last modified: 31-OCT-1986 | catalog | categories | new | search |

NESC9800 PFPL.

PFPL, Puff Plume Atmospheric Radioactive or Toxic Deposition

top ]
1. NAME OR DESIGNATION OF PROGRAM:  PFPL.
top ]
2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
PFPL NESC9800/01 Tested 31-OCT-1986

Machines used:

Package ID Orig. computer Test computer
NESC9800/01 DEC VAX 11/780 DEC VAX 11/780
top ]
3. DESCRIPTION OF PROGRAM OR FUNCTION

PFPL is an interactive transport and diffusion program developed for real-time calculation  of the location and concentration of toxic or radioactive materials  during an accidental release. Deposition calculations are included.   The potential exists at the Savannah River Plant for releases of either toxic gases or radionuclides. The automated system developed  to provide real-time information on the trajectory and concentration of an accidental release consists of meteorological towers, a minicomputer, and a network of terminals called the Weather Information and Display (WIND) System. PFPL which simulates either instantaneous (puff) or continuous (plume) releases is the primary code used at Savannah River for emergency response. In the PFPL model the diffusion process is separated into two phases. In phase I, the Gaussian cloud grows as a function of wind speed and stability class. Near the ground, the vertical concentration becomes logarithmic. Phase II begins when the vertical standard deviation reaches a value of 0.8H, where H is the depth of the atmosphere's turbulent layer. At the horizontal distance from the source where the standard deviation = 0.8H, the material remaining in the cloud is redistributed to a uniform vertical concentration throughout the  mixed-layer. The logarithmic surface layer remains. The basic theory of the model assumes that the dry deposition rate is limited by surface deposition processes and by the rate at which turbulence can bring pollutants down to the surface (deposition) layer. The net effect of the two transfer rates determines the cloud depletion rate and surface concentrations. Depletion of the cloud by rain and radioactive decay is treated as an independent process.
top ]
4. METHOD OF SOLUTION

The fundamental equation solved is the general  advection-diffusion equation, including gravitational settling, rainout, and radioactive decay.
top ]
5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:
top ]
6. TYPICAL RUNNING TIME:
NESC9800/01
To compile and link the source program on a VAX-11/780  computer 3 minutes, 21 seconds of CPU time were required.
top ]
7. UNUSUAL FEATURES OF THE PROGRAM:
top ]
8. RELATED AND AUXILIARY PROGRAMS:
top ]
9. STATUS
Package ID Status date Status
NESC9800/01 31-OCT-1986 Tested at NEADB
top ]
10. REFERENCES:
NESC9800/01, included references:
- AJ. Garrett and C.E. Murphy Jr.:
  A PUFF-PLUME Atmospheric Deposition Model for Use at SRP in
  Emergency Response Situations.
  DP-1595  (May 1981)
top ]
11. MACHINE REQUIREMENTS:
NESC9800/01
Peak working set size: 1000; peak page file size: 1869.
top ]
12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
NESC9800/01 FORTRAN-77
top ]
13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
VMS-4.3 (VAX-11/780)
top ]
14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

Much of the software is specific to the Savannah River Plant environment. VAX/VMS system services, and FORTRAN extensions are used extensively. Data files are provided for demonstration. The software for archiving the required on-line meteorological data is not included. Subroutines used for graphic display of results and operational control of the DEC VT100 and Tektronix terminals in the  terminal network are included. Anyone wishing to use these routines  must make appropriate modifications to the file TERMINALS.DAT. Graphic output on a Tektronix terminal requires the proprietary Tektronix PLOT10 Interactive Graphics Library. The DAT files provided were copied during the afternoon of December 28, 1983. Test runs attempting to use these files should specify release times on or before that date. Any user wishing to obtain numerical output only from the model based on conditions in his locality must supply  appropriate wind data for the program.
top ]
15. NAME AND ESTABLISHMENT OF AUTHORS

         M.M. Pendergast, A.J. Garrett and C.E. Murphy, Jr.
         Savannah River Laboratory
         Aiken, South Carolina 29801
Contact  D.D. Hoel
top ]
16. MATERIAL AVAILABLE
NESC9800/01
File name File description Records
NESC9800_01.001 This information file 106
NESC9800_01.002 PFPL source program FORTRAN 77 8083
NESC9800_01.003 JCL file 6
NESC9800_01.004 Sample run text at NEADB 144
NESC9800_01.005 TERMINALS file at NEADB 2
NESC9800_01.006 ARCIX1.DAT 673
NESC9800_01.007 ARCIX2.DAT 673
NESC9800_01.008 ARCIX3.DAT 673
NESC9800_01.009 CANNED.DAT 135
NESC9800_01.010 DVIDEF.MAR 2
NESC9800_01.011 F5MAP1.DAT 127
NESC9800_01.012 F5MAP2.DAT 93
NESC9800_01.013 F5MAP3.DAT 306
NESC9800_01.014 HRAIX1.DAT 169
NESC9800_01.015 HRAIX2.DAT 169
NESC9800_01.016 HRAIX3.DAT 169
NESC9800_01.017 IDLOCAL.DAT 33
NESC9800_01.018 IDNAME.DAT 96
NESC9800_01.019 ISOCHAIN.DAT 34
NESC9800_01.020 LATLON.DAT 99
NESC9800_01.021 MOSOUT.DAT 2
NESC9800_01.022 SAMPLE.TXT sample problem run 145
NESC9800_01.023 SRPBND.DAT 1608
NESC9800_01.024 SRPRDS.DAT 5367
NESC9800_01.025 STATES.DAT 5367
NESC9800_01.026 TERMINALS.DAT 37
NESC9800_01.027 TVSVDT.DAT 9
top ]
17. CATEGORIES
  • R. Environmental and Earth Sciences

Keywords: accidents, deposition, earth atmosphere, meteorology, radioactive clouds, radionuclide migration.