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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"neutron spectrum"”.
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Neutron spectrum from 252Cf spontaneous fission
Measurements have been made of the neutron spectrum from the spontaneous fission of 252Cf in the restframe of the fragment by simultaneous observation of the neutron time-of-flight and the fragment velocity. The fragments were detected by means of thin film plastic scintillators in which the …
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Neutron Spectrum Unfolding of the University of Illinois Advanced Triga
Made available in DSpace on 2017-07-06T18:55:48Z (GMT). No. of bitstreams: 3 Peach_Robert_O_MS.pdf: 51648898 bytes, checksum: ada2b26ac6a1e9d6af56db4ca0d2aa76 (MD5) Peach_Robert_O_MS_ABS.pdf: 422968 bytes, checksum: 98d14c3de74eb794a3a98fec459d0ce7 (MD5) license.txt: 4813 bytes, checksum: …
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Design, Construction, and Calibration of a Proton Recoil Proportional Counter for Neutron Spectrum Measurements
Made available in DSpace on 2017-07-06T18:55:22Z (GMT). No. of bitstreams: 2 Mertogul_Remzi_MS.pdf: 40599039 bytes, checksum: e62ff031c4bb21e0db562a5c64ed9490 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1979
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FASPEC, a program to determine group constants for up to 47 groups in a fast neutron spectrum
… by a solution of the Infinite medium neutron transport equation. Flux contributions from inelastic scatter are included while those from neutron up-scatter are not. The energy spectrum considered is from 10 MeV to 0.625 eV. Required input is the atomic number density of each isotope, …
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An Experimental Study of the Neutron Spectrum and the Radial Power Distribution in a Fuel Element in the Illinois Advanced Triga Reactor
Made available in DSpace on 2014-12-11T17:26:12Z (GMT). No. of bitstreams: 1 7514187.pdf: 4500287 bytes, checksum: f6f8bd8d7345e0023e6c87ce9f41f32d (MD5) Previous issue date: 1975
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The Neutronic Design and Performance of the Indiana University Cyclotron Facility (IUCF) Low Energy Neutron Source (LENS)
Neutron scattering research is performed primarily at large-scale facilities. However, history has shown that smaller scale neutron scattering facilities can play a useful role in education and innovation while performing valuable materials research. This dissertation details the design and …
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Characterization and optimization of signal and background for the time-resolving magnetic recoil spectrometer on the National Ignition Facility
… through time-resolved measurements of the neutron spectrum. This information will be obtained with the next-generation Magnetic Recoil Spectrometer (MRSt) that will measure the neutron spectrum (12-16 MeV) with high accuracy (~5%), unprecedented energy resolution (~100 keV) and, for the …
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A neutron diffraction spectrometer
A single crystal neutron spectrometer using a copper crystal has been designed and constructed for the purpose of studying the low energy (<1 ev) neutron spectrum from the V.P.I. reactor. The basic theory necessary for the design, the details of the spectrometer, calibration data and method of …
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Evaluation of the bubble spectrometer performance in space-like neutron fields
… of six bubble detectors each with a different neutron energy threshold. To characterize the spectrometer in a space-like neutron field, a series of experiments were conducted with high-energy neutrons from 6.0×105 eV to 7.50 ×108 eV at the Los Alamos National Laboratory. The analysis of the …
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Neutron backgrounds in the Ricochet experiment
This paper explores the impact of neutron backgrounds on the Ricochet experiment. The purpose of the Ricochet experiment is to determine the existence of sterile neutrinos via coherent neutrino-nucleus scattering. Coherent neutrino-nucleus scattering is an ideal detection method because it is a …
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The use of reduced-moderation light water reactors for transuranic isotope burning in thorium fuel
… recycled in LWRs or fast reactors. The thermal neutron spectrum in LWRs is less suitable for burning TRUs as this causes a build-up of TRU isotopes with low fission probability. This increases the fissile feed requirements, which tends to result in a positive void coefficient (VC) and hence the …
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Soliton-like waves of nuclear burning in the neutron multiplicating media : (theory and computational approach)
… reactor, which generates self-propagating neutron-fission nuclear burning wave, that satisfies all conditions of inherent safety, was considered for the Feoktistov uranium-plutonium fuel cycle. For simplicity the neutron spectrum was assumed the same as the fission spectrum. A case with …
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PREDICTING ACTIVATION OF EXPERIMENTS INSIDE THE ANNULAR CORE RESEARCH REACTOR
… is achieved by using MCNP to model the neutron fluxes in the reactors central cavity where experiments are conducted using one of the four possible neutron spectra available in the ACRR. The desired neutron spectrum, experiment material composition, and reactor power level are then input …
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Core design and reactor physics of a breed and burn gas-cooled fast reactor
… reprocessing, recycle, or reuse of any kind. The neutronic requirements for B&B are strict and require an ultra-hard neutron spectrum. Therefore, the GFR is ideally suited for this fuel cycle. In the present work the B&B GFR concept evolved into two practical reactor designs, both of which build …
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RFD-1, a 1-D, 4-group code to calculate burnup cycles using mechanical spectral shift
… As the fuel-to-water ratio decreases, the neutron spectrum softens, thereby increasing core reactivity. Proposed mechanical spectral shift reactors utilize this concept. RFD-1, a 1-dimensional, 4-group code was developed to compute fuel burnup cycles for spectral shift reactors. The code …
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The Electrical Impedance Responses of Protective Oxide Scales on Stainless Steels That Are Immersed in Molten Lead-Bismuth-Eutectic Alloy at Temperatures Up to 600°C
… LBE is a candidate coolant for future fast-neutron-spectrum nuclear reactors and for accelerator-driven nuclear systems, in which the LBE can also act as the spallation target. Stainless steels, out of which such systems are usually fabricated, oxidize in the molten LBE. This research used …
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The electrical impedance responses of protective oxide scales on stainless steels that are immersed in molten lead-bismuth-eutectic alloy at temperatures up to 600°C
… LBE is a candidate coolant for future fast-neutron-spectrum nuclear reactors and for accelerator-driven nuclear systems, in which the LBE can also act as the spallation target. Stainless steels, out of which such systems are usually fabricated, oxidize in the molten LBE. This research used …
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Thermomechanical analysis of innovative nuclear fuel pin designs
… to operate with mixed oxide fuel and, a harder neutron spectrum and higher local fuel burnup compared to the traditional Light Water Reactors. The fissile content of the fuel is concentrated in two pancake like regions in the core separated by a blanket (fertile-only) region.
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Computer simulation of neutron capture therapy.
… computer the production and use of reactor neutron beams f or boron capture therapy of brain tumors. The simulation accounts for radiation dose distributions in tissue produced by fast neutrons and by neutron capture reaction products such as gamma rays, C -particles, protons, and heavy …
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