Pulsed, Photonuclear-induced, Neutron Measurements of Nuclear Materials with Composite Shielding

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Active measurements were performed using a 10-MeV electron accelerator with inspection objects containing various nuclear and nonnuclear materials available at the Idaho National Laboratory’s Zero Power Physics Reactor (ZPPR) facility. The inspection objects were assembled from ZPPR reactor plate materials to evaluate the measurement technologies for the characterization of plutonium, depleted uranium or highly enriched uranium shielded by both nuclear and non-nuclear materials. A series of pulsed photonuclear, time-correlated measurements were performed with unshielded calibration materials and then compared with the more complex composite shield configurations. The measurements used multiple 3He detectors that are designed to detect fission neutrons between ... continued below

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Jones, James; Haskell, Kevin; Waston, Rich; Geist, William; Thron, Jonathan; Freeman, Corey et al. July 1, 2011.

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Active measurements were performed using a 10-MeV electron accelerator with inspection objects containing various nuclear and nonnuclear materials available at the Idaho National Laboratory’s Zero Power Physics Reactor (ZPPR) facility. The inspection objects were assembled from ZPPR reactor plate materials to evaluate the measurement technologies for the characterization of plutonium, depleted uranium or highly enriched uranium shielded by both nuclear and non-nuclear materials. A series of pulsed photonuclear, time-correlated measurements were performed with unshielded calibration materials and then compared with the more complex composite shield configurations. The measurements used multiple 3He detectors that are designed to detect fission neutrons between pulses of an electron linear accelerator. The accelerator produced 10-MeV bremsstrahlung X-rays at a repetition rate of 125 Hz (8 ms between pulses) with a 4-us pulse width. All inspected objects were positioned on beam centerline and 100 cm from the X-ray source. The time-correlated data was collected in parallel using both a Los Alamos National Laboratory-designed list-mode acquisition system and a commercial multichannel scaler analyzer. A combination of different measurement configurations and data analysis methods enabled the identification of each object. This paper describes the experimental configuration, the ZPPR inspection objects used, and the various measurement and analysis results for each inspected object.

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  • Institute of Nuclear Material Management 52nd Annual Meeting,Palm Desert, California,07/17/2011,07/21/2011

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  • Report No.: INL/CON-11-20975
  • Grant Number: DE-AC07-05ID14517
  • Office of Scientific & Technical Information Report Number: 1023466
  • Archival Resource Key: ark:/67531/metadc831155

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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.

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  • July 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • June 17, 2016, 10:26 p.m.

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Jones, James; Haskell, Kevin; Waston, Rich; Geist, William; Thron, Jonathan; Freeman, Corey et al. Pulsed, Photonuclear-induced, Neutron Measurements of Nuclear Materials with Composite Shielding, article, July 1, 2011; Idaho Falls, Idaho. (digital.library.unt.edu/ark:/67531/metadc831155/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.