Safety requirements light sources

Safety Requirements. Besides the potential danger of radiation for eyes (UV/VIS) and skin (UV), high-pressure light sources require special pre-... 

Light Sources and Delivery. In PIV, lasers are used only as a source of bright illumination and are not a requirement. Flash lamps and other white light sources can also be used. Some facilities prefer these nonlaser light sources because of safety issues. However, white light cannot be collimated as well as coherent laser light, and their use in PIV is not widespread. 

The operation of sources and associated facilities and equipment shall be controlled in accordance with a set of operational procedures and conditions, derived from a radiation safety analysis, that cover the safety of the source, the protection of individuals (including patients undergoing radiodiagnosis or radiotherapy) and of populations, and the generation of wastes. These procedures and conditions should be revised as necessary in the light of experience. Minimum requirements should be set for the availability of adequately trained staff and appropriate equipment. 

A 100 mL laboratory photoreactor with a mercury light lamp or a similar light source emitting at A < 400 nm (in case of a low-pressure Hg lamp with its main emission line at 254 nm or other sources emitting below 300 nm, it should be taken into account that a quartz glass setup is required), microdistillation setup, safety glasses, laboratory coat, and protective gloves. 

Determination of safety factors for the required UV dose due to lamp aging and fouling. Determination of UV intensity as a function of the transmittance or absorbance of filtered water samples by the point-source summation method or equivalent. The presence of suspended solids and colors can reduce the intensity of UV light in the waters. 

The Cinematograph (Safety) Regulations 1955 and subsequent amendments lay down the requirements for the electrical installation in cinemas. Where both the general and safety lighting are electric, there have to be two sources of supply to ensure maintenance of the emergency lighting in the event of mains failure. These Regulations are enforced by the local authorities. 

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