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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 11 of 11 for “"criticality safety"”.
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Coupled differential and integral data analysis for improved uncertainty quantification of the ⁶³,⁶⁵Cu cross section evaluations
… applications, particularly those dealing with criticality safety. The current standard for the resonance evaluation of the two copper isotopes, ⁶³,⁶⁵Cu, has been determined to result in poor modeling performance. Therefore a new resonance evaluation of the two copper isotopes is vital to …
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A Monte Carlo framework for nuclear data uncertainty propagation via the windowed multipole formalism
… and ¹⁵⁷Gd cross sections was calculated for two criticality safety benchmarks, and a beginning-of-life PWR model. The uncertainty of several reaction rate ratios due to the uncertainty in the ¹⁵⁷Gd cross section was also calculated for the PWR model. The resonances of ²³⁸U and ¹⁵⁷Gd that have the …
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Criticality alarm system design guide with accompanying alarm system development for the Radiochemical Processing Laboratory in Richland, Washington
… instructional manual was created to guide criticality safety engineers through the process of designing a criticality alarm system (CAS) for Department of Energy (DOE) hazard class 1 and 2 facilities. Regulatory and technical requirements were both addressed. A list of design tasks and …
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The design and evaluation of an international plutonium storage system
… 100 MT storage facility was shown to meet criticality safety requirements for a range of operational and accident scenarios. From an institutional perspective, a hybrid organizational structure drawing on rganizational features of the United Nations Security Council and the International …
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Development of sensitivity analysis with the use of TSUNAMI-3D sensitivity coefficients for benchmark uncertainty analysis
… in the International Handbook of Evaluated Criticality Safety Benchmark Experiments Uncertainty Guidelines. The process was duplicated from the benchmark evaluations to ensure the process was well understood as well as validate the computer code and cross section library used in this work. …
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Benchmarking of the RAPID Eigenvalue Algorithm using the ICSBEP Handbook
… on a few problems from the ICSBEP (International Criticality Safety Benchmark Evaluation Project) Handbook. RAPID is developed based on the MRT (Multi-Stage Response-Function Transport) methodology and it uses the fission matrix (FM) method for performing eigenvalue calculations. RAPID has already …
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A novel framework for data-driven modeling, uncertainty quantification, and deep learning of nuclear reactor simulations
… as outside the reactor such as spent fuel and criticality safety. The framework utilizes various computer models in the nuclear area, which are already validated and known to provide accurate results. The framework is supported and validated by a wide range of experimental data from different …
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Measurement of 50Cr and 53Cr Neutron Capture Cross Sections for Nuclear Technology at CERN n_TOF and HiSPANoS
… requires nuclear data of high quality, serving criticality safety benchmarks to identify and set priorities about those that need to be improved. In this context, because of its significant abundance in stainless steel, chromium plays an important role in some benchmarks focused on structural …
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On-the-fly nuclear data processing methods for Monte Carlo simulations of intermediate and fast spectrum systems
… unconservative biases (>100 pcm) in criticality safety calculations. The principal underlying assumption of the probability table method is also tested by comparing the results it yields with results that are averaged over many independent simulations, each using a single, independent …
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Development of a Novel Fuel Burnup Methodology and Algorithm in RAPID and its Benchmarking and Automation
… including core design and spent fuel storage safety and safeguards analysis. For core design, specifically during refueling, full- core pin-wise, axially-dependent burnup distributions are necessary to determine assembly positioning to efficiently utilize fuel resources. In spent fuel storage …
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MULTI-PHYSICS DESIGN AND ANALYSES OF LONG LIFE REACTORS FOR LUNAR OUTPOSTS
… power reactors is constrained by the launch safety requirements. These include ensuring that the bare reactor core remains safely subcritical when submerged in water or wet sand and flooded with seawater in the unlikely event of a launch abort accident. Increasing the amount of fuel in the …