• Journal of Radiation Protection and Research
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• 제38권3호
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• pp.149-156
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• 2013

최근 국내 방사선이용기관 수의 증가와 시설의 다양한 투자로 운영 및 안전관리가 복잡해지고 있다. 그러나 작업종사자 수와 방사선 시설증가에도 불구하고 방사선안전관리자 인력은 증가되지 않고 있는 실정이며, 소수의 방사선안전관리자에 의해 방사선작업종사자 등록 및 관리, 선원관리, 방사선량 감시, 배기 및 배수 등의 많은 업무가 관리되고 있다. 이러한 문제점은 방사선 사고발생의 직 간접적인 사고의 원인이 되고 있다. 본 연구에서는 방사선을 이용하는 시설의 효율적인 안전관리와 사고예방을 위한 방사선안전관리 업무절차를 도식화(Process Mapping)하였다. Process Mapping 개발을 위해 방사선안전관리 현안요건을 분석하고, 개별 절차상의 업무분석을 통해 방사선안전관리 체계를 정비하였다. 개발한 Process Mapping을 바탕으로 각 기관에 적합한 업무절차의 흐름을 명확히 구성함으로써 방사선을 이용하는 시설의 안전 위해 요인을 줄이고 방사선안전관리 체계를 개선할 수 있으며, 필요에 따라 Process Mapping을 수정보완하여 방사선안전관리에 효과적으로 사용할 수 있다.

• 방사선산업학회지
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• 제11권3호
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• pp.123-130
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• 2017

Concerns about high radiation exposure to the hands of radiation workers who may contact with radioactive contamination on surfaces in a nuclear power plant (NPP) had been raised, and the Korean regulatory body required the extremity dose estimation during contact tasks with radioactive materials. Korean NPPs conducted field tests to identify the incident radiation to the hands of radiation workers who may contact with radioactive contamination during maintenance periods. The results showed that the radiation fields for contact tasks are dominated by high energy photons. It was also found that the radiation doses to the hands of radiation workers in Korean NPPs were much less than the annual dose limits for extremities. This approach can be applicable to measure and estimate the extremity dose to the hands of medical workers who handle the radioactive materials in a hospital.

• Journal of Radiation Protection and Research
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• 제28권2호
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• pp.127-135
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• 2003

The primary contributors to the total occupational radiation exposure in operating nuclear power plants are operation and maintenance activities doting refueling outages. The Advanced Power Reactor 1400 (APR1400) includes a number of design improvements and plans to utilize advanced maintenance methods and robotics to minimize the annual collective dose. The major radiation exposure reduction features implemented in APR1400 are a permanent refueling pool seal, quick opening transfer tube blind flange, improved hydrogen peroxide injection at shutdown, improved permanent steam generator work platforms, and more effective temporary shielding. The estimated average annual occupational radiation exposure for APR1400 based on the reference plant experience and an engineering judgment is determined to be in the order of 0.4 man-Sv, which is well within the design goal of 1 man-Sv. The basis of this average annual occupational radiation exposure estimation is an eighteen (18) month fuel cycle with maintenance performed to steam generators and reactor coolant pumps during refueling outage. The outage duration is assumed to be 28 days. The outage work is to be performed on a 24 hour per day basis, seven (7) days a week with overlapping twelve (12) hour work shifts. The occupational radiation exposure for APR1400 is also determined by an alternate method which consists of estimating radiation exposures expected for the major activities during the refueling outage. The major outage activities that cause the majority of the total radiation exposure during refueling outage such as fuel handling, reactor coolant pump maintenance, steam generator inspection and maintenance, reactor vessel head area maintenance, decontamination, and ICI & instrumentation maintenance activities are evaluated at a task level. The calculated value using this method is in close agreement with the value of 0.4 man-Sv, that has been determined based on the experience aid engineering judgement. Therefore, with the As Low As Reasonably Achievable (ALARA) advanced design features incorporated in the design, APR1400 design is to meet its design goal with sufficient margin, that is, more than a factor of two (2), if operated on art eighteen (18) month fuel cycle.

• Journal of Radiation Protection and Research
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• 제39권2호
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• pp.103-108
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• 2014

Following the emergency work in Fukushima Daiichi nuclear power plant, more attention was paid for the radiation protection of workers working under severe accident condition. The protection procedure for the emergency workers, including the on-site emergency center, the seismic isolated building and the reestablishment of the radiation protection framework were analyzed to investigate drawbacks and deficiencies which led to adverse effects on the emergency planning and on emergency workers' health and comfort. Those drawbacks were identified and studied, and then suggestions were made to enhance the emergency working condition to avoid any future problems during severe accident emergency work and management.

