ACCIDENT COUNTERMEASURES, NUCLEAR POWER PLANT, AND RADIATION SHIELDING METHOD

摘要

To provide nuclear power plant accident countermeasures which effectively prevent or minimizes the risk of steam explosion by minimizing deterioration of additives such as PEG caused by radiation from radioactive substances, and to provide a nuclear power plant with such accident countermeasures applied thereto, and a radiation shielding method.SOLUTION: A nuclear power plant accident countermeasures are disclosed, comprising providing a plurality of small floating structures 11 having a specific gravity less than that of water in a pedestal 3, a lower portion of a reactor pressure vessel, by an amount that at least covers a surface of stored water 4 that has been injected into the pedestal 3.SELECTED DRAWING: Figure 1