CCC-0476: CAAC, System to Implement Atmospheric Dispersion Assessments

OECD Nuclear Energy Agency / L'Agence pour l'énergie nucléaire

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CCC-0476 CAAC. (Abstract last modified 27-APR-1988)

CAAC, System to Implement Atmospheric Dispersion Assessments

Abstract Table of Contents:

OPERATING SYSTEM

OTHER RESTRICTIONS

1. NAME OR DESIGNATION OF PROGRAM - CAAC.

2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name Package-ID Status CAAC CCC-0476/01 Obsolete CAAC CCC-0476/02 Obsolete CAAC CCC-0476/03 Tested

Machines used: Package-ID Orig.Computer Test Computer CCC-0476/03 IBM 3033 IBM 3090

3. DESCRIPTION OF PROGRAM OR FUNCTION - The Clean Air Act Codes (CAAC) implement the radiological assessment methodology used for the preparation of the Environmental Protection Agency 1984 Background Information Documents on Radionuclides. Atmospheric dispersion and deposition are calculated by AIRDOS-EPA. Dose and risk assessment tables are calculated by DARTAB from the binary output file produced by AIRDOS-EPA and a file of dose and risk factors calculated by RADRISK. Preprocessors (PREPAR and PREDA) for AIRDOS-EPS and DARTAB access data bases of element and nuclide dependent data to simplify the execution of the principal programs.

4. METHOD OF SOLUTION - AIRDOS-EPA implements a long term average Gaussian Plume model. The associated terrestrial model for deposition is based on NRC Regulatory Guide 1.109. The 70-year dose factors for DARTAB are calculated by RADRISK and, in general, are consistent with those in ICRP-30. Risks are calculated using a linear Life Table model consistent with BEIR-3. The resultant risk factors are 280.5 cancer deaths per 10**6 person rad (low LET) and 700 cancer deaths per 10**6 person WLM exposure to randon decay products.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - Programs are limited to 36 radionuclides and to 20 downwind distances for each of 16 compass directions. Memory Regions for execution on an IBM 3081 system under MVS are as follows:
       PREPAR          1008K
       AIRDOS-EPA       716K
       PREDA            148K
       DARTAB           668k

6. TYPICAL RUNNING TIME - A complete run, including PREPAR, AIRDOS-EPA, PREDA, and DARTAB, for an individual and population assessment requires approximately 1 and 2 minutes of CPU time respectively on an IBM 3081 processor.

7. UNUSUAL FEATURES OF THE PROGRAM -

8. RELATED AND AUXILIARY PROGRAMS -
DARTAB: Code system for combining airborne radionuclide environmental exposure data with dosimetric and health effects data.
AIRDOS-EPA: Estimation of radiation doses caused by airborne radionuclides around nuclear facilities.
PREPAR: A User-Friendly Preprocessor to Create AIRDOS-EPA Input Data Sets.
RADFMT: Converts DARTAB data to binary.

9. STATUS
CCC-0476/01: 09-JUN-1986 Obsolete
CCC-0476/02: 20-APR-2000 Obsolete
CCC-0476/03: 27-APR-1988 Tested at NEADB

10. REFERENCES  -
CCC-0476/03:
- R.E. Moore et al.:
  AIRDOS-EPA: A Computerized Methodology for Estimating
  Environmental Concentrations and Dose to Man from Airborne
  Releases of Radionuclides.
  ORNL-5532  (June 1979)
- C.L. Begovich et al.:
  DARTAB: A Program to Combine Airborne Radionuclide Environmental
  Exposure Data with Dosimetric and Health Effects Data to Generate
  Tabulations of Predicted Health Impacts.
  ORNL-5692  (August 1981)
- A.L. Sjoreen and C. Miller:
  PREPAR - A User-Friendly Preprocessor to Create AIRDOS-EPA Input
  Data Sets.
  ORNL-5952  (August 1984)
- J.G. Darst:
  User's Manual for CCC-476A/CAAC or CCC-476B/CAAC AIRDOS-EPA
  Codes AIRDOS and PREPAR.
  Westinghouse Materials Company, Informal Report (September 1987)

11. MACHINE REQUIREMENTS -

12. PROGRAMMING LANGUAGE(S) USED -
CCC-0476/03: FORTRAN-IV

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED -

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS -

15. NAME AND ESTABLISHMENT OF AUTHORS -

16. MATERIAL AVAILABLE -
CCC-0476/03:
AIRDOS Preprocessor Source Code
TIMER Source Code (Assembler)
AIRDOS-EPA Source Code
DARTAB Preprocessor Source Code
DARTAB Source Code
ALLRAD Data
POPA Data
FARMA Data
STARA Data
PRDIND Data
PRPPOP Data
JCL FORTV
JCL ASMHC
JCL TESTIND
JCL TESTPOP
JCL for RADFMT
RADFMT Source Code
DARTAB Data File  (Binary)
TESTIND Printed Output
TESTPOP Printed Output
report                   ORNL-5532  (June 1979)                     REPPT
report                   ORNL-5692  (August 1981)                   REPPT
report                   ORNL-5952  (August 1984)                   REPPT
report                   WMC Informal Report (September 1987)       REPPT

17. CATEGORIES -

- G. Radiological Safety, Hazard and Accident Analysis

Keywords: DISPERSIONS, RADIONUCLIDE MIGRATION

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