The French-German consortium Areva-Siemens (AREVA.PA)(SIEGn.DE), the supplier of Finland’s much-delayed Olkiluoto-3 nuclear reactor, has increased its claim against Finnish utility Teollisuuden Voima (TVO), TVO said late on Friday. TVO and Areva have traded accusations about who is to blame for delays and extra costs, and the International Chamber of Commerce’s (ICC) arbitration court is processing a dispute on cost overruns between the two sides.