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- W269313474 abstract "Water contaminated with Mo/sup 99/O/sub 3/ has been leaked through a 7- mil-diam. hole in a pipe wall from a 550 deg F, 2000 psig loop system into a 4000 cu ft compartment. Three separate tests were made, each consisting of a leak period and a period during which fall-out of air activity was observed. Run 8A was a leak from a lagged pipe; Runs 8B and 8C were from bare pipes. In Run 8A and 8B solution of Mo/sup 99/O/sub 3/ in H/sub 2/O was aided by NH/sub 4/OH: no NH/sub 4/OH was used in Run 8C. Steam collected under the asbestos cloth covering of the lagging and caused blistering but the lagging remained intact. Maximum air activities of 15, 990, and 630 mu mu c/ml were reached in 5, 3, and 51/2 hr in Runs 8A, B, and C, respectively. An attenuation of air activity of~38 resulted from use of the lagging. In Run 8A, ~60% of the leaked activity was caught in the insulation and 24.5% in the lagging drippings. In Runs 8B and 8C, 84% and an estimated 64% of the leaked activity was transferred through the air to the walls. Exponential fall-out coefficients of airmore » activity were 0.323 hr/ sup -1/, 0.227 hr/sup -1/, and 0.215 hr/sup -1/ respectively Comparisons with a previous run using Na/sup 24/ tracer indicate Mo/sup 99/ is the more hazardous air contaminant because of higher specific air activities, longer half-life and more difficult decontamination from walls. (auth)« less" @default.
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- W269313474 date "1955-09-14" @default.
- W269313474 modified "2023-09-27" @default.
- W269313474 title "RADIOACTIVE LEAK EXPERIMENT. (Run 8). Progress Report No. 10 for June 1 to August 15, 1955. Memo Report 89" @default.
- W269313474 hasPublicationYear "1955" @default.
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