ESTS0331 MESORAD1.4.

MESORAD1.4, Emergency Response Airborne Dose Assessment

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM 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, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: MESORAD1.4

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.

Program name	Package id	Status	Status date
MESORAD1.4	ESTS0331/01	Tested	22-MAR-1995

Machines used:

Package ID	Orig. computer	Test computer
ESTS0331/01	DEC VAX 11/780	DEC VAX 6000

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3. DESCRIPTION OF PROGRAM OR FUNCTION

MESORAD1.4 is a dose assessment model for emergency response applications. Dose pathways represented in the model are those that are most likely to be important during and immediately following a release (hours) rather than over an extended time frame (days or weeks). The doses computed include: external dose resulting from exposure to radiation emitted by radionuclides in the air and deposited on the ground, internal dose commitments resulting from inhalation, and total whole-body dose. Three preprocessors are included with MESORAD. RSFPREP generates the MESORAD run specification (input) file, METWR creates the meteorological data file, and RELPREP prepares the release definition file. PRNT is a postprocessor for generating printer or screen-compatible output. All four programs run interactively.

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4. METHOD OF SOLUTION

External doses from airborne material are computed using semi-infinite and finite cloud approximations. When the dimensions of the puff become large in comparison with the mean free paths of gamma radiation emitted from radionuclides in the puff, the semi-infinite cloud model is used. Otherwise, the finite puff model is applied. The finite puff model is an approximation to the point-kernel integration technique which reduces dose computation times. Atmospheric processes are represented by a combination of Lagrangian puff and Gaussian plume dispersion models, a source depletion (deposition velocity) dry deposition model, and a wet deposition model using washout coefficients based on precipitation rates. Dose assessment calculations occur simultaneously with the atmospheric dispersion and deposition calculations.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

MESORAD is designed to accommodate up to 50 radionuclides.

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6. TYPICAL RUNNING TIME

Model execution proceeds at a nominal rate of approximately 1 minute per hour simulated for a continuous release. The two sample problems require about 8 or 9 CPU seconds, respectively, on a DEC VAX6220.

ESTS0331/01

The sample problems were executed at the NEA Data Bank on a DEC VAX 6000/510 computer in about 2.3 and 3.5 seconds, respectively.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS

MESORAD was developed from version 2.0 of the MESOI atmospheric dispersion model (NESC 9862) retaining its modular nature.

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9. STATUS

Package ID	Status date	Status
ESTS0331/01	22-MAR-1995	Tested at NEADB

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10. REFERENCES

- J.V. Ramsdell, G.F. Athey, and C.S. Glantz, MESOI Version 2.0: An
Interactive Mesoscale Lagrangian Puff Dispersion Model with
Deposition and Decay, NUREG/CR-3344 (PNL-4753), November 1983.

ESTS0331/01, included references:

- R.I. Scherpelz et al.:
  The MESORAD Dose Assessment Model
  Volume 1: Technical Basis
  NUREG/CR-4000, PNL-5219 RH (January 1986).
- J.V. Ramsdell et al.:
  The MESORAD Dose Assessment Model
  Volume 2: Computer Code
  NUREG/CR-4000, PNL-5219 (September 1988).
- M. Birgersson:
  MESORAD1.4 Tape Description and Implementation Information
  NESC Note 92-01 (October 2, 1991).

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11. MACHINE REQUIREMENTS: 1.1 Mbytes on a DEC VAX6220.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
ESTS0331/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: VMS.

ESTS0331/01

The program MESORAD was executed at the NEA Data Bank on a VAX 6000/510 computer running Open VMS V6.1.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

File
MROUT.FMT, which describes the MESORAD output format, was created using a text editor and is read by subroutine OUT2 in PRNT. Volume 3 of the reference report, which was intended to describe the auxiliary programs, was never written.

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15. NAME AND ESTABLISHMENT OF AUTHORS: J.V. Ramsdell
Pacific Northwest Laboratory

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16. MATERIAL AVAILABLE

ESTS0331/01

File name	File description	Records
ESTS0331_01.001	MESORAD Information File	401
ESTS0331_01.002	MESORAD FORTRAN source file	7302
ESTS0331_01.003	Program to prepare a Run Specification File	608
ESTS0331_01.004	Program to prepare a Release File	108
ESTS0331_01.005	Program to prepare a Meteorolog. Data File	52
ESTS0331_01.006	Program to generate printer data file	711
ESTS0331_01.007	Include File CHECK	31
ESTS0331_01.008	Include File CIGMAT	22
ESTS0331_01.009	Include File CIGTER	22
ESTS0331_01.010	Include File CYL	27
ESTS0331_01.011	Include File DATIM	27
ESTS0331_01.012	Include File DIFTER	23
ESTS0331_01.013	Include File DOSE	57
ESTS0331_01.014	Include File FPUFF	20
ESTS0331_01.015	Include File GENERL	40
ESTS0331_01.016	Include File MATRIX	26
ESTS0331_01.017	Include File METEOR	40
ESTS0331_01.018	Include File NUC	45
ESTS0331_01.019	Include File PARAM	24
ESTS0331_01.020	Include File PRT	27
ESTS0331_01.021	Include File PUFFS	30
ESTS0331_01.022	Include File REL	26
ESTS0331_01.023	Include File TOPOGR	24
ESTS0331_01.024	Include File UNITS	29
ESTS0331_01.025	Include File WFMOD	20
ESTS0331_01.026	MESORAD executable file	0
ESTS0331_01.027	Sample input file - problem 1	29
ESTS0331_01.028	Sample input file - problem 2	22
ESTS0331_01.029	Meteorological data file 1 (to run prob. 1)	0
ESTS0331_01.030	Meteorological data file 3 (to run prob. 2)	0
ESTS0331_01.031	Release Data File	3
ESTS0331_01.032	Radionuclide Data File	214
ESTS0331_01.033	Sample output file (problem 2)	604
ESTS0331_01.034	Sample output file (problem 2)	924
ESTS0331_01.035	PRNT output on file AIRNDP_MAR16_1030.CUM	295
ESTS0331_01.036	PRNT output on file AIRNDP_MAR16_1030.CUM	61
ESTS0331_01.037	MESORAD output description	60