radsafer (version 2.4.0)

mcnp_est_nps: Copy and paste MCNP tally fluctuation charts

Description

Provides quick estimate of number of particles histories, (nps) to obtain target MCNP 'error'. Paste may include up to three tallies side by side in the default MCNP order. For example, the headers of a three tally report includes column names: nps, mean, error, vov, slope, fom, mean, error, vov, slope, fom, mean, error, vov, slope, fom. The structure of the tfc has been the same for versions 4 through 6, including MCNPX.

Usage

mcnp_est_nps(err_target)

Value

estimate of number of particle histories needed

Arguments

err_target

The target Monte Carlo uncertainty

See Also

Other mcnp tools: mcnp_cone_angle(), mcnp_matrix_rotations(), mcnp_mesh_bins(), mcnp_plot_out_spec(), mcnp_scan2plot(), mcnp_scan_save(), mcnp_sdef_erg_hist(), mcnp_sdef_erg_line()

Examples

# Since this function requires the user
# to copy and paste input, this example
# is set up to provide data for this purpose.
# To run the example, copy and paste the following
# into an input file and delete the hash tags to run.
# Enter '1' for number of tallies.
# mcnp_est_nps(0.01)
#      32768000   4.5039E+00 0.2263 0.0969  0.0 5.0E-02
#      65536000   3.9877E+00 0.1561 0.0553  0.0 5.1E-02
#      98304000   3.4661E+00 0.1329 0.0413  0.0 4.7E-02
#     131072000   3.5087E+00 0.1132 0.0305  0.0 5.0E-02
#     163840000   3.5568E+00 0.0995 0.0228  0.0 5.2E-02
#     196608000   3.8508E+00 0.0875 0.0164  0.0 5.5E-02
#     229376000   3.8564E+00 0.0810 0.0135  0.0 5.5E-02
#     262144000   3.9299E+00 0.0760 0.0118  0.0 5.5E-02
#     294912000   4.0549E+00 0.0716 0.0100  0.0 5.6E-02
#     327680000   4.0665E+00 0.0686 0.0090  0.0 5.4E-02
#     360448000   4.1841E+00 0.0641 0.0079  0.0 5.7E-02