CCC-0633 BLT.

1. NAME OR DESIGNATION OF PROGRAM:  BLT

3. DESCRIPTION OF PROGRAM OR FUNCTION

The BLT code solves for release and transport of contaminants from containerized wastes. Each container may have unique properties (i.e., time to failure or localized failure, e.g. pitting) and each waste form may have unique release properties. Release from the waste form is limited by one of four physical or chemical constraints: solubility, diffusion, dissolution, and surface wash-off with partitioning. The release from the waste form acts as a source for transport in the advection/dispersion equation. Transport is modeled in two-dimensions through the groundwater pathway from subsurface disposal.

4. METHOD OF SOLUTION

The advection/dispersion transport equation with spatially varying sources (waste forms) is solved in two-dimensions using the method of finite elements. Advancements in  time is controlled by user supplied input. It is recommended to use  the fully implicit backward Euler scheme. However, Cranck-Nicolson and explicit time step algorithms are provided. Radioactive decay and sorption processes are included in the model. Container performance is calculated through empirical correlations and user supplied input data. Waste form release characteristics are simulated with geometry dependent (rectangular or cylindrical waste  forms) analytical solutions to the diffusion equation. Dissolution is modeled through an input value specifying the dissolution rate. Rinse release with partitioning is simulated with user supplied values. In all cases, checks are made to prevent solubility limits from being exceeded.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Two-dimensional.
Maximum problem size is 500 time steps and 400 computational points. These can be readjusted by redimensioning the code.
Maximum number of waste containers and waste forms is 100.* Maximum number of materials is 10 (i.e., number of regions with different transport properties).
Maximum number of different container and waste form types is 20.
Simulates only a single-species.
Changes in chemistry over time are not modeled.

6. TYPICAL RUNNING TIME

For a problem with 120 computational points and 100 time steps, run time is approximately 50 seconds on a
486/50.

The programs were tested at the NEA/DB on a PC Optiplex GXM 5100 equipped with a Pentium processor of 99 MHz and 32 MByte of extended memory. The running time for all the BLT sample problems is a few seconds. The execution time required to run the program FEMWATER is also of a few seconds.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

FEMWATER - two-dimensional finite-element program that calculates unsaturated/saturated water flow in subsurface media. This program was developed at Oak Ridge National Laboratory. Only minor modifications to permit the code to run under DOS instead of a VMS system were performed on this code.
GRAFBLT - graphics post-processor to view code output. REDIMGRD - program to take the larger grid domain used to calculate  water flow and recalculate a new smaller grid used for examining the source term region in detail.
Note: BLT is an extension of the code FEMWASTE originally developed  at Oak Ridge National Laboratory and available from RSIC as CCC-0451. BLT uses the contaminant transport routines supplied by FEMWASTE and has extended capabilities to model container and waste  form performance.

10. REFERENCES

- G.T. Yeh and D.S. Ward:
  FEMWASTE: A Finite Element Model of Waste Transport through
  Saturated-Unsaturated Porous Media
  ORNL-5601 (April 1981)
- G.T. Yeh and D.S. Ward:
  FEMWATER: A Finite Element Model of Water Flow through
  Saturated-Unsaturated Porous Media
  ORNL-5567 (October 1980)
- C.J. Suen and T.M. Sullivan:
  Sensitivity Analysis and Benchmarking of the BLT Low-Level Waste
  Source Term Code
  NUREG/CR-5943, BNL-NUREG-52346 (1993)
- T.M. Sullivan and C.J. Suen:
  Low-Level Waste Source Term Model Development and Testing
  NUREG/CR-5681, BNL-NUREG-52280 (May 1991)

- T.M. Sullivan and C.J. Suen:
  Low-Level Waste Shallow Land Disponsal Source Term Model: Data
  Input Guides
  NUREG/CR-5387, BNL-NUREG-52206 (July 1989)

11. MACHINE REQUIREMENTS

An IBM PC or compatible with a minimum of a
386 processor. 500K of available conventional memory is required for execution. Approximately 4MB of disk space is required for installation. A color monitor is recommended for better contour differentiation.

The filesizes of the executables created using the Lahey compiler, using the option '-stub runb' during linkage are: BLT.EXE - 638 Kbyte; GRAFBLT.EXE - 313 Kbyte; FEMWATER.EXE - 650 Kbyte; REDIMGRD.EXE - 374 Kbyte.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

Lahey Fortran 5.0 was used to create the executable included in the package which were tested at RSIC both in a DOS window of Windows 95 and under MS-DOS 6.22. The graphics program. GRAFBLT, was compiled using the LAHEY FORTRAN version 5.0 graphics library. The program should automatically detect the graphics capability of the monitor. It has  been tested on color monitors (SVGA) and black and white monitors (Hercules graphics card). However, the contour plotting routines in  GRAFBLT rely on color to differentiate between contours. Other routines work acceptably on black and white monitors.

The programs were tested at the NEA/DB on a PC Optiplex GXM 5100 equipped with a Pentium processor of 99 MHz and 32 MByte of extended memory, under MS-DOS 6.2. The Lahey FORTRAN-77 compiler F77L/EM-32 Version 5.20 and linker (Version 5.1) were used respectively to compile the source files and create the executables. The graphics subroutines of the Lahey GRAPHORIA library have been linked to created the executable of program GRAFBLT.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. NAME AND ESTABLISHMENT OF AUTHORS

Contributed by: Radiation Safety Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, U. S. A.

Developed by:   Brookhaven National Laboratory, Upton, NY, U.S.A.

