[1] Development history and future trends

The history of PWR power plants in Japan started from the Mihama Unit 1 built with technology introduced from the United States in the late 1960s [33]. Since then, the plants have been improved and standardized [34] toward high power density and large size without a significant change in the basic design specifi­cations. Economy and reliability in core and fuel utilization technology have also been improved as follows.

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Fig. 3.57 Typical suppression of axial power distribution oscillation [32] (17 x 17 Type, 3-loop core, and EOC) (Copyright Mitsubishi Heavy Industries, Ltd., 2014 all rights reserved)