last modified: 20-APR-1994 | catalog | categories | new | search |

CCC-0604 CHAINS-PC.

CHAINS-PC, Decay Chain Atomic Densities

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1. NAME OR DESIGNATION OF PROGRAM:  CHAINS-PC (Code System to Compute
Atom Density of Members of a Single Decay Chain).
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2. COMPUTERS
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Program name Package id Status Status date
CHAINS-PC CCC-0604/01 Tested 20-APR-1994

Machines used:

Package ID Orig. computer Test computer
CCC-0604/01 IBM PC PC-80486
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3. DESCRIPTION OF PROGRAM OR FUNCTION

CHAINS computes the atom density of members of a single radioactive decay chain. The linearity of the Bateman equations allows tracing of interconnecting chains by manually accumulating results from separate calculations of single chains. Re-entrant loops can be treated as extensions of a single chain. Losses from the chain are also tallied.
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4. METHOD OF SOLUTION

The Bateman equations are solved analytically using double-precision arithmetic. Poles are avoided by small alterations of the loss terms. Multigroup fluxes, cross sections, and self-shielding factors entered as input are used to compute the  effective specific reaction rates. The atom densities are computed at any specified times.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of 100 energy groups, 100 time values, 50 members in a chain.
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6. TYPICAL RUNNING TIME

RSIC executed the sample problem in 2 seconds on a PC 486, running 33 Megahertz.
CCC-0604/01
The sample problem was run at the NEA-DB on a 66-MHz PC/80486 in about 0.3 seconds of elapsed 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-0604/01 20-APR-1994 Tested at NEADB
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10. REFERENCES:
CCC-0604/01, included references:
- W.B. Henderson:
  Program CHAINS
  NMP-856 (March 1967).
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11. MACHINE REQUIREMENTS

The IBM PC version requires 76 Kbytes of memory and an 80x87 math coprocessor. RSIC executed the sample problem in 2 seconds on an PC 486, running 33 megahertz.
CCC-0604/01
The program was compiled and executed by NEA-DB on a DELL 486L/66Mhz with processor 80486 and 16 MB of RAM. The file size of the executable version created, including the stub loader that binds the 386/DOS extender into the executable is 250 KBytes.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
CCC-0604/01 FORTRAN-77
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

The IBM PC version requires the Lahey F77L or a suitable alternative compiler capable of accepting NAMELIST input.
CCC-0604/01
The program CHAINS was implemented under MS-DOS 6.0. The source code was compiled with the Lahey compiler F77L-EM/32, version 5.11 and linked with the linker 386LINK.
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:
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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:   General Electric Corp., Cincinnati, Ohio
                under sponsorship of DOE-NE and the
                National Energy Software Center, Argonne, Illinois
                through the DOE ESTSC, Oak Ridge, Tennessee, USA
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16. MATERIAL AVAILABLE
CCC-0604/01
File name File description Records
CCC0604_01.001 CHAINS-PC Information file 98
CCC0604_01.002 CHAINS-PC source code file 301
CCC0604_01.003 Batch file to create the CHAINS executable 12
CCC0604_01.004 CHAINS-PC executable 0
CCC0604_01.005 CHAINS-PC sample input data 49
CCC0604_01.006 CHAINS-PC sample output data 685
CCC0604_01.007 DOS file-names 6
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17. CATEGORIES
  • D. Depletion, Fuel Management, Cost Analysis, and Power Plant Economics

Keywords: inventories, isotopes, radioactive decay.