Estimation of package temperatures during hypothetical accident thermal test conditions

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Knowledge of package maximum temperatures during normal transport and hypothetical accident thermal test conditions is required to ensure that a package for the transportation of radioactive materials is designed adequately to meet the requirements specified in the Code of Federal Regulations. The testing procedure for the hypothetical accident thermal event is to expose the whole package to a radiation environment of 800{degrees}C (1475{degrees}F) for a period of 30 minutes, with the ambient temperature before and after the 30-min test held constant at 38{degrees}C (100{degrees}F). To determine the temperatures of a package during the hypothetical accident thermal event, the designers and ... continued below

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9 p.

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Shah, V.L. December 31, 1995.

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Knowledge of package maximum temperatures during normal transport and hypothetical accident thermal test conditions is required to ensure that a package for the transportation of radioactive materials is designed adequately to meet the requirements specified in the Code of Federal Regulations. The testing procedure for the hypothetical accident thermal event is to expose the whole package to a radiation environment of 800{degrees}C (1475{degrees}F) for a period of 30 minutes, with the ambient temperature before and after the 30-min test held constant at 38{degrees}C (100{degrees}F). To determine the temperatures of a package during the hypothetical accident thermal event, the designers and reviewers perform detailed analyses with computer codes. Because detailed modeling of the package and solving the thermal diffusion equation with computer codes require considerable time and effort, simple conservative estimating procedures are therefore preferred because the very detailed and time-consuming numerical computation can be avoided if the results of a simple conservative estimation can show that a package meets the requirements. The simple procedure presented in this paper provides quick and conservative estimation of package maximum temperatures, T{sub max}({times}), at a distance {times} from the surface, during hypothetical accident thermal test conditions. The analytical solutions for temperature in a semi-infinite solid and in an infinitely long circular cylinder, subjected to a step surface-temperature boundary condition, are applied to estimate the maximum temperature. The procedure is applicable to all packages, with or without an internal heat source, that have rectangular or cylindrical thermal insulating overpacks. Examples, mathematical proof, and qualitative arguments are presented to show that the proposed method is conservative and easy to use.

Physical Description

9 p.

Notes

INIS; OSTI as DE96007399

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  • PATRAM `95: 11. international conference on packaging and transportation of radioactive materials, Las Vegas, NV (United States), 3-8 Dec 1995

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  • Other: DE96007399
  • Report No.: ANL/ET/CP--86572
  • Report No.: CONF-951203--65
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 207475
  • Archival Resource Key: ark:/67531/metadc669676

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Office of Scientific & Technical Information Technical Reports

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  • December 31, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Dec. 14, 2015, 5:18 p.m.

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Shah, V.L. Estimation of package temperatures during hypothetical accident thermal test conditions, article, December 31, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc669676/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.