• Nuclear Engineering and Technology
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• 제48권4호
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• pp.965-974
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• 2016

The article describes the results of experiments conducted on pigs to determine the effect of plutonium, which is the most radiotoxic and highly active element in the range of mixed fuel $(U_{0.8}Pu_{0.2})O_2$ fission products, on living organisms. The results will allow empirical prediction of the emergency plutonium radiation dose for various organs and tissues of humans in case of an accident in a reactor running on mixed fuel $(U_{0.8}Pu_{0.2})O_2$.

• 보건의료산업학회지
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• 제6권2호
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• pp.81-89
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• 2012

This research, which was conducted for student at department of dental hygiene, intended to measure the level of self-efficacy and consciousness on the use of radiation, knowledge and attitude on radiation safety management and got the following conclusions. This study was performed from May 8 to July 7, 2011 for 326 students who study at Department of Dental Hygiene of a three-year course in Busan areas. The result of as follows; 1. As a result of comparing the average of a sense of self-efficacy according to the characteristics of those surveyed, a statistically significant difference(p<0.01)(p<0.001) was found according to grade point average, subjective health condition. 2. As a result of comparing the average level of consciousness about radiation use according to the characteristics of those surveyed, a statistically meaningful difference(p<0.05)(p<0.01) was found according to grade, grade point average. 3. As a result of conducting a correlation analysis among self-efficacy, consciousness on the use of radiation, knowledge and attitude on RSM, the correlation of self-efficacy and consciousness, knowledge, and attitude was r=0.108, 0.203, 0.231 respectively, all of which was a plus correlation(p<0.01). we believe that a variety of programs should be offered to be capable of enhancing knowledge and attitude on RSM, self-efficacy.

• 한국의학물리학회지:의학물리
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• 제27권3호
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• pp.139-145
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• 2016

With the development in field of industry and medicine, new machines and techniques are being launched. Moreover, the complexity of the techniques is associated to an increasing risk of incident. Especially, a small error in radiotherapy can lead to a serious patient-related incident, risk management is necessary in radiotherapy in order to reduce the risk of incident. However, in field of radiotherapy, there are no legally binding clauses for risk management and there is an absence of risk management systems at an institutional level. Therefore, we analyzed institutional status of risk management, reporting & classification systems, and risk assessment & analysis in 31 countries. For risk management and reporting systems, 65% of countries investigated had legislation or regulations; however, only 35% of countries used classification systems. It was found that 43% more countries had legislation for risk management in healthcare than those for radiotherapy; 19% more countries had reporting systems for healthcare than those for radiotherapy. For classification systems, 60% more countries had legislation, recommendation, and guidelines in the field of radiotherapy than those for healthcare. Recently, international institutes have published several reports for risk management and patient safety in radiotherapy, owing to which, countries adopting risk management for radiotherapy will gradually increase. Before adopting risk management in Korea, we should precisely understand the procedures and functions of risk management, in order to increase efficiency of risk management because classification & reporting system and risk assessment & analysis are connected organically, and institutional management is needed for high quality of risk management in Korea.

• 한국의학물리학회지:의학물리
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• 제27권3호
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• pp.146-155
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• 2016

As the probability of exposure to radiation increases due to an increase in the use of radioisotopes and radiation generators, the importance of a radiation safety management field is being highlighted. We intend to help radiation workers with exposure management by identifying the degree of radiation exposure and contamination to determine an efficient method of radiation safety management. The personal exposure doses of the radiation workers at the Korea Institute of Radiological & Medical Sciences measured every quarter during a five-year period from Jan. 1, 2011 till Dec. 31, 2015 were analyzed using a TLD (thermoluminescence dosimeter). The spatial dose rates of radiation-controlled areas were measured using a portable radioscope, and the level of surface contamination was measured at weekly intervals using a piece of smear paper and a low background alpha/beta counter. Though the averages of the depth doses and the surface doses in 2012 increased from those in 2011 by about 14%, the averages were shown to have decreased every year after that. The exposure dose of 27 mSv in 2012 increased from that in 2011 in radiopharmaceutical laboratories and, in the case of the spatial dose rate, the rate of decrease in 2012 was shown to be similar to the annual trend of the whole institute. In the case of the surface contamination level, as the remaining radiation-controlled area with the exception of the I-131 treatment ward showed a low value less than $1.0kBq/m^2$, the annual trend of the I-131 treatment ward was shown to be similar to that of the entire institute. In conclusion, continuous attention should be paid to dose monitoring of the radiation-controlled areas where unsealed sources are handled and the workers therein.

• Journal of Korean Neurosurgical Society
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• 제61권3호
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• pp.386-392
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• 2018

Radiation therapy is highly effective for the management of pediatric malignant central nervous system (CNS) tumors including embryonal tumors. With the increment of long-term survivors from malignant CNS tumors, the radiation-related toxicities have become a major concern and we need to improve the treatment strategies to reduce the late complications without compromising the treatment outcomes. One of such strategies is to reduce the radiation dose to craniospinal axis or radiation volume and to avoid or defer radiation therapy until after the age of three. Another strategy is using particle beam therapy such as proton beams instead of photon beams. Proton beams have distinct physiologic advantages over photon beams and greater precision in radiation delivery to the tumor while preserving the surrounding healthy tissues. In this review, I provide the treatment principles of pediatric CNS embryonal tumors and the strategic improvements of radiation therapy to reduce treatment-related late toxicities, and finally introduce the increasing availability of proton beam therapy for pediatric CNS embryonal tumors compared with photon beam therapy.

