Читать книгу Patty's Industrial Hygiene, Physical and Biological Agents - Группа авторов - Страница 127

Traditionally, radiation control principles have been summarized under the rubric of “time, distance, and shielding.” “Time” as a control principle refers to reducing risk by limiting the duration of exposure to the radiation. “Distance” refers to the reduction in risk associated with increasing the distance from the source. “Shielding” refers to the presence of an opaque or filtering medium between the source and the worker.

An additional control principle to consider is source optimization. Optimizing a source would include operating a source at the lowest power necessary to do the job, and, if possible, selecting sources with reduced spectral output in the blue‐light, UV‐A, UV‐B, and/or UV‐C regions if these wavelengths are not needed for the practical application.