1. NAME AND TITLE

FONTA: Code System For Calculating Individual And Collective Doses From Reactor Accidents Using Pasquill's Plume Model.

AUXILIARY ROUTINES

The CORE inventory for FONTA can be determined using the CCC-271/ORIGEN code package.

2. CONTRIBUTOR

Research Association for Atomic Energy, Inc., Vienna, Austria.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; Siemens 4004, BS 2000.

4. NATURE OF PROBLEM SOLVED.

FONTA calculates the radiological consequences of accidental releases of radioactive substances into the atmosphere. The doses to seven organs may be evaluated summing up the doses due to immersion, inhalation, and irradiation by deposits. Contributions of 54 isotopes may be taken into consideration for the evaluation of individual and collective doses.

5. METHOD OF SOLUTION

The calculation method is based on Pasquill's plume model which is modified by some corrections such as plume rise effect, building wake effect, and the effects of wet and dry deposition. The local dependency of the doses is taken into account by subdividing the sector covered by the plume into ring segments at the centers of which are located the test points for the dose calculation.

6. RESTRICTIONS OR LIMITATIONS

FONTA is dimensioned for a maximum of 54 isotopes and 30 ring segments.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for FONTA.

8. COMPUTER HARDWARE REQUIREMENTS

FONTA is operable on the Siemens 4004.

9. COMPUTER SOFTWARE REQUIREMENTS

A Fortran IV compiler is required. FINSIM from the Siemens Subroutine Package SSPLIB is required for the numerical integration.

10. REFERENCE

F. Woloch and G. Kamelander, "FONTA, A Program for Calculating the Radiological Consequences of Radioactive Releases Due to Hypothetical Accidents in Nuclear Power Plants," RS-116/77 (September 1977).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source code and sample problem input.

12. DATE OF ABSTRACT

April 1982; reviewed June 1982.