``Maximal credible accident`` simulation studies at the storage ring of the APS

PDF Version Also Available for Download.

Description

This study was aimed at determining the adequacy of the storage ring bulk shielding for reducing the radiation hazard outside of secured areas, due to errant particle beam losses. The hazard class (Low, Medium or High) of an accelerator is determined by the onsite and offsite effective dose equivalent under the assumption of a maximal credible accident occurring. The credible maximal accident condition is that which produces at the weakest part of the shielding at full power the greatest amount of radiation at the subject position outside the secured area during one hour. For the hazard class to be Low, ... continued below

Physical Description

9 p.

Creation Information

Decker, G.; Justus, A.L.; Job, P.K.; Moe, H.J.; Vacca, J.H. & Veluri, V.R. September 1, 1997.

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.

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

Description

This study was aimed at determining the adequacy of the storage ring bulk shielding for reducing the radiation hazard outside of secured areas, due to errant particle beam losses. The hazard class (Low, Medium or High) of an accelerator is determined by the onsite and offsite effective dose equivalent under the assumption of a maximal credible accident occurring. The credible maximal accident condition is that which produces at the weakest part of the shielding at full power the greatest amount of radiation at the subject position outside the secured area during one hour. For the hazard class to be Low, the onsite radiation level must be between 1 and 25 rem in the one hour duration of the maximal credible accident. The safety envelope defines the bounding conditions for the safe operation of a DOE accelerator facility. The measured dose rate results at each location showed wide variations, which tends to indicate that the missteered beam may not have hit at the same point for each repeat of a given loss scenario. However, all measured results were comfortably below the calculated values. It appears the use of semi-empirical calculational methods are generally quite conservative, which is desirable for perceived beam loss accidents at the safety envelope. With respect to the disagreement between the calculated dose rates and the measured values for the maximal credible accident, the authors suspect that the actual showering which takes place is more distributed along the beamline than the 4-m-long beam spill assumed in the calculations. Since the distribution is not known this adds further to the difficulty in correlating the measured results with the calculated values. In all controlled loss studies, it appears that the measured results were obtained for showers that may not have been fully developed.

Physical Description

9 p.

Notes

INIS; OSTI as DE98000740

Source

  • Other Information: PBD: Sep 1997

Language

Item Type

Identifier

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

  • Other: DE98000740
  • Report No.: LS--262(ANL)
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/541921 | External Link
  • Office of Scientific & Technical Information Report Number: 541921
  • Archival Resource Key: ark:/67531/metadc692659

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.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • September 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

Description Last Updated

  • Dec. 16, 2015, 5:32 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 2

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

Decker, G.; Justus, A.L.; Job, P.K.; Moe, H.J.; Vacca, J.H. & Veluri, V.R. ``Maximal credible accident`` simulation studies at the storage ring of the APS, report, September 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc692659/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.