In 1992, PGE spent $4.5 million to successfully defeat ballot measures seeking to close Trojan immediately, rather than within four years, as PGE had At the time, it was the most expensive ballot measure campaign in Oregon history. A week after the election, the Trojan plant suffered another steam generator tube leak of radioactive water, and was It was announced that replacement of the steam generators would be necessary. In December 1992, documents were leaked from the U.S. Nuclear Regulatory Commission showing that staff scientists believed that Trojan might be unsafe In early January 1993, PGE chief executive Ken Harrison announced the company would not try to