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Latest News
PG&E to dredge Diablo Canyon intake system
The owners of the Diablo Canyon nuclear power plant plan to dredge a massive buildup of shoaled sediment from its seawater intake cove.
Pacific Gas and Electric spokesperson Suzanne Hosn said, “The dredging project in the Diablo Canyon marina will remove approximately 70,000 cubic yards of sediment to prevent circumstances that could impact the power plant’s cooling system. Dredging will take place for the first time since operations began because of a rapid increase in sediment.”
H. Oka, M. Nishikawa, T. Takeishi, J. Yamaguchi, M. Nishi, T. Hayashi, K. Kobayashi
Fusion Science and Technology | Volume 41 | Number 3 | May 2002 | Pages 658-662
Safety and Safety System | Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001 | doi.org/10.13182/FST02-A22669
Articles are hosted by Taylor and Francis Online.
The system effect of tritium arises from the interaction of tritium in the gas phase with water on the surface of piping materials. It has been reported that the system effect can be quantified by applying the serial reactor model to the piping system, connection of perfect mixed flow type reactors and plug flow type reactors, and that adsorption and isotope exchange reactions play the main roles in the trapping of tritium. In this study we made a calculation code of the system effect using the serial reactor model where 304SS, aluminum, copper or graphite is used for the piping material. Comparison of the calculated value using this code gives the good agreement with the experimental data taken at the cooperative experiment using a box made of stainless steel type 304 in Tritium Processing Laboratory in JAERI and that is called as the Caisson. It is observed that the isotope exchange reaction between tritiated water in the air and surface water on the 304SS surface controls the tritium trapping performance at the room temperature although HTO/HT ratio is around 0.1 in this experiment.