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Report No.
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Development of reactor water level sensor for extreme conditions

Miura, Kuniaki*; Shibata, Akira ; Nakamura, Jinichi ; Ogasawara, Toshihiko*; Saito, Takashi; Tsuchiya, Kunihiko 

In the Fukushima accident, measurement failure of water level was one of the most important factors which caused this serious situation. The differential pressure type water level indicators are widely used in various place of nuclear plant but after the accident of TMI-2, the need of other reliable method has been demanded. And the BICOTH type and the TRICOTH type water level indicator for light water power reactors had been developed for in-pile water level indicator but currently those are not adopted to a nuclear power plant. In this study, the development of new type water level indicator which composed of thermocouple and heater, and the demonstration test and characteristic evaluation of the water level indicator were described.

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