Kepco Nuclear Fuel Co., Ltd.

Nano and Micro Technologies Co., Ltd.

Young Baek Kim

Sang Jong Lee

Jae Don Choi

Seoung Eun Chun

Jung Seon An

Jae Il Lee

Hye Jin Kim

Young Jae Choi

Dae Jin Lee

Jin Seong Park

Dong Kyu Lee

Young Ho Park

Sung Ju Cho

Song Kee Sung

Goo Jin Jeong

Dong Uk Choi

Tae Je Kwon

Byung Chan Baek

Hae Nam Yang

In Whan Kim

Jae Kyu Lee

Kyung Woo Shim

Hae Chan Lee

Geol Woo Lee

Kyun Heo

Ji-Woong Kim

Do Young Oh

Dong Soo Kim

An apparatus for cooling a spent fuel pool having a heat exchanger includes a cooling water pool positioned above the spent fuel pool; a floating device configured to be elevated according to a water level of a cooling water in the spent fuel pool; and an emergency cooling water supply pipe configured to form a path through which the cooling water of the cooling water pool is moved to the spent fuel pool and configured to include a floating valve that opens or closes a flow passage of the cooling water in connection with the elevation of the floating device.

Passive cooling apparatus of spent fuel pool

A passive cooling system of a nuclear power plant includes a steam generator, a cooling water storage tank, a water cooling heat exchanger, an air cooling heat exchanger, a divergence valve, and a cooling tower. The steam generator generates steam by heat exchange with a primary coolant system, and the cooling water storage tank stores cooling water therein. The water cooling heat exchanger is disposed in the cooling water storage tank, and the air cooling heat exchanger is connected to the steam generator. The divergence valve is controllable to divert steam from the steam generator into both the water cooling heat exchanger and the air cooling heat exchanger. Each of the cooling water storage tank, the water cooling heat exchanger, and the air cooling heat exchanger are located in the cooling tower.

Passive cooling system of nuclear power plant

The present invention is related to hydrophilic silicone powders and the methods to prepare the same that contain 1-30 mol % of units selected from a group consisting of (a) partially hydrolyzed silsesquioxane containing one hydroxyl group (T2) and silica (Q3), (b) partially hydrolyzed silsesquioxane containing two hydroxyl groups (T1) and silica (Q3), (c) silica containing three hydroxyl groups (Q1), hydrolyzed silicone containing siloxane (D1), and mixtures thereof, and hydrophilic silicone powders consisting of core described above and shells composed of silica, and/or titanium dioxide. The particles are useful as ingredients for cosmetics and emulsions because they have good heat resistance, good touching feeling, and readily disperse in water due to their hydrophilic nature and high water absorbency.

Hydrophilic silicon particles with improved heat-resistance and touch feeling and methods for preparaing the same

A real time monitoring system of a spent fuel pool includes a detection unit configured to detect condition information using a sensor installed in the spent fuel pool; an input storage unit configured to receive and store configuration information of a spent fuel, history information related to burnup, and a normal value and a limit value of current condition information; an operation and determination unit configured to calculate the current condition information of the spent fuel by using the condition information detected by the detection unit and the configuration information and the history information stored in the input storage unit and configured to determine a risk level by comparing the current condition information with the limit value corresponding to the risk level; and a display unit configured to display the current condition information calculated by the operation and determination unit and configured to display the determined risk level.

Real time monitoring system of spent fuel pool and method thereof

The present invention relates to a method for preparing poly(organic oxidized silicon) particles having UV-absorbing groups, including reacting an organoalkoxysilane precursor having a UV-absorbing group selected from a group consisting of organotrialkoxysilane, diorganoalkoxysilane and a mixture thereof, in the presence of a base, with a silane compound selected from a group consisting of tetraalkoxysilane, alkyltrialkoxysilane, tetraalkoxysilane, aryltrialkoxysilane, dialkyldialkoxysilane, diaryldialkoxysilane, arylalkyldialkoxysilane and a mixture thereof, serving as a crosslinking regulator and UV stability enhancer, so as to prepare poly(organic oxidized silicon) particles selected from a group consisting of polysilsesquioxane, silsesquioxane-siloxane copolymer, silsesquioxane-silica copolymer, silsesquioxane-siloxane-silica copolymer and silsesquioxane-siloxane copolymer, having UV-absorbing groups. The poly(organic oxidized silicon) particles significantly solves the problem of poor UV stability, while maintaining UV absorption by the UV-absorbing group contained in the particles. Since the poly(organic oxidized silicon) particles having UV-absorbing groups do not exhibit white turbidity, they can be effectively used in cosmetics. In accordance with the present invention, the poly(organic oxidized silicon) particles having UV-absorbing groups can be prepared economically as compared to the existing methods.

Ultraviolet absorbing poly (organic oxidized silicon) particles having improved ultraviolet stability, and method for preparing same

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Daejeon, South Korea

Young Baek Kim