IN-PILE MEASUREMENT OF THE ELECTRICAL RESISTIVITY AND THERMOELECTRIC POWER OF SINTERED UO$sub 2$

PDF Version Also Available for Download.

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 ... continued below

Physical Description

Pages: 12

Creation Information

Karkhanavala, M.D. & Carroll, R.M. May 1, 1961.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

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)

Physical Description

Pages: 12

Source

  • Other Information: Orig. Receipt Date: 31-DEC-61

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: ORNL-3093
  • Grant Number: W-7405-ENG-26
  • DOI: 10.2172/4009319 | External Link
  • Office of Scientific & Technical Information Report Number: 4009319
  • Archival Resource Key: ark:/67531/metadc867885

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • May 1, 1961

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

Description Last Updated

  • Nov. 3, 2016, 6:28 p.m.

Usage Statistics

When was this report last used?

Congratulations! It looks like you are the first person to view this item online.

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Karkhanavala, M.D. & Carroll, R.M. IN-PILE MEASUREMENT OF THE ELECTRICAL RESISTIVITY AND THERMOELECTRIC POWER OF SINTERED UO$sub 2$, report, May 1, 1961; Tennessee. (digital.library.unt.edu/ark:/67531/metadc867885/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.