MCNP 6.2 STARTR Model

The MCNP model for STARTR was made using MCNP version 6.2. The input is commented and describes the geometry, materials, and movement of the control drums for the model. The input is configured for k-eigenvalue calculations.

Figure 1: STARTR MCNP radial reactor geometry with control drums at cold critical position

Adding Tallies

There are no tallies used in this base model. Tallies may be added by the user to investigate specific parameters of interest in the model (e.g. flux, flux spectrum, fission densities, reaction rates, etc.) See the MCNP 6.2 User's Manual (Werner et al., 2017) for more information.

Customizing Runtime Settings

The runtime settings are defined in the execution of MCNP in serial or in parallel mode. The installation of MCNP must support parallel calculations to run in parallel mode.

Running the Model

Running MCNP is executed from the shell. The execution commands for serial or parallel are below.

Listing 1: MCNP serial execution command

mcnp6 i=STARTR_MCNP.input.txt

Listing 2: MCNP parallel execution command

mpirun mcnp6 i=STARTR_MCNP.input.txt n=48

will run the code in parallel with 48 cores. Customize this to the number of cores you wish to use for MCNP.

References

Christopher John Werner, Jerawan Chudoung Armstrong, Forrest Brooks Brown, Jeffrey S. Bull, Laura Casswell, Lawrence James Cox, David A. Dixon, Robert Arthur Forster, III, John Timothy Goorley, Henry Grady Hughes, III, Jeffrey A. Favorite, Roger Lee Martz, Stepan Georgievich Mashnik, Michael Evan Rising, Clell Jeffrey Solomon, Jr., Avneet Sood, Jeremy Ed Sweezy, Anthony J. Zukaitis, Casey Alan Anderson, Jay Samuel Elson, Joe W. Durkee, Jr., Russell Craig Johns, Gregg Walter McKinney, Garrett Earl McMath, John S. Hendricks, Denise B. Pelowitz, Richard Edward Prael, Thomas Edward Booth, Michael R. James, Michael Lorne Fensin, Trevor A. Wilcox, and Brian Christopher Kiedrowski. MCNP User's Manual Code Version 6.2. Technical Report LA-UR-17-29981, Los Alamos National Laboratory, Los Alamos, NM, USA, October 2017. URL: http://permalink.lanl.gov/object/tr?what=info:lanl-repo/lareport/LA-UR-17-29981.

@techreport{MCNP62UserManual,
    author = "Werner, Christopher John and Armstrong, Jerawan Chudoung and Brown, Forrest Brooks and Bull, Jeffrey S. and Casswell, Laura and Cox, Lawrence James and Dixon, David A. and Forster, III, Robert Arthur and Goorley, John Timothy and Hughes, III, Henry Grady and Favorite, Jeffrey A. and Martz, Roger Lee and Mashnik, Stepan Georgievich and Rising, Michael Evan and Solomon, Jr., Clell Jeffrey and Sood, Avneet and Sweezy, Jeremy Ed and Zukaitis, Anthony J. and Anderson, Casey Alan and Elson, Jay Samuel and Durkee, Jr., Joe W. and Johns, Russell Craig and McKinney, Gregg Walter and McMath, Garrett Earl and Hendricks, John S. and Pelowitz, Denise B. and Prael, Richard Edward and Booth, Thomas Edward and James, Michael R. and Fensin, Michael Lorne and Wilcox, Trevor A. and Kiedrowski, Brian Christopher",
    address = "Los Alamos, NM, USA",
    institution = "Los Alamos National Laboratory",
    month = "October",
    number = "LA-UR-17-29981",
    title = "{MCNP User's Manual Code Version 6.2}",
    url = "http://permalink.lanl.gov/object/tr?what=info:lanl-repo/lareport/LA-UR-17-29981",
    year = "2017"
}

Adding Tallies
Customizing Runtime Settings
Running the Model
References