A former nuclear power plant designer with 36-year-experience Yuzo Uehara sent his proposal with the diagrams to this blog. Thank you, Mr. Uehara.
The Culvert Prefabrication Method System to cool down Fukushima Daiichi nuclear reactors while minimizing radiation exposure
(Some texts have not been translated since most of them have been already covered by his tweets. So, please refer to the translated texts on this blog.)
(click the images to enlarge)
The original diagrams are here and here.
A former nuclear power plant designer Yuzo Uehara raises some questions that are out of his field.
261720: I think those who are related to river hydraulics in Japan have been already working, but we already know that the path of the radiation contaminated water goes like this: rain > mountains underground water channels > rivers > dams > rivers > sea. After using underground pools with cascade to dilute, you can estimate where the best place to discharge is. Propose the solution for Japan!
261740: To all experts in meteorology. Please estimate where wind blocking walls should be installed around the site and how large and high they should be. And, when it rains or snows, radiation goes up at the site ground, but can the walls prevent radiation from spreading out?