1974-07-25
1976-10-12
Engle, Samuel W.
176DIG2, 52224, 52249, G21C 1304
Patent
active
039856143
ABSTRACT:
A nuclear reactor metal pressure vessel is surrounded by a concrete wall forming an annular space around the vessel. Thermal insulation is in this space and surrounds the vessel, and a coolant-conductive layer is also in this space surrounding the thermal insulation, coolant forced through this layer reducing the thermal stress on the concrete wall. The coolant-conductive layer is formed by concrete blocks laid together and having coolant passages, these blocks being small enough individually to permit them to be cast from concrete at the reactor installation, the thermal insulation being formed by much larger sheet-metal clad concrete segments. Mortar is injected between the interfaces of the coolant-conductive layer and concrete wall and the interfaces between the fluid-conductive layer and the insulation, a layer of slippery sheet material being interposed between the insulation and the mortar. When the pressure vessel is thermally expanded by reactor operation, the annular space between it and the concrete wall is completely filled by these components so that zero-excursion rupture safeguard is provided for the vessel.
REFERENCES:
patent: 3356588 (1967-12-01), Beliaev
patent: 3438857 (1959-04-01), Sulzer
patent: 3712851 (1973-01-01), Isberg et al.
patent: 3898126 (1975-08-01), Dorner et al.
patent: 3899391 (1975-08-01), Sulzer et al.
patent: 3899393 (1975-08-01), Dorner et al.
Engle Samuel W.
Kraftwerk Union Aktiengesellschaft
Nelson Peter A.
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