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Release Of Fission Products From Irradiated Aluminide Fuel At High Temperature
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Book Synopsis Release of Fission Products from Irradiated Aluminide Fuel at High Temperature by :
Download or read book Release of Fission Products from Irradiated Aluminide Fuel at High Temperature written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Irradiated uranium aluminide fuel plates of 40% U-235 enrichment were heated for the determination of fission products released under flowing helium gas at temperatures up to and higher than the melting point of fuel-cladding material. The release of fission products from the fuel plate at temperature below 500°C was found negligible. The firist rapid release of fission products was observed with the occurrence of blistering at 561 +- 1°C on the plates. The next release at 585°C might be caused by melting of the cladding material of 6061-Al alloy. The last release of fission product gases was occurred at the eutectic temperature of 640°C of U-Al(subscript x). The released material was mostly xenon, but small amounts of iodine and cesium were observed.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-05 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unstable Fission Product Release from UO2 Irradiated at High Temperature by : M. O. Tucker
Download or read book Unstable Fission Product Release from UO2 Irradiated at High Temperature written by M. O. Tucker and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fission product release from high burnup fuel during oxidation in air at 950 degrees c by : D. R. Mccracken
Download or read book Fission product release from high burnup fuel during oxidation in air at 950 degrees c written by D. R. Mccracken and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two mechanistically different regimes have been observed during the oxidation of uo2 in air: at temperatures greater than or equal to 800 degrees c, u3o8 forms large crystals which propagate in a front through the underlying u4o9/uo2; at temperatures less than 700 degrees c, one grain of uo2 ultimately gives one or more grains of u3o8. previous experiments (1) indicated that in this latter temperature zone, releases of fission products are low and probably originate from inventory at grain boundaries. the experiments described here at 950 degrees c using high burnup fuel (445, 465 mw.h/kg u) confirm earlier results obtained with low burnup fuel (2) at 920 degrees c: in this temperature zone, 100 percent of the volatile fission products are released when u3o8 is formed by oxidation of uo2 in air. within experimental error, oxidation rates and corresponding release rates are independent of burnup, so that data on oxidation rates obtained using unirradiated pellets can be used to estimate release rates of fission products during oxidation of irradiated fuel. iodine, in the form of i2, is released from the uranium matrix as readily as the noble gases, but subsequently adsorbs in steel pipework thus reducing its volatility in a real system. cs release was also observed. it lagged behind the iodine, ruling out csi as the volatile species.
Book Synopsis Experiment on Continuous Release of Fission Gas During Irradiation by : R. M. Carroll
Download or read book Experiment on Continuous Release of Fission Gas During Irradiation written by R. M. Carroll and published by . This book was released on 1961 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of High Temperature Reactor Fuel Element Materials by : Bertram Minushkin
Download or read book Evaluation of High Temperature Reactor Fuel Element Materials written by Bertram Minushkin and published by . This book was released on 1956 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Release of Fission Products from Lightly-irradiated UO2+x by : Mehrdad Ali Mansouri
Download or read book Release of Fission Products from Lightly-irradiated UO2+x written by Mehrdad Ali Mansouri and published by . This book was released on 1995 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Release of Volatile Fission Products from Irradiated Nuclear Fuel by :
Download or read book Thermal Release of Volatile Fission Products from Irradiated Nuclear Fuel written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An effective procedure for removing 3H, Xe and Kr from irradiated fuels was demonstrated using Shippingport UO2 fuel. The release characteristics of 3H, Kr, Xe, and I from irradiated nuclear fuel have been determined as a function of temperature and gaseous environment. Vacuum outgassing and a flowing gas stream have been used to vary the gaseous environment. Vacuum outgassing released about 99% of the 3H and 20% of both Kr and Xe within a 3 h at 1500°C. Similar results were obtained using a carrier gas of He containing 6% H2. However, a carrier gas containing only He resulted in the release of approximately 80% of the 3H and 99% of both Kr and Xe. These results indicate that the release of these volatile fission products from irradiated nuclear fuel is a function of the chemical composition of the gaseous environment. The rate of tritium release increased with increasing temperature (1100 to 1500°C) and with the addition of hydrogen to the gas stream. Using crushed UO2 fuel without cladding and He as the carrier gas, Kr was completely released at 1500°C in 2.5 h. Below 1350°C, no Kr-Xe release was observed. Approximately 86% of the 129I and 95% of the cesium was released from a piece (3.9 g) of UO2 fuel at 1500°C in He. The zirconium cladding was observed to fracture during heat treatment. A large-scale thermal outgassing system was conceptually designed by the General Atomic Company from an engineering analysis of available experimental data. The direct cost of a 0.5 metric/ton day thermal outgassing system is estimated to be $1,926,000 (1982 dollars), including equipment, installation, instrumentation and controls, piping, and services. The thermal outgassing process was determined to be a technically feasible and cost-competitive process to remove tritium in the head-end portion of a LWR fuel reprocessing plant. Additional laboratory-scale development has been recommended.
