• 방사성폐기물학회지
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• 제6권4호
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• pp.369-385
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• 2008

부지감시 및 조사의 목적은 운영 전, 운영중 및 폐쇄 후 단계에서 변화가 예상되는 주요 부지특성을 지속적으로 감시함으로써 방사성폐기물처분장의 성능평가 및 설계에 필요한 기초자료를 제공하는 것이다. 부지감시의 단계별 주요내용은 다음과 같다. 운영전 단계에는 부지의 적합성 평가 및 처분장 건설과 운영에 필요한 주요 부지특성을 감시하며, 운영 중 단계에는 안전하고 효율적인 운영과 환경에 미치는 영향을 판단하기 위하여 주변지역을 포함하여 주요 부지특성을 감시한다. 폐쇄 후 단계에는 처분장의 방사성 물질로 인한 영향을 사전에 예방하고, 처분장의 장기적 안전성을 위하여 필요한 주요 부지특성 항목을 감시한다.

• Nuclear Engineering and Technology
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• 제35권2호
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• pp.108-120
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• 2003

In assessing the long term post closure radiological safety assessment of a potential HLW repository in Korea, three categories of uncertainties exist. The first one is the scenario uncertainty where series of different natural events are translated into written statements. The second one is the modeling uncertatinty where different mathematical models are applied for an identical scenario. The last one is the data uncertainty which can be expressed in terms of probabilistic density functions. In this analysis, three different scenarios are seleceted; a small well scenario, a radiolysis scenario, and a naturally discharged scenario. The MASCOT-K and the AMBER, probabilistic safety assessment codes based on connection of sub-modules and a compartment theory respectively, are applied to assess annual individual doses for a generic biosphere. Results illustrate that for a given scenario, predictions from two different codes fairly match well each other But the discrepancies for the different scenarios are significant. However, total doses are still well below the guideline of 2 mRem/yr. Detailed analyses with model and data uncertainties are underway to further assure the safety of a Korean reference dispsoal concept.

• Nuclear Engineering and Technology
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• 제55권11호
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• pp.4083-4095
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• 2023

Currently, various research institutes in Korea are conducting research to develop a safety case for deep geological repository for high-level radioactive waste (HLW). In the past, low and intermediate-level waste (LILW) was approved by a regulatory body by performing a post-closure safety assessment, but HLW has different disposal characteristics and safety objectives are different. Therefore, in the case of HLW, safety assessment should be performed based on these changed conditions, and specific procedures are also under development. In this paper, the regulatory status of prior research institutes, feature, event and process (FEP) and scenario development cases were investigated for well-organized FEP and scenario development methodologies. In addition, through the results of these surveys, the requirements and procedures necessary for the FEP and scenario development stage during the safety assessment of repository for HLW were presented. These review results are expected to be used to identify the overall status of previous studies in conducting post-closure risk assessment for HLW repository, starting with identifying regulatory requirements, the most basic element.

• 방사성폐기물학회지
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• 제6권4호
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• pp.329-346
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• 2008

중저준위 방사성폐기물의 영구처분을 위하여 건설되는 월성원자력환경관리센터의 1단계 폐쇄후 안전성평가에 대하여 기술하였다. 처분시설의 건설운영허가를 위하여 작성된 안전성평가에 대하여 평가개요, 처분시설의 폐쇄개념, 처분부지에 대한 지하수 유동특성을 이용하여 평가를 위한 시나리오의 개발과정과 도출된 평가대상 시나리오에 대한 개념을 기술하였다. 폐쇄후 안전성평가 모델링을 위한 평가도구, 입력인자와 개별 시나리오에 대한 핵종누출 모델링, 기체발생 및 기체이동 모델링, 인간침입 모델링과 생태계 모델링에 대하여 기술하였다. 처분시설의 폐쇄후 안전성 평가시나리오에 대하여 국내 규제치를 만족하는 것으로 평가되었으며 향후 처분시설 안전성에 대한 불확실성 저감과 신뢰성 증진을 위한 노력을 지속적으로 수행할 예정이다.

