RADIATION SCAVENGING OF ACETYLENE DISSOLVED IN LIQUID OXYGEN, PART 1. IN-PLACE CLEANING OF PIPING SYSTEMS, PART 2.
LITTLE (ARTHUR D) INC CAMBRIDGE MASS
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Destroying acetylene dissolved in liquid oxygen by irradiation with gamma rays was investigated. It was found that 94-98 of the acetylene in a saturated solution of acetylene in oxygen was removed in 8 hours at a dose rate of 80,000 rads. On this basis calculations indicated that a 5 kilocurie source of Co60 or a 7.8 kilocurie source of Cs137 would prevent any build-up of acetylene in a 28,000-gallon tank for a 10-year period. The most effective means of removing or passivating hydrocarbon contaminants in missile handling systems were investigated. Various experimental methods--treatment with gaseous fluorine, fluorination in Freon solutions, electrochemical fluorination, and vapor phase degreasing with Freons-were investigated. It was concluded that vapor phase degreasing with Freons is the most promising means of cleaning a system, and a discussion is given of the various problems encountered in the use of this method. Author