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CCC-0638 TART2012.

TART2012, 3D Coupled Neutron-Photon Combinatorial Geometry, Time Dependent, Monte Carlo Transport Code

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1. NAME OR DESIGNATION OF PROGRAM:  TART2012. This package contains TART2005.
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2. COMPUTERS
To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.
Program name Package id Status Status date
TART2012 CCC-0638/10 Arrived 11-JUL-2013

Machines used:

Package ID Orig. computer Test computer
CCC-0638/10 MacOS,Linux-based PC,PC Windows
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3. DESCRIPTION OF PROGRAM OR FUNCTION

TART2012 is a coupled neutron-photon Monte Carlo transport code designed to use three-dimensional (3-D) combinatorial geometry. Neutron and/or photon sources as well as neutron induced photon production can be tracked. It is a complete system to assist you with input preparation, running Monte Carlo calculations, and analysis of output results. TART2012 is also incredibly FAST; if you have used similar codes, you will be amazed at how fast this code is compared to other similar codes. Use of the entire system can save you a great deal of time and energy.

TART2012 extends the general utility of the code to even more areas of application than available in previous releases by concentrating on improving the physics, particularly with regard to improved treatment of neutron fission, resonance self-shielding, molecular binding, and extending input options used by the code.  Several utilities are included for creating input files and displaying TART results and data.

TART2012 uses the latest ENDF/B-VI, Release 8, data. New for TART2012 is the use of continuous energy neutron cross sections, in addition to its traditional multigroup cross sections. For neutron interaction, the data are derived using ENDF-ENDL2005 and include both continuous energy cross sections and 700 group neutron data derived using a combination of ENDF/B-VI, Release 8, and ENDL data. The 700 group structure extends from 10-5 eV up to 1 GeV. Presently nuclear data are only available up to 20 MeV, so that only 616 of the groups are currently used. For photon interaction, 701 point photon data were derived using the Livermore EPDL97 file. The new 701 point structure extends from 100 eV up to 1 GeV, and is currently used over this entire energy range.

TART2012 completely supersedes all older versions of TART, and it is strongly recommended that one use only the most recent version of TART2012 and its data files. Check author's homepage for related information: http://home.comcast.net/~redcullen1/index.htm .

Recent Updates:

2006
- Corrected S(a,b) coherent scatter to, scatter in the Lab (not CM) system. Coherent scatter with no change speed.
- Updated neutrons/fission sampling to include correction to conserve < nu >.
- Corrected criticality flux by material normalize Now EXACTLY = Analog fission neutrons produce so they sum to total analog flux.
- Missive change to correct reactall and reacted. Now only analog - output also by ZA/C.
- Added C=47-54 charged particle reactions (currently only C=48 in ZA=30000).
- Changed weights to relative - insure each source particle (neutron/photon) has a total weight = 1
- Removed bias and biasg - only way to insure the total weight = 1

2007
- Corrected high energy exponential spectra fit
- Added stack to build for photon re-entry problem
- High energy fission fit now E*Exp[-a*E]
- Low energy fission fit sqrt( E) to higher energy

2008
- Spectra sqrt( E) below 10 keV.
- (n,n') neat threshold, low energy extension.
- Updated NEWCROSS for ENDF/B-VII U238.
- Updated for over 1,000,000 zones; extended output format.
- Corrected cneutal and cphotal (was ignored)
- Sentl 60 Intermediate Resonances now standard

2012
- Complete rewrite to incorporate all user feedback.
- Made 64 bit compiler compatible.
- Eliminated re-entrant coding.
- Neutrons and photons sources now treated same.
- sentl 1 = 3 (neutron AND photon sources) is no longer allowed
- Because of the above, sentl 18 photon/neutron source ratio no longer has any meaning.
- Data files updated based on ENDF/B-VII.1 data.
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4. METHOD OF SOLUTION

Monte Carlo radiation transport of neutrons and/or photons.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:  None noted.
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6. TYPICAL RUNNING TIME

