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NESC9862 MESOI2.0.

MESOI2.0, Atmospheric Transport of Effluent Puffs

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1. NAME OR DESIGNATION OF PROGRAM:  MESOI2.0.
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2. COMPUTERS
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Program name Package id Status Status date
MESOI2.0 NESC9862/01 Tested 05-FEB-1990

Machines used:

Package ID Orig. computer Test computer
NESC9862/01 DEC VAX 11/780 DEC VAX 8810
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3. DESCRIPTION OF PROGRAM OR FUNCTION

MESOI version 2.0 is an interactive Lagrangian puff model for estimating the transport, diffusion, deposition, and decay of effluents released to the atmosphere. The model is capable of treating simultaneous releases from as many as four release points, which may be either at elevated locations or at ground-level. The puffs are advected by a horizontal wind field that is defined in three dimensions. The wind field may be adjusted for expected topographic effects.
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4. METHOD OF SOLUTION

The concentration distribution within the puffs is initially assumed to be Gaussian in the horizontal and vertical directions. However, the vertical concentration distribution is modified by assuming reflection at the ground and the top of the atmospheric mixing layer. Material is deposited on the surface using a source depletion, dry deposition model and a washout coefficient model. The model also treats the decay of a primary effluent species and the ingrowth and decay of a single daughter species using a first-order decay process.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
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6. TYPICAL RUNNING TIME:
NESC9862/01
NEA-DB implemented the program on a VAX 8810 computer.  No test case could be run, however, since no interactive input was available.
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7. UNUSUAL FEATURES OF THE PROGRAM:
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8. RELATED AND AUXILIARY PROGRAMS

MESOI2.0 is based on the earlier MESOI versions 1.0 and 1.1 and the MESODIF model prepared originally by Start and Wendell for the National Reactor Testing Station. The main reasons for version 2.0 were to incorporate the processes that  alter and deplete effluents and to provide a more realistic treatment of the wind field that transports the effluents. MESOI2.0  uses routines from the proprietary CalComp graphics library to obtain graphic output; these routines are not included and will have to be replaced with suitable local alternatives.
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9. STATUS
Package ID Status date Status
NESC9862/01 05-FEB-1990 Screened
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10. REFERENCES

- J.V. Ramsdell and G.F. Athey
  MESOI: AN Interactive Lagrangian Trajectory Puff Diffusion Model,
  PNL-3998, December 1981.
- G.F. Athey, K.J. Allwine, and J.V. Ramsdell
  User's Guide to the MESOI Diffusion Model and to the Utility
  Programs UPDATE and LOGRVU,
  PNL-3999, November 1981.
- G.F. Athey and J.V. Ramsdell
  User's Guide to the MESOI Diffusion Model: Version 1.1 (for Data
  General Eclipse S/230 with AFOS),
  PNL-4369, September 1982.
NESC9862/01, included 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)
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11. MACHINE REQUIREMENTS:  155K bytes.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC9862/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  VMS.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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15. NAME AND ESTABLISHMENT OF AUTHORS

          J.V. Ramsdell, G.F. Athey, and C.S. Glantz
          Pacific Northwest Laboratory
          Richland, WA 99352
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16. MATERIAL AVAILABLE
NESC9862/01
File name File description Records
NESC9862_01.001 Information file 129
NESC9862_01.002 MESOI.FOR 258
NESC9862_01.003 ALPHA.FOR 36
NESC9862_01.004 ARRIVN.FOR 144
NESC9862_01.005 ARRTIM.FOR 75
NESC9862_01.006 ASCND.FOR 51
NESC9862_01.007 CLEAN.FOR 105
NESC9862_01.008 DATRD.FOR 63
NESC9862_01.009 DATWR.FOR 47
NESC9862_01.010 DIFDEP.FOR 380
NESC9862_01.011 DIRSPD.FOR 62
NESC9862_01.012 DTCHAR.FOR 78
NESC9862_01.013 DTOPO.FOR 142
NESC9862_01.014 EXPSUM.FOR 90
NESC9862_01.015 FILOPN.FOR 56
NESC9862_01.016 GRIDIN.FOR 237
NESC9862_01.017 INIT.FOR 176
NESC9862_01.018 JULIAN.FOR 39
NESC9862_01.019 LOCATE.FOR 162
NESC9862_01.020 MODEND.FOR 96
NESC9862_01.021 PLMRIZ.FOR 100
NESC9862_01.022 PLOTZ.FOR 111
NESC9862_01.023 PRINTE.FOR 101
NESC9862_01.024 PUFFM.FOR 106
NESC9862_01.025 PUFFR.FOR 55
NESC9862_01.026 RDK.FOR 55
NESC9862_01.027 RDKIN.FOR 77
NESC9862_01.028 REARNG.FOR 40
NESC9862_01.029 RELEAS.FOR 259
NESC9862_01.030 SCREEN.FOR 158
NESC9862_01.031 SHIFT.FOR 44
NESC9862_01.032 STRAY.FOR 55
NESC9862_01.033 TERRA.FOR 144
NESC9862_01.034 TESTM.FOR 61
NESC9862_01.035 TOPFIL.FOR 80
NESC9862_01.036 WIND.FOR 155
NESC9862_01.037 WINSPD.FOR 56
NESC9862_01.038 WNDFLD.FOR 156
NESC9862_01.039 WNDPLT.FOR 151
NESC9862_01.040 DUMMY.FOR 9
NESC9862_01.041 ASIG.FOR 82
NESC9862_01.042 BSIG.FOR 75
NESC9862_01.043 DSIG.FOR 85
NESC9862_01.044 NRCSIG.FOR 80
NESC9862_01.045 ARRIV.INC 18
NESC9862_01.046 CHAR.INC 21
NESC9862_01.047 CONST.INC 22
NESC9862_01.048 DATIM.INC 26
NESC9862_01.049 DECAY.INC 20
NESC9862_01.050 MATRIX.INC 20
NESC9862_01.051 PUFFS.INC 21
NESC9862_01.052 REL.INC 23
NESC9862_01.053 STATN.INC 19
NESC9862_01.054 TOPOGR.INC 16
NESC9862_01.055 UNITS.INC 23
NESC9862_01.056 WINDS.INC 21
NESC9862_01.057 OBSDAT.DAT 144
NESC9862_01.058 CHKPNT.DAT 35
NESC9862_01.059 HNFTEL.DAT 22
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17. CATEGORIES
  • R. Environmental and Earth Sciences

Keywords: deposition, diffusion, environmental transport, interactive computing, meteorology, nuclear facilities, point sources, radioactive effluents.