According to the Consultative Committee on Units of the BIPM, which takes advice from the various international organizations in chemistry, when referring to an element e.g. curium, you should only capitalise at the beginning of a sentence, Oxygen is capitalised when at the start but not when within viz. oxygen. It would be helpful if the ICRP, as an esteemed international organization, would set an example in such matters also on its web pages. The EUTERP has shown the way today in its www.EUTERP.eu news.