Off-gas processing system operations for mercury target vessel replacement at J-PARC

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Abstract

An off-gas processing system was installed in the J-PARC spallation neutron source to reduce radioactivity of xenon-127 and tritium contained in a helium cover gas in a surge tank of a mercury circulation system to obey the regulation by law. In addition to this role it has been utilized to a purging process before the target vessel replacement and an air-flow control procedure to minimize uncontrollable radioactivity release during the replacement. An standard and urgent model plans of the off-gas processing system operation were established indicating that 31 days were required at least to replace the target vessel.

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Kai, T., Uchida, T., Kinoshita, H., Seki, M., Ooi, M., Wakui, T., … Takada, H. (2018). Off-gas processing system operations for mercury target vessel replacement at J-PARC. In Journal of Physics: Conference Series (Vol. 1021). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/1021/1/012042

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