Document O1J6DK0vObBaBnok9wj42kBQX

I)61 oatic to -ray tl. I ft i | Ij tac.opes radio* lotopss otopes bite. R. Wlgh. aereby com* iseursurs or visioned* tbiti* y< 1 1: ihirir'* dietor. 4 pro- Hvnim', Di|j.'lMan.-li. I VC I tedgv of radioactivity level* present before operation begin*. A pre-operatlona) survey of environmental radioactivity ha* bvun in progress for 2 yearn In the vicinity of the power re actor being constructed in Southeastern Michigan by the Fowur Reactor Development Company Environmental radioactivity h*a demonstrated a general ineruaae throughout I*>St continuing into the spring of 1959. and a general decrease thereafter throughout 1959, -- Nuclear Scl. Absts, EASUREMENT5 j ENVIRONMENTAL MEASUREMENTS Improved Smoke Density Recorder. R. Lambiu. 7. $<i. Instr. i]_t M4-U?~(Apr7 I960). A smoke density recorder is described in which high stability is achieved by the use of stabilised circuit! for the light source and head amplifier. A method of calibration by means of optical density screens standardised for the type of photocell used is given. Drift caused by deposition of smoke on the optical system was overcome by the use of hot air jets. During ex tended lead on laboratory and industrial installations, stable operation with negligible drift was obtained. * A PCA Abate. it? A Now Gas Absorption Device, Its Application to Titrimetrje end Conductometric Micro De termination of Carbon Dioxide in Atr. lb Holm-Jcnen. Ansi. Chim, Acts it), 13-27 (July 1960). A gas absorption device is described which is capsble of absorbing gases from a sirsam of air (up to 15 ml, /min,) in a small volume (about 0. 5 ml. ) of absorbing fluid. The absorbing area of contact between air and liquid is about ISO #q, cm. The apparatus is pro vided with eleetrodes for measuring the electrolytic conductivity of the absorbing liquid. H tn be ueed In the determination of carbon dioxide in air by mean* of conductometric titrations) vtiual titrations with air by means of thymolphthalein arc also possible. No back-titration of the strontium hydroxide is needed. Public Health Eng, Absts. PREVENTIVE ENGINEERING I I 4C0-J JjjSWr/j ` Vour Air Pollution Problem. G, Gould. Power 104. 69-71 (July I960). # Typical partial analyse* of coal*, oil and gas are given. Pollutant* accompanying uinuMstlon include smoke and fumes, fly ash, various gases, organic vapor* and add mists. **' * batic techniques for air pollution abatement are to minimise formation of these and to *nmrnU those formed.-Veriatiun-of heating value* in coals is significant --In gas and oil It ef much less importance. Sulfur in coal occur* as iron sulfide and organic forms --In oil * m*rc&ptan*, sulfides and disulfides. Sulfur dioxide i* obnoxious and can be detected in as low as i ppm. Sulfur trioxide resets with moisture to form sulfuric add. 1 ** Irritating to ths reepiratury system in concentrations ef 3 ppm, Some relationship *l#li l**tween volatile content of fuel and smoke. Rapid and complete combustion of fuel Is c*,*niia|. High ash content increases the air pollution possibilities of the fuel. Dust from IKj' ****&e and handling is a problem. Wetting or treating with oil will Assist in controlling silane*. High moisture content in coal can cause heavy smoking. - - Public Health Eng. Absts, 23. s3a* ' ' " .