Showing papers in "Nuclear Engineering and Design in 1973"

TL;DR: In this paper, the authors identify the causes and mechanisms of thermal-hydrodynamic instabilities in boiling flow in a water-cooled reactor, an evaporator, or an electronic cooling system.

TL;DR: The physical processes involved in the rewetting of high temperature surfaces have been shown to be identical for both falling water films and bottom flooding as discussed by the authors, and the variation of rewetting velocity with mass flow has been determined, and shown to have independent of hydraulic diameter over the range 0.2-6 mm of practical interest.

TL;DR: In this article, the influence of through-soil coupling between adjacent structures on the seismic loading of nuclear reactors has been investigated by considering a soil-structure interaction model in which several three-dimensional flexible structures are bonded to an elastic half-space.

TL;DR: In this paper, the axial differences in static pressure for two-phase flow along a pipe are discussed in relation to the evaluation of two phase friction equations derived from mixing length theory and compared with data covering the following fluid conditions at the wall: bubble flow, wavy gas-liquid interface, flow with very small bubbles, attached wall bubbles, and dry wall.

TL;DR: A summary of typical procedures for vibration testing and parameter identification is presented in this article, along with a detailed discussion of the application of the method to an actual structure in an attempt to illustrate the effectiveness of the technique and familiarize the reader with the type of problems encountered.

TL;DR: In this paper, the feasibility of using laser-driven fusion pulses for the commercial generation of electric power was investigated, and a wetted-wall concept was proposed for electric power plants based on fusion energy sources.

TL;DR: In this paper, a general theory of elastic-viscoplastic materials and its experimental motivation are discussed, and solutions and methods of solution are discussed for problems of quenching, thermal shocks, internal heat generation and machine parts design.

TL;DR: Lithium hydride is a crystalline material that is a relatively stable compound and uses include neutron shielding or moderating because of a high hydrogen density and the employment of the 6Li isotope as discussed by the authors.

TL;DR: In this paper, the application of the general thermoviscoelastic-plastic theory to the analysis of the coupled thermomechanical response of a class of crystalline solids is considered.

TL;DR: The current version of the computer program SAP for the static and dynamic analysis of linear structural systems is described and the main advantages of the program as a general purpose code become apparent.

TL;DR: In this paper, the authors analyzed the steady state heat flow in domains of regular polygonal shape with inner circular boundaries and derived an approximate expression for the shape factor using conformal mapping.

TL;DR: In this article, an analytical technique was developed for determining the frequencies of continuous curved beams with the two extreme ends hinged-hinged, hinged fixed, and fixed-fixed.

TL;DR: In this paper, the authors describe the floating nuclear plant concept with special reference to its advantages and its novel features, including the design of the platform, the safety analysis and also the analysis and specification of plant motions due to environmental effects such as wind, waves and earthquakes.

TL;DR: In this paper, the gamma-ray production for all interactions involving neutrons with energies up to 15 MeV was included; i.e., the approximation made here is that gamma rays were produced only by neutron capture.

TL;DR: In this article, a helically wire-wrapped, 217 pin, full-scale model of an LMFBR fuel assembly is presented for verification of thermal hydraulic computer codes and wire-wrap mixing models.

TL;DR: In this paper, the results obtained using the earthquake-like base motion are found to be in fairly close agreement, except for slight differences in the scattering of results and difference in the maximum response obtained which can be corrected using appropriate scaling factors.

TL;DR: In this paper, the convergence of a mixed finite element scheme for plate bending, previously proposed by the present authors, is discussed on the basis of functional analysis, and several kinds of energy inequalities are established to assure the stability of the approximate solution.

TL;DR: In this paper, a model was developed for computing the relevant properties of unbiased random packings in a semi-infinite vessel with a plane wall, by means of quadratic equations whose coefficients depend on the cylinder-to-sphere diameter ratio.

TL;DR: The results of three separate test programs which were conducted to determine the feasibility of simulating strong motion earthquake effects using dynamite blasting techniques are presented in this paper, which indicates that the simulation of strong earthquake excitations using subsurface blasting techniques is a valuable testing tool.

TL;DR: In this paper, several analyses for the isothermal creep behavior of a thin, constant thickness, circular crosssection cylindrical shell under the action of conbined bending and internal pressure loading are presented in a way that should be helpful for general pipework design.

TL;DR: In this article, a least square boundary point matching method is employed to determine the temperature distributions and deformations of rectangular plates with circular elastic inclusions, and solutions for two problems have been obtained.

TL;DR: In this article, the radii of nucleation sites were predicted by applying the pre-boiling pressure history theory to a new cavity model in agreement with the experimental results, based on which the authors calculated the radius of the nucleation site.

TL;DR: A summary of damping values for structures and equipment obtained in several full-scale dynamic tests performed on a research reactor, three experimental power reactor plants, and a commercial power reactor plant is given in this article.

TL;DR: In this paper, the authors used the partition method to formulate a set of equations which were used to calculate the natural frequencies and mode shapes of shells of revolution with variable thickness and found that moderate variations in shell thickness do not appreciably affect the natural frequency, but may significantly affect mode shapes.

TL;DR: In this article, the Monte-Carlo code OGRE-G is modified to calculate spectral and spatial distributions of the z-component of the backscattered gamma-ray current.

TL;DR: In this paper, the response of a constructed nuclear power plant to earthquake excitations is predicted based on experimental testing of the reactor plant and using test results to develop a mathematical model of the system.

TL;DR: In this article, a Monte Carlo model of the subsurface gamma density gauge is proposed to account for the effect of the shielding between source and detector in a simplified manner, and the influence of Zeq, ZA and a finite volume of the measured medium on the gauge response is studied attentively.

TL;DR: In this article, the vertical soil-structure interaction problem is investigated by coupling an N -mass lumped mass structure to a two-dimensional elastic half space, and the effects of interaction are evaluated by comparing free-field acceleration spectrum response curves with similar curves determined from foundation motion.

TL;DR: In this paper, the linear theory of thermoelasticity is modified to include the case where the thermal and mechanical properties of the material depend on temperature, and the governing coupled equations are derived using the principles of mechanics and thermodynamics.

TL;DR: In this article, the authors argue that neither such a proposition is necessary, nor is the evidence conclusive enough to justify the change of a practice where the 3-D phenomena of the earthquake has long been recognized.