Kabushiki Kaisha Toshiba

Tomohisa Kurita

Takashi Sato

Mika Tahara

Yuka Suzuki

Hirohide Oikawa

Yoshihiro Kojima

Makoto Akinaga

Mitsuo Komuro

Masashi Tanabe

Ryoichi Hamazaki

Noriyuki Katagiri

Seiichi Yokobori

A core catcher includes a holding surface that catches and holds corium and that introduces a surrounding coolant into the core catcher and cool the core catcher by heat exchange with the introduced coolant. The holding surface and the cooling unit are constructed by arranging blocks which each include a polyhedron having at least one pair of parallel surfaces and having an opening portion formed in a surface located in a lateral direction when a first surface that is one of the parallel surfaces is arranged as a bottom surface and are configured such that the polyhedrons communicate with each other via the opening portion when the polyhedrons are arranged adjacent in the lateral direction. The core catcher can achieve easier installation of the blocks without an increase in installation cost.

Core catcher

Core debris generated during a molten reactor core in a reactor containment vessel penetrating the reactor containment vessel is configured to be caught by a core catcher located beneath the reactor containment vessel which has a main body having first stage cooling water channels and second stage surrounded by cooling fins extending radially. The number of the second stage cooling channels is larger than that of the first stage cooling channels. Cooling water is supplied from a cooling water injection opening and distributed to the first cooling water channels at a distributor. An intermediate header is formed between the first and the second cooling water channels, and the cooling water is distributed to the second cooling water channels uniformly.

Core catcher, manufacturing method thereof, reactor containment vessel and manufacturing method thereof

Growing community of inventors

Kawasaki, Japan

Tomohisa Kurita