Korea Advanced Institute of Science and Technology

Kepco Engineering & Construction Company, Inc.

Byung Jin Lee

Jin Seok Park

Yeon Ho Cho

Myoung Goo Lee

Hee Cheon No

Hyunmin Kim

Cheol Soo Maeng

Chang Kyu Chung

Hyeong Heon Kim

Provided is a secondary shutdown structure of a nuclear reactor, which uses sliding doors, and more particularly, to a secondary shutdown structure of a nuclear reactor, which uses sliding doors and is capable of shutting down a nuclear reactor reliably with a simple structure without using a boric acid solution.

Secondary shutdown structure of nuclear reactor by using sliding doors

Disclosed herein is an iodine-sulfur cycle for nuclear hydrogen production, which can improve thermochemical efficiency. The iodine-sulfur cycle is advantageous in that the amount of excess water and iodine supplied to a Bunsen reaction process is minimized, thus minimizing the amount of thermal energy consumed in the recovery and recirculation process thereof, in that sulfuric acid having stronger hydrophilicity than hydrogen iodide absorbs excess water in large quantities in a spontaneous liquid-liquid phase separation process, so that, after the spontaneous liquid-liquid phase separation process, the concentration of hydrogen iodide in a hydrogen iodide solution exceeds a concentration at an azeotropic point without conducting an additional concentration process, with the result that highly-concentrated hydrogen iodide gas can be obtained only through a flashing process, thereby decreasing energy consumption and simplifying the process and thus improving economical efficiency, and in that process temperature and pressure can be decreased, thus greatly deceasing the corrosivity in an operational environment. Therefore, the iodine-sulfur cycle according to the present invention can be usefully used for high-efficient and environmentally-friendly nuclear hydrogen production.

Iodine-sulfur cycle for nuclear hydrogen production with improved thermo-chemical efficiency

Growing community of inventors

Daejeon, South Korea

Byung Jin Lee