Showing papers in "Nuclear Technology in 1968"
99 citations
TL;DR: A computational model based on a rigorous application of the first law of thermodynamics together with heat and mass transfer laws, makes no a priori assumptions concerning the thermodynamic path as mentioned in this paper.
Abstract: A computational model, based on a rigorous application of the first law of thermodynamics together with heat and mass transfer laws, makes no a priori assumptions concerning the thermodynamic path ...
18 citations
TL;DR: In this paper, it was shown that both circular and circular anisotropic beams of protons at energies well above the pion-production threshold can achieve very high-intensity beams at energies above pion production threshold.
Abstract: Recent advances in accelerator technology make possible the attainment of very-high-intensity beams of protons at energies well above the pion-production threshold. It appears that both circular an...
18 citations
TL;DR: In this paper, solid cylindrical specimens of the monocarbides of Ti, Zr, Ta, Nb, and W, made by 1) hot pressing, 2) slip casting and sintering, and 3) explosion-pressing, were irradiated.
Abstract: Solid cylindrical specimens (½- × ½-in.) of the monocarbides of Ti, Zr, Ta, Nb, and W, made by 1) hot pressing, 2) slip casting and sintering, and 3) explosion-pressing and sintering, were irradiat...
17 citations
15 citations
Journal Article•
15 citations
12 citations
TL;DR: In this article, the reaction kinetics of graphite with hydrogen at high temperatures and pressures was studied by measuring the rate of weight loss and surface recession for graphite samples under experimental con...
Abstract: The reaction kinetics of graphite with hydrogen at high temperatures and pressures was studied by measuring the rate of weight loss and surface recession of graphite samples. Under experimental con...
12 citations
TL;DR: In this paper, X-ray void measurement principles and interpretation are applied to rapid void changes in boiling liquid metals and measurements on a boiling potassium loop show that millisecond response times are ne
Abstract: X-ray void measurement principles and interpretation are applied to rapid void changes in boiling liquid metals Measurements on a boiling potassium loop show that millisecond response times are ne
11 citations
TL;DR: A chemical process for the separation of 243Am from 244Cm for use in the production of kilogram quantities of 244cm was developed in this paper, where americium is oxidized to ion in concentrated...
Abstract: A chemical process has been developed for the separation of 243Am from 244Cm for use in the production of kilogram quantities of 244Cm. In the process, americium is oxidized to ion in concentrated ...
11 citations
TL;DR: In this article, the authors describe the characteristics of Californium-252 as an intense neutron emitter and its unique characteristics may make new uses for neutrons practical, which can replace other neutron sources in many applications.
Abstract: Californium-252 is an intense neutron emitter. It can replace other neutron sources in many applications. Its unique characteristics may make new uses for neutrons practical.
TL;DR: A diffusion-cell type of carbon meter is used for continuous measurement of the carburizing potential of liquid sodium as discussed by the authors, which is useful for continuous carburization of sodium.
Abstract: A diffusion-cell type of carbon meter is useful for continuous measurement of the carburizing potential of liquid sodium. The iron sensing element is small and long lived and responds rapidly to ch...
TL;DR: In this article, the authors measured the spectrum of 238PuO2 with a 6Li fast-neutron spectrometer and showed a peak at 2.3 Me V and a maximum neutron energy of ≍ 4.8 Me V.
Abstract: The neutron spectrum of 238PuO2 was measured with a 6Li fast-neutron spectrometer. The neutrons derive mainly from the (α,n) reaction with 18O. The spectrum shows a peak at 2.3 Me V and a maximum neutron energy of ≍ 4.8 Me V.
TL;DR: In this paper, the embrittlement condition of the Army SM-1A reactor pressure vessel, as modified by the recently completed in-place anneal, was assessed and an analysis was made of the reembrittlement behavior of the vessel steel with subsequent radiation service.
