The article you linked to said the shipment came from India...

Either way, this is a legitimate concern that's happened in scrap metal processing all over the world: https://web.archive.org/web/20060614013429/http://www.iaea.o...

Another interesting tidbit (and how I found the above pdf): all steel made after 1940 is slightly radioactive due to nuclear testing, and unsuitable for high sensitivity applications. Some ships sunk in WWI are the primary source of all low-background steel: https://en.wikipedia.org/wiki/Low-background_steel