A further case of unauthorized access at a nuclear power plant on the Sea of Japan coast run by Tokyo Electric Power Company Holdings Inc. occurred in 2015, it was revealed Sunday.The operator of the Kashiwazaki-Kariwa plant has admitted to Kyodo News that a worker mistakenly used the identification card of his father, who was working at the same facility, in the morning of Aug. 21 of that year and was about to enter a protected area near its Nos. 6 and 7 reactors.The utility, also known as TEPCO, called local police after an alarm was set off at a security gate, but the operator did not di…READ FULL ARTICLE