Korea Atomic Energy Research Institute

Korea Hydro Nuclear Power Co., Ltd.

Jei-Won Yeon

Kyuseok Song

Jong-Yun Kim

Won-Ho Kim

In-Kyu Choi

Yong Joon Park

Sang Eun Bae

Euo-Chang Jung

Hye-Ryun Cho

Euo Chang Jung

Young-Hwan Cho

Sang Hyuk Jung

Hee-Jung Im

Yoon-Yeong Bae

Jinsung Jang

Hong-Joo Ahn

Jaesik Hwang

Myung Hee Yun

Taek-Jin Kim

Kyoung Kyun Park

An apparatus for filtering airborne radioactive iodine is provided. The apparatus includes a housing defining an interior space and comprising an inlet for receiving air and an outlet for discharging the air; and a composition placed in the interior space for trapping airborne radioactive iodine between the inlet and the outlet. The composition comprises one or more salts selected from the group consisting of an alkali metal chloride and an alkaline earth metal chloride. A method of filtering airborne radioactive iodine is further provided. The method includes providing the foregoing apparatus at a nuclear facility and blowing air to flow from the inlet to the outlet and contact the composition placed in the interior space, whereby airborne radioactive iodine is trapped in the interior space.

Iodine absorbent material containing salt and radioactive iodine removal system using the same

Disclosed is a coolant with dispersed neutron poison micro-particles, used in a supercritical water-cooled reactor (SCWR) emergency core cooling system. Since the neutron poison micro-particles are uniformly dispersed in the coolant of the emergency core cooling system for a long period time, their fluidity is not lowered even though the polarity of water is changed in a supercritical state. Therefore, the neutron poison micro-particles absorb neutrons produced from nuclear fission in a nuclear reactor core. Accordingly, the neutron poison micro-particles can be appropriately used as a means for controlling neutrons and stopping a nuclear reactor in the SCWR emergency core cooling system.

Coolant with dispersed neutron poison micro-particles, used in SCWR emergency core cooling system

System and method for detecting and/or predicting in a field the leakage of nuclear reactor coolant that may occur at the pressure boundary of the primary system of a nuclear reactor. The system and method for detecting the leakage of nuclear reactor coolant uses a laser induced emission spectrum. The leakage of coolant is detected by detecting boron (B), a main component of the coolant, in corrosive products generated at the nuclear reactor pressure boundary on the basis of laser spectroscopy. An embodiment of the system for detecting leakage of nuclear reactor coolant may include a laser generator, a laser focusing lens, an emission collector, and emission spectrum analyzer.

System and method for detecting leakage of nuclear reactor coolant using laser induced emission spectrum

The present invention relates to an electronic scale having an air pressure change compensation function, which can precisely measure the weight of an object to be weighed even in an environment in which air pressure changes moment by moment in an airtight space such as in a glove box. According to the present invention, there is provided an electronic scale having an internal air pressure measurement sensor, by which the function of correcting the weight of an object to be weighed is provided even in an environment in which air pressure changes such as in the glove box is provided, thus enabling the weight of a sample to be precisely measured even in an environment in which air pressure changes moment by moment.

Electronic scale having function of compensating for air pressure changes in glove box

A method of detecting impurities in a high-temperature aqueous solution and an apparatus of detecting impurities for the same. Specifically, the present invention provides a method of detecting impurities in a high-temperature aqueous solution comprising a reducing agent using an electrochemical water chemistry technology detecting the electrochemical current varied according to the degree in which the impurities in the high-temperature aqueous solution hinder the formation of an oxide film that is formed on a noble metal electrode, and an impurity detecting apparatus comprising a noble metal electrode, a counter electrode, and a device of applying the electrochemical potential and measuring the electrochemical current for the method of detecting impurities.

Method of detecting impurities in high temperature aqueous solution and apparatus of detecting impurities for the same

Disclosed herein is a reference electrode including an electrolyte containing an optically-active material, including: an electrode body provided at an end thereof with an electrolyte separation membrane and charged therein with an optically-active material and an electrolyte solution; an inner electrode disposed in the electrode body to be immersed in the electrolyte solution; and an absorbance measurement probe for transmitting light to the electrolyte solution and collecting reflected light waves, which is disposed in the electrode body to be immersed in the electrolyte solution. Since the concentration of an electrode reaction material, such as Cl, in the electrolyte is calculated using the absorbance of the electrolyte solution containing the optically-active material, the change in potential of the reference electrode can be properly corrected even when the reference electrode is exposed to a test environment for a long period of time and thus the concentration of the electrolyte changes. Thus, the functions of the reference electrode can be maintained for a long period of time, thereby rapidly monitoring the abnormal states caused by damage to the reference electrode.

Reference electrode including electrolyte containing optically-active material and automatic electrochemical potential correction apparatus using the same

The present invention relates to an apparatus and method for measuring the size of nanoparticles present in an aqueous solution as an infinitesimal quantity, and, more particularly, to a scheme that remotely measures the laser-induced breakdown of a fine nanoparticle using a probe beam in a non-contact manner, performs curve fitting on the symmetrical frequency distribution curve of the measured magnitude of a probe beam signal to form the shape of a Gaussian function, obtains calibration curves for the size of the nanoparticle from the peak and full-width at half-maximum thereof, and determines the size of an unknown nanoparticle from the calibration curves.

Apparatus for measuring magnitude of deflected probe beam signal generated by laser-induced breakdown and method of measuring size of nanoparticles using frequency distribution curve of magnitude of probe beam deflection signal

Disclosed is a method of in-situ monitoring a reduction process of uranium oxides by lithium metal, wherein a conversion yield of uranium metal from uranium oxides upon production of uranium metal through a reaction of uranium oxides (UO, x&#x2266;3) with lithium metal in the presence of a high-temperature molten salt is measured according to an electrochemical analysis based on an oxidation of an oxygen ion and a reduction of a lithium ion dissociated from lithium oxide obtained as a by-product of the reaction, by use of a measuring device composed of a potentiostat/galvanostat and a reactor provided with an anode and a cathode. The in-situ monitoring method of the current invention is advantageous in terms of fast and simplified measuring techniques, by directly measuring the reduction process of uranium oxides at the anode and cathode connected to the potentiostat/galvanostat in the presence of the high-temperature molten salt.

Growing community of inventors

Daejeon, South Korea

Jei-Won Yeon