Plant construction method and reactor pipe cleaning method

摘要

PURPOSE: To shorten construction process as a whole by excluding washing work of reactor piping from the critical path in the construction process of a reactor power plant. CONSTITUTION: Among rector piping, the main steam isolation valve 42 of main steam system line 21 outside of reactor containment 2 and the check valve 43 of a water supply system line 23 outside of the containment 2 are connected as bypass with a tentative pipe 28 and reactor piping outside the containment 2 is washed. On the other hand, the reactor piping inside arranged inside of the containment 2 and excluded from the washing is processed for corrosion resistivity in advance with water soluble or volatile corrosion resistive agent. When the reactor piping excluded filled with water, water is sent in the reactor piping excluded from washing and corrosion resistive agent and foreign articles are removed. Thus, with no relation to the placing work of reactor piping inside the containment 2, washing of the other reactor piping can be finished and construction process of the reactor power plant can be shortened.