• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.6
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• pp.2118-2123
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• 2010

Korean individual occupational exposure control is focused on the retrospective service to the over-exposed person by the reading of personal dosimeter. Since the radiophamaceuticals using in the nuclear medicine department are uncontained radiation sources, the potential exposure at working environment is very high. Moreover, a patient remains radioactive for hours or even days after the administration of a radiopharmaceutical for diagnosis or treatment. Thus, the proper working environmental exposure control must be established and executed to protect not only the affiliated employees, but also guardians accompanying patients and temporarily visiting public from the exposure by the patients. Japanese radiation protection law regulates working environmental radiation exposure by regularly measuring and filing the environmental dose for years. This study was aimed at measuring working environmental radiation dose in the nuclear medicine department of an university hospital located in Daejeon, Korea. We measured the accumulation radiation dose in air at 8 locations in the nuclear medicine department by using the same method as in Japan with glass dosimeters. The highest dose rate, 0.23 mSv per month, was measured at the waiting room, and the second one is at reception desk. Even though the doses were lower than the Korean constraint dose rate (0.3 mSv/week) at the boundary of the radiation controlled area, it was over the dose limit of public (1 mSv/y) and environment (0.25 mSv/y). Conclusionally, it was found that the new or additional procedure was necessary to less the exposure dose to the receptionist and guardians by the environmental radiation dose in the nuclear medicine department.

• 대한방사선방어학회:학술대회논문집
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• 2009.11a
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• pp.226-227
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• 2009

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.6 no.4
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• pp.387-398
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• 2008

To obtain base-line data in the low- and intermediate-level radioactive waste disposal facility, radiological environment investigation is required at least two years prior to the facility operation near the disposal facility. The investigation has been performed since January 2007 for the Wolsong LILW disposal center. In this paper, investigation procedure and detailed information obtained for six months in 2008 are described. Based on the current results, future investigation planning is also discussed for the radiological environment management of the disposal facility.

• Journal of Radiation Protection and Research
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• v.35 no.1
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• pp.12-20
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• 2010

In a primary system at nuclear power plants (NPPs), various radionuclides including fission products and corrosion products are generated due to the complex water conditions. Particularly, $^3H,\;^{14}C,\;^{58}Co,\;^{60}Co,\;^{137}Cs,\;and^{131}I$ are important radionuclides in respect of dose assessment for radiation workers and management of radioactive effluents. In this paper, the dominant contributors of radiation exposure for radiation workers and the member of public adjacent to NPPs were reviewed and the process of dose assessment attributable to those contributors were introduced. Furthermore, the analysis for some examples of radiation exposure to radiation workers and the public during the NPP operation was carried out. This analysis included the notable precedents of internal radiation exposure and contamination of demineralized water occurred in Korean NPPs. Particularly, the potential issue about the dose assessment of tritium and carbon-14 was also reviewed in this paper.

• The Journal of the Korea Contents Association
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• v.16 no.8
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• pp.419-426
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• 2016

The research is done to analyze the change of personal dosimeter according to the elapsed times(24 hours, 1 week, 2 weeks, 3 weeks, 4 weeks) and magnetic field and find out the effective exposure treatment for radiation workers. At first, research the heat treatment and radiation of grouped TLD and keep them in different environments-exposed separately to observe the consequences of glow curve and the level of radiation exposure. As a result, we could find that 24 hours passing TLD group showed the difference in glow curve and the level of radiation. This can be considered as the change caused by magnetic exposure. Also the average radiation exposure level of TLD group, unexposed to the magnetic field, was 15.41 mSv. And the average radiation exposure level of TLD group, exposed to the magnetic field, was 14.83 mSv which decreased the biggest amount(3.80%) among the other groups. If a radiation worker, who works in PET-MRI room, uses TLD as a personal dosimeter, the level of real radiation exposure caused by exposure to the magnetic field won't change significantly as recorded at a regular record cycle but with not regular record but interim record, the lower exposure dose will be appeared than the real level of radiation.

