New MCNPX developments

Conference · Tue Jan 01 00:00:00 EST 2002

OSTI ID:976069

Hendricks, J S ^[1]; McKinney, G W ^[2]; Waters, L S ^[3]; Hughes, H G ^[4]; Snow, E C ^[5]

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1. John S.
2. Gregg W.
3. Laurie S.
4. Henry Grady
5. Edward Clark

The Los Alamos National Laboratory Monte Carlo N-Particle extended (MCNPX) radiation transport code has been upgraded significantly to Version MCNPX2.4.0. It is now based on the latest MCNP4C3 and MCNPX2.3.0 releases to the Radiation Safety Information Computational Center (RSICC). In addition to all of the advances from earlier versions of MCNP and MCNPX, important new capabilities have been developed. The Monte Carlo method was developed at Los Alamos National Laboratory during the Manhattan Project in the early 1940s. MCNP and MCNPX are heirs to those early efforts. Over 400 person-years have been invested in the research, development, programming, documentation, and databases for these codes. MCNP is a general-purpose neutron (0-MeV to 20-MeV), photon (1-keV to 1-GeV), and electron (1-keV to 1-GeV) transport code for calculating *MCNPX, MCNP, LAHET, and LCS are trademarks of the Regents of the University of California, Los Alamos National Laboratory. the time-dependent, continuous-energy transport of these particles in three-dimensional geometries. MCNP is perhaps the most widely used and well-known physics simulation code in the world today. MCNPX extends MCNP to track nearly all particles at all energies. MCNPX combined MCNP and the LAHET Code System (LCS). LCS is based on the Oak Ridge High Energy Transport Code. LCS uses models for particles in physics regimes where there are no tabulated data, including the Bertini and ISABEL models. MCNPX has additional models to LCS, such as the CEM model. MCNPX2.3.0 was released to RSICC in December 2001 and is based on MCNP4B. The principal features of MCNPX2.3.0 are (1) Physics for 34 particle types; (2) High-energy physics above the giga-electron volt range; (3) Neutron, proton, and photonuclear 150-MeV libraries: (4) Photonuclear physics; (5) Mesh tallies; (6) Radiography tallies; (7) Secondary particle production biasing; (8) VAVILOV energy straggling for charged particles; and (9) Automatic configuration for compilation. The focus of this work is MCNPX2.4.0, which is due for imminent release. MCNPX2.4.0 merges MCNPX2.3.0 with MCNP4C3 and adds important new features.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• OSTI ID: 976069
• Report Number(s): LA-UR-02-0642; LA-UR-02-642; TRN: US201009%%522
• Resource Relation: Conference: "Submitted to: 12th Biennial RPSD Topical Meeting, April 2002, Santa Fe, NM"
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CHARGED PARTICLES
CONFIGURATION
DOCUMENTATION
ELECTRONS
MANHATTAN PROJECT
MONTE CARLO METHOD
NEUTRONS
PARTICLE PRODUCTION
PHOTONS
PHYSICS
PROGRAMMING
RADIATION PROTECTION
RADIATION TRANSPORT
SIMULATION
TRANSPORT