LA-UR- Approved for public release; distribution is unlimited. NATIONAL LABORATORY --- EST.1943 --- Title: Experimental Benchmark of MCNPX Calculations Against Self-Interrogation l\leutron Resonance Densitometry (SINRD) Fresh Fuel Measurements Authar(s): Adrienne M. LaFleur William S. Charlton Howard O. Menlove Martyn T. Swinhoe Sang Y. Lee Steve J. Tobin Intended for: INMM 51 st Annual Meeting Los Alamos National Laboratory. an affirmative action/equal opportunity employer, is operated by the Los Alamos National Security, LLC for the National Nuclear Security Administration of the U.S. Department of Energy under contract DE-AC52-06NA25396. By acceptance of this article, the publisher recognizes that the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, or to allow others to do so, for U.S. Government purposes. Los Alamos National Laboratory requests that the publisher identify this article as work performed under the auspices of the U.S. Department of Energy. Los Alamos National Laboratory strongly supports academic freedom and a researcher's right to publish; as an institution, however, the Laboratory does not endorse the viewpoint of a publication or guarantee its technical correctness. Form 836 (7/06)