Download or read book Nuclear Safety written by and published by . This book was released on 1991 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fission Product Release from Highly Irradiated LWR Fuel by :
Download or read book Fission Product Release from Highly Irradiated LWR Fuel written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of experiments was conducted with highly irradiated light-water reactor fuel rod segments to investigate fission products released in steam in the temperature range 500 to 1200°C. (Two additional release tests were conducted in dry air.) The primary objectives were to quantify and characterize fission product release under conditions postulated for a spent-fuel transportation accident and for a successfully terminated loss-of-coolant accident (LOCA). In simulated, controlled LOCA-type tests, release at the time of rupture proved to be more significant than the diffusional release that followed. Comparison of the release data for the dry-air tests with the release data of similarly conducted tests in steam indicated significant increases in the releases of iodine, ruthenium, and cesium in air. Various parameters that affect fission product release are discussed, and experimental observations and analysis of the chemical behavior of releasable fission products in inert, steam, and dry-air atmospheres are examined.
Book Synopsis Fission Product Release from Uranium Heated in Air by : R. K. Hilliard
Download or read book Fission Product Release from Uranium Heated in Air written by R. K. Hilliard and published by . This book was released on 1959 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fission-Gas-Release from UO$sub 2$, Interim Report by :
Download or read book Fission-Gas-Release from UO$sub 2$, Interim Report written by and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of fission products from UO/sub 2/ during irradiation at high temperatures is of primary interest to the Gas-cooled Reactor Project. Fuel tests consisting of UO/sub 2/ pellets encapsulated in Inconel or stainless steel were irradiated in the LITR, ORR, and ETR. The capsules were pierced in hot cells, and the gases collected in evacuated systems. Fractions of this gas, of suitable activity for counting, were taken and then analyzed by gamma spectrometry. Larger fractions of gas were analyzed by mass spectrometry. Percentage of gas release varied widely, increasing with temperature, impurity content, oxygen-to-uranium ratio of the UO/sub 2/, and decreasing with bulk density. For high density, stoichiometric UO/sub 2/, the gas release was generally less than 3% up to a temperature of about 2800 deg F, about which it was greatly accelerated. Fuel burn-ups of up to 22,000 Mwd/MT were obtained. Maximum measured central fuel temperatures of 3150 deg F were reached. The lower- density nonstoichiometric UO/sub 2/ released greater amounts of fission gas, particularly Kr/sup 85/. (auth).
Book Synopsis Proceedings of the Embedded Topical Meeting on DOE Spent Nuclear Fuel and Fissile Material Management, San Diego, California, June 4-8, 2000 by :
Download or read book Proceedings of the Embedded Topical Meeting on DOE Spent Nuclear Fuel and Fissile Material Management, San Diego, California, June 4-8, 2000 written by and published by . This book was released on 2000 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fission Product Release and Transport in Liquid Metal Fast Breeder Reactors by : G. W. Keilholtz
Download or read book Fission Product Release and Transport in Liquid Metal Fast Breeder Reactors written by G. W. Keilholtz and published by . This book was released on 1969 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1995 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fission Product Release by the High Temperature Uranium-steam Reaction by : A. J. Scott
Download or read book Fission Product Release by the High Temperature Uranium-steam Reaction written by A. J. Scott and published by . This book was released on 1959 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
