Regulatory concerns for leakage testing of packagings with three O-ring closure seals

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The American National Standard for Radioactive Materials--Leakage Tests on Packages for Shipment (ANSI N14.5) provides guidance for leakage rate testing to show that a particular packaging complies with regulatory requirements and also provides guidance in determining appropriate acceptance criteria. Recent radioactive packagings designs have incorporated three O-ring closure seals, the middle O-ring being the containment seal. These designs have the potential for false positive results of leakage rate tests. The volume between the containment O-ring and the inner O-ring is used for the helium gas required for the leakage rate tests to reduce both the amount of helium used and ... continued below

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5 p.

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Oras, J.J.; Towell, R.H. & Wangler, M.E. September 1, 1997.

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  • Oras, J.J. Argonne National Lab., IL (United States)
  • Towell, R.H. Eagle Research Group, Inc., Germantown, MD (United States)
  • Wangler, M.E. Dept. of Energy, Germantown, MD (United States)

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Description

The American National Standard for Radioactive Materials--Leakage Tests on Packages for Shipment (ANSI N14.5) provides guidance for leakage rate testing to show that a particular packaging complies with regulatory requirements and also provides guidance in determining appropriate acceptance criteria. Recent radioactive packagings designs have incorporated three O-ring closure seals, the middle O-ring being the containment seal. These designs have the potential for false positive results of leakage rate tests. The volume between the containment O-ring and the inner O-ring is used for the helium gas required for the leakage rate tests to reduce both the amount of helium used and the time required to conduct the tests. A leak detector samples the evacuated volume between the outer O-ring and the containment O-ring. False positive results can be caused in two ways, a large leakage in the containment seal or leakage in the inner seal. This paper will describe the problem together with possible solutions/areas that need to be addressed in a Safety Analysis Report for Packagings before a particular packaging design can be certified for transport.

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5 p.

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INIS; OSTI as DE97053876

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  • 38. annual meeting of the Institute of Nuclear Materials management, Phoenix, AZ (United States), 20-24 Jul 1997

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  • Other: DE97053876
  • Report No.: ANL/ET/CP--92453
  • Report No.: CONF-970744--
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 555348
  • Archival Resource Key: ark:/67531/metadc691501

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Office of Scientific & Technical Information Technical Reports

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

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Creation Date

  • September 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • June 13, 2016, 8:44 p.m.

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Oras, J.J.; Towell, R.H. & Wangler, M.E. Regulatory concerns for leakage testing of packagings with three O-ring closure seals, article, September 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc691501/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.