... that allowed samples to be directly exposed to the proton beam at the Los Alamos Neutron Science Center. The water system that supplied the manifold provided a means for controlling water chemistry, measuring dissolved hydrogen concentration, and measuring the effects of water radiolysis and water quality...

... A neutron spectrometer has been developed to measure energy spectra of neutrons in the energy range from thermal to a few tens MeV. The detector consists of a spherical polyethylene moderator with a diameter of 30 cm and 19 pairs of 6 Li- and 7 Li-glass scintillators arranged along...

... Recent studies have shown that for the older East and West water reactor pressure vessel steels there is a similar degradation in mechanical properties during equivalent neutron irradiation. In both cases with the identification of and a reduction in the deleterious element concentration...

... A methodology has been investigated for verifying that a neutron energy spectrum measured for an environment correctly predicts the bulk displacement damage observed in a silicon electronic device. The technique makes use of a package of silicon bipolar transistors (2N2222A), monitor activation...

... In Tore-Supra, neutron productions up to 10 20 neutrons/year are expected. Calculations based on 1-D and 3-D codes have been made before the assembly phase. A strategy has been established to reconcile high neutron levels with the needs of an experimental device, i.e. access to the tokamak...

..., miniature tension specimens have been found to serve as very useful tools for application to both fundamental studies and alloy screening studies. tension specimens miniaturization radiation effects neutrons property-property correlations neutron spectra displacement rate size effects Frank...

... High Energy Transport Code (HETC) calculations were performed for 800-MeV protons incident on thin targets of various materials. The objective was to enhance the fraction of high-energy neutrons ( E > 100 MeV) while maintaining a reasonable yield. A high yield of neutrons with energies...

... by dosimetry techniques, involving reaction rate measurements. The relevance of these exposure parameters with respect to experimental results was the topic of the workshop under discussion. neutrons fission fusion damage fluence irradiation effects A. Alberman 1and R. Dierckx 2 European...

... méthode itérative. Les sections efficaces de déplacements d'atomes “ j ”, selon l'énergie de neutron, sont déduites par convolution avec les spectres d'énergie de primaires de type “ i ”. En outre, le code COMPOSI permet de calculer directement les déplacements créés par le recul de particules chargées...

... Single crystal α-Al 2 O 3 (sapphire) has been neutron irradiated over a range of dose, dose rate and neutron energy spectra at temperatures from 60 to 310°C. Values of optical absorption at 400 nm, the peak of the aluminum vacancy absorption band, were plotted against damage dose expressed...

... aging, background underlying small angle nuclear scattering (SANS), and microstructural and positron annihilation studies are reported. The role of phosphorus in the neutron irradiation embrittlement of lowcopper steels is described. Recent results from modelling studies are noted and the results from...

... neutrons titanium-modified alloys cold-worked Raymond J. Puigh^ and Frank A. Garner^ Neutron-Induced Swelling in Cold-Worked Titanium-Modified AISI 316 Alloys REFERENCE: Puigh, R. J. and Garner, F. A., "Neutron-Induced Swelling in Cold-Worked Titanium-Modified AISI 316 Alloys," Radiation-Induced...

... and temperatures do not seem to affect the spatial distribution of voids in the band. These results are compared with the results obtained on high-purity aluminum irradiated with fast neutrons. The bubble formation behavior in the grain interior and in the band containing voids is briefly described. The effect...

... Spectrum integrated cross sections for 6 Li and 10 B from five benchmark fast reactor neutron fields are compared with calculated values obtained using the ENDF/B-V Cross Section Files. The benchmark fields include the Coupled Fast Reactivity Measurements Facility (CFRMF) at the Idaho National...

.... The results provide support to the expression in the model to describe the time dependence of the copper precipitate contribution to the increase in yield strength. Accelerated irradiation and surveillance data are present for both the Magnox and PWR PV steels. Modeling of data includes variations on neutron...

... Radiation hardening and embrittlement of the BH 70 steel heat treated to different microstructures (tempered martensite, tempered bainite, and tempered mixed ferrite-perlite, bainite, and martensite after neutron irradiation about 7 × 10 23 n/m 2 > 1 MeV at 285°C) were compared...

... Techniques have been developed for preparing, irradiating, and conducting tensile tests on small-diameter (0.25 to 0.5 mm) wire specimens to determine the effects of high-energy neutron and proton irradiation on mechanical properties. Gage sections were produced electrolytically, and the tensile...

... and temperature dependence of swelling. radiation swelling voids austenitic alloys iron-nickel-chromium alloys compositional dependence neutrons ion bombardment Frank A. Garner^ and Howard R Brager^ Swelling of Austenitic Iron-NickelChromium Ternary Alloys During Fast Neutron Irradiation REFERENCE...

... the point defect and microstructural densities undergo an upward shift with displacement rate. Frank loops dislocations irradiated metals charged particles neutrons displacement rate temperature stress 12 F. A. Garner and W. G. Wolfer A MODEL FOR THE EVOLUTION OF NETWORK DISLOCATION DENSITY...

... The high-energy (>10 keV) recoil spectra induced in metals by 16-MeV protons have been predicted to be similar to that induced by 14-MeV neutrons. The damage induced in nickel and niobium by 16-MeV protons and 14-MeV neutrons has been evaluated by transmission electron microscopy and flow...