Document OJELd3XRmko6mEE85zRaYXEgL

Industrial Hygiene Digest jRADIOACTIVITY AND X-RADIATION June, 1965 586 Survey of X.Rav Protection Practices Among Michigan Veterinarians. C.A. Jacobson and D.E. Van Farowe. ~ j Am Vet. Med. Assn. M5, 793-797 <Oet. 15. 1964). Each time a radiographic or fluoroscopic unit is turned on, there is some risk of genetic damage or carcinogenic effects. Therefore, every effort should be made to reduce exposure of the operator wherever possible. According to a survey of veterinary radiologic equipment in use ui Michigan, a high percentage of units did not have adequate aluminum filtration or cones that would confine the beam to the area of diagnostic interest. As a result, the scatter radiation dose to the operator was much higher than necessary for each radiograph taken. Twenty.five illegal hand-held fluoroscopes were found in use, and protective gloves and aprons were lacking in several animal nospitals. Few establishments used film badges or other devices to monitor radiation exposure. In addition to faulty equipment, a number of potentially dangerous procedures existed;. - Although veterinarians were aware of the dangers ih using radiographic equipment carelessly and understood control techniques, many did not apply this knowledge to everyday practice. A visit was made to each veterinarian's office or hospital where a registered x-ray or fluoroscopic machine was located, and each unit was physically inspected and the radiation measured. Then the owner was sent a letter listing the necessary changes that would reduce over-all radiation exposure. - Public Health Eng Absts 587 On the Retention of Cesium-137 in People. M.A. Van Dilla Health Phys. 2.1.*2 (Jan. 1965). Cesium-137 retention following four eases o: accidental contamination was measured as a function of time in the Los Alamos human spectrometer and counter. Inhalation was the primary route in at least three of these exposures A simple exponential function fits the data well, the biological half-time averaging 133 davt T.-.ere are 7 references. - - Public Health Eng. Absts 588 The Cesium 1 37 Content of Beef from Dairv ana Fret.-at Cattle C.M. Ward and J Johnson Health Phys.'^U, 9$.100 (Feb. 19&5). Samples of meat were collected from proe-c.-g ta.rv cows, drv cows, young calves, and feed.lot fattened cattle and analyzed for C` .vm.-r., iat and moisture. The diets which were contaminated with varying levels o: ... ` were analyzed to estimate daily intake of the nuclide. The Cs137 levels/kg o: c.:.i --rat .eveied off at less than 1 % of the daily intake in mature dairy cattle, at 3% in fees-.r .* ar.d at 15% in calves. It ts not . clear whether differences are due to age or tr.e c.v e-.mais The ratio of activitv meat. milk/kg. ranged from 1.2 to 4.9. It : s tv. - * r : - * v.r a. e rage consumer will obtain more Cs-1 37 from milk than beef, although jr.sr r -- . o-iditions the reverse eoulc easnv occur. --APCA Absts 5sJ Rehabilitation of a Radioactive Building. H C hare Public Health Repts TO, 829-835 (Sept. 1 *>64. The restoration of a contaminated buiIfL'.g ,* inir.oec . This was.a cancqr. clinic . that had become contaminated through decades o: rac..m tr.erapv. Activity from radon ncecies ana contaminated waste had spread over the entire the form of surface contamination and imbedded needles. The radiation hazard *.i rrm. tc ji w prescribed procedure consisting of a thorough survey to mark off contaminated arr.i :ita..`d vacuuming, scrubbing, mopping and rinsing operations, floor sealing and retilmg. an: ..nsia.-ation of false walls and ceilings to prevent paint peelings from introducing suoseauer.t contamination. Complete decontamir.atio* was assured in a final survev. -. Public Health Eng Aovi 20 01 132 2675