• Journal of Chest Surgery
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• 제31권5호
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• pp.540-543
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• 1998

본 례는 65세 남자 환자에서 전폐절제술후에 발생한 기관지 늑막루 및 농흉의 치험례로 일차적으로 만성화하게한 다음 정중흉골절개하 심낭절개로 좌 주기관지를 노출후 자동봉합기(TA 4.8-30)로 좌 주기관지를 이중 결찰 봉합하여 좌측 늑막강내의 염증을 일으키는 원인인 기관지 늑막루를 차단한 다음, 늑막강내의 농흉을 치료함에 있어 흉강경을 이용하여 변형된 Clagett술식으로 내면을 깨끗하게 세척한 후 민감한 항생제를 이용하여 늑막강을 채우고 흉강삽관을 뽑고 그 부위를 봉합하는 방법을 시행하여 잔존 농흉강을 폐쇄하였다.

• Journal of Chest Surgery
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• 제49권2호
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• pp.138-140
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• 2016

Broncho-pleural fistula (BPF) and esophago-pleural fistula (EPF) after pulmonary resection are challenging to manage. BPF is controlled by irrigation and sterilization, but such therapy is not sufficient to promote closure of EPF, which usually requires surgical management. However, it is generally difficult to select an appropriate surgical method for closure of BPF and EPF. Here, we report a case of concomitant BPF and EPF after left completion pneumonectomy, in which both fistulas were closed through a right thoracotomy.

• Journal of Chest Surgery
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• 제25권6호
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• pp.593-597
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• 1992

The bronchopleural fistula[BPF] due to bronchial stump disruption after pneumonec-tomy has remained one of the most dreadful complications to now. The management of the BPF with empyema thoracis are still therapeutic dilemma even though a various surgical methods for the control of BPF with or without empyema thoracis. We have experienced the successful treatment of BPF & empyema thoracis with transsternal transpericardial approach. The patient was a 54 years old male who was taken left pneumonectomy at W. Medical Center at sept, 19th. 1991. He was suffered from the BPF R empyema thoracis and so was transferred to our hospital at Nov. 19th. 1991. We treated the patient with transsternal transpericardial bronchial closure for BPF, and put clagett procedure for empyema thoracis in 2 weeks. We think this kind of surgical techniques is one of the relatively simple and effective method for the control of BPF and empyema thoracis.

• 음성과학
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• 제14권3호
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• pp.7-19
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• 2007

The present study investigated some phonetic attributes which distinguish two Korean stop types $^-aspirated$ and $lax^-$ in a prosodic position which has previously received little attention, namely medial in an accentual phrase. The intonational pattern across syllables which are initial in an accentual phrase (Jun, 1993) is said to depend on the type of stop (aspirated or lax), while that of syllables which are medial in an accentual phrase are not. In Experiment 1, nine native Korean speakers read sentences with a controlled prosodic pattern in which aspirated or lax stops occurred in accentual phrase-medial position. Acoustic analysis revealed significant differences between aspirated and lax stops in closure duration, voice-onset time, and fundamental frequency (F0) values for post-stop vowels. The results indicate that a wider range of acoustic cues distinguish aspirated and lax Korean stops than previously demonstrated. Phonetic and phonological models of consonant-tone interactions for Korean will need to be revised to account for these results.

• 한국지하수토양환경학회지:지하수토양환경
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• 제21권2호
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• pp.22-28
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• 2016

In order to evaluate landfill stabilization based on organic carbon, stoichiometric analysis and a biological methane potential (BMP) test based on modeling were performed at the 2^nd Sudokwon Landfill Site. Mass balance analysis through a BMP test proved to be more adaptable for evaluation, and it showed that 28.9% of landfill organic carbon was expected to remain by 2046, 30 years after landfill closure. The organic carbon ratio of total landfill waste for 2046 is forecasted as 2.9% in demolition waste and 5.1% in household waste, and, if one were to consider plastic as an organic waste, the ratios would increase to 15.9% and 28.3%, respectively. Therefore, it seems that organic matter biodegradation facilitating measures such as bioreactor landfill technology and preemptive recovery of combustible waste are necessary to shorten post closure management periods and to meet the landfill stabilization guidelines more safely.

• Journal of Chest Surgery
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• 제28권9호
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• pp.857-860
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• 1995

In a 53-year old male with post-infarction ventricular septal defect [VSD , owing to an acute exacerbation of pulmonary edema, respiratory failure developed, and the ventilatory support and intraaortic balloon counterpulsation [IABP were applied. At the following day, operation was performed with the aid of IABP. Under the cardioplumonary bypass, he underwent infarctectomy, trimming of VSD margin, patch closure of VSD and infarctectomy site. Left ventricular free wall rupture was detected during operation, which was confined with pericardial adhesion. Post-operative course was uneventful, and he could be discharged with minimal degree of dyspnea [NYHA class II .