Accession Number : ADA288570

Title :   Theoretical Assessment of a Non-Destructive Ethane Gas Test for Production Control of Military Canisters.

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Narayan, Shankar B. ; Harrison, Brian H.

PDF Url : ADA288570

Report Date : JAN 1994

Pagination or Media Count : 87

Abstract : A non-destructive vapor test, involving an ethane pulse challenge, that measures the integrity of the activated carbon bed in military canisters is presently under development at the Defence Research Establishment Ottawa. The effectiveness of the test has been theoretically assessed in this report by modelling the effect of the presence of defects in the carbon bed on its performance. The model has been modified to successfully predict the adsorption behavior of a dry ethane pulse- or a dry n-octane step-challenge on uneven, non-uniform or short beds. It has been found that the behavior for the non-uniform beds is different from uneven beds and that care must be taken in selecting the breakthrough concentration for the ethane test. Whilst the sensitivity of the ethane pulse test to identify the defects is not as good as the n- octane step test, the time required for the ethane test is much shorter. It has been shown that this reduced sensitivity is more than compensated for by the ability to test 100% of the canisters with the ethane pulse challenge test.

Descriptors :   *NONDESTRUCTIVE TESTING, *GASES, *PRODUCTION CONTROL, *CANISTERS, *ETHANES, TEST AND EVALUATION, VAPORS, ADSORPTION, CANADA, CARBON, SENSITIVITY, MOISTURE CONTENT, REDUCTION, ACTIVATED CARBON, PULSES, LOW LEVEL, MILITARY APPLICATIONS.

Subject Categories : Protective Equipment
      Inorganic Chemistry
      Organic Chemistry
      Logistics, Military Facilities and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE