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ESTS0331 MESORAD1.4. (Abstract last modified 22-MAR-1995)


MESORAD, Emergency Response Airborne Dose Assessment

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Abstract Table of Contents:

NAME | COMPUTER | PROBLEM | SOLUTION | RESTRICTIONS | CPU | FEATURES | AUXILIARIES | STATUS | REFERENCES | REQUIREMENTS | LANGUAGE | OPERATING SYSTEM | OTHER RESTRICTIONS | AUTHOR | MATERIAL | CATEGORIES |

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1. NAME OR DESIGNATION OF PROGRAM - MESORAD1.4, emergency response dose assesment. 


2. COMPUTER FOR WHICH PROGRAM IS DESIGNED AND OTHER MACHINE VERSION PACKAGES AVAILABLE -

To request or retrieve programs click on the one of the active versions below. A password and special authorization is required.

Explanation of the status codes.

Program-name         Package-ID  Status
MESORAD1.4           ESTS0331/01 Tested

Machines used:
Package-ID     Orig.Computer                       Test Computer
ESTS0331/01    DEC VAX 11/780                      DEC VAX 6000

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.


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.


5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM - MESORAD is designed to accommodate up to 50 radionuclides.


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.


7. UNUSUAL FEATURES OF THE PROGRAM - 


8. RELATED AND AUXILIARY PROGRAMS - MESORAD was developed from version 2.0 of the MESOI atmospheric dispersion model (NESC 9862) retaining its modular nature.


9. STATUS
ESTS0331/01: 22-MAR-1995 Tested at NEADB


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:
- 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).


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


12. PROGRAMMING LANGUAGE(S) USED -
ESTS0331/01: FORTRAN-77 


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.


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.


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


16. MATERIAL AVAILABLE -
ESTS0331/01:
ESTS0331_01.001   MESORAD Information File                          401 records
ESTS0331_01.002   MESORAD FORTRAN source file                      7302 records
ESTS0331_01.003   Program to prepare a Run Specification File       608 records
ESTS0331_01.004   Program to prepare a Release File                 108 records
ESTS0331_01.005   Program to prepare a Meteorolog. Data File         52 records
ESTS0331_01.006   Program to generate printer data file             711 records
ESTS0331_01.007   Include File CHECK                                 31 records
ESTS0331_01.008   Include File CIGMAT                                22 records
ESTS0331_01.009   Include File CIGTER                                22 records
ESTS0331_01.010   Include File CYL                                   27 records
ESTS0331_01.011   Include File DATIM                                 27 records
ESTS0331_01.012   Include File DIFTER                                23 records
ESTS0331_01.013   Include File DOSE                                  57 records
ESTS0331_01.014   Include File FPUFF                                 20 records
ESTS0331_01.015   Include File GENERL                                40 records
ESTS0331_01.016   Include File MATRIX                                26 records
ESTS0331_01.017   Include File METEOR                                40 records
ESTS0331_01.018   Include File NUC                                   45 records
ESTS0331_01.019   Include File PARAM                                 24 records
ESTS0331_01.020   Include File PRT                                   27 records
ESTS0331_01.021   Include File PUFFS                                 30 records
ESTS0331_01.022   Include File REL                                   26 records
ESTS0331_01.023   Include File TOPOGR                                24 records
ESTS0331_01.024   Include File UNITS                                 29 records
ESTS0331_01.025   Include File WFMOD                                 20 records
ESTS0331_01.026   MESORAD executable file                             0 records
ESTS0331_01.027   Sample input file - problem 1                      29 records
ESTS0331_01.028   Sample input file - problem 2                      22 records
ESTS0331_01.029   Meteorological data file 1 (to run prob. 1)         0 records
ESTS0331_01.030   Meteorological data file 3 (to run prob. 2)         0 records
ESTS0331_01.031   Release Data File                                   3 records
ESTS0331_01.032   Radionuclide Data File                            214 records
ESTS0331_01.033   Sample output file (problem 2)                    604 records
ESTS0331_01.034   Sample output file (problem 2)                    924 records
ESTS0331_01.035   PRNT output on file AIRNDP_MAR16_1030.CUM         295 records
ESTS0331_01.036   PRNT output on file AIRNDP_MAR16_1030.CUM          61 records
ESTS0331_01.037   MESORAD output description                         60 records


17. CATEGORIES  - 

- G.  Radiological Safety, Hazard and Accident Analysis


Keywords: ATMOSPHERIC PRECIPITATIONS, DEPOSITION, DISPERSIONS, METEOROLOGY, NUCLEAR POWER PLANTS, RADIATION DOSES, RADIONUCLIDE MIGRATION

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