Title :
Benchmark neutron porosity log calculations: a comparison of MCNP and the specific purpose code McDNL
Author :
Little, R.C. ; Mickael, M. ; Verghese, K. ; Gardner, R.P.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
fDate :
2/1/1989 12:00:00 AM
Abstract :
Calculations have been made for a benchmark neutron porosity log problem with the general-purpose Monte Carlo code MCNP (Monte Carlo neutron photon) and the special-purpose Monte Carlo McDNL. For accuracy and timing comparison purposes the CRAY XMP and MicroVax II computers have been used with these codes. The CRAY has been used for an analog version of the MCNP code while the MicroVax II has been used for the optimized variance reduction versions of both codes. Results indicate that the two codes give the same results within calculated standard deviations. Comparisons are given and discussed for accuracy (precision) and computation times for the two codes
Keywords :
Monte Carlo methods; geophysical prospecting; geophysical techniques; geophysics computing; CRAY XMP; MCNP; McDNL; MicroVax II; Monte Carlo code; accuracy; analog version; benchmark neutron porosity log problem; computation times; nuclear well logging; optimized variance reduction versions; Accuracy; Code standards; Laboratories; Monte Carlo methods; Neutrons; Postal services; Radioactive materials; Testing; Timing; Well logging;
Journal_Title :
Nuclear Science, IEEE Transactions on
