【美国《核安全》1986年7—9月号27卷第3期第385页报道】自70年代中期以来,工业界认识到,大部分核电厂的寿命可以大大超出许可的运行期限。1974年6月,美国法规(《法规导则》1.86)规定,允许采用新的核蒸汽供应系统或化石燃料蒸汽供应系统为现有汽轮发电机提供蒸汽。但这意味着电厂最花钱的部分,即原有的核蒸汽供应系 [U.S. “Nuclear Safety” July-September 1986, No. 27, Issue 3, page 385] Since the mid-1970s, the industry has realized that the lifespan of most nuclear power plants can greatly exceed the operating period of the license. In June 1974, US regulations (Regulation 1.86) stipulated that new nuclear steam supply systems or fossil fuel steam supply systems could be used to provide steam for existing turbine generators. But this means that the most expensive part of the power plant is the original nuclear steam supply system.