TART is very fast. The TART2012 example of 68 problems required a total of 19 seconds (less than one second per problem) on an AMD 3500+ running Windows.  For a complete list of running times on a variety of computers, see the TART documentation as well as the website,
http://home.comcast.net/~redcullen1/speed.htm
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7. UNUSUAL FEATURES
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8. RELATED AND AUXILIARY PROGRAMS

Auxiliary Codes:

TARTCHEK:   Check TART input and Display TART Results.
TARTAID:    Create TART input.
EPICSHOW:   Display Atomic and Nuclear data used by TART.
PLOTTAB:    General Plotting Code to Display TART output.
EDITOR:     Text editor for use with TART.
UTILITY:    A collection of useful codes.

Data Libraries:

TARTND:     Neutron interaction data
TARTPPD:    Neutron induced photon production data
GAMDAT:     Photon interaction data
NEWCROSS:   Neutron self-shielding, multi-band parameter data
NEUTRON:    Neutron continuous energy cross sections
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9. STATUS
Package ID Status date Status
CCC-0638/10 11-JUL-2013 Masterfiled Arrived
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10. REFERENCES

references for data in this package are available on the author's website:
- D.E. Cullen:
A Temperature Dependent ENDF/B-VI, Release 8 Cross Section Library, UCRL-ID-127776, Rev. 2 (May 22, 2003). This document is distributed with the DLC-218/POINT2003 package.
- D.E.Cullen:
POINT 2004: A Temperature Dependent ENDF/B-VI, Release 8 Cross Section Library, Lawrence Livermore National Laboratory, UCRL-TR-202284, April 2004.
CCC-0638/10, included references:
- D. E. Cullen:
TART2012 - An Overview of A Coupled Neutron-Photon 3-D, Combinatorial Geometry,
Time Dependent Monte Carlo Transport Code, LLNL-TR-577352 (July .22, 2012).
- D. E. Cullen:
TART2005 - A Coupled Neutron-Photon 3-D, Combinatorial Geometry, Time Dependent
Monte Carlo Transport Code, UCRL-SM-218009 (Nov.22, 2005).
- D.E. Cullen, A.L. Edwards and E.F. Plechaty:
TART95: A Coupled Neutron-Photon Monte Carlo Transport Code, Lawrence Livermore
National Laboratory, UCRL-MA-121319 (July 4, 1995)
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11. MACHINE REQUIREMENTS

TART2012 runs on IBM-PC (Windows and Linux), Cray, Unix workstations (Sun, IBM RS/6000, DEC-Alpha, etc.), and Power MAC. It is written in such standard Fortran that it should be relatively easy to implement and use on any computer.
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12. PROGRAMMING LANGUAGE(S) USED
Package ID Computer language
CCC-0638/10 FORTRAN
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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED

TART2012 is designed to run on any computer. It is presently implemented various Unix workstations, IBM-PC (Windows and Linux), Cray, and Power MAC.  For use on IBM-PC and Power MAC, the entire system is distributed in executable form, so that no compiler or loader is required on these systems.  Since executables are distributed for these computers, Fortran source code is not included.  The ABSOFT Fortran compiler was used to create included executables for Windows, which run under 32-bit systems. The Intel 9.1 compiler was used to create executables on a 32-bit Red Hat Linux system; these executables were also tested on 64-bit Opterons running RHEL 4. On all other computers, a Fortran compiler which supports Cray-like pointers is required. In addition, on Unix workstations the graphics portion of the system requires a C compiler.
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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 Shielding Information Computational Center
                Oak Ridge National Laboratory
                Oak Ridge, Tennessee, USA
Developed by:   Dermott E. Cullen
                Lawrence Livermore National Laboratory, Livermore, CA, USA
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16. MATERIAL AVAILABLE
CCC-0638/10
source codes
precompiled executables for MAC and IBM PC (Windows and Linux)
data files and test cases for use on a variety of computers
Installation and verification instructions for each type of computer
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17. CATEGORIES
  • C. Static Design Studies
  • J. Gamma Heating and Shield Design

Keywords: Monte Carlo method, coupled neutron gamma cross sections, reactivity, shielding.