MODEL 9975 LIFE EXTENSION PACKAGE 2 FINAL REPORT

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Life extension package LE2 (9975-04162) was instrumented and subjected to an extreme temperature environment for 81 weeks. During this time, the maximum fiberboard temperature was {approx}240 - 250 degrees F, and was established by a combination of internal heat (19 watts) and external heat. This temperature matches the fiberboard continuous service rating, although such extremes are not expected for normal operation in KAMS. Several tests and parameters were used to characterize the package components. Results from these tests generally indicate agreement between this full-scale shipping package and small-scale laboratory tests on fiberboard and O-ring samples. These areas of agreement include ... continued below

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Daugherty, W. April 27, 2010.

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Description

Life extension package LE2 (9975-04162) was instrumented and subjected to an extreme temperature environment for 81 weeks. During this time, the maximum fiberboard temperature was {approx}240 - 250 degrees F, and was established by a combination of internal heat (19 watts) and external heat. This temperature matches the fiberboard continuous service rating, although such extremes are not expected for normal operation in KAMS. Several tests and parameters were used to characterize the package components. Results from these tests generally indicate agreement between this full-scale shipping package and small-scale laboratory tests on fiberboard and O-ring samples. These areas of agreement include the rate of fiberboard weight loss, change in fiberboard thermal conductivity, fiberboard compression strength, and O-ring compression set. In addition, this package provides an example of the extent to which moisture within the fiberboard can redistribute in the presence of a temperature gradient such as might be created by a 19 watt internal heat load. Moisture re distribution in this package was further exaggerated by a majority of the fiberboard being heated to above the boiling point of water. The majority of water within the fiberboard migrated to the bottom layers of fiberboard, where it contributed to accelerated degradation beyond that expected based solely on the temperature.

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  • Report No.: SRNL-STI-2010-00185
  • Grant Number: DE-AC09-08SR22470
  • DOI: 10.2172/979689 | External Link
  • Office of Scientific & Technical Information Report Number: 979689
  • Archival Resource Key: ark:/67531/metadc925732

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  • April 27, 2010

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 12:24 p.m.

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Daugherty, W. MODEL 9975 LIFE EXTENSION PACKAGE 2 FINAL REPORT, report, April 27, 2010; South Carolina. (digital.library.unt.edu/ark:/67531/metadc925732/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.