The operator of the wrecked Fukushima nuclear plant began tests on Monday of newly constructed facilities for discharging treated radioactive wastewater into the sea, a plan strongly opposed by local fishing communities and neighboring countries. The tests at the Fukushima Daiichi nuclear power plant use fresh water instead of the treated water, operator Tokyo Electric Power Company Holdings said. Plant workers examined pumps and emergency shutdown equipment at the newly constructed seaside facility, which will dilute the treated water with large amounts of seawater. The diluted water then enters an undersea tunnel and is released into the ocean about 1 kilometer (0.6 miles) from the coast.