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Theory & User Manuals

Until the MCNP6.3 release is completed and the total software product (code + documentation) is available to users, the theory & user manual that corresponds to that release is available here as both a preview of new capabilities and as a reference for features that overlap with MCNP6.2.

Note that effective November 26, 2001, the Office of Export Control Policy and Cooperation has required that certain versions of older MCNP User Manuals be removed from all publicly accessible websites. Further review may allow us to repost the manual someday.

J. A. Kulesza, T. R. Adams, J. C. Armstrong, S. R. Bolding, F. B. Brown, J. S. Bull, T. P. Burke, A. R. Clark, R. A. Forster III, J. F. Giron, T. S. Grieve, C. J. Josey, R. L. Martz, G. W. McKinney, E. J. Pearson, M. E. Rising, C. J. Solomon Jr., S. Swaminarayan, T. J. Trahan, S. C. Wilson, A. J. Zukaitis. MCNP® Code Version 6.3.0 Theory & User Manual. Los Alamos National Laboratory Tech. Rep. LA-UR-22-30006, Rev. 1. Los Alamos, NM, USA. September 2022.
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C. J. Werner, J. C. Armstrong, F. B. Brown, J. S. Bull, L. Casswell, L. J. Cox, D. A. Dixon, R. A. Forster III, J. T. Goorley, H. G. Hughes III, J. A. Favorite, R. L. Martz, S. G. Mashnik, M. E. Rising, C. J. Solomon Jr., A. Sood, J. E. Sweezy, A. J. Zukaitis, C. A. Anderson, J. S. Elson, J. W. Durkee Jr., R. C. Johns, G. W. McKinney, G. E. McMath, J. S. Hendricks, D. B. Pelowitz, R. E. Prael, T. E. Booth, M. R. James, M. L. Fensin, T. A. Wilcox, B. C. Kiedrowski. MCNP User's Manual Code Version 6.2. Los Alamos National Laboratory Tech. Rep. LA-UR-17-29981. Los Alamos, NM, USA. 2017.
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M. R. James, D. B. Pelowitz, A. J. Fallgren, G. E. McMath, T. E. Booth, F. B. Brown, J. S. Bull, L. J. Cox, J. S. Elson, J. W. Durkee Jr., M. L. Fensin, R. A. Forster III, J. T. Goorley, J. S. Hendricks, H. G. Hughes III, R. C. Johns, B. C. Kiedrowski, G. W. McKinney, R. L. Martz, S. G. Mashnik, R. E. Prael, J. E. Sweezy, T. A. Wilcox, A. J. Zukaitis. MCNP6 User's Manual Code Version 6.1.1 Beta. Los Alamos National Laboratory Tech. Rep. LA-CP-14-00745. Los Alamos, NM, USA. June 2014. This document is provided in the MCNP6 release package available from RSICC and is not accessible from the MCNP website.
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D. B. Pelowitz, J. T. Goorley, M. R. James, T. E. Booth, F. B. Brown, J. S. Bull, L. J. Cox, J. W. Durkee Jr., J. S. Elson, M. L. Fensin, R. A. Forster III, J. S. Hendricks, H. G. Hughes III, R. C. Johns, B. C. Kiedrowski, R. L. Martz, S. G. Mashnik, G. W. McKinney, R. E. Prael, J. E. Sweezy, L. S. Waters, T. A. Wilcox, A. J. Zukaitis. MCNP6 User's Manual. Los Alamos National Laboratory Tech. Rep. LA-CP-13-00634. Los Alamos, NM, USA. May 2013. This document is provided in the MCNP6 release package available from RSICC and is not accessible from the MCNP website. Code Version 6.1.
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D. B. Pelowitz, J. W. Durkee Jr., J. S. Elson, M. L. Fensin, J. S. Hendricks, M. R. James, R. C. Johns, G. W. McKinney, S. G. Mashnik, L. S. Waters, T. A. Wilcox, J. M. Verbeke. MCNPX 2.7.0 Extensions. Los Alamos National Laboratory Tech. Rep. LA-UR-11-02295. Los Alamos, NM, USA. 2011.
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D. B. Pelowitz, J. W. Durkee Jr., J. S. Elson, M. L. Fensin, M. R. James, R. C. Johns, G. W. McKinney, S. G. Mashnik, L. S. Waters, J. S. Hendricks, J. M. Verbeke. MCNPX 2.7.D Extensions. Los Alamos National Laboratory Tech. Rep. LA-UR-10-07031. Los Alamos, NM, USA. 2010.
