Computer Programs

CCC-0584 CHAINT-MC.

CCC-0584 CHAINT-MC.

CHAINT-MC, 2-D Radionuclide Transport in Fractured Porous Medium

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: CHAINT-MC (A Two-Dimensional Model
for the Analysis of Contaminant Transport in a Fractured Porous
Medium).

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2. COMPUTERS

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Program name	Package id	Status	Status date
CHAINT-MC	CCC-0584/01	Tested	15-OCT-1993

Machines used:

Package ID	Orig. computer	Test computer
CCC-0584/01	CRAY X-MP	CRAY-XMS

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3. DESCRIPTION OF PROGRAM OR FUNCTION

CHAINT-MC is a two-dimensional finite element model applicable to the transport of a dissolved radionuclide in a fractured porous medium along with radioactive chain decay and subsequent transport of the dissolved daughters.

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4. METHOD OF SOLUTION

The conceptual modeling approach is based on representing the space domain by a vertical cross section. The mathematical model embodied by CHAINT is based on the physical law of conservation of mass. Physical processes accounted for in the model include advection, diffusion, dispersion, and retardation along with mass decay and production/injection.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

In generating a
two-dimensional finite element mesh, the following guidelines should be used: a) quadrilateral elements should be used for most of the mesh; b) element aspect ratios should not exceed roughly 100; c) midside nodes should be located in the middle third of the element side or length; d) the element numbering sequence should be continuous and should begin along the side of the grid with the fewest elements.

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6. TYPICAL RUNNING TIME

The code was tested on a Cray XMP under the CTSS operating system. The sample problem took less than .4 second of CPU time.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS:

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9. STATUS

Package ID	Status date	Status
CCC-0584/01	15-OCT-1993	Tested at NEADB

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10. REFERENCES

  B. Sagar, P. Eslinger and R.G. Baca,
  Probabilistic Modeling of Radionuclide Release at the Waste
  Package Subsystem Boundary of a Repository in Basalt,
  Nuclear Technology, Vol. 75, pp. 338-347, December 1986.

CCC-0584/01, included references:

- Niall W. Kline and Robert G. Baca:
  CHAINT Computer Code - Users Guide
  RHO-BW-CR-144 P, Rockwell International Richland, Washington
  (December 1985).

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11. MACHINE REQUIREMENTS: The code will run on the Cray computers.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
CCC-0584/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

The code is written in FORTRAN 77. On the Cray, the compiler used was CFT under the CTSS operating system.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

  Battelle Pacific Northwest Laboratories
  Richland
  Washington, U.S.A.

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16. MATERIAL AVAILABLE

CCC-0584/01

File name	File description	Records
CCC0584_01.001	Information file	48
CCC0584_01.002	JCL for running the sample problem	4
CCC0584_01.003	chaint.f CHAINT-MC FORTRAN 77	7282
CCC0584_01.004	subr.f Dummy subrs and subrs RDISK and WDISK	35
CCC0584_01.005	cha.inp Sample problem input	101
CCC0584_01.006	cha.out Sample problem output	298

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17. CATEGORIES

R. Environmental and Earth Sciences

Keywords: porous materials, radioactive decay, radionuclide migration.