either directly from the sources or from materials deposited on the surfaces of the building compartments.
Keywords: buildings, contamination, doses, radiation effects.