NE Seminars

Thursday, February 22, 2008 at 4:00 p.m

• Avneet Sood, Ph.D.
  Los Alamos National Laboratory
  X-3, Eolus/MCNP Monte Carlo Team
  
  
• "Analytic Verification of Non-Boltzmann Problems"
  
  
• Abstract
  
  One method of code verification includes comparison of calculated results with analytic solutions.  For radiation transport, exact solutions to the particle transport equations in three-dimensional space as a function of energy, angle, and time are complex and often impossible. One technique to provide analytic solutions is to simplify or eliminate terms in the transport equation (eg. one dimension, single energy group, isotropic scattering, ...).  An alternative approach to generating analytic solutions is to simplify the nuclear data, leaving the mathematical equations and computer code unaltered.  This approach allows code verification independent of solution technique (eg. deterministic, Monte Carlo).  In this work, we improve on an existing approach that simplifies the physical data to analytically verify the non-Boltzmann pulse-height tally in the Monte Carlo code, MCNP 5.  This is particularly important with the upcoming release of MCNP5.1.50 which, for the first time, allows all of MCNP's variance reduction techniques to be used with pulse-height tallies.
  
  

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