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Cheong, Jae-Hak
- Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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- v.4 no.4
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- pp.353-363
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- 2006
In order to evaluate the potential radiological risks for the reuse of the site after decommissioning of nuclear facilities, a mathematical model was developed and materialized into the Microsoft $Excel{\circledR}$ spreadsheets frame. A set of input parameter values was proposed, which is useful in the preliminary risk screening step before the detailed evaluation with the site-specific data. It appeared that the screening levels calculated by the present model was agreed with the derived concentration guideline limits resulted from RESRAD Ver.6.2 and the German dose criteria for releasing a nuclear site from regulatory control.
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Jeong, Kwan-Seong;Moon, Jei-Kwon;Lee, Kune-Woo;Hyun, Dong-Jun;Choi, Byung-Seon
- Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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- v.10 no.2
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- pp.87-96
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- 2012
With a view to determine a safe speed the limit of a manipulator arm, several experiments was performed with a multi-jointed manipulator in maintenance and decommissioning tasks of nuclear facilities. Under the simulated emergency conditions, which were generated with random combinations of manipulator arm speed, failure probability and failure type, response characteristics of human operators to various malfunctions of a manipulator arm were measured in terms of reaction time, number of false alarm, and number of misses. This paper demonstrated that failure type, manipulator axes and manipulator arm speed has significant effects on human reaction time. As a whole the reaction time was slightly increased with manipulator arm speed, which is showed somewhat different pattern due to failure type. The reaction time to an axis acting on a workpiece directly, which could flex and extend, was fastest and much more its standard deviation was small. Various factors which may affect safe speed were also described.
https://doi.org/10.7733/jkrws.2012.10.2.087 인용 PDF KSCI

Song, Jong Soon;Kim, Young-Guk;Lee, Sang-Heon
- Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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- v.13 no.1
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- pp.45-53
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- 2015
Since the commercial operation of Kori Unit #1 nuclear power plant(NPP) started in 1978, 23 units at present are operating in Korea. Radioactive wastes will be steadily generated from these units and accumulated. In addition, the life-extension of NPPs, construction of new NPPs and decontamination and decommissioning research facilities will cause radioactive wastes to increase. Recently, Korea has revised the new classification criteria as was proposed by IAEA. According to the revised classification criteria, low-level, very-low-level and exempt waste are estimated to about 98% of total disposal amount. In this paper, current status of overseas cases and disposal method with new classification criteria are analyzed to propose the most reasonable method for estimating the amount of decommissioning waste when applying the new criteria.
https://doi.org/10.7733/jnfcwt.2015.13.1.45 인용 PDF KSCI KPUBS HTML