Download or read book In situ Tritium Recovery from Li Sub 2 O Irradiated in Fast Neutron Flux written by and published by . This book was released on 1991 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The BEATRIX-2 irradiation experiment is an in-situ tritium release experiment to evaluate the stability and tritium release characteristics of Li2O under fast neutron irradiation to extended burnups. A thin-annular ring specimen capable of temperature changes was irradiated in Phase 1 of the experiment to a lithium burnup of 4%. The primary emphasis of the test plan was to determine the effect and interrelationship of gas composition and temperature on the tritium recovery from Li2O. Temperature changes in the range from 500 to 650°C resulted in a decreasing tritium inventory with increasing temperature and series of specific temperature changes were carried out at intervals throughout the experiment to characterize the effect of burnup. Decreasing the amount of hydrogen in the sweep gas resulted in an increase in the tritium inventory in the Li2O specimen. The tritium recovery during startup and shutdown was observed to be strongly influenced by the composition of the sweep gas.
Download or read book In Situ Tritium Recovery from Li Sub 2 O Irradiated in Fast Neutron Flux written by and published by . This book was released on 1991 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The BEATRIX-II irradiation experiment is an in-situ tritium recovery experiment to evaluate the tritium release characteristics of Li2O and to characterize its stability under fast neutron irradiation to extended burnups. This is an IEA sponsored experiment which is being carried out in the Materials Open Test Assembly of FFTF. The participants are Japan, Canada and the US. The in-situ tritium recovery experiment includes two specimens: a thin annular specimen capable of temperature changes and a larger temperature-gradient specimen. Two other papers have been presented this week at ICFRM-5 which dealt with the results to date. At this workshop I will discuss the effects of gas composition changes that have been observed in BEATRIX-II, Phase 1 and the implications that these observations have on the operation of ion chambers.
Download or read book In situ Tritium Recovery from Li Sub 2 O Irradiated in Fast Neutron Flux written by and published by . This book was released on 1990 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The BEATRIX-II experiment in FFTF is an in-situ tritium recovery experiment to evaluate the tritium release characteristics of Li2O and its stability under fast neutron irradiation to extended burnups. This experiment includes two specimens: a thin annular specimen capable of temperature transients and a larger temperature gradient specimen. During the first 85 days of the operating cycle of the reactor, the tritium recovery rate of a temperature transient capsule was examined as a function of temperature, gas flow rate, gas composition and burnup. Temperature changes in the range from 525 to 625°C resulted in decreasing tritium inventory with increasing temperature. Lower gas flow rates resulted in slightly lower tritium release rates while gas composition changes affected the tritium release rate significantly, more than either flow rate or temperature changes. Three different sweep gases were used: He with 0.1% H2, He with 0.01% H2, and pure He. Decreasing the amount of hydrogen in the sweep gas decreased the steady-state release rate by as much as a factor of two. A temperature gradient capsule is more prototypic of the conditions expected in a fusion blanket and was designed to provide data that can be used in evaluating the operational parameters of a solid breeder in a blanket environment. The operation of this canister during the first 85 EFPD cycle suggests that Li2O is a viable solid breeder material. 9 refs., 5 figs., 3 tabs.
Download or read book BEATRIX II written by and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The BEATRIX-II irradiation experiment was an in situ, fast neutron, tritium release experiment to evaluate the performance of ceramic fusion solid breeders at extended burnups. The experiment consisted of two sequential irradiations: Phase I for 300 EFPD and Phase II for 200 EFPD that resulted in lithium burnups from 4[endash]6%. Thin-walled Li[sub 2]O ring specimens capable of temperature changes were irradiated in both Phase I and Phase II. Temperature changes were also used to determine the tritium inventory and to characterize the effect or irradiation history and sweep gas composition. Solid-cylindrical temperature-gradient specimens were irradiated to characterize their stability with respect to heat transport, lithium transport and physical integrity over the duration of the experiment. Phase I included a solid monolithic specimen of Li[sub 2]O while Phase II included a sphere bed of Li[sub 2]ZrO[sub 3].
Download or read book In Situ Tritium from Li sub 2 O and Li sub 2 ZrO sub 3 Irradiated in a Fast Neutron Flux written by and published by . This book was released on 1994 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: BEATRIX-II was an in situ tritium recovery experiment. This in situ tritium recovery experiment provided data on the performance of Li2O and Li2ZrO3 under irradiation conditions covering a range of sweep gas compositions and temperatures. The experiment consisted of two separate irradiation cycles which in turn included two vented tritium recovery canisters each. Phase 1 operated for 300 Effective Full Power Days (EFPD) while Phase 2 operated for 203 EFPD of irradiation. The tritium recovery behavior of Li2O and Li2ZrO3 was characterized using temperature transients, sweep gas composition changes and reactor power changes to effect changes in the tritium inventory. The high neutron flux level in FFTF resulted in high tritium generation rates which combined with a responsive tritium measurement system allowed detailed observations on the tritium recovery behavior of Li2O and Li2ZrO3. During the course of the experiment a number of observations were made which did not appear consistent with a simplified view of the tritium recovery behavior of these materials. These observations included small negative tritium recovery peaks preceding the typical primary positive peaks; and, for specific temperature ranges, changes in tritium inventory which where opposite to the characteristic expected changes.
