Prime Winkel-wagen. Hallo, Inloggen. This means that distance is your friend – take a long step away and a source that can be fatal in 20 minutes at arm’s length will take 80 minutes to have the same impact – still dangerous, but a little less immediately so. Radiation dose rate drops off with the inverse square of one’s distance from a source, so doubling your distance reduces the dose rate by a factor of four (and tripling your distance, by a factor of nine). Ga naar primaire content.nl. At the same time we’ll talk about radioactive materials security and what protective actions make sense. Unlike the recent incident, the Goiania source was filled with easily dispersible Cs-137 as opposed to Co-60, which is typically found as a solid chunk of metal; this contributed to the wide spread contamination in Goiania compared to the relatively “clean” Mexican incident. In the most recent accident, the use of a proper shipping container, proper security procedures, and appropriate regulatory oversight were all lacking – attend to any one of these factors appropriately and the accident would not have occurred. (Juarez, Mexico) Circumstances surrounding radiation accident in Mexico involving destruction of cancer treatment radiation machine's core and inclusion of radioactive material in Mexican steel examined; incident said worse than Three Mile Island Implications for those exposed such as Pedro Torres and Vicente Sotelo noted; Sotelo's unconscious role in incident explained. When all was said and done, four people had died of radiation sickness and over a hundred were exposed to enough radiation or contamination to require medical attention.Another common theme is that many sources were being used by personnel who neglected to perform proper radiation surveys. Thus, when scrap metal scavengers broke into the clinic they were able to walk out with a radiation therapy unit, including a high-activity (almost 1500 curies) Cs-137 source. Probeer. Radiation surveys would also have shown that sources had become unshielded in accidents that occurred in Iran, Bolivia, Turkey, and elsewhere. The health toll of the Mexican accident is not yet known, although it seems likely that whoever removed the sources from the irradiator head would have received enough radiation to cause severe radiation sickness or death. Next week we’ll talk about some of these incidents as well as the risk posed by these sources should they go accidentally or deliberately astray. The perimeter was set up at a distance of 500 meters – the dose rate from an unshielded source here will be about 12 mR/hr – at least 500 times normal environmental radiation levels, but well within the realm of safety.
Although the source of radiation was never conclusively determined, the US Nuclear Radiation Commission strongly suspected that the source was an Iridium-192industrial radiographic source which had temporarily gone missing and had been in the care of a fellow industrial radiographer living near Crofut.