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J. S. Hendricks, G. W. McKinney, M. L. Fensin, M. R. James, R. C. Johns, J. W. Durkee Jr., J. P. Finch, D. B. Pelowitz, L. S. Waters, M. W. Johnson, F. X. Gallmeier. MCNPX 2.6.0 Extensions. Los Alamos National Laboratory Tech. Rep. LA-UR-08-02216. Los Alamos, NM, USA. 2008.
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J. E. Sweezy, T. E. Booth, F. B. Brown, J. S. Bull, R. A. Forster III, J. T. Goorley, H. G. Hughes III, R. L. Martz, R. E. Prael, A. Sood, A. J. Zukaitis, R. C. Little, H. R. Trellue, M. C. White, M. B. Lee, S. M. Girard. MCNP - A General Monte Carlo N-Particle Transport Code, Version 5 - Volume 1: Overview and Theory. Los Alamos National Laboratory Tech. Rep. LA-UR-03-1987 (Revised 2/1/2008). Los Alamos, NM, USA. April 2003.
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J. E. Sweezy, T. E. Booth, F. B. Brown, J. S. Bull, R. A. Forster III, J. T. Goorley, H. G. Hughes III, R. L. Martz, R. E. Prael, A. Sood, A. J. Zukaitis, R. C. Little, H. R. Trellue, M. C. White, M. B. Lee, S. M. Girard. MCNP - A General Monte Carlo N-Particle Transport Code, Version 5 - Volume 3: Developer's Guide. Los Alamos National Laboratory Tech. Rep. LA-CP-03-0284 (Revised 2/1/2008). Los Alamos, NM, USA. April 2003. This document is provided in the MCNP6 release package available from RSICC and is not accessible from the MCNP website.
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J. E. Sweezy, T. E. Booth, F. B. Brown, J. S. Bull, R. A. Forster III, J. T. Goorley, H. G. Hughes III, R. L. Martz, R. E. Prael, A. Sood, A. J. Zukaitis, R. C. Little, H. R. Trellue, M. C. White, M. B. Lee, S. M. Girard. MCNP - A General Monte Carlo N-Particle Transport Code, Version 5 - Volume 2: User's Guide. Los Alamos National Laboratory Tech. Rep. LA-CP-03-0245 (Revised 2/1/2008). Los Alamos, NM, USA. April 2003. This document is provided in the MCNP6 release package available from RSICC and is not accessible from the MCNP website.
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L. S. Waters. MCNPX User's Manual. Los Alamos National Laboratory Tech. Rep. LA-UR-02-2607. Los Alamos, NM, USA. 2002. Code Version 2.3.0.
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J. F. Briesmeister, et al. MCNP—A General Monte Carlo N-Particle Transport Code. Los Alamos National Laboratory Tech. Rep. LA-13709-M. Los Alamos, NM, USA. December 2000. Code Version 4C.
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J. F. Briesmeister, T. E. Booth, D. G. Collins, J. J. Devaney, G. P. Estes, H. M. Fisher, R. A. Forster III, T. N. K. Godfrey, J. S. Hendricks, H. G. Hughes III, R. C. Little, R. E. Prael, R. G. Schrandt, R. E. Seamon, E. C. Snow, W. L. Thompson, W. T. Urban, J. T. West. MCNP—A General Monte Carlo Code for Neutron and Photon Transport. Los Alamos National Laboratory Tech. Rep. LA-7396-M, Rev. 2. Los Alamos, NM, USA. September 1986. Code Version 3A.
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LASL Group TD-6. MCNP—A General Monte Carlo Code for Neutron and Photon Transport. Los Alamos National Laboratory Tech. Rep. LA-7396-M, Rev. 1. Los Alamos, NM, USA. November 1979. Code Version 2.
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LASL Group TD-6. MCNP—A General Monte Carlo Code for Neutron and Photon Transport. Los Alamos National Laboratory Tech. Rep. LA-7396-M. Los Alamos, NM, USA. July 1978. Code Version 1.
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