Pulsed Photonuclear Assessment (PPA) Technology Enhancement Study

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The Idaho National Laboratory (INL) along with the Los Alamos National Laboratory (LANL) and Idaho State University’s Idaho Accelerator Center (IAC) has designed and tested a nominal 10-MeV prototype Pulsed Photonuclear Assessment (PPA) inspection system to detect shielded nuclear material. This report highlights two specific areas that will provide further PPA technology enhancements, namely, an optimal gamma-ray detection system and the off axis radiation detection sensitivity. Detection of low-atomic number (Z) shielded nuclear material had been initially addressed by the inclusion of dedicated Geiger-Müller (GM) detectors co-located above each of the Photonuclear Neutron Detectors (PNDs). Several different radiation detectors were ... continued below

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Creator: Unknown. April 1, 2006.

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The Idaho National Laboratory (INL) along with the Los Alamos National Laboratory (LANL) and Idaho State University’s Idaho Accelerator Center (IAC) has designed and tested a nominal 10-MeV prototype Pulsed Photonuclear Assessment (PPA) inspection system to detect shielded nuclear material. This report highlights two specific areas that will provide further PPA technology enhancements, namely, an optimal gamma-ray detection system and the off axis radiation detection sensitivity. Detection of low-atomic number (Z) shielded nuclear material had been initially addressed by the inclusion of dedicated Geiger-Müller (GM) detectors co-located above each of the Photonuclear Neutron Detectors (PNDs). Several different radiation detectors were investigated to assess if this type of gamma-ray detector was optimal. The LND 719 GM detector was shown to have the best photon sensitivity and demonstrated an optimal ability to detect low-Z shielded nuclear material. Beyond the technical performance of this detector, its low cost and availability makes it a logical choice for a field-deployable system. In terms of off-axis detection sensitivity, simulation and benchmarking experiments have indicated that the PPA inspection system can successfully detect nuclear material (within 120 seconds) in various shielding configurations even when it is located at a distance of as much as 30 cm off the interrogating beam axis (the exact sensitivity to off-axis interrogations will be largely dependent on the actual shielding material). As a general rule, high-Z shielding will allow detection at larger off-axis distances than low-Z materials.

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  • Report No.: INL/EXT-06-11175
  • Grant Number: DE-AC07-99ID-13727
  • DOI: 10.2172/911807 | External Link
  • Office of Scientific & Technical Information Report Number: 911807
  • Archival Resource Key: ark:/67531/metadc889926

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • April 1, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 30, 2016, 7:03 p.m.

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Pulsed Photonuclear Assessment (PPA) Technology Enhancement Study, report, April 1, 2006; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc889926/: accessed December 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.