IAEA1219 APUD-3.0.

1. NAME OR DESIGNATION OF PROGRAM:  APUD-3.0.

3. DESCRIPTION OF PROGRAM OR FUNCTION

APUD is a research exercise aimed at providing rough yet fast predictive information to assist alert and intervention in the early- to-intermediate phases of nuclear accidents. Basically, the code calculates integral solutions of the advection-diffusion equation for the airborne activity concentration and related quantities such as deposition rates, time- integrated concentrations, and depositions that were brought to compact algebraic expressions under the following assumptions:
(i) a uniform wind field over the territory and time of relevance; a vertical fall rate depending on the radii of the particles;
(ii) K-type eddy-diffusion coefficients, which are uniform in space  and time-independent;
(iii) flat terrain, no ground reflection, no inversion layers;
(iv) point-like virtual source above the real source at ground.
The code handles 21 nuclides which are important in abnormal nuclear events. Preliminary intervention zones can be determined rapidly. The program handles nine geographical maps mainly covering South- East Europe.

4. METHOD OF SOLUTION:

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Since essentially a
Gaussian dispersion model is employed, the program may be applied to distances up to a few hundred kilometers from the source, at most. The time scale should be limited to periods of stable meteorological conditions.

6. TYPICAL RUNNING TIME

With an IBM PC/At with 26 MHz clock time and  math co-processor, the following maximum execution times should be expected:
an intervention zone contour: 3 minutes
a concentration/deposition rate contour: 20 seconds
a time-integrated quantity contour: 10 seconds
a pseudo-3D view of territory orography: 1 minute
a map rescaling: 1 minute.

7. UNUSUAL FEATURES OF THE PROGRAM

Interactive operation designed for timely intervention. (Over)simplified inputs based on "best guesses" in order to obtain intervention recommendations quickly. Quick re-iteration possible.

8. RELATED AND AUXILIARY PROGRAMS:

10. REFERENCES

- "Derived Intervention Levels for Application in Controlling
   Radiation Doses to the Public in the Event of a Nuclear Accident
   or Radiological Emergency"
   IAEA Safety Series No. 81, VIENNA, 1986

- Dan V. Vamanu:
  APUD-3.0, Alert and Intervention Oriented Fast Assessment of
  Off-Site Contamination Following Accidental Radioactive Releases
  User's Manual
  RB-39-1991 (June).
- Dan V. Vamanu:
  Models in Radioecology, I. Generic Equations for the Atmospheric
  Dispersion of Radioactive Releases
  RB-34-1990 (November).
- Dan V. Vamanu:
  Models in Radioecology, II. Multis-A Post-Accident Assessment
  Model and Code to Map Time-Integrated Concentrations and
  Depositions
  RB-35-1990 (November).
- Dan V. Vamanu:
  User's Manual
  FT-354-1989 (April).
- Dan V. Vamanu:
  Protracted Releases: Inferring Source Terms and Predicting
  Dispersal
  FT-325-1988 (February).
- D.V. Vamanu:
"Notes on Protracted Releases"

11. MACHINE REQUIREMENTS

IBM PS/2 ; IBM/PC/AT or compatible; EGA;
1 MB of hard disk space. Math co-processor recommended.

NEA-DB ran the test case included in this package on a  DELL 486P33 desktop computer.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

MS-DOS 3.30 or higher. Microsoft QuickBasic 4.0 compiler.

The test case included in this package was run on a PC/80486 under MS-DOS Version 5.0 using the Microsoft QuickBasic interpreter Version 4.5.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

The
permanent data reside in the BASIC code APUD.BAS, which may be changed according to requirements.

15. NAME AND ESTABLISHMENT OF AUTHORS

   Dan V. VAMANU
   Institute for Atomic Physics
   Institute of Nuclear Physics and Engineering
   Department 6
   O.O. Box MG-6
   76900 BUCHAREST, Romania.

File name	File description	Records
IAEA1219_01.001	APUD.INF Information file	58
IAEA1219_01.002	README.EXE Help execution file	0
IAEA1219_01.003	APUD.BAS Source file (Basic)	0
IAEA1219_01.004	OROGRAPH.APD Source file (Basic)	0
IAEA1219_01.005	MAIN.APD Source file (Basic)	0
IAEA1219_01.006	AGEN.BAS Source file (Basic)	0
IAEA1219_01.007	AGEN1.BAS Source file (Basic)	0
IAEA1219_01.008	ROM.NW Input file	0
IAEA1219_01.009	ROM.N Input file	0
IAEA1219_01.010	ROM.NE Input file	0
IAEA1219_01.011	ROM.W Input file	0
IAEA1219_01.012	ROM.CT Input file	0
IAEA1219_01.013	ROM.E Input file	0
IAEA1219_01.014	ROM.SW Input file	0
IAEA1219_01.015	ROM.S Input file	0
IAEA1219_01.016	ROM.SE Input file	0
IAEA1219_01.017	APUD.EXE APUD executable	0
IAEA1219_01.018	DOS file-names	17