| 31. | U . S . nuclear plants are protected by containment buildings with 4-foot-thick concrete walls lined with steel.
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| 32. | "The purpose of the test is to ensure that the containment building can maintain its integrity, " he said.
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| 33. | In modern Russian plants, there is a " core catching device " in the bottom of the containment building.
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| 34. | It possesses a modest containment building, and the ECCS systems, though not completely to Western standards, are reasonably comprehensive.
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| 35. | Almost certainly the hydrogen was formed inside the reactor vessel with the hydrogen subsequently vented into the containment building.
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| 36. | Although a calandria-based core is cheaper to build, its size increases the cost for standard features like the containment building.
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| 37. | Containment buildings are designed for the orderly release of pressure without releasing radionuclides, through a pressure release valve and filters.
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| 38. | Both a working PORV with quench tank and separately the containment building with sump provided two layers of passive safety.
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| 39. | The containment building itself is typically an airtight steel structure enclosing the reactor normally sealed off from the outside atmosphere.
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| 40. | The spill was confined to the plant's containment building, and regulators have said there is no risk to the public.
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