列举出机组处于“维修”时的主要参数。
参考答案：
反应堆处于次临界状态；
反应堆控制保护系统的控制棒全部位于最下端；
一回路冷却剂中硼酸浓度不低于16g/dm3；
一回路冷却剂温度小于70℃；
一回路压力为大气压；
稳压器中的温度小于70℃；
反应堆中的液位低于反应堆主接合面（200－300）mm或者是维修界线，但不能低于反应堆冷段管口上端线
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Student: Thanks. Teacher: How is your holiday? Student: Great! I had a 1 holiday. I traveled to Japan with my parents. Teacher: Really? What did you see there? Student: I saw a lot of 2 . Such as Mount Fuji and Sanrio Puroland. Mount Fuji is so wonderful that all of us want to climb up to the top. And Sanrio Puroland is the Hello Kitty land. We also visited the Hello Kitty's house. How lovely it is! Teacher: You must have a great time. Student: 3 . How about you? What were you doing 4 ? Teacher: I didn't 5 . But I have a good time staying at home, reading a lot of books. Student: Oh, that's interesting. It's time to have lunch. I must go. Bye. Teacher: Bye. 1._____ 2._____ 3._____ 4._____ 5._____ |