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1CANDU6堆应急堆芯冷却系统的抗震设计要求CANDU堆是用天然铀作燃料、用重水作慢化剂和冷却剂的一种反应堆（见图1）。堆芯的压力边界是由数百根直径为10cm的压力管组成，每个压力管内装有12或13根短的燃料棒束（0．sin）在墨厚为0．44cm压力管的外边套有厚为014cm的排管容器排
Seismic Design Requirements for 1CANDU6 Reactor Core Cooling System The CANDU reactor is a reactor that uses natural uranium as a fuel and heavy water as moderator and coolant (see Figure 1). The pressure boundary of the core consists of hundreds of pressure tubes with a diameter of 10 cm each containing 12 or 13 short fuel bundles (0.sin) on the outer sleeve of a 0.44 cm-thick pressure tube There are thick row of 014cm row container row