Leaks of radioactive substances from fuel rods are suspected to have occurred at a nuclear power plant in Tsuruga, the Fukui prefectural government said Monday, citing a rise in the level of radioactive substances in coolant water. The operator, Japan Atomic Power Co., will manually shut down the No. 2 reactor of the plant on the Sea of Japan coast and examine the primary cooling system for it. The local government denied that the levels of radioactive substances could threaten the nearby environment. According to Japan Atomic, 4.2 becquerels of iodine-133 and 3,900 becquerels of xenon gas were detected per...