Abstract: : The embrittlement condition of the Army SM-1A reactor pressure vessel, as modified by the recently completed in-place anneal, was assessed and an analysis was made of the reembrittlement behavior of the vessel steel with subsequent radiation service. Experimental results from the reactor surveillance program developed through one complete irradiation and annealing cycle are presented, together with a summary of experimental information on the annealing response of the vessel steel (A350-LF1, Mod.) from accelerated irradiation programs. These data indicate a 0 deg F maximum pressure vessel wall Charpy-V 30 ft-lb transition temperature after the in-place anneal versus a -80 deg F preservice transition temperature (based on the notch-ductility properties of a duplicate ring forging). The maximum Charpy-V 30 ft-lb transition temperature of the pressure vessel before the annealing operation was estimated at 190 deg F. A projection of postanneal pressure vessel lifetime in terms of neutron fluence >0.5 Mev was derived from spectra calculations and the experimentally predicted reirradiation response of the pressure vessel steel. The maximum permissible vessel wall fluence is estimated at 5.5x10 to the 19th power n/sq cm > 0.5 Mev. This is comparable to 124.7 Megawatt years of reactor operation. (Author)
TL;DR: In this article, the specific activity of 131I solutions is calculated from the measured 131I activity and the total iodide content, which is measured rapidly (within five minutes) and accurately (relative sta...
Abstract: The specific activity of 131I solutions is calculated from the measured 131I activity and the total iodide content. The latter is measured rapidly (within five minutes) and accurately (relative sta...
TL;DR: In this paper, the effects of irradiation were rationalized on the behavior of helium which is formed in the metal as a result of the 10B(n,α)7 Li reaction with thermal neutrons.
Abstract: The stress-rupture properties of two heats of Hastelloy N tubing have been determined at 760°C in the irradiated and unirradiated conditions. Irradiation reduced the rupture life and the rupture strain but produced no detectable effects on the creep rate. The effects of irradiation are rationalized on the basis of the behavior of helium which is formed in the metal as a result of the 10B(n,α)7 Li reaction with thermal neutrons.
TL;DR: A sol-gel process for preparing dense microspheres of PuO2 was developed in this paper, which has three major operations: 1) preparation of an aqueous sol; 2) removal of water to give solid gel particles; and 3)
Abstract: A sol-gel process for preparing dense microspheres of PuO2 was developed. The process has three major operations: 1) preparation of an aqueous sol; 2) removal of water to give solid gel particles; ...
TL;DR: In this article, the uncertainties in physics parameters and in fuel cost of fast power reactors due to current nuclear data uncertainties are considered for two sodium-cooled, oxide-fueled, 1000 MW(e) reactors.
Abstract: The uncertainties in physics parameters and in fuel cost of fast power reactors due to current nuclear data uncertainties are considered for two sodium-cooled, oxide-fueled, 1000 MW(e) reactors. On...
TL;DR: Nuclear reactor space power system concept using thermionic diodes, heat pipes and rod control, emphasizing neutronic aspects and feasibility as mentioned in this paper, using a nuclear nuclear power system.
Abstract: Nuclear reactor space power system concept using thermionic diodes, heat pipes and rod control, emphasizing neutronic aspects and feasibility
TL;DR: In this paper, specific fabrication procedures were developed for incorporating chemically stable europium compounds as neutron absorbers, and the results showed that lanthanide compounds can be used as neutron absorbers.
Abstract: Recent technological advancements have stimulated interest in lanthanide compounds as neutron absorbers. Specific fabrication procedures were developed for incorporating chemically stable europium ...
TL;DR: The thermal conductivity of PuO2 as determined by thermal diffusivity measurements is presented for the temperature range 250 to ≍1200°C as discussed by the authors. But the authors do not consider the effect of temperature variations.
Abstract: The thermal conductivity of PuO2 as determined by thermal diffusivity measurements is presented for the temperature range 250 to ≍1200°C. Specimens of PuO2 with confirmed stoichiometry were fabrica...