At 15:41 on July 23, 2022, after three days of hard struggle, the third module of the built-in refuelling water tank in the nuclear island workshop of Hainan Changjiang Nuclear Power Unit No. 4 was firmly placed on the foundation. At this point, the entire lifting of modules in rooms R141 to R143 was completed, and the MKJ assessment point was completed 28 days ahead of the three-level schedule. This hoisting marks the beginning of the construction of stainless steel pool in nuclear island plant of No. 4 unit.
The built-in refueling water tank in the nuclear island workshop of No. 4 Unit of Hainan Changjiang Nuclear Power Plant is located in the internal structure of -6.696m ~ -3.830m. The pool wall of the room and all the roof are constructed by the first sticking method, and the bottom plate is constructed by the later sticking method. Rooms R141~R143 are three separate integral modules, which are lifted by the whole, and the heaviest lifting module this time is about 9 tons.
As hainan ChangJiang nuclear power unit 4 reactor building construction is the key important work on a line, hainan projects department coagulation hearts meet force, the initiative as, firmly grasp the elaborating management idea, by the stainless steel cladding surface subdivided into small units, track workshop schedule, every day compared with on-site construction progress, a first load resources to eliminate risk constraints, Finally, flow construction is formed on site, so that the workshop prefabrication and on-site construction can achieve "zero distance". At the same time, we fully summarized and absorbed the experience and feedback of the construction of the stainless steel pool of Unit 3, formulated practical countermeasures, and finally ensured the smooth installation of the integral module of the refueling tank built in the nuclear island of Unit 4.