Construction works for No.3 plant in Hamaoka Nuclear Power Station

In the Hamaoka Nuclear Power Station, Chubu Electric Power Co., Inc., No.1 plant of 540 MW and No.2 plant of 840 MW started the operation in March, 1976, and November, 1978, respectively. As to No.3 plant with 1100 MW output, the excavation for the foundations of main buildings was begun in November, 1982, and main construction works were started in March, 1983. As of July, 1984, the rate of progress was about 65%, and the start of commercial operation is scheduled in September, 1987. The topography and geological features of the site are explained. The specifications of No.3 plant of BWR type are shown. The method of water intake was decided by considering the minimizing of the effect of the works on fishery and the coast with much drift sand, in front of the site. The major construction works are those of site preparation, water intake tower, water intake tunnel, water intake tank, drainage canal, the foundation for circulating water pipes and various ducts. The total earth volume of this construction works was about 2.1 million m3, the total quantity of ready mixed concrete was about 120,000 m3, and the reinforcement used was about 9,000 t. Attention was paid especially to the quality control and safety. The state of progress of building works was about 43%. (Kako, I.)