Between the time of the discovery of nuclear fission in early 1939 and the end of 1946, approximately 90 “nuclear piles” were constructed in six countries. These devices ranged from simple graphite columns containing neutron sources but no uranium to structures as complex as the water-cooled 250-MW plutonium production reactors built at Hanford, Washington. This paper reviews and compares the properties of these piles.

中文翻译：

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二战期间核电堆发展的国家间比较

从 1939 年初发现核裂变到 1946 年底，六个国家建造了大约 90 个“核堆”。这些装置的范围从包含中子源但不含铀的简单石墨柱，到与在华盛顿汉福德建造的水冷 250 兆瓦钚生产反应堆一样复杂的结构。本文回顾并比较了这些桩的特性。