Kabushiki Kaisha Toshiba

Yasuo Osawa

Yuji Yamamoto

Kenji Arai

Mika Tahara

Makoto Harada

An apparatus for removing flammable gas is started only when a concentration change in the flammable gas in a primary containment vessel is detected, so that the decrease in activity of a catalyst due to a catalyst poison is prevented. This apparatus has a catalytic recombining apparatus equipped with a catalyst for reacting the flammable gas, a case that houses the catalyst, and lids and installed at openings and of the case Adhesive parts and which adhere the lids and and the case is melted at high temperatures, and heating elements and composed of an oxidizing catalyst of hydrogen is installed in contact with the adhesive parts and Thus, the lids are not only closed under normal conditions but opened when the adhesive parts and being melted along with the temperature increase in the surrounding atmosphere.

Apparatus for removing flammable gas

A sensing circuit is disclosed wherein a first MOS transistor is connected in series with a load to produce a source to drain voltage in response to the load current. A reference voltage generating circuit includes a second MOS transistor and provides a reference voltage determined by the source-to-drain voltage of the second MOS transistor in response to a constant current supplied thereto. A comparator circuit compares the source to drain voltage of the first MOS transistor with the reference voltage to sense the load current.

Growing community of inventors

Kanagawa-ken, Japan

Yasuo Osawa