With increased demands on the nuclear reactor designs, such as longer lifetimes and higher operating temperatures, it is mandatory that the safety standards in place is correspondingly evaluated.
The Latest from Fukushima
The investigation report indicates that the explosions in units 1 and 3 were due to hydrogen leakage through the silicone rubber seals of the electrical cable penetrations. These seals were likely to have lost functionality due to exposure to high temperature.
In-depth analysis of the investigation as well as updates about the situation is available on Tepco’s website.
Furthermore, the investigation results have been reviewed in terms of higher safety specifications for electrical penetrations, e.g. higher pressure and higher temperatures as well as withstanding the flooding of the containment vessel. Click here to find out more.