NEA-0843 RANCH.

1. NAME OR DESIGNATION OF PROGRAM:  RANCH.

3. DESCRIPTION OF PROBLEM OR FUNCTION

One-dimensional transport of radionuclide chains through layered geological media, taking into account longitudinal dispersion, convection and retention.

4. METHOD OF SOLUTION

Semi-analytical solution by Laplace transform.
Convolution integrals.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maximum 4 nuclides and 10 layers. Peclet number large compared to 1.

6. TYPICAL RUNNING TIME

Depending on problem specification, typically 10 to 500 seconds.

NEA-DB ran the test cases included in this package on a VAX 8810 computer. The following CPU times were required:
BOE1093: 37s; GV1A: 3m15s; GVEA1: 1m36s; SEDI_3_18: 2m09s.

7. UNUSUAL FEATURES OF THE PROGRAM

Arbitrary concentration boundary,  restart possibilities.

8. RELATED AND AUXILIARY PROGRAMS

CONZRA to calculate concentration boundary from injection rate. RANCHT to define time steps in the RANCH calculation.

10. REFERENCES

- J. Hadermann and J. Patry
   Nucl. Technol. 54 (1981) 266.
   EIR-Internal Technical Report TM-RZ-70. TM-15-80-2.

- J. Hadermann and F. Roesel:
  Radionuclide Chain Transport in Inhomogeneous Crystalline Rocks
  Limited Matrix Diffusion and Effective Surface Sorption
  Technical Report 85-40 (February 1985).
- R.W. Hartley:
  Release of Radionuclides to the Geosphere from a Repository for
  High-Level Waste-Mathematical Model and Results
  EIR-Bericht Nr. 554 (February 1985).
- J. Hadermann and A. Jakob:
  Modelling Small Scale Infiltration Experiments into Bore Cores of
  Crystalline Rock and Break-Through Curves
  EIR-Bericht Nr. 622 (April 1987).
- RANCHMD - Radio Nuclide Chain Transport with Matrix Diffusion
  (Version: February 1990).

11. MACHINE REQUIREMENTS

Variable main storage requirements, depending on problem specification. Typically CM100,000 to CM140,000. Disk files TAPE 11, TAPE12, TAPE13.
The execution of the test case on CDC CYBER 175 requires 140,000 octal words of main storage.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
SCOPE 3.4.1/NOS-BE.

VMS V5.3 (VAX 8810).

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
CDC accuracy is required.

15. NAME AND ESTABLISHMENT OF AUTHOR

J. Patry and J. Hadermann
Swiss Federal Institute for Reactor Research
CH-5303 Wuerenlingen, Switzerland.

File name	File description	Records
NEA0843_04.001	Information file	87
NEA0843_04.002	Command file to compile and link RANCHMD	4
NEA0843_04.003	Command file to run case BOE1093	36
NEA0843_04.004	Command file to run case GV1A	36
NEA0843_04.005	Command file to run case GV3A1	36
NEA0843_04.006	Command file to run case SEDI_3_18	36
NEA0843_04.007	Input data file when the flaf IQART=1	1652
NEA0843_04.008	Input data file for sample problem BOE1093	17
NEA0843_04.009	Input data file for sample problem GV1A	45
NEA0843_04.010	Input data file for sample problem GV3A1	54
NEA0843_04.011	Input data file for sample problem SEDI_3_18	66
NEA0843_04.012	Main source file	813
NEA0843_04.013	First module of the program	2022
NEA0843_04.014	Second module of the program	1545
NEA0843_04.015	Third module of the program	1085
NEA0843_04.016	Executable file of RANCHMD	130
NEA0843_04.017	Plot data for the case BOE1093	250
NEA0843_04.018	Plot data for the case GV1A	1000
NEA0843_04.019	Plot data for the case GV3A1	1552
NEA0843_04.020	Plot data for the case SEDI_3_18	1096
NEA0843_04.021	BOE1093 sample output	340
NEA0843_04.022	GV1A sample output	1227
NEA0843_04.023	GV3A1 sample output	1736
NEA0843_04.024	SEDI_3_18 sample output	1314