Download or read book In situ Tritium Recovery from Li2O Irradiated in Fast Neutron Flux written by and published by . This book was released on 1991 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: The BEATRIX-2 irradiation experiment is an in-situ tritium release experiment to evaluate the stability and tritium release characteristics of Li2O under fast neutron irradiation to extended burnups. A thin-annular ring specimen capable of temperature changes was irradiated in Phase 1 of the experiment to a lithium burnup of 4%. The primary emphasis of the test plan was to determine the effect and interrelationship of gas composition and temperature on the tritium recovery from Li2O. Temperature changes in the range from 500 to 650°C resulted in a decreasing tritium inventory with increasing temperature and series of specific temperature changes were carried out at intervals throughout the experiment to characterize the effect of burnup. Decreasing the amount of hydrogen in the sweep gas resulted in an increase in the tritium inventory in the Li2O specimen. The tritium recovery during startup and shutdown was observed to be strongly influenced by the composition of the sweep gas.
Download or read book In Situ Tritium Recovery from Li2O Irradiated in a Fast Neutron Flux written by and published by . This book was released on 1994 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: BEATRIX-II, Phase II was an in situ tritium recovery experiment designed to characterize the behavior of lithium ceramics irradiated to high burnup in a fast neutron flux. A thin-walled Li2O ring specimen was irradiated at temperatures in the range from 520 to 640 C in helium sweep gases containing 0, 0.01 and 0.1% H2 to a 5% lithium burnup. The tritium recovery behavior of Li2O was characterized by using temperature transients and sweep gas composition changes to effect changes in the tritium inventory.
Download or read book BEATRIX II written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An in situ tritium recovery experiment is being fabricated for the irradiation of Li/sub 2/O in the Fast Flux Test Facility located at the Hanford Site, Richland, Washington, United States of America. Two in situ tritium recovery canisters will be irradiated with lithium atom burnups to 4%. One canister will provide fundamental data on tritium release as a function of temperature, gas composition, and flow rate. The other canister will provide integrated performance data from solid pellet specimens with large (450/degree/C) radial temperature gradients. 10 refs., 5 figs., 1 tab.
Download or read book In Situ Tritium from Li2O and Li2ZrO3 Irradiated in a Fast Neutron Flux written by and published by . This book was released on 1994 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: BEATRIX-II was an in situ tritium recovery experiment. This in situ tritium recovery experiment provided data on the performance of Li2O and Li2ZrO3 under irradiation conditions covering a range of sweep gas compositions and temperatures. The experiment consisted of two separate irradiation cycles which in turn included two vented tritium recovery canisters each. Phase 1 operated for 300 Effective Full Power Days (EFPD) while Phase 2 operated for 203 EFPD of irradiation. The tritium recovery behavior of Li2O and Li2ZrO3 was characterized using temperature transients, sweep gas composition changes and reactor power changes to effect changes in the tritium inventory. The high neutron flux level in FFTF resulted in high tritium generation rates which combined with a responsive tritium measurement system allowed detailed observations on the tritium recovery behavior of Li2O and Li2ZrO3. During the course of the experiment a number of observations were made which did not appear consistent with a simplified view of the tritium recovery behavior of these materials. These observations included small negative tritium recovery peaks preceding the typical primary positive peaks; and, for specific temperature ranges, changes in tritium inventory which where opposite to the characteristic expected changes.
Download or read book In Situ Tritium Recovery from Li2O Irradiated in Fast Neutron Flux written by and published by . This book was released on 1991 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The BEATRIX-II irradiation experiment is an in-situ tritium recovery experiment to evaluate the tritium release characteristics of Li2O and to characterize its stability under fast neutron irradiation to extended burnups. This is an IEA sponsored experiment which is being carried out in the Materials Open Test Assembly of FFTF. The participants are Japan, Canada and the US. The in-situ tritium recovery experiment includes two specimens: a thin annular specimen capable of temperature changes and a larger temperature-gradient specimen. Two other papers have been presented this week at ICFRM-5 which dealt with the results to date. At this workshop I will discuss the effects of gas composition changes that have been observed in BEATRIX-II, Phase 1 and the implications that these observations have on the operation of ion chambers.
Download or read book In situ tritium recovery from li2o irradiated in fast neutron flux beatrix ii temperature change specimen written by O. D. Slagle and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Sweep Gas Composition on Ionization Chamber Response in the BEATRIX II Tritium Recovery Experiment written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The BEATRIX-II irradiation experiment was an in situ tritium recovery experiment to evaluate the tritium release characteristics of fusion ceramic breeder materials and to characterize their stability under fast neutron irradiation to extended burnups. This is an International Energy Agency (IEA) sponsored experiment which is being carried out in the Materials Open Test Assembly of Fast Flux Test Facility (FFTF). The participants are Japan, Canada and the US The in situ tritium recovery experiment consisted of two individual in-reactor experimental assemblies (Phase I and Phase II) that were irradiated for 300 and 200 EFPD, respectively. Each experimental phase included two specimens: a thin annular specimen capable of temperature changes and a larger temperature-gradient specimen. In Phase I both specimens were Li[sub 2]O while for Phase II the temperature-change specimen consisted of Li[sub 2]O and the temperature-gradient specimen was a Li[sub 2]ZrO[sub 3] spherebed. Real-time measurements of the tritium release from the specimens during changing conditions (neutronics, temperature and sweep gas composition) were made using ion chambers. In order to correctly interpret the response of the ionization chambers it is necessary to understand the effect of changing sweep gas composition on the operation of the chambers. The purpose of this paper is to describe activities carried out to determine the effect of hydrogen additions to a helium sweep gas on the operation of these ionization chambers.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book Aspects of Tritium Release from Neutron irradiated Lithium Oxide written by Kevin Richard O'Kula and published by . This book was released on 1984 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1844 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 1977 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
