Lessons Learned from 10 Years' Experience of the Centralized Calibration Laboratory for the Management of Portable Radiation Instrument

These radiation instruments are calibrated every six months in accordance with KOLAS(Korea Laboratory Accreditation Scheme) accreditation requirements. The CRI possesses the most up-to-date gamma, neutron, beta irradiators, and X-ray generators. Recently the CRI has developed OCR calibration kits which enable more convenient and reliable calibration. This paper analyzes the types of maintenance work carried out on portable radiation instruments for nuclear power plants, as well as the inadequacies experienced in KHNP-CRI since 2010 when the CRI began its integrated calibration. With a view to improving the reliability of the nuclear power plant radioscope calibration and increasing work efficiency, CRI has centralized to one calibration room previously scattered across nuclear power site. Thus, CRI has achieved its goals as a KOLAS calibration agency: to ensure consistency in calibration and reduce maintenance and repair costs, among others. Necessary preparation tasks should include training and maintaining technical professionals in calibration, calibration technology development, and development of such technology as decommissioning-focused measurement equipment.