NESC9860 FTRANS.

1. NAME OR DESIGNATION OF PROGRAM:  FTRANS.

3. DESCRIPTION OF PROGRAM OR FUNCTION

FTRANS (Fractured flow and Transport of RAdioNuclideS) is a two-dimensional finite-element code designed to simulate ground-water flow and transport of radioactive  nuclides in a fractured porous return medium. FTRANS takes into account fluid interactions between the fractures and porous matrix blocks, advective-dispersive transport in the fractures and diffusion in the porous matrix blocks, and chain reactions of radionuclide components. It has the capability to model the fractured system using either the dual-porosity or the discrete- fracture modeling approach or a combination of both. FTRANS can be used to perform two-dimensional near-field or far-field predictive analyses of ground-water flow and to perform risk assessments of radionuclide transport from nuclear waste repository subsystems to the biosphere.

4. METHOD OF SOLUTION:

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Although FTRANS does cannot account for deformation processes which can affect the flow capacity and velocity field.

6. TYPICAL RUNNING TIME:

NEA-DB ran the test cases included in this package on a CDC CYBER 740. Required execution times varied from 4.8 to 38.2 CPU  seconds.

7. UNUSUAL FEATURES OF THE PROGRAM

Because of its general flexibility, it is particularly suited to the study of flow and transport processes around repository return subsystems.

8. RELATED AND AUXILIARY PROGRAMS

FTRANS can be used on its own or in conjunction with other flow codes, such and NETFLO and STFLO (NESC Summary R9852), which are designed to perform preliminary calculations of flow problems using a simplistic steady-state approach and several other simplified assumptions. FTRANS can be used to assess the reliability of the simulation results from NETFLO and STFLO. The STAFAN program (NESC Summary 9850) can be employed to do the coupled fluid flow deformation analysis and provide velocity  input for FTRANS. FTRANS can also be used in conjunction with geochemical codes such as PHR-81 and EQ3/6 (NESC Abstract 886), which provide the distribution coefficient values required in the code's radionuclide transport analysis.

10. REFERENCES:

- INTERA Environmental Consultants, Inc.:
  FTRANS: A Two-Dimensional Code for Simulating Fluid Flow and
  Transport of Radioactive Nuclides in Fractured Rock for Repository
  Performance Assessment
  ONWI-426  (April 1983)

11. MACHINE REQUIREMENTS:  46K words.

The test cases of this package ran on a CDC CYBER 740 computer in 52,000 (octal) words of main storage.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

NOS2.5.1 with compiler FTN4.8+650.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

          P. Huyakorn
          GeoTrans, Inc.
          Office of Nuclear Waste Isolation

          M.J. Golis
          Battelle Project
          Management Division
          505 King Avenue, Columbus, Ohio 43201

File name	File description	Records
NESC9860_01.001	information file	59
NESC9860_01.002	FTRANS source program (FORTRAN-66)	2064
NESC9860_01.003	sample problem 1 input data	24
NESC9860_01.004	sample problem 2A input data	34
NESC9860_01.005	sample problem 2B input data	22
NESC9860_01.006	sample problem 3A input data	22
NESC9860_01.007	sample problem 3B input data	23
NESC9860_01.008	sample problem 4 input data	19
NESC9860_01.009	sample problem 5 input data	20
NESC9860_01.010	sample problem 6 input data	26
NESC9860_01.011	sample problem 1 printed output	1460
NESC9860_01.012	sample problem 2A printed output	2643
NESC9860_01.013	sample problem 2B printed output	2200
NESC9860_01.014	sample problem 3A printed output	2200
NESC9860_01.015	sample problem 3B printed output	2820
NESC9860_01.016	sample problem 4 printed output	4154
NESC9860_01.017	sample problem 5 printed output	6594
NESC9860_01.018	sample problem 6 printed output	3468