NEA-0701 TIRION-4

TIRION-4, Atmospheric Dispersion of Radioactive Materials for Various Weather Conditions

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: TIRION-4 - Consequences of releas- ing radioactive material to atmosphere.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.

Program name	Package id	Status	Status date
TIRION-4	NEA-0701/01	Tested	16-JUL-1981

Machines used:

Package ID	Orig. computer	Test computer
NEA-0701/01	IBM 3033	IBM 3033

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3. DESCRIPTION OF PROBLEM OR FUNCTION

TIRION examines the atmos- pheric dispersion of radioactive material in a variety of weather conditions. With it, it is possible to calculate the doses to various organs consequent upon inhalation of the material and to make an estimate of the number of people likely to suffer acute or latent effects. In addition, contamination of the ground by acti- nides and gamma-emitters is considered. A probabilistic approach is adopted and the results can be presented as frequency-casualty curves.

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4. METHOD OF SOLUTION

Basic Gaussian model of atmospheric disper- sion modified to take into account radioactive decay, dry deposi- tions, and plume rise (where applicable). Inhalation factors based on ICRP lung model. Standard dose-risk relationship.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM: No more than 70 nuclides to be released.

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6. TYPICAL RUNNING TIME: 0.5-10 minutes depending on number of options chosen.

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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
NEA-0701/01	16-JUL-1981	Tested at NEADB

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10. REFERENCES:

NEA-0701/01, included references:

- G.D. Kaiser:
  A Description of the Mathematical and Physical Models Incorporated
  in TIRION 2 - A Computer Program that Calculates the Consequences
  of a Release of Radioactive Material to the Atmosphere and an
  Example of its Use
  SRD R 63 (October 1976)
- L.S. Fryer and G.D. Kaiser:
  TIRION 4 - A Computer Program for Use in Nuclear Safety Studies
  SRD R 134 (November 1978)
- L.S. Fryer:
  A Guide to TIRION 4 - A Computer Code for Calculating the Conse
  quences of Releasing Radioactive Material to the Atmosphere
  SRD R 120 (December 1978)

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11. MACHINE REQUIREMENTS

Core: 460 kbytes
CALCOMP 565 Incremental Graph Plotter

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0701/01	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: MVS.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHOR

          G. D. Kaiser
          Safety and Reliability Directorate
          United Kingdom Atomic Energy Authority
          Wigshaw Lane
          Culcheth Warrington WA3 4NE
          United Kingdom

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16. MATERIAL AVAILABLE

NEA-0701/01

File name	File description	Records
NEA0701_01.002	INFORMATION FILE	7
NEA0701_01.003	JCL	8
NEA0701_01.004	SOURCE	8399
NEA0701_01.005	PLOT DUMMY ROUTINES	20
NEA0701_01.006	INPUT DATA	304
NEA0701_01.007	OUTPUT	7705

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17. CATEGORIES

G. Radiological Safety, Hazard and Accident Analysis
R. Environmental and Earth Sciences

Keywords: actinides, atmospheric precipitations, doses, health hazards, radioactive aerosols, weather.