File name	File description	Records
CCC0633_01.001	Information file of package BLT	430
CCC0633_01.002	Source file of program BLT	5784
CCC0633_01.003	Source file of auxiliary program GRAFBLT	1505
CCC0633_01.004	Author's executable file of program BLT	0
CCC0633_01.005	Author's executable file of program GRAFBLT	0
CCC0633_01.006	Instructions on using the waste form Kd mode	168
CCC0633_01.007	Source file (part 1) of program FEMWATER	1133
CCC0633_01.008	Source file (part 2) of program FEMWATER	1096
CCC0633_01.009	Source file (part 3) of program FEMWATER	1049
CCC0633_01.010	Source file (part 4) of program FEMWATER	1108
CCC0633_01.011	Source file of auxiliary program REDIMGRD	302
CCC0633_01.012	Author's executable file of program FEMWATER	0
CCC0633_01.013	Author's executable file of program REDIMGRD	0
CCC0633_01.014	FEMWATER input deck, problem NUREG/CR-5387	149
CCC0633_01.015	FEMWATER main output file pb. NUREG/CR-5387	1730
CCC0633_01.016	FEMWATER aux. output file pb. NUREG/CR-5387	1196
CCC0633_01.017	FEMWATER aux. output file pb. NUREG/CR-5387	596
CCC0633_01.018	Auxiliary file	35
CCC0633_01.019	FEMWATER auxiliary input file	293
CCC0633_01.020	FEMWATER auxiliary input file for BLTTEST	596
CCC0633_01.021	Input deck for problem in NUREG/CR-5387	66
CCC0633_01.022	Input deck for sample problem INPR7A	43
CCC0633_01.023	Input deck for sample problem INPR7FD	43
CCC0633_01.024	Input deck for sample problem TESTKD	45
CCC0633_01.025	BLT output file for sample problem BLTTEST	2140
CCC0633_01.026	BLT output file for sample problem INPR7A	2300
CCC0633_01.027	BLT output file for sample problem INPR7FD	3700
CCC0633_01.028	BLT output file for sample problem TESTKD	2522
CCC0633_01.029	BLT restart file for sample problem BLTTEST	1853
CCC0633_01.030	BLT restart file for sample problem INPR7A	635
CCC0633_01.031	BLT restart file for sample problem INPR7FD	635
CCC0633_01.032	BLT restart file for sample problem TESTKD	0
CCC0633_01.033	Leach release mass rate, problem INPR7A	375
CCC0633_01.034	Leach mass release, problem INPR7A	375
CCC0633_01.035	Leach release rate, problem INPR7FD	375
CCC0633_01.036	Leach mass release, problem INPR7FD	375
CCC0633_01.037	Concentration traces from input file INPR7FD	375
CCC0633_01.038	Source code of program BLTPLOT	3754
CCC0633_01.039	Parameters used in the INCLUDE statements	34
CCC0633_01.040	Author's executable file of program BLTPLOT	0
CCC0633_01.041	Configuration file for BLTPLOT	32
CCC0633_01.042	Plot symbol set file	0
CCC0633_01.043	BLT sample input file	67
CCC0633_01.044	Velocity file created by FEMWATER	596
CCC0633_01.045	Leach release rate file, created by BLT	1000
CCC0633_01.046	Leach mass release file, created by BLT	1000
CCC0633_01.047	Concentration trace file created by BLT	27
CCC0633_01.048	Flux trace file created by BLT	25
CCC0633_01.049	Main output file created by BLT	2144
CCC0633_01.050	User's Guide for BLTPLOT (WordPerfect doc)	0
CCC0633_01.051	List of subroutines in BLTPLOT	59
CCC0633_01.052	NEA-DB executable of program BLT	0
CCC0633_01.053	NEA-DB executable of program GRAFBLT	0
CCC0633_01.054	NEA-DB executable of program FEMWATER	0
CCC0633_01.055	NEA-DB executable of program REDIMGRD	0
CCC0633_01.056	Auxiliary file for BLT, generated by FEMWATE	293
CCC0633_01.057	Auxiliary file for BLT, generated by FEMWATE	596
CCC0633_01.058	Output file for BLTTest, generated at NEA-DB	2140
CCC0633_01.059	Output file for INPR7A , generated at NEA-DB	2300
CCC0633_01.060	Output file for INPR7FD, generated at NEA-DB	3700
CCC0633_01.061	Output file for TESTKD , generated at NEA-DB	2522
CCC0633_01.062	Rstart file for BLTTEST, generated at NEA-DB	1853
CCC0633_01.063	Rstart file for INPR7A , generated at NEA-DB	635
CCC0633_01.064	Rstart file for INPR7FD, generated at NEA-DB	635
CCC0633_01.065	Rstart file for TESTKD , generated at NEA-DB	1090
CCC0633_01.066	Leach release rate for INPR7A (NEA-DB gen.)	375
CCC0633_01.067	Leach mass release for INPR7A (NEA-DB gen.)	375
CCC0633_01.068	Leach release rate for INPR7FD(NEA-DB gen.)	375
CCC0633_01.069	Leach mass release for INPR7FD(NEA-DB gen.)	375
CCC0633_01.070	Concentration traces from INPR7A (NEA-DB)	81
CCC0633_01.071	Concentration traces from INPR7FD(NEA-DB)	81
CCC0633_01.072	Sample output file produced by FEMWATER	1730
CCC0633_01.073	Aux. sample output file produced by FEMWATER	1196
CCC0633_01.074	DOS file-names	73