Kabushiki Kaisha Toshiba

Ko Minakami

Katsumi Hisano

Hideo Iwasaki

Tomiya Sasaki

Tsutomu Shioyama

Koichiro Kawano

Takao Fujii

Koichi Ohtomi

Toshio Maeda

Toshinori Terashima

A heat sink according to the invention comprises a multilayered body prepared by laying one upon the other a plurality of heat sink fin elements having pin-fin sections formed by cutting a number of slits through thin plates of a thermally conductive material with spacers, each being inserted between two adjacent heat sink fin elements to separate them by a given distance. The method of preparing a heat sink comprises steps of preparing heat sink fin elements by forming a number of slits and a surrounding marginal frame area in each of a first set of thermally conductive thin plates, preparing spacers by cutting out a central area of and forming a surrounding marginal frame area in each of a second set of thermally conductive thin plates having a shape same as that of the first set of thin plates, laying said heat sink fin elements and said spacers alternately one upon the other and bonding said assembled heat sink fin elements and spacers together at the outer surface or contacted areas to form a multilayered body.

Heat sink and the producing method thereof

A nuclear reactor internal pump has a pump shaft connected to a motor and rotatably passing through the bottom of a nuclear reactor pressure vessel, an impeller fitted to a front end portion of the pump shaft, a diffuser disposed on the downstream side of the impeller and having an inner cylinder fixed to the bottom of the reactor pressure vessel to surround the pump shaft, a purge water passage defined between the pump shaft and the inner cylinder to communicate with the inside of the reactor pressure vessel and a purge water supply device for supplying purge water to reactor pressure vessel through the passage. Further, the nuclear reactor internal pump comprises a clad dropping preventive device for trapping clad coming from the reactor pressure vessel in the passage to prevent the clad from dropping.

Internal pump for nuclear reactor

Growing community of inventors

Kawasaki, Japan

Ko Minakami