Browsing Rensselaer Libraries by Subject "Nuclear engineering and science"
Now showing items 1-20 of 44
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A method for (n,alpha) and (n,p) cross section measurements using a lead slowing-down spectrometer
(Rensselaer Polytechnic Institute, Troy, NY, 2012-08) -
A new high energy resolution neutron transmission detector at the Gaerttner LINAC Center and isotopic molybdenum total cross section measurements in the keV-region
(Rensselaer Polytechnic Institute, Troy, NY, 2013-08)The Gaerttner LINAC Center at Rensselaer Polytechnic Institute is home to a 60 MeV electron linear accelerator (LINAC) that is used as a pulsed neutron source for TOF nuclear data experiments. High energy resolution total ... -
A pair of mesh-based phantoms representing ICRP-89 50th-percentile adult males and females for radiation protection dosimetry using Monte Carlo simulations
(Rensselaer Polytechnic Institute, Troy, NY, 2009-08) -
A study of shape-dependent partial volume correction in PET imaging using ellipsoidal phantoms fabricated via rapid prototyping
(Rensselaer Polytechnic Institute, Troy, NY, 2013-12)The data show that the shape effect in PET tumor imaging can be as large as 15% for ellipsoid phantoms with axis ratios of 2:1, volume of 1.15 cm3, and tumor-to-background activity concentration ratio of 9:1. This is ... -
An adaptive-in-temperature method for on-the-fly sampling of thermal neutron scattering data in continuous-energy Monte Carlo codes
(Rensselaer Polytechnic Institute, Troy, NY, 2015-12)While on-the-fly methods have recently been developed for higher energy regimes, the double differential scattering of thermal neutrons has not been examined in detail until now. In this dissertation, an on-the-fly sampling ... -
An inverse optimization method for patient-specific CT organ dose reduction involving tube current modulation
(Rensselaer Polytechnic Institute, Troy, NY, 2016-08)Three specific tasks are: First, to develop a procedure for computing organ doses with existing TCM scheme using a recently developed Monte Carlo code, ARCHER, and then using patient-specific anatomical information, such ... -
Charge-dependent conformations and dynamics of PAMAM dendrimers revealed by neutron scattering and molecular dynamics
(Rensselaer Polytechnic Institute, Troy, NY, 2013-08)Aside from structural comparisons between MD simulations and experiments, we utilized MD simulation to decipher the previously reported QENS experimental observation that the segmental dynamics of PAMAM dendrimer would ... -
Computational methods in stellarator divertor topology design and the ARIES-CS
(Rensselaer Polytechnic Institute, Troy, NY, 2012-12) -
Design and construction of a large area detector system and neutron total cross section measurements in the energy range 0.4 to 20 MeV
(Rensselaer Polytechnic Institute, Troy, NY, 2011-12) -
Design of a cold moderator for total cross section measurements of moderator materials at sub-thermal energies
(Rensselaer Polytechnic Institute, Troy, NY, 2022-12)In order to extend the neutron cross section measurement capability to below 0.001 eV, the sub-thermal neutron flux of the existing enhanced thermal target needed to be improved at the Rensselaer Polytechnic Institute (RPI) ... -
Development of a mechanistic model for forced convection subcooled boiling
(Rensselaer Polytechnic Institute, Troy, NY, 2014-08)The complete model is then applied to simulations of subcooled boiling in nuclear reactor subchannels consistent with the operating conditions of the AP1000 pressurized water reactor. The effects of both axial and lateral ... -
Development of a radiation dose reporting software for X-ray computed tomography (CT)
(Rensselaer Polytechnic Institute, Troy, NY, 2012-08) -
Development of ARCHER -- a parallel Monte Carlo radiation transport code -- for X-ray CT dose calculations Using GPU and coprocessor technologies
(Rensselaer Polytechnic Institute, Troy, NY, 2014-08)Monte Carlo methods are the gold standard in radiation dose calculations with heterogeneous patient geometries and complicated irradiation conditions such as multi-detector CT scan. The long computation time has historically ... -
Development of CT scanner models for patient organ dose calculations using Monte Carlo methods
(Rensselaer Polytechnic Institute, Troy, NY, 2010-05) -
Development of experimental and analytical methods for low-rate (α,n) neutron source characterization
(Rensselaer Polytechnic Institute, Troy, NY, 2022-08)The production of (α,n) neutrons occurs intrinsically for many important nuclear materials which contain actinide species and low-mass nuclides. Actinides are fundamentally radioactive due to instability caused by their ... -
Development of materials for advanced nuclear fuel cycle applications
(Rensselaer Polytechnic Institute, Troy, NY, 2017-12)Material limitations are the most significant obstacles to the implementation of advanced nuclear fuel cycles. These limitations occur throughout the nuclear cycle and include key components of the fuel cycle such as the ... -
Efficient coupling algorithms and reduced-order methods for high-fidelity multiphysics simulations of nuclear reactors
(Rensselaer Polytechnic Institute, Troy, NY, 2018-08)The Residual Balance method and PGD each address parallel challenges of high-fidelity multiphysics simulations. The Residual Balance method is a coupling scheme that helps multiphysics simulations run efficiently. Proper ... -
Enhancing monte carlo modeling workflows with a metamodel-driven approach for nuclear reactor analysis
(Rensselaer Polytechnic Institute, Troy, NY, 2023-05)Nuclear simulation programs are diverse and copious; one can easily find a myriad of programs for modeling applications ranging from neutronics to thermal-hydraulics to species transport and corrosion. Furthermore, it is ... -
GPU-based Monte Carlo source modeling and simulation for radiation therapy involving Varian TrueBeam LINAC
(Rensselaer Polytechnic Institute, Troy, NY, 2018-08)Monte Carlo particle transport methods are well recognized as the most accurate approach to dose calculations for radiation therapy treatment planning. However, the lengthy computation time due to the inherent statistical ... -
Improving prompt temperature feedback by stimulating doppler broadening in heterogeneous composite nuclear fuel forms
(Rensselaer Polytechnic Institute, Troy, NY, 2017-08)Improvements in negative prompt temperature feedback are proposed by developing a tailored thermal resistance in the nuclear fuel. In the event of a large reactivity insertion, the thermal resistance allows for a faster ...