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  • 1
    facet.materialart.
    Unknown
    Fine particulate capture device (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: To capture fine particulate matter in a gas such as air, a dielectric fluid is directed to the center of whichever face of a rotating disc is exposed to the air flow. The disc is comprised of two or more segments which bear opposite electrostatic potentials. As the dielectric fluid is centrifuged towards the periphery of the rotating disc, the fluid becomes charged to the same potential as the segment over which it is passing. Particulate matter is attracted to the charged segment and is captured by the fluid. The fluid then carries the captured particulate matter to a collection device such as a toroidal container disposed around the periphery of the disc. A grounded electrically-conductive ring may be disposed at the outer periphery of the disc to neutralize the captured particles and the fluid before they enter the container.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Evacuation areas for transportation accidents involving propellant tank pressure bursts (1972)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Evacuation areas are defined for those transportation accidents where volatile chemical propellant tanks are exposed to fire in the wreckage and eventually explode with consequent risks from fragments in surrounding populated areas. An evacuation area with a minimum radius of 600 m (2000 ft) is recommended to limit the statistical probability of fatality to one in 100 such accidents. The result was made possible by the derivation of a distribution function of distances reached by fragments from bursting chemical car tanks. Data concerning fragments was obtained from reports or tank car pressure bursts between 1958 and 1971.
    Keywords: GENERAL
    Type: NASA-TM-X-68277 , E-7597 , JANNAF Propulsion Meeting; Nov 27, 1972 - Nov 29, 1972; New Orleans; United States
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    A method for defining down-wind evacuation areas for transportation accidents involving toxic propellant spills (1972)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Evacuation areas for accidental spills of toxic propellants along rail and highway shipping routes are defined to help local authorities reduce risks to people from excessive vapor concentrations. These criteria along with other emergency information are shown in propellant spill cards. The evacuation areas are based on current best estimates of propellant evaporation rates from various areas of spill puddles. These rates are used together with a continuous point-source, bi-normal model of plume dispersion. The rate at which the toxic plume disperses is based on a neutral atmospheric condition. This condition, which results in slow plume dispersion, represents the widest range of weather parameters which could occur during the day and nighttime periods. Evacuation areas are defined by the ground level boundaries of the plume within which the concentrations exceed the toxic Threshold Limit Value (TLV) or in some cases the Emergency Exposure Limit (EEL).
    Keywords: BIOTECHNOLOGY
    Type: NASA-TM-X-68188 , E-7320 , 1972 joint Army Navy NASA AF (JANNAF) Prop. Meeting; Nov 27, 1972 - Nov 29, 1972; New Orleans, LA; United States
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Evacuation areas for transportation accidents involving propellant tank pressure bursts (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Evacuation areas are defined for those transportation accidents where volatile chemical propellant tanks are exposed to fire in the wreckage and eventually explode with consequent risks from fragments in surrounding populated areas. An evacuation area with a minimum radius of 600 m is recommended to limit the statistical probability of fatality to one in 100 such accidents. The result of this study was made possible by the derivation of a distribution function of distances reached by fragments from bursting chemical car tanks. Data concerning fragments were obtained from reports of tank car pressure bursts between 1958 and 1971.
    Keywords: FACILITIES, RESEARCH, AND SUPPORT
    Type: JANNAF Propulsion Meeting; Nov 27, 1972 - Nov 29, 1972; New Orleans, LA
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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