Update: Some internet sources quoted wavelengths, and relative harm where outside of optical light range i.e. 400-700nm. However, when assessing risks, I believe we need to measure millisivierts, and here the conversion or information runs short. To reiterate my point in my original post, maybe I'm looking at too much detail to say controls are already in place, but has anyone got any previous experience in demonstrating they've met the requirements of the COAR regulations regarding assessment considerations?

Sent PM which should help Chris

Thank you Ian Bell for the useful information. What an excellent and encouraging safety professional you must be. I try meeting regulations as written and request assistance for comparatively low risk radiation regarding welding arcs. And you point out I had mixed terminology up Bravo

Thanks again, I've looked at the EU non-binding guidance since the post, and a helpful chap PM'd me a link in the right direction. As I thought, not many would attempt to meet the requirements of regulation 5 in full detail, and safety can be achieved with simple controls. I was simply trying to meet as much of the information required by the Reg's as possible. Thanks all who contributed.

To try and answer the OP question: Risk Assessment must take consideration of— (a)the level, wavelength and duration of exposure Where can I find data on the artificial optical radiation emitted from welding? The intensity and wavelength of UV emitted from welding will vary according to the type of welding and the rate of shield gas used: http://annhyg.oxfordjour...org/content/41/1/95.long http://annhyg.oxfordjour...ontent/45/7/597.full.pdf (both free) The wavelength you can assume the range, the duration you can know or set, the level however is more difficult, but if your control is to eliminate the risk through covering skin and filtering eye protection (not time weighting exposure) any such measurement in this case seems arbitrary? Examples of measurements and results do exist (see above journal entries) if required and also here I found: http://www.dguv.de/medie...ission_schweissen_en.pdf For shading type and filters for eye protection there is plenty of guidance available, such as: https://www.osha.gov/Pub...ction-during-welding.pdf