Author: M. D. KarkhanavalaPublisher:
ISBN:
Category : Electric resistance
Languages : en
Pages : 20
Book Description
In-pile Measurement of the Electrical Resistivity and Thermoelectric Power of Sintered UO2
Author: M. D. KarkhanavalaPublisher:
ISBN:
Category : Electric resistance
Languages : en
Pages : 20
Book Description
IN-PILE MEASUREMENT OF THE ELECTRICAL RESISTIVITY AND THERMOELECTRIC POWER OF SINTERED UO$sub 2$
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Two thin plates of high-density UO/sub 2/ were sandwiched together with thermocouples between them and pressed against the outer surfaces. The thermocouples were used as electrodes and the electrical resistivity of the UO/sub 2/ measured by the potential drop method using corresponding arms of the thermocouples as current lead-in wires and potential probes. The UO/sub 2/ was heated by its own fission heat and the electrical resistivity measured at temperatures from 50 to 972 deg C. Preirradiation measurements were made using an electric furnace to obtain temperatures to 750 deg C. Electrical resistivity did not change with irradiation up to about 10/sup 1//sup 8/ nvt, at which point the resistivity decreased by a factor of 3. The resistivity ranged from 8.75 x 10/sup 3/ ohm-cm at room temperature (before irradiation) to 0.4 ohm-cm at 773 deg C (after nvt> 10/sup 1//sup 8/). The activation energy was 0.5 ev during irradiation as compared with 0.65 ev before irradiation. The temperature between the plates was higher than the outside temperature during irradiation. This thermal gradient created a thermoelectric emf between the UO/sub 2/ and the platinum thermocouples. The thermoelectric emf for the Pt-UO/sub 2/-Pt system ranged from 130 mu v/ deg C at 162 deg C to 29 mu v/ deg C at 900 deg C. The UO/sub 2/ behaved lixe an n-type conductor during irradiation. (auth).
Measurement of the Thermal Conductivity of Metal-clad Uranium Oxide Rods During Irradiation
Author: I. CohenReactor Materials
Author: Reactor Core Materials
Author: The Effect of Nuclear Radiation on Ceramic Reactor-fuel Materials
Author: James B. MelehanPublisher:
ISBN:
Category : Ceramics
Languages : en
Pages : 84
Book Description
This report presents state-of-the art information on the effects of nuclear radiation on ceramic reactor fuel materials that are being used or being considered for use in various types of reactors. The materials discussed include uranium oxides, uranium carbides, uranium mononitride, uranium silicides, plutonium oxide, and plutonium carbide. The report presents data in the form of tables and curves for physical damage incurred by the fuel materials as a result of their exposure to nuclear radiation.
Conference on Light-Water-Moderated Research Reactors
Author: Publisher:
ISBN:
Category : Light water reactors
Languages : en
Pages : 446
Book Description
An In-pile Measurement of the Effective Thermal Conductivity of UO2
Author: John D. EichenbergPublisher:
ISBN:
Category : Uranium oxides
Languages : en
Pages : 20
Book Description
Nuclear Science Abstracts
Author: Solid State Division Annual Progress Report for Period Ending ...
Author: Oak Ridge National Laboratory. Solid State DivisionPublisher:
ISBN:
Category :
Languages : en
Pages : 172
Book Description