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CCC-0427 WRAITH.

WRAITH, Internal and External Doses from Atmospheric Release of Isotopes

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1. NAME OR DESIGNATION OF PROGRAM:  WRAITH.
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2. COMPUTERS
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Program name Package id Status Status date
WRAITH CCC-0427/01 Tested 14-MAY-1984

Machines used:

Package ID Orig. computer Test computer
CCC-0427/01 UNIVAC 1100 UNIVAC 1100
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3. DESCRIPTION OF PROBLEM OR FUNCTION

WRAITH calculates the atmospheric transport of radioactive material to each of a number of downwind receptor points and the external and internal doses to a reference man at each of the receptor points.
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4. METHOD OF SOLUTION

The movement of the released material through the atmosphere is calculated using a bivariate straight-line Gaussian distribution model with Pasquill values for standard deviations. The quantity of material in the released cloud is modified during its transit time to account for radioactive decay and daughter production. External doses due to exposure to the cloud can be calculated using a semi-infinite cloud approximation or a "finite plume" three-dimensional point-kernel numerical integration  technique. Internal doses due to acute inhalation are calculated using the ICRP Task Group Model and a four-segmented gastro- intestinal tract model. Translocation of the material between body compartments and retention in the body compartments are calculated using multiple exponential retention functions. Internal doses to each organ are calculated as sums of cross-organ doses with each target organ irradiated by radioactive material in a number of source organs. All doses are calculated in rads with separate values determined for high-LET and low-LET radiation.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Doses to only three  target organs (total body, red bone marrow, and the lungs) are considered and acute inhalation is the only pathway for material to  enter the body. The dose response model is not valid for high-LET radiation other than alphas. The high-LET calculation ignores the contributions of neutrons, spontaneous fission fragments, and alpha  recoil nuclei.
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6. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for WRAITH. A discussion of expensive, precise vs.
cheap, approximate calculations is provided in Appendox D of the referenced document.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS:
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9. STATUS
Package ID Status date Status
CCC-0427/01 14-MAY-1984 Tested at NEADB
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10. REFERENCES:
CCC-0427/01, included references:
- R.I. Scherpelz, F.J. Borst and G.R. Hoenes:
  WRAITH - A Computer Code for Calculating Internal and External
  Doses Resulting from an Atmospheric Release of Radioactive
  Material.  NUREG/CR-1690; PNL-3382  (August 1980)
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11. MACHINE REQUIREMENTS

WRAITH is operable on the UNIVAC 1100/44 computer with interactive system.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
CCC-0427/01 FORTRAN-IV
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

A FORTRAN IV compiler is required.
Installation-dependent routines must be supplied for the following subroutines:
     SECOND    used to find the time of program execution
     DATE      used to find the date of the job run
     TIME      used to find the time of day of the job run
     BANRF     prints the banner on the title page.
Dummy routines could be substituted without affecting the calculations.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHOR

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.
Developed by:   Battelle-Pacific Northwest Laboratory, Richland, Washington, USA
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16. MATERIAL AVAILABLE
CCC-0427/01
File name File description Records
CCC0427_01.002 WRAITH INFORMATION 35
CCC0427_01.003 WRAITH JCL 40
CCC0427_01.004 WRAITH SOURCE PROGRAM (FORTRAN-4) 2894
CCC0427_01.005 NUCDAT DATA LIBRARY (FORMATTED) 306
CCC0427_01.006 ORGDAT DATA LIBRARY (FORMATTED) 2780
CCC0427_01.007 SFACTR DATA LIBRARY (FORMATTED) 871
CCC0427_01.008 WRAITH TEST CASE INPUT FOR RUN1 8
CCC0427_01.009 WRAITH TEST CASE INPUT FOR RUN2 24
CCC0427_01.010 WRAITH TEST CASE OUTPUT (UNIT 15) OF RUN1 1206
CCC0427_01.011 WRAITH TEST CASE OUTPUT (UNIT 15) OF RUN1 2139
CCC0427_01.012 WRAITH TEST CASE OUTPUT (UNIT 6) OF RUN1 178
CCC0427_01.013 WRAITH TEST CASE OUTPUT (UNIT 6) OF RUN2 198
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17. CATEGORIES
  • G. Radiological Safety, Hazard and Accident Analysis

Keywords: accidents, air pollution, alpha particles, atmospheric precipitations, doses, kernels, plumes, radioactive release, radionuclide migration.