| 摘要 |
PROBLEM TO BE SOLVED: To evaluate highly accurately pressure pulsation in a steam dome of a pressure vessel of a nuclear power plant, to confirm accurately the integrity of a drier in the pressure vessel, and to improve the safety of the nuclear power plant. SOLUTION: Pressure sensors 7 are installed at a plurality of spots at each distance in the length direction of a pipe 5, on the pipe 5, for example, a pipe for measurement having no flow and connected to the steam dome 1 provided at an upper part of the pressure vessel of a boiling water reactor, and the pressure pulsation in the steam dome 1 is evaluated accurately through the pipe 5 without being influenced by a steam flow based on sensor results from the pressure sensors 7, and the evaluation result is used as a base for evaluating the integrity of the drier. COPYRIGHT: (C)2009,JPO&INPIT
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