| 摘要 |
844,884. Nuclear reactors. A.E.I.-J. THOMPSON NUCLEAR ENERGY CO. Ltd. Oct. 3, 1958 [Oct. 9, 1957], No. 31575/57. Drawings to Specification. Class 39(4). The graphite core of a reactor is formed in zones which have different amounts of Wigner growth compensation in accordance with the zone neutron flux and temperature. The core is formed of columns built from blocks, and the horizontal Wigner gaps between blocks are largest in the zones having the highest neutron density and lowest temperature. The latter are near the core base while the lower Wigner growth and compensation is provided in the upper zones. Those columns which provide compensation are formed of blocks with the grain direction vertical and separated by plates, at their upper and lower surfaces, having their grain directions horizontal and which engage the corresponding plates of adjacent columns. The overall Wigner growth in core horizontal dimensions increases uniformly towards the base, thus preventing misalignment of the fuel rod channels. |
