与压水堆核电站不同 ,重水堆核电站的核反应堆是利用天然铀作燃料 ,用重水做慢化剂和冷却剂。目前全世界正在运行的 4 0 0多个核电机组中 ,绝大多数是压水堆 ,只有 32个是重水堆。重水堆核电站不用浓缩铀 ,而用天然铀作燃料 ,比压水堆的燃料成本低 2 / 3,但用作慢化剂和冷却剂 Unlike PWR nuclear power plants, nuclear reactors for heavy water reactor nuclear power plants make use of natural uranium as a fuel and make heavy water moderators and coolants. At present, the overwhelming majority of the more than 400 nuclear power plants in operation in the world are PWRs, and only 32 are heavy water reactors. Heavy-water reactor nuclear power stations do not enrich uranium, but use natural uranium for fuel, compared with PWR fuel costs 2/3, but as a moderator and coolant