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Title: Using MCNP for Nonproliferation Applications

Authors:
 [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1329655
Report Number(s):
LA-UR-16-27559
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: Advances in Nuclear Nonproliferation Technology and Policy Conference (ANTPC) ; 2016-09-25 - 2016-09-25 ; Santa Fe, New Mexico, United States
Country of Publication:
United States
Language:
English
Subject:
Introduction, MCNP

Citation Formats

McMath, Garrett Earl. Using MCNP for Nonproliferation Applications. United States: N. p., 2016. Web.
McMath, Garrett Earl. Using MCNP for Nonproliferation Applications. United States.
McMath, Garrett Earl. 2016. "Using MCNP for Nonproliferation Applications". United States. doi:. https://www.osti.gov/servlets/purl/1329655.
@article{osti_1329655,
title = {Using MCNP for Nonproliferation Applications},
author = {McMath, Garrett Earl},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 9
}

Conference:
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  • A comparison is made of results obtained from neutron transmissions analysis of RPV performed by MCNP with ENDF/B-VI and JENDL-3.1 iron data. At first, a one-dimensional discrete ordinates transport calculation using VITAMIN-C fine-group library based on ENDF/B-IV was performed for a cylindrical model of a PWR to generate the source spectrum at the front of the RPV. And then, the transmission of neutrons through RPV was calculated by MCNP with the moderated fission spectrum incident on the vessel face. For these ENDF/B-IV, -VI and JENDL-3.1 iron data were processed into continuous energy point data form by NJOY91.91. The fast neutronmore » fluxes and dosimeter reaction rates through RPV using each iron data were intercompared.« less
  • Recent world events have emphasized the need for advanced in-field sensor system to support nonproliferation efforts. These systems will combine laboratory instrument performance with the portability and robustness required for field applications. Argonne National Laboratory is currently developing one such system based on laser desorption photo-ionization time-of-flight (TOF) mass spectrometry. This highly miniaturized system incorporates all components (vacuum, detector, electronics, computer, and laser) in a package measuring 9x11x4 in. and weighing 15-18 lb. The physical principles, system design, and operating conditions that govern the resultant resolution and sensitivity will be discussed. Results relevant to nonproliferation activities obtained from both amore » miniaturized laboratory TOF-reflectron and a linear TOF-MS prototype will be presented.« less
  • In the nuclear safeguards and arms control areas, well-developed methodologies exist for determining the properties of nuclear materials via measurements of the gamma rays and neutrons emitted from these materials, or in the arms control area, by the use of radiography. In certain favorable instances, it may by feasible to perform comparable measurements with the use of a ubiquitous, naturally-occurring radiation--cosmic ray mu mesons (muons). At the earth`s surface these charged particles have a broad energy distribution peaking at about 500 MeV with a flux of approximately 10{sup {minus}2}/cm{sup 2}-sec-steradian. In traversing matter, muons lose energy at a rate ofmore » approximately 2 MeV/gram almost independent of atomic number. Muons can readily be detected by either plastic scintillators or wire planes. While the flux is small, a scintillator of one meter area, for example, will register about 20,000 events/min. these particles should have utility in the detection and imaging of objects with sectional densities of a few hundred grams/cm{sup 2}. The degree of intrusiveness of the imaging can be controlled through the detector configuration. Some possible applications include: (1) mass measurements on large UF{sub 6} cylinders, (2) determination of the size of treaty-limited objects, e.g., missiles, in rail cars or other containment; (3) verification of single or multiple warheads or components; (4) the detection of concealed, underground cavities. Examples will be presented.« less
  • The pulsed Photonuclear Assessment (PPA) technique, which has demonstrated the ability to detect shielded nuclear material, is based on utilizing delayed neutrons and photons between accelerator pulses. While most active interrogation systems have focused on delayed neutron and gamma-ray signatures, the current requirements of various agencies necessitate bringing faster detection and acquisition capabilities to field inspection applications. This push for decreased interrogation times, increased sensitivity and mitigation of false positives requires that detection systems take advantage of all available information. Collaborative research between Idaho National Lab (INL), Idaho State University’s Idaho Accelerator Center (IAC), Los Alamos National Laboratory (LANL), andmore » Oak Ridge National Laboratory (ORNL), has focused on exploiting actively-induced, prompt radiation signatures from nuclear material within a pulsed photonuclear environment. To date, these prompt emissions have not been effectively exploited due to difficulties in detection and signal processing inherent in the prompt regime as well as an overall poor understanding of the magnitude and yields of these emissions. Exploitation of prompt radiation (defined as during an accelerator pulse/(photo) fission event and/or immediately after (< l ms)) has the potential to dramatically reduce interrogation times since the yields are more than two orders of magnitude greater than delayed emissions. Recent preliminary experiments conducted at the IAC suggest that it is indeed possible to extract prompt neutron information within a pulsed photon environment. Successful exploitation of prompt emissions is critical for the development of an improved robust, high-throughput, low target dose inspection system for detection of shielded nuclear materials.« less
  • Abstract not provided.