After a critical component is brought into service in a nuclear power plant,a periodic inspection (in-service inspection) is carried out to check for the integrity of the safety related component.A test with ultrasound plays a central part in this in-service inspection.After the accident at the Fukushima Daiichi Nuclear Power Plant,which was caused by the Great East Japan Earthquake,such periodic inspection of Japanese nuclear power plants are very rarely carried out.On the other hand,there is a need for an initiative to develop nuclear component inspection rules so as to increase the inspection transparency,safety and reliability of nuclear energy and gain recognition from the society.This would be beneficial due to a growing demand for technological innovation when inspecting nuclear component.
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