NESC0600 EGAD
EGAD, Ground Level Gamma Doses Function of Gamma Energy for Radioactive Releases
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, REFERENCE, 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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| Program name | Package id | Status | Status date |
|---|---|---|---|
| EGAD | NESC0600/01 | Tested | 26-AUG-1982 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NESC0600/01 | IBM 3033 | IBM 3033 |
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3. DESCRIPTION OF PROBLEM OR FUNCTION
EGAD calculates gamma dose
integrals to a ground level receptor, for incremental values of
the vertical dispersion parameter sigma-z, as a function of gamma
energy and spatial distribution of the radioactive material. The
dose integrals are representative of sector averages since the
distribution of material is assumed to be Gaussian in the
vertical, homogeneous in the horizontal, and bounded between
ground level and an inversion lid. Calculated dose integrals are
independent of radioactive decay, transport velocity, downwind
distance, and sector width. Space attenuation and buildup are
taken into account.
EGAD calculates gamma dose
integrals to a ground level receptor, for incremental values of
the vertical dispersion parameter sigma-z, as a function of gamma
energy and spatial distribution of the radioactive material. The
dose integrals are representative of sector averages since the
distribution of material is assumed to be Gaussian in the
vertical, homogeneous in the horizontal, and bounded between
ground level and an inversion lid. Calculated dose integrals are
independent of radioactive decay, transport velocity, downwind
distance, and sector width. Space attenuation and buildup are
taken into account.
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4. METHOD OF SOLUTION
The plume of radioactive material is assumed
to remain constant in shape and size during passage over a
receptor point. The space distribution of material is then
represented as parallel line sources. The line contributions are
integrated analytically by transforming to Bessel and related
functions, reducing the spatial distribution to a vertical plane
at the receptor point. Plane integrations are then performed by
Gaussian quadratures.
The plume of radioactive material is assumed
to remain constant in shape and size during passage over a
receptor point. The space distribution of material is then
represented as parallel line sources. The line contributions are
integrated analytically by transforming to Bessel and related
functions, reducing the spatial distribution to a vertical plane
at the receptor point. Plane integrations are then performed by
Gaussian quadratures.
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7. UNUSUAL FEATURES OF THE PROGRAM
EGAD provides an efficient means
of compiling tabular data of dose integrals as a function of
incremental values of energy and the vertical dispersion
parameter. These data may then be interpolated for specific
values of the variables resulting in large computational savings
if large amounts of meteorology data are to be processed.
EGAD provides an efficient means
of compiling tabular data of dose integrals as a function of
incremental values of energy and the vertical dispersion
parameter. These data may then be interpolated for specific
values of the variables resulting in large computational savings
if large amounts of meteorology data are to be processed.
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NESC0600/01, included references:
- R.E. Cooper:EGAD - A Computer Program to Compute Dose Integrals from External
Gamma Emitters
DP-1304 (September 1972)
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NESC0600/01
| File name | File description | Records |
|---|---|---|
| NESC0600_01.003 | EGAD INFORMATION FILE | 29 |
| NESC0600_01.004 | EGAD SOURCE PROGRAM (FORTRAN-4) | 222 |
| NESC0600_01.005 | EGAD INPUT DATA FOR TEST CASE | 6 |
| NESC0600_01.006 | EGAD OUTPUT OF TEST CASE | 29 |
| NESC0600_01.007 | EGAD JCL FOR TEST CASE | 11 |
Keywords: dose rates, gamma radiation, radioactivity.