Graphite burnout, interim report on IP-25-A (PT-105-532-E)

Thumbnail image of item number 1 in: 'Graphite burnout, interim report on IP-25-A (PT-105-532-E)'.
Thumbnail image of item number 2 in: 'Graphite burnout, interim report on IP-25-A (PT-105-532-E)'.
Thumbnail image of item number 3 in: 'Graphite burnout, interim report on IP-25-A (PT-105-532-E)'.
Thumbnail image of item number 4 in: 'Graphite burnout, interim report on IP-25-A (PT-105-532-E)'.
Showing 1-4 of 52 pages in this report.

PDF Version Also Available for Download.

Description

Graphite reacts with such gases as CO{sub 2}, O{sub 2}, or water vapor to form gaseous oxides of carbon. In the case of CO{sub 2}-graphite interaction, the reaction rate is not significant until about 550 C. Water oxidizes graphite, very roughly, three times faster than CO{sub 2}. Air will oxidize graphite appreciably at temperatures below 500 C. Graphite removal from Hanford reactors is very important, since graphite is used both as a structural support and a moderator for neutrons. Griggs has shown that small graphite samples oxidized to 10 per cent weight loss had only about one-half their original compression ... continued below

Physical Description

49 p.

Creation Information

Ryan, B.A. & Halas, D.R. de March 15, 1960.

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.

Authors

Sponsor

Publisher

  • Hanford Atomic Products Operation
    Publisher Info: General Electric Co., Richland, WA (United States). Hanford Atomic Products Operation
    Place of Publication: Richland, Washington

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.

About | Browse this Partner

Contact Us

Corrections Questions

What

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

Description

Graphite reacts with such gases as CO{sub 2}, O{sub 2}, or water vapor to form gaseous oxides of carbon. In the case of CO{sub 2}-graphite interaction, the reaction rate is not significant until about 550 C. Water oxidizes graphite, very roughly, three times faster than CO{sub 2}. Air will oxidize graphite appreciably at temperatures below 500 C. Graphite removal from Hanford reactors is very important, since graphite is used both as a structural support and a moderator for neutrons. Griggs has shown that small graphite samples oxidized to 10 per cent weight loss had only about one-half their original compression strength. Hence, the longevity of the reactors depends to a great extent on maintaining a low graphite oxidation rate. A means of monitoring the extent of graphite loss, i. e., the burnout rate, is necessary to establish future reactor operational standards. Presently, weighed samples of reactor grade graphite are placed along the length of an empty process channel in each reactor. Thus, a sample is exposed to the reactor`s ambient conditions of power level, moderator temperature, and gas composition. This program was initiated in the vicinity of June, 1953 by Woodley. This report presents data on graphite burnout obtained from in-reactor experiments authorized under IP-25-A (PT-105-532-E) from August, 1957 to January, 1960. Burnout rates are obtained by a direct measurement of the weight loss of control graphite samples exposed to the reactor atmosphere.

Physical Description

49 p.

Notes

OSTI as DE95009507

Source

  • Other Information: PBD: 15 Mar 1960

Language

Item Type

Identifier

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

  • Other: DE95009507
  • Report No.: HW--62273-Rev.2
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/42525 | External Link
  • Office of Scientific & Technical Information Report Number: 42525
  • Archival Resource Key: ark:/67531/metadc679039

Collections

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

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this report?

Digital Files

When

Dates and time periods associated with this report.

Creation Date

  • March 15, 1960

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

Description Last Updated

  • Feb. 20, 2017, 4:30 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 7
More Statistics

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Graphite burnout, interim report on IP-25-A (PT-105-532-E)'.
Thumbnail image of item number 2 in: 'Graphite burnout, interim report on IP-25-A (PT-105-532-E)'.
Thumbnail image of item number 3 in: 'Graphite burnout, interim report on IP-25-A (PT-105-532-E)'.
Thumbnail image of item number 4 in: 'Graphite burnout, interim report on IP-25-A (PT-105-532-E)'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Ryan, B.A. & Halas, D.R. de. Graphite burnout, interim report on IP-25-A (PT-105-532-E), report, March 15, 1960; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc679039/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.