SEOUL, South Korea (AP) — South Korea will send a 21-member team of government experts to Japan next week to visit the Fukushima nuclear power plant where they will review contentious Japanese plans to release treated but slightly radioactive water into the sea. The six-day visit starting Sunday will focus on examining the plant’s processing system, which reduces radioactive materials from contaminated water, and whether the treated water would be safe enough to be diluted and discharged into the ocean, officials said Friday. The safety of the water for years has been a sensitive issue between the U.S. allies, who are now working to repair long-strained ties to address joint challenges like the North Korean nuclear threat and China’s assertive foreign policy.