Patents by Inventor Chul-Joo Park

Chul-Joo Park has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of measuring gadolinia content using inductively coupled plasma-atomic emission spectrometry
    Patent number: 8149398
    Abstract: A method of measuring a gadolinia content using inductively coupled plasma-atomic emission spectrometry is provided. The method can include grinding sintered gadolinium using a percussion mortar to obtain a ground sample; warming the ground sample and then dissolving it with an acid solution to obtain dissolved gadolinia; diluting the dissolved gadolinia with distilled water to obtain a diluted gadolinia solution; measuring mass of each of a uranium element and a gadolinium element in the diluted gadolinia solution by a unit of ppm using the inductively coupled plasma-atomic emission spectrometry; and calculating a molar fraction of gadolinium from the diluted gadolinia solution and then calculating the gadolinia content using the molar fraction of gadolinium.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: April 3, 2012
    Assignee: Korea Nuclear Fuel Co., Ltd.
    Inventors: Chan-Jun Park, Pil-Sang Kang, Chul-Joo Park, Bum-Sik Koh, Jun-No Lee, Hyoung-Joong Kim
  • METHOD OF MEASURING GADOLINIA CONTENT USING INDUCTIVELY COUPLED PLASMA-ATOMIC EMISSION SPECTROMETRY
    Publication number: 20110134424
    Abstract: A method of measuring a gadolinia content using inductively coupled plasma-atomic emission spectrometry is provided. The method can include grinding sintered gadolinium using a percussion mortar to obtain a ground sample; warming the ground sample and then dissolving it with an acid solution to obtain dissolved gadolinia; diluting the dissolved gadolinia with distilled water to obtain a diluted gadolinia solution; measuring mass of each of a uranium element and a gadolinium element in the diluted gadolinia solution by a unit of ppm using the inductively coupled plasma-atomic emission spectrometry; and calculating a molar fraction of gadolinium from the diluted gadolinia solution and then calculating the gadolinia content using the molar fraction of gadolinium.
    Type: Application
    Filed: March 25, 2010
    Publication date: June 9, 2011
    Inventors: CHAN-JUN PARK, Pil-Sang Kang, Chul-Joo Park, Bum-Sik Koh, Jun-No Lee, Hyoung-Joong Kim