Criticality safety analyses of the early (unreflected) ``Jemima`` and the (reflected) ``Big Ten`` experiments: Calculated effects of fuel homogenization on reactivity

PDF Version Also Available for Download.

Description

The early ``Jemima`` experiments (1952--1954) have been evaluated as criticality safety benchmarks. The ongoing ``Big Ten`` experiment (1971--present) is under consideration as a benchmark. These two experiments differ enormously in their overall sizes and in the absence (or presence) of an external reflector. However, they share a common characteristic: the entire core, or the majority of it, is comprised of thin, alternating layers of highly enriched uranium and natural uranium, in order to simulate fuel of uniform composition and intermediate enrichment Reference MCNP models for the experiments retain the heterogeneous compositions and include considerable structural detail. For comparison, homogenized models, ... continued below

Physical Description

7 p.

Creation Information

Krohn, B.J. September 1, 1995.

Context

This article 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 article can be viewed below.

Who

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

Author

  • Krohn, B.J. Los Alamos National Lab., NM (United States). Technology and Safety Assessment Div.

Sponsor

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 article. Follow the links below to find similar items on the Digital Library.

Description

The early ``Jemima`` experiments (1952--1954) have been evaluated as criticality safety benchmarks. The ongoing ``Big Ten`` experiment (1971--present) is under consideration as a benchmark. These two experiments differ enormously in their overall sizes and in the absence (or presence) of an external reflector. However, they share a common characteristic: the entire core, or the majority of it, is comprised of thin, alternating layers of highly enriched uranium and natural uranium, in order to simulate fuel of uniform composition and intermediate enrichment Reference MCNP models for the experiments retain the heterogeneous compositions and include considerable structural detail. For comparison, homogenized models, which preserve overall volumes and the total mass of each isotopic species, have also been tested. Results indicate that (1) heterogeneous assemblies and their equivalent homogeneous assemblies differ significantly in k{sub eff}, and that (2) these differences occur both in the absence and in the presence of a thick external reflector composed of depleted uranium.

Physical Description

7 p.

Notes

INIS; OSTI as DE95016834

Source

  • 5. international conference on nuclear criticality safety, Albuquerque, NM (United States), 17-22 Sep 1995

Language

Item Type

Identifier

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

  • Other: DE95016834
  • Report No.: LA-UR--95-2244
  • Report No.: CONF-9509100--9
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 102216
  • Archival Resource Key: ark:/67531/metadc619421

Collections

This article 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.

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • September 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

Description Last Updated

  • Feb. 25, 2016, 2:23 p.m.

Usage Statistics

When was this article last used?

Yesterday: 0
Past 30 days: 1
Total Uses: 7

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Krohn, B.J. Criticality safety analyses of the early (unreflected) ``Jemima`` and the (reflected) ``Big Ten`` experiments: Calculated effects of fuel homogenization on reactivity, article, September 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc619421/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.