• Proceedings of the KIEE Conference
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• 2003.07d
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• pp.2669-2671
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• 2003

본 논문에서는 변위 손상 현상을 이용하는 중성자 탐지소자와 선량계 모듈에 RF 통신 기능을 추가하여 방사선 환경 내에서 내 방사선화 된 로봇에 의해 가동 중인 원자력 밭전소등의 특정 부분에 대하여 실시간에 측정된 방사선량 데이터의 취득이 가능한 모듈을 개발하였다. 기존의 운용중인 발전소에 대한 방사선량은 휴지기간에 탐지소자를 설치하여 다음 휴지기간에 그 탐지소자를 가지고 나와 누적방사선량을 측정하거나, 설치된 탐지소자에서 유선으로 안전한 곳까지 데이터를 취득해 와서 그 값을 분석하여 왔으나, RF 통신 기능이 추가된 모듈은 내 방사선화 된 로봇에 탑재하여 로봇이 가동 중인 발전소 곳곳을 누비며, 설치된 탐지소자로부터 그 방사선량을 취득한 수 있다. 이는 기존의 취득방식에 비해 많은 부분 효율적인 측면이 있으며, 유지보수 비용의 절감을 가져 올 수 있을 것으로 기대된다. 본 연구에서는 RF 통신을 하기 위한 안테나 회로의 설계 기법과 취득한 정보를 EEPROM에 저장하고, 그 저장 데이터를 로봇에 부착된 Reader에 의해 읽을 수 있는 일련의 흐름을 구성하는데 있어 필요한 여러 가지 기술 혹은 기법에 대하여 살펴보았다.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2622-2624
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• 2004

본 논문은 원자력 발전소의 원자로 내 고준위 방사선 환경에서의 방사선량 측정에 SiC 다이오드를 이용하여 발생하는 펄스를 관측, 방사선량을 측정하는 기술에 대한 연구이다. 일반적으로 고준위 방사선 환경에서는 방사선측정 센서가 높은 방사선 에너지로 인해 손상되기 쉽다. 이러한 이유로 고준위 방사선 환경에서 내성이 강한 SiC 다이오드를 사용하였다. 방사선 입자를 하나의 에너지로 취급하면 방사선 입자가 센서로 입사하는 경우, 센서에는 방사선 에너지에 따라 약한 에너지가 유기된다. 유기된 에너지는 센서에서 전류의 형대로 출력되면, 이 전류를 신호처리하면 펄스의 형태로 성형이 가능하다. 시간당 성형된 펄스 수는 센서가 받은 방사선량에 비례하며 방사선이 많은 곳에서는 직류의 형태가 된다. 본 논문에서는 약한 전류형태로 출력되는 신호를 성형하여 디지털 신호처리를 하기 위한 펄스 형태로 성형하는데, 필요한 일련의 기술적인 사항에 관하여 연구하였다.

• Journal of radiological science and technology
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• v.30 no.4
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• pp.435-442
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• 2007

The number of thyroid diseases treated with radioiodine(I-131) is increasing steadily. The sharp increase in patients who require high dose radioiodine therapy greatly increased the need for new therapy rooms. Accordingly, interest in radiation exposure is rising as well, and is a major psychological stress factor for the patient and those who come in close contact with the patient. This study aimed to minimize the radiation exposure on discharge. Based on various previous reports, the decision for discharge should be individualized depending on many factors related to the patient's living or working environment. Educating patients repeatedly on the importance of sufficient oral hydration, while the adequate amount was relative to the patient's individual condition, greatly lowered the detected radiation measurement within the same admission period. In some cases, the period of admission could be abbreviated.

• Journal of the Korean Society of Radiology
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• v.11 no.3
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• pp.117-122
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• 2017

With the increase in leisure life, the population of ski resorts is rapidly increasing. The activity at the ski resort is likely to receive a direct chance of natural sunlight or space ray. Because it is located in the mountains where altitude exists. As a general rule, it is widely known that the higher the elevation rate, the more increasing the natural radiation dose. However, the natural radiation dose rate for the ski slopes has not been reported yet. Various ski resorts exist in Korea, but this study had chose 4 ski resorts to measure the natural dose of natural radiation. As a result, the natural radiation dose for the ski slope was measured at a relatively high dose of ordinary living areas. However, the level of natural radiation dose was not worrisome. It is recommended to wear ski wear or goggles to minimize natural radiation exposure at the ski slopes.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.876-879
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• 2012

In this paper we studied the radiation detection technology which described the radiation level distribution in high radiation area with remotely and safely. The designed radiation mapping system was composed of radiation nodes and radiation station. The radiation nodes could sense the radiation dose values with pMOSFET radiation sensors and transmit them to the radiation station. At the radiation station the received radiation values were merged with a geometric information and visualized at the virtual graphic location. For the functional verification of the above system, we attached the radiation nodes to each corner in our laboratory, executed the mapping tests, and confirmed the designed functions finally.