• 의료법학
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• 제22권3호
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• pp.97-124
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• 2021

의료기관에는 진단용 방사선 발생장치를 취급하는 방사선사, 의사, 치과의사, 치과위생사 등 방사선 관계 종사자가 있다. 그리고 간호사, 간호조무사 등 방사선진료를 보조하거나 방사선 검사실로 환자이송 등을 하는 업무 보조자들이 있다. 방사선 관계 종사자는「의료법」 등에 의해 방사선 피폭관리가 이루어지고 있으나 방사선 진료업무 보조자 등은 이에 대한 법적 근거가 없는 실정이다. 또한 진단용 방사선 피폭관리는 의료법령에 의해 규율되고 있고, 치료용 방사선과 핵의학검사에 의한 방사선 피폭관리는「원자력안전법」의 규율을 받고 있다. 이에 진단용 방사선에 의한 피폭관리를 개선하기 위하여「의료법」 상 진단용 방사선 피폭관리에 관한 규정과「원자력안전법」 상 관련 규정들을 비교·검토하여 보았다. 그 결과로 얻은 주요 내용은 다음과 같다. 첫째, 진단용 방사선에 의한 피폭관리 대상으로 방사선 관계 종사자 외에 방사선 피폭 우려가 있는 간호사, 간호조무사, 임상실습 학생 등을 포함시켜 입법적으로 해결할 필요가 있다. 둘째,「원자력안전법」에서처럼 진단용 방사선 관계 종사자가 임신이 확인된 경우에는 피폭선량 한도를 명문으로 규정해야 한다. 셋째,「진단용 방사선 발생장치의 안전관리에 관한 규칙」의 개인피폭선량계의 종류에 관한 규정을 현실에 맞게 개정할 필요가 있다. 넷째, 방사선 관계 종사자, 방사선작업종사자와 수시출입자에 대한 건강진단의 검사항목은 동일해야 할 것으로 보인다. 다섯째, 의료기관에서 진단용 방사선뿐만 아니라 치료용 방사선과 핵의학을 포함한 의료용 방사선 전체를 하나의 법체계에서 통일하여 규율하는 것이 필요하다고 본다.

• 방사선산업학회지
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• 제9권1호
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• pp.47-55
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• 2015

Research and investigation is required for the exposure dose of radiation workers to work in the dental hospital as increasing interest in exposure dose of the dental hospital recently accordingly, study aim to minimize radiation exposure by making a follow-up study of individual exposure doses of radiation workers, analyzing the status on individual radiation exposure management, prediction the radiation disability risk levels by radiation, and alerting the workers to the danger of radiation exposure. Especially given the changes in the dental hospital radiation safety awareness conducted the study in order to minimize radiation exposure. This study performed analyses by a comparison between general and dental hospital, comparing each occupation, with the 116,220 exposure dose data by quarter and year of 5,811 subjects at general and dental hospital across South Korea from January 1, 2008 through December 31, 2012. The following are the results obtained by analyzing average values year and quarter. In term of hospital, average doses were significantly higer in general hospitals than detal ones. In terms of job, average doses were higher in radiological technologists the other workes. Especially, they showed statistically significant differences between radiological technologists than dentists. The above-mentioned results indicate that radiation workers were exposed to radiation for the past 5 years to the extent not exceeding the dose limit (maximum $50mSv\;y^{-1}$). The limitation of this study is that radiation workers before 2008 were excluded from the study. Objective evaluation standards did not apply to the work circumstance or condition of each hospital. Therefore, it is deemed necessary to work out analysis criteria that will be used as objective evaluation standard. It will be necessary to study radiation exposure in more precise ways on the basis of objective analysis standard in the furture. Should try to minimize the radiation individual dose of radiation workers.

• 한국산업보건학회지
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• 제25권1호
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• pp.27-35
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• 2015

Objectives: To investigate safety and health management, conditions in factories or facilities handling radiation-generating devices and radioactive isotopes were reviewed in terms of regulations of radiation safety control in Korea. Radiation exposure levels generated at those facilities were directly measured and evaluated for establishing an effective safety and health management plan. Methods: Government organizations with laws and systems of radiation safety and health were investigated and compared. There are three laws governing radiation-related employment such as occupational safety and health acts, nuclear safety acts, and medical service acts. We inspected 12 workplaces as research objects:four workplaces that manufacture and assemble semiconductor devices, three non-destructive inspection workplaces that perform inspections on radiation penetration, and five workplaces in textile and tire manufacturing. Monitoring of radiation exposure was performed through two methods. Spatial and surface monitoring using real-time radiation instruments was performed on each site handling radiation generating devices and radioactive isotopes in order to identify radiation leakage. Results: According to the occupational safety and health act, there is no legal obligation to measure ionizing radiation and set dose limits. This can cause confusion in the application of the laws, because the scopes and contents are different from each other. Surface dose rates in radiation generating devices such as implanters, thickness gages and accelerators, which were registered according to nuclear safety acts, using surveymeters, and seven of 36 facilities(19.4%) exceeded the international standards for surface radiation dose of $10{\mu}Sv/hr$. Conclusions: The results showed that occupational health and safety acts require a separate provision for measuring and assessing the radiation exposure of workers performing radiation work. Like noise, ionizing radiation will also periodically be controlled by including it in the object factors of work-environment measurement.

• 한국방사선학회논문지
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• 제17권2호
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• pp.277-284
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• 2023

작업환경에 따라 방사선학적 위험성이 상이하므로 해당 업종 환경에 대한 분석을 통해 방호 수단과 정책을 개발해야 한다. 방사선을 이용하는 업종 분야에서의 특성을 평가하는 것은 해당 업종의 수치만을 보는 것이 아니라 다른 업종과의 비교 분석을 통해 수행되어야 한다. 본 연구는 업종별 방사선 피폭 기록 비교를 위해 부처별 종사자 피폭 기록으로부터 평가 인자를 도출하고 이를 상대적으로 평가할 수 있는 다각형 모델을 개발하여 8개 방사선 이용 업종에 대해 적용하였다. 2020년 방사선 피폭 기록을 바탕으로 다각형 모델을 적용하여 방사선 업종의 피폭 기록을 기반으로 특성을 비교 평가하였다. 이를 통해 다각형 모델의 유용성을 확인하였으며 업종에 대한 방호 정책 방안을 제안하였다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.1884-1887
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• 1997

The increasing concern over radiation exposure in the nuclear industry has fostered agrressive efforts to reduce the levels of radiation exposure. One area of the effot to reduce the radiation exposure is the development of a remote radiation monitoring system. Remote radiation monitoring can serve many benificaial functions reduce exposure to radiation by plant personnel, impruve the quality of the data that is collected and recognize the radiation environment easily. Radiation mapping system gives a good information that represents radiation level distribution. The system we have developed consists of a data acquistion parts, mobile robot and remote control parts. Data acquisition parts consist of radiation detection module and vision acquistion module which collect radiation data, visiion data and distance information. In remote control parts, the acquision data are processed and displayed. We have constructed radiation mapping image by overlaying the vision and radiation data. The radiation mapping techniques for displaying the results of the survey in an easily comprehendable form will facilitate a better understanding of the radiation environment in the facility. This system can reduce workers radiation exposure and aid to help work plan, so it has significant benifits in cost and safety.

• 핵의학기술
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• 제16권1호
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• pp.50-56
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• 2012

일시 출입자로 분류된 핵의학과 출입 환경미화원은 주기적으로 타과와 업무순환을 하고, 또한 작업 시간과 환경 등의 변화가 많기 때문에 관리하기에 어려운 점이 있으며 따라서 이들의 분류를 명확히 할 필요가 있다. 이에 본 논문에서는 핵의학과에서 근무하는 환경미화원의 피폭 상황을 분석하여 일시 출입자로 분류된 조건의 타당성에 대하여 검토해 보고 작업 환경의 변화 및 근무 시간의 조절이 필요한가를 알아보았다. 우선 먼저 PET실과 혈액 검사실에서 근무하는 환경미화원과 감마 카메라실에서 근무하는 환경 미화원 2명을 대상으로 한 달간 근무 시간 중에 OSL을 각각 착용시켜 개인 피폭 선량을 측정하였다. 둘째로 survey meter를 이용하여 두 명의 환경미화원의 작업 환경, 근무 형태에 따라 시간대 별로 핵의학과 내 14개 구역을 선정, 총 10회 공간 선량률을 측정한 결과 이들의 피폭 선량은 연간 1mSv를 초과하지 않았으며, survey meter를 이용하여 조사한 결과 또한 연간 1 mSv를 초과하지 않을 것으로 추정되지만 그 수치가 1 mSv에 근접하였다. 따라서 일시 출입자로써의 분류를 좀 더 명확히 하기 위해서는 PET 안정실과 같은 피폭이 상대적으로 많은 구역에서의 노출 확률을 줄이기 위하여 이들에게 방사선 관리 구역내 교육을 실시하고, 또한 근무시간 및 근무 형태를 적절히 변경한다면 이들의 피폭 선량은 확연히 줄어들 것으로 사료된다.