• Journal of Radiation Protection and Research
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• 제28권2호
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• pp.137-143
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• 2003

Annual radiation dose limit to radiation worker was substantially lowered in Korea by the adoption of 1990 recommendations of the International Commission on Radiation Protection (ICRP 60) in its legislation. On the other hand, radiation management environment in nuclear power plants is getting more worse because of the accumulation of radiation sources inside the system and the frequent need for maintenance according as the operation years of nuclear power plants increase. Therefore, Korea Hydro & Nuclear power Co., Ltd. (KHNP) has established a long-term 10 years plan from 2001 to 2010 for the reduction of radiation dose to workers. The plan is aimed for the reduction of annual dose per unit averaged over 5 years from 0.9 man-Sv in 2001 to 0.75 man-Sv in 2010 by radiation source reduction, equipment/tool improvement or new equipment development for easy maintenance, and the improvement of administration and system.

• 대한방사선기술학회지:방사선기술과학
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• 제41권6호
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• pp.643-649
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• 2018

Recently, together with advancement of domestic aviation industry, overseas tourists using planes have been soared. This study aimed to investigate the risk of diseases for the passengers and flight attendants from the exposed cosmic radiation during the flight by domestic and international literature reviews, as follows. Airliners should develop the program to measure the actual radiation dose and prepare the portable devices for radiation measurement in flight to lower the accumulated dose of cosmic radiation by the attendants. Regulation should be prepared to check the exposed dose during the flight for the passengers by announcement of individual exposed radiation dose which has been provided only to the flight attendants. Passengers and flight attendants should recognize they are exposed to excessive cosmic radiation during the flight and civilians should be protected by the cosmic radiation when they use the flights, which should be prepared by the regulations.

• International Journal of Oral Biology
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• 제46권4호
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• pp.168-175
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• 2021

To investigate the perceptions and attitudes of dental hygienists toward radiation safety management in Korea. A total of 800 dental hygienists were randomly selected for an anonymous survey, and 203 of them participated. The questionnaire items included the following: sex, career period, type of installed radiographic equipment, recognition of the diagnostic reference level (DRL), participation in radiation safety education, and attitudes toward radiation protection for both patients and dental hygienists. The participants were divided into two groups according to their years of experience (< 10 years versus ≥ 10 years). The difference between the groups was investigated according to frequency distribution. Fisher's exact test or Pearson's chi-square (𝛘²) test was used as appropriate. A regression analysis was performed to investigate the impact of wearing a thyroid collar for personnel protection during patient radiation exposure. The types of installed radiographic equipment included panoramic radiography (96.1%), cephalometric radiography (76.9%), intraoral radiography (72.9%), and cone-beam computed tomography (69.5%). Significant differences were observed in the learning pathway for the DRL (Fisher's exact test, p < 0.05), satisfaction with radiation safety education (Pearson's 𝛘² test = 5.3975, Pr = 0.02), and use of personnel radiation monitoring systems (Pearson's 𝛘² test = 18.1233, Pr = 0.000) between the groups. Significant differences were also observed in personnel protection using a thyroid collar and patient protection during panoramic radiography (odds ratio = 14.2). Dental hygienists with more than 10 years of experience were more satisfied with radiation safety education and more interested in radiation monitoring. Considering career experience, customized, continuous, and effective radiation safety management education should be provided.

• 한국전자통신학회논문지
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• 제13권6호
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• pp.1145-1154
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• 2018

주파수의 혼신 간섭 방지를 위해 실제 공중에 방사되는 복사전력 중심으로 규제기준 전환이 요구된다. 복사전력 규제는 기술기준, 허가, 검사 등 전파관리 전반에 관련되는 사항이므로 적용 용이성, 시급성 등을 고려해 점진적으로 도입하고, 주요국의 복사전력 관련 법제도 현황 조사를 통해 국내 환경에 적합한 복사전력 방식에 따른 측정, 검사, 인증 등의 무선설비 출력관리 방식을 마련한다. 국내는 현재 안테나 공급 전력의 비중이 높고, 유럽의 경우는 복사전력의 비중이 높음. 향후 무선국의 수가 점점 증가하고 다양해지므로 공간 관리인 복사전력 기반을 병행하여 측정이 가능하도록 제도개선 마련 필요하고, 복사전력 관리체계로 전환하기 위해서는 관련 전파 제도(기술기준, 인증, 무선국 검사, 사후 관리 등)에 대한 제도개선 필요하다.

• 한국방사선학회논문지
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• 제6권3호
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• pp.159-166
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• 2012

본 연구의 목적은 방사선의 사업적 이용에 따른 방사선발생장치 또는 방사성동위원소 등(이하 방사성동위원소 등)을 운용하는 방사선작업종사자를 대상으로 방사선안전관리와 관련된 지식의 설문 조사하고 이를 체계적으로 추이분석 함으로서 방사선 이용시설 등의 방사선안전 문화를 정착시키기 위함에 있다. 연구 방법은 2011년 08월 01일 부터 09월 05일 까지 861 명의 방사선 종사자를 대상으로 설문 조사를 하였다. 분석 방법으로 설문 응답자의 일반적인 특성과 기관정보는 빈도 분석을 하였으며 방사선안전관리에 대한 지식 수준은 평균과 표준편차를 구하여 각각 비교하였다. 분석 결과 작업 종사자의 방사선 안전 관리에 대한 지식 조사에서는 종사자 모두 높은 수준으로 평가 되었다. 결론적으로 방사선 작업종사자들의 방사선 안전관리와 관련하여 보다 다양한 요인들에 대한 연구들이 수행되어야 하며 작업종사자들의 의식을 높이기 위해서 시기적절한 교육이 필요할 것으로 사료되며, 지속적으로 방사선 작업종사자들을 관리함으로써 효율적인 방사선이용이 될 수 있는 기반이 확립될 것으로 사료된다.