Download or read book The Release of Helium from Slightly Irradiated Boron Carbide and Boron Carbide silicon Carbide Plates written by J. C. Clayton and published by . This book was released on 1962 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Physically based Model for Helium Release from Irradiated Boron Carbide written by Carl Ernest Beyer and published by . This book was released on 1981 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physically Based Model for Helium Release from Irradiated Boron Carbide written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The model is based on the nucleation of nonequilibrium helium bubbles under high pressures. The bubbles subsequently act as traps and grow as the result of gas atom diffusion. Model predictions are compared with bubble densities, sizes, and helium release characteristics of irradiated boron carbide.

Download or read book Helium Generation and Diffusion in Graphite and Some Carbides 14 9 and 14 4 MeV Neutrons written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The cross section for the generation of helium in neutron irradiated carbon was found to be 654 mb at 14.4 MeV and 744 mb at 14.9 MeV. Extrapolating to 14.1 MeV (the fusion reactor spectrum) gives 615 mb. The diffusion of helium in dense polycrystalline graphite and in pyrographite was measured and found to be D = 7.2 x 10−7 m2s−1 exp ( -80 kJ/RT). It is assumed that diffusion is primarily in the basal plane direction in crystals of the graphite. In polycrystalline graphite the path length is a factor of .sqrt. 2 longer than the measured distance due to the random orientation mismatch between successive grains. Isochronal anneals (measured helium release as the specimen is steadily heated) were run and maximum release rates were found at 200°C in polycrystalline graphite, 1000°C in pyrographite, 1350°C in boron carbide, and 1350° and 2400°C (two peaks) in silicon carbide. It is concluded that in these candidates for curtain materials in fusion reactors the helium releases can probably occur without bubble formation in graphites, may occur in boron carbide, but will probably cause bubble formation in silicon carbide. 7 figures.

Download or read book Effect of Irradiation on Hot pressed Boron Carbide written by W. D. Valovage and published by . This book was released on 1955 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Irradiation Behavior of Bulk B4C and B4C SiC Burnable Poison Plates written by R. G. Gray and published by . This book was released on 1963 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helium Bubbles in Irradiated Boron Carbide Neutron Irradiation Between 540 and 2000 C written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Boron carbide, in nuclear reactor neutron absorber applications, generates large quantities of helium, some of which is trapped in small bubbles within the grains. Transmission electron microscopy was used to examine the size distribution, shape and density of these bubbles in boron carbide irraidated to temperatures between 540°C and 2000°C to burnups between 27 and 62 x 102° captures/cm3.

Download or read book Formation of the Helium Pores of Different Shape and Their Stability at High Superequilibrium Pressures in Neutron irradiated Boron Carbide written by V. Shcherbak and published by . This book was released on 2001 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactor Materials written by and published by . This book was released on 1963 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reactor Core Materials written by and published by . This book was released on 1958 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Abstracts of Papers written by American Chemical Society. Meeting and published by . This book was released on 1962 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1975 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Atomic Energy Research Reports for Sale by the U S Department of Commerce Office of Technical Services written by Business and Defense Services Administration and published by . This book was released on 1963 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List written by and published by . This book was released on 1948 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Progress Report Pressurized Water Reactor PWR Project for the Period written by and published by . This book was released on 1961-10 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metallurgical Society Conferences written by and published by . This book was released on 1967 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Power Reactor Instrumentation Systems Handbook written by Joseph M. Harrer and published by . This book was released on 1973 with total page 1052 pages. Available in PDF, EPUB and Kindle. Book excerpt: