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49-2游泳池反应堆(49-2堆)是游泳池堆型。1959年开始建造,1964年12月20日首次达到临界,1965年3月开始大功率运行,至今已运行45年。49-2堆是由我国自行设计、建造、安装、调试和运行的第1个研究堆。设计额定功率为3.5kW,加强功率为5.0kW。由于49-2堆已运行了40多年(目前只允许在3.5kW功率下运行),当时的核安全法规要求也并不完善。随着时代的进步,设计手段的不断更新,安全评估方法和工具的不断完善,安全当局对核安全的要求也更为严格。为此,需对49-2堆在现有的条件下,是否能够在5.0kW功率下安全运行做出评价。
49-2 Pool Reactor (pile 49-2) is a pool stack. Construction began in 1959, reaching its critical mass for the first time on December 20, 1964, and high-power operation began in March 1965 and has been in operation for 45 years. 49-2 Heap is the first research reactor designed, built, installed, commissioned and operated by our country. Design rated power of 3.5kW, enhanced power of 5.0kW. Since the 49-2 reactor has been in operation for more than 40 years (currently only operating at 3.5kW), the nuclear safety regulations at the time were not perfect. With the progress of the times, the continuous updating of design tools and the continual improvement of safety assessment methods and tools, the safety authorities are also demanding more stringent requirements on nuclear safety. To do this, we need to assess whether the 49-2 heap can safely operate at 5.0kW under the existing conditions.