Earth covered in-the-ground nuclear reactor facility

Details Earth covered in-the-ground nuclear reactor facility Earth covered in-the-ground nuclear reactor facility

1978-03-27

1981-01-13

Perham, Alfred C.

Static structures (e.g., buildings)

Specified terranean relationship

With drain or vent exterior to foundation perimeter

521696, 176 87, 176DIG2, E02D 2700

Patent

active

042441536

ABSTRACT:
A clay layer of low permeability and of a thickness of about 2 meters, depending somewhat upon the permeability, immediately covers and laterally surrounds the external concrete wall and roof structure of the nuclear reactor building, this layer extending at least down to a ground water draining or leading ground layer. Above it is a layer of gravel, sand or porous stone of relatively high permeability, typically somewhat less than a meter thick, and on top thereof an earth fill layer of less permeability than the intermediate layer is provided, which is typically 8 meters thick. The clay layer, which could also be a loam layer, prevents the emergence of radioactive materials in the event of cracking of the concrete structure by an accidental malfunction and absorbs aerosols and water-soluble fission products. The gravel layer converts the convective mass flow of the emerging materials into a diffusion flow and prevents the spreading of cracks in the covering layers. In the thick earth fill layer on top, any radioactive materials still spreading are transported only by a process of diffusion. If protection is to be provided against the strongest external effects, a concrete paving can be put on top of the earth fill.

REFERENCES:
patent: 2277286 (1942-03-01), Bechtner
patent: 3021273 (1962-02-01), Dix
patent: 3258403 (1966-06-01), Malay
patent: 3712851 (1973-01-01), Isberg et al.
patent: 4151689 (1979-05-01), Schabert
Underground Siting of Nuclear Power Reactors, V. N. Karpenko & C. E. Walt Oct. 25, 1974, 21 pages, a paper prepared for submittal to Proceedings IAEA/NEA Symposium on the siting of Nuclear facilities, Vienna, Austria, Dec. 9-13, 1974.

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