ENERGY

Wave-Powered Generator Sinks: The world’s first commercial wave-powered electric generator sank less than a month after it was towed into place off the northern coast of Scotland. The generator vessel Osprey developed leaks in two of its nine ballast tanks about 10 days ago, said Alan Thomson, managing director of Applied Research & Technology Ltd. He said it was not certain whether Osprey could be raised and repaired or would have to be replaced. “We’re very keen to replace this structure, put it on the seabed again in the same location--it’s a wonderful location,” Thomson said in an interview with Sky Television. Only the yellow funnel of the vessel was visible above the waters off Dounreay, 700 miles north of London. The 8,000-ton vessel, which cost $7.8 million to develop, was designed to generate two megawatts of electricity, enough to supply 2,000 homes.