Showing papers in "Nuclear Engineering and Design in 1981"

TL;DR: In this paper, the authors present the general theory and several applications to a turbine blade refractory alloy, including the description of sequence effects and creep-fatigue interaction, and generalization for three-dimensional conditions, where anisotropic damage effects are possible, is discussed.

TL;DR: A survey on the theoretical and experimental work on single-phase natural circulation loops (thermosyphons) can be found in this article, which includes available modeling methods (analytical and numerical) to describe steady-state flows, transients and stability characteristics of the various loops.

TL;DR: In this paper, the effects of reduced integration, mesh size, and element type on the accuracy of a penalty-finite element based on the theory governing thick, laminated, anisotropic composite plates are investigated.

TL;DR: A survey of the recent literature on the structural behaviour under variable repeated loads, with emphasis on developments which relaxed some of the above assumptions, but preserved the character of generalization of limit analysis typical of the ‘classical’ shakedown theory and methods of analysis and design.

TL;DR: In this paper, the development and characteristics of the TRIGA fuels are described, along with empirical correlations relating irradiation behavior and fission product retention to temperature, composition, burnup, and neutron flux and fluence.

TL;DR: In this paper, an effective solution procedure for finite element thermo-elastic-plastic and creep analysis with temperature-dependent material properties is presented, which is theoretically analyzed and numerically tested for its stability and accuracy properties.

TL;DR: In this article, a nonlinear finite element method is presented which can treated the structural behavior of the tanks in conjunction with fluid, including the dynamics and buckling, both the formulation and computer implementation aspects are presented.

TL;DR: In this paper, the authors have obtained thermodynamic and transport properties of mixed oxide fuel and stainless steel type 316, over a very wide range of temperatures, including saturation vapor pressure, latent heat of vaporization and specific volume of saturated vapor.

TL;DR: In this paper, an analytical approximate solution to an inverse problem of temperature field in the thermal stresses theory is presented, based upon the so-called internal responses of a different kind, and an approximate form of surface temperature for a slab is predicted.

TL;DR: In this article, a hydrodynamic model is proposed for defining the mechanisms responsible for the departure from nucleate boiling in cooling water under forced convection. But the model is not suitable for the case of uniformly heated round tubes and annuli, as well as non-uniform heat flux profiles.

TL;DR: In this article, a summary of fluid damping for circular cylinders vibrating in stationary fluid, cross flow, and parallel flow is presented, along with a simulation of the effects of different types of motion.

TL;DR: In this article, a semi-empirical model for adiabatic two-phase annular flow is extended to predict the critical heat flux (CHF) in a vertical pipe, and the model exhibits a sharply declining curve of CHF versus steam quality at low X, and is relatively independent of the heat flux distribution.

TL;DR: In this article, the dependence of phase separation on different parameters, such as inlet quality, mass flux and separation angle, is discussed, and detailed experiments have been performed with air/water mixtures in vertical wyes and tees to provide a data base for the development and verification of analytical models.

TL;DR: An exact analysis of Stokes' problem for an infinite vertical plate, whose temperature varies linearly with time, has been presented in this article, where it is observed that the velocity near the plate increases with the timet, and the Grashof numberGr.

TL;DR: In this article, a large number of crack tip parameters can be used in a plastic fracture resistance curve approach, such as the crack tip opening angle parameter, which can be valid for extensive stable crack growth.

TL;DR: In this article, the phenomenology of core-melt accidents in dry containments was examined for the purpose of identifying the margins of safety in such Class-9 situations, where the scale (geometry) effects appear to crucially limit the extent (severity) of steam explosions.

TL;DR: In this paper, the physical properties and engineering concepts of reversed field pinch reactors are presented and illustrated by two recent designs developed at Culham Laboratory and Los Alamos Scientific Laboratory, which employ ohmic heating to ignite the plasma, operate in the pulsed mode without refuelling during the burn and utilize superconducting magnetic field coils.

TL;DR: An iterative procedure is presented that allows computation of spectrum-consistent parameters for the description of earthquake/transient motion by treating the strong motion portion of the earthquake event as being a stationary Gaussian random process thereby allowing a mapping between the response spectrum and power spectral density function parameters.

TL;DR: In this article, a computer program was developed to study pump start-up transients and the results showed that an increase in fluid inertia increases the acceleration head, while a decrease in the moment of inertia of rotating parts decreases the acceleration heads.

TL;DR: In this paper, the void fraction distribution in low flow rate forced convection subcooled boiling of water in a heated vertical tube at steady-state conditions was analyzed using gamma attenuation and X-ray radiography techniques.

TL;DR: In this paper, the applicability of the tensor function theory to the development of elaborate and rational constitutive equations of inelasticity is discussed to facilitate the description of the complicated in-elastic response of structural components.

TL;DR: In this article, a model to calculate local heat transfer coefficients between the containment atmosphere and the walls of a pressurized water reactor containment building after a loss-of-coolant accident has been developed.

TL;DR: In this paper, the problem of steady propagation of a quench front, based on a simple theory, is solved by the Wiener-Hopf method, which yields the temperature distribution in the slab and an equation for the speed of the front.

TL;DR: In this paper, the motion of a semi-infinite incompressible, viscous electrically conducting fluid, caused by the oscillation of a plane vertical plate under the action of a transverse magnetic field, has been studied on taking into account the presence of free convection currents.

TL;DR: In this paper, a substructure procedure is applied to the final design of the pile foundation of the Reactor Building of Angra 2 in Brazil, which is based on 202 endbearing piles and 88 floating piles of 15 m length.

TL;DR: In this article, the escape behavior of various fission product isotopes from defective fuel rods in PWRs and BWRs is analyzed and the inferred effective diffusion constants for fission gases are noticeably higher for defective rods than for intact fuel rods.

TL;DR: In this article, a theoretical model is developed which allows a consistent treatment of the wall heat flux in an inverted-annular film boiling regime, based on an analytical solution of the energy conservation equations in the vapor and liquid regions downstream of the quench front.

TL;DR: In this paper, an experimental study was conducted on transient sodium boiling in a 19pin electrically heated LMFBR fuel subassembly mockup under loss-of-flow conditions.

TL;DR: STARFIRE as mentioned in this paper is a conceptual commercial tokamak electrical power plant based on the deuterium/tritium/lithium fuel cycle, which is considered to be the tenth in a series of commercial fusion power plants.

TL;DR: In this article, a model based on equilibrium thermodynamics was developed to analyse the EXCOBULLE experiments, where large rates of heat and mass transfer are required to obtain agreement with the experiments.