Patent Number: 052232085
Section: claims

1. A nuclear power generation system which comprises an underground dam formed with a cutoff wall on groundwater basin, a reactor installed within concrete walls on a bedrock below said underground dam, and an evaporation type cooling tower which houses water piping member for the primary cooling water for said reactor and is connected to a pipe for guiding in the water pooled in said underground dam, and which is so structured that a steam outlet and an air inlet of said cooling tower are respectively communicated with the surface via stacks. 2. A construction method for an underground nuclear power generation system comprising the steps of a) exploring a desirable groundwater basin by geological survey,  b) forming an underground dam by installing a cutoff wall of a predetermined height and length and substantially vertical to faults by pouring in concrete or water glass (sodium silicate) near the outlet of the groundwater basin,  c) installing a reactor on the bedrock below the underground dam and covering said reactor with a concrete shielding,  d) installing an evaporation type cooling tower adjacent to the reactor in such a manner that said cooling tower is communicated with the surface through a stack mounted at a steam outlet thereof and through another stack mounted at an air inlet thereof,  e) guiding the primary cooling water of the reactor and the water pooled in the underground dam into the cooling tower.