Computer Programs

NEA-0493 PLUDOS.

NEA-0493 PLUDOS.

PLUDOS, Ground Level Gamma Dose from Radioactive Release at Various Heights

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, AUXILIARIES, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: PLUDOS.

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2. COMPUTERS

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Program name	Package id	Status	Status date
PLUDOS	NEA-0493/01	Tested	01-NOV-1977

Machines used:

Package ID	Orig. computer	Test computer
NEA-0493/01	IBM 370 series	IBM 370 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

Calculation of the ground level external gamma radiation dose from a radioactive gaseous effluent.
Height of the release, attenuation by the air and radioactive decay are taken into account.

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4. METHOD OF SOLUTION

The plume having Gaussian cross-wise and vertical distributions of activity is replaced by a set of line sources diverging from the stack top. The dose rate from a single line is obtained using QUAD (which is based on Simpson's rule) and the total dose rate obtained by the summing of the line dose rates to convergence.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The program must be re-submitted for each weather category.

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6. TYPICAL RUNNING TIME: About 2 sec. per dose/rate calculated.

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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

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8. RELATED OR AUXILIARY PROGRAMS: RELATED AND AUXILIARY PROGRAMS

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9. STATUS

Package ID	Status date	Status
NEA-0493/01	01-NOV-1977	Tested at NEADB

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10. REFERENCES

NEA-0493/01, included references:

- J.Allen and F.Abbey,
"PLUDOS, A Fortran Program to Calculate the Ground
Level Entrance Gamma Dose from a Radioactive Plume"
February 1973.

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11. MACHINE REQUIREMENTS

   120 kbytes core storage
   3 magnetic tapes
   1 printer having 133 positions.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0493/01	FORTRAN-IV

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: 7-J.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

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15. NAME AND ESTABLISHMENT OF AUTHOR

J.Allen and F. Abbey
Theoretical & Computing Section
S.R.D. Culcheth
Wigshaw Lane
Culcheth
Warrington
United Kingdom.

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16. MATERIAL AVAILABLE

NEA-0493/01

File name	File description	Records
NEA0493_01.001	SOURCE PROGRAM - F4 - EBCDIC	985
NEA0493_01.002	JCL	5
NEA0493_01.003	SAMPLE PROBLEM INPUT DATA	12
NEA0493_01.004	SAMPLE PROBLEM PRINTED OUTPUT	108

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17. CATEGORIES

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

Keywords: doses, gamma radiation, gaseous wastes, plumes, radioactive aerosols.