On its maiden voyage, the Soviet nuclear-powered submarine <a href="https://en.wikipedia.org/wiki/Soviet_submarine_K-19" id="mwAas" rel="mw:WikiLink" title="Soviet submarine K-19"><i id="mwAaw">K-19</i></a> suffers a complete loss of coolant to its reactor. The crew are able to effect repairs, but 22 of them die of <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Radiation_poisoning" id="mwAa0" rel="mw:WikiLink" title="Radiation poisoning">radiation poisoning</a> over the following two years.