HARAD: a computer code for calculating daughter concentrations in air following the atmospheric release of a parent radionuclide
The HARAD computer code, written in FORTRAN IV, calculates concentrations of radioactive daughters in air following the atmospheric release of a parent radionuclide under a variety of meteorological conditions. It can be applied most profitably to the assessment of doses to man from the noble gases such as /sup 222/Rn, /sup 220/Rn, and Xe and Kr isotopes. These gases can produce significant quantities of short-lived particulate daughters in an airborne plume, which are the major contributors to dose from these chains with gaseous parent radionuclides. The simultaneous processes of radioactive decay, buildup, and environmental losses through wet and dry deposition on ground surfaces are calculated for a daughter chain in an airborne plume as it is dispersed downwind from a point of release of a parent. The code employs exact solutions of the differential equations describing the above processes over successive discrete segments of downwind distance. Average values for the dry deposition coefficients of the chain members over each of these distance segments were treated as constants in the equations. The advantage of HARAD is its short computing time.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5475978
- Report Number(s):
- ORNL-5634; TRN: 80-008766
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
61 RADIATION PROTECTION AND DOSIMETRY
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
COMPUTER CODES
H CODES
DAUGHTER PRODUCTS
DOSIMETRY
COMPUTER CALCULATIONS
EARTH ATMOSPHERE
RADIONUCLIDE MIGRATION
HUMAN POPULATIONS
RADIATION DOSES
KRYPTON ISOTOPES
ENVIRONMENTAL TRANSPORT
RADON 220
RADON 222
XENON ISOTOPES
BUILDUP
DECAY
DEPOSITION
DIFFUSION
FISSION PRODUCT RELEASE
NUCLEAR FACILITIES
PLUMES
RADIOACTIVE AEROSOLS
AEROSOLS
ALPHA DECAY RADIOISOTOPES
COLLOIDS
DAYS LIVING RADIOISOTOPES
DISPERSIONS
DOSES
EVEN-EVEN NUCLEI
HEAVY NUCLEI
ISOTOPES
MASS TRANSFER
NUCLEI
POPULATIONS
RADIOISOTOPES
RADON ISOTOPES
SECONDS LIVING RADIOISOTOPES
SOLS
500300* - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)
655003 - Medical Physics- Dosimetry
560171 - Radiation Effects- Nuclide Kinetics & Toxicology- Man- (-1987)
560161 - Radionuclide Effects
Kinetics
& Toxicology- Man
990200 - Mathematics & Computers