초록 ▼

The emergency core cooling structure according to the present invention is provided with a water storage container which holds therein emergency cooling water to be supplied to a core region in a nuclear reactor in case of an emergency, for example, when the primary cooling water flows out from a re

The emergency core cooling structure according to the present invention is provided with a water storage container which holds therein emergency cooling water to be supplied to a core region in a nuclear reactor in case of an emergency, for example, when the primary cooling water flows out from a reactor vessel, so as to maintain the temperature of the emergency cooling water in the upper portion of the water storage container in a level higher than the level of that of the emergency cooling water in the lower portion thereof, the lower portion of the water storage container, which is filled with the low-temperature cooling water, being communicated at all times with the core of the nuclear reactor by a means which has substantially no movable member. When the primary cooling water flows out, so that the pressure in a reactor vessel decreases, the emergency cooling water in the high-temperature region is boiled to expand to cause the low-temperature emergency cooling water in the lower portion of the water storage container to be raised, the resultant low-temperature emergency cooling water being supplied to the core region.

대표청구항 ▼

A nuclear reactor comprising: a nuclear reactor pressure vessel containing nuclear fuel and cooling water; a liquid storage container containing an emergency cooling liquid so as to separate it from said cooling water, and keeping the temperature of an upper part of said emergency cooling liquid hig

A nuclear reactor comprising: a nuclear reactor pressure vessel containing nuclear fuel and cooling water; a liquid storage container containing an emergency cooling liquid so as to separate it from said cooling water, and keeping the temperature of an upper part of said emergency cooling liquid higher than that of a lower part thereof, the lower part of said emergency cooling liquid being lower in temperature than the cooling water in said pressure vessel; means, substantially free from any movable parts, for always communicating the lower temperature region of said liquid storage container and a reactor core region; and wherein said liquid storage container is provided outside said pressure vessel, and a heater for heating the emergency cooling liquid is provided in an upper portion in said liquid storage container, whereby when the cooling water in said pressure vessel flows out thereby to cause the pressure of said pressure vessel to decrease, the emergency cooling liquid in the high temperature region of said liquid storage container boils to generate vapor, the pressure of said vapor depresses the low temperature emergency cooling liquid in the lower part of said liquid storage container and supplies said emergency cooling liquid to said reactor core region of said pressure vessel through said communicating means.