• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2012.04a
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• pp.125-128
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• 2012

국내 가동원전에서는 내화방벽 관통부의 성능이 적절하게 유지되도록 주기점검절차, 데이터베이스 등 발전소 상황에 적합한 관리방안을 수립하여 운영하고 있다. 이 중에서 내화방벽 관통부 유지관리용으로 구축된 데이터베이스는 관통부 유지관리에 필요한 필수정보가 수록되어 있으나 관통부 담당자의 개인 관리도구로 활용되고 있으므로 실효성 향상이 필요하다. 본 논문에서는 이러한 점을 보완하기 위하여 발전소 구조물, 관통부 등의 3차원 형상정보(3-dimensional Plant Model)를 활용하여 시각적인 관리 편의를 향상시키고, 웹 기반(Web-based)의 관통부 정보 구축을 통하여 발전소 수준(Plant-level)에서 관리가 가능한 관통부 관리시스템 개발 사례를 기술하였다.

• Fire Science and Engineering
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• v.20 no.4 s.64
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• pp.98-104
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• 2006

The Fire Protection Regulatory documents require the fire-resistive rating of fire barrier penetration seals be same as that of fire barriers. Pilot application of penetration seal evaluation for K nuclear plant, built before penetration seal requirements were made, was done. In this evaluation, visual inspection and estimating fire rating by comparing installed configuration with tested configuration of penetration seals, called bounding approach method, were applied. Further improvements for retrofit and maintenance are recommended with penetration seal evaluation results also. The practical use of the methodology adopted in this study and the evaluation result of K nuclear plant will be anticipated for other plant's penetration seal evaluation.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.42 no.6
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• pp.775-786
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• 2022

In the plant structures including nuclear power plants, penetrations are frequently installed in walls and slabs to reinforce facilities during operation, and reinforcing bars are sometimes cut off during concrete coring. Since these penetrations are not considered at the design or construction stage, cutting of reinforcing bar during opening installation is actually damage to the structure, structural integrity evaluation considering the stress transition range or effective width around the new penetration is necessary. In this study, various nonlinear analyses and static loading experiments are performed to evaluate the effect of reinforcing bar cutting that occurs when a penetration is newly installed in the shear wall of wall-type building of operating nuclear power plant. In addition, the decrease in wall stiffness due to the installed new penetration and cutting of reinforcing bars is evaluated and the stress and strain distributions of rebars around penetration are also measured.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.10a
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• pp.207-210
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• 2010

원자력발전소 화재방호 규정이 제정되기 이전에 설계되어 방화벽 관통부 내화성능 인증자료가 미흡하였던 국내 일부 가동원전들은 최근 성능인증이 완료되었거나 진행 중이다. 성능인증이 완료된 방화벽 관통부는 발전소 운영기간 동안 요구성능이 유지되도록 적합한 관리방안이 필요하다. 본 논문에서는 성능인증이 완료된 가동원전을 대상으로 방화벽 관통부 관리현황의 적합성을 평가하고 관리방법 및 절차를 향상시키기 위한 향후 과제를 제안하였다.

• Fire Science and Engineering
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• v.18 no.4
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• pp.93-102
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• 2004

The function of fire barrier penetration sealing is highly important to confine a fire propagation a fire severity within a fire area where the fire started. Especially for the penetration seals at the nuclear power plants with the long-term operated history, it is needed to make it clear that the conformance to the sealing requirements has been proven to guarantee the fire-resistive performance of fire barrier penetration parts. If there are any parts of fire barrier penetration sealing which can not meet the required rating for the fire endurance performance, the relevant parts must be modified to meet regulatory requirements. At this paper, the engineering analysis methodology was established to approximate the fire endurance rating for the fire barrier penetration seals. With this study, the method of engineering analysis to decide fire endurance rating for the fire barrier penetration seals was established and this way can be utilized to check the performance of the fire rating for the penetration seal at the domestic nuclear power plants.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.10a
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• pp.37-41
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• 2010

스프링클러설비와 방화구획 구성요소는 화재시 매우 중요한 역할을 한다. 그러나 기존에 15층이하 아파트는 스프링클러설비가 없어 화재시 방화구획에 의존해야 되는데 방화구획 관련 설계, 시공, 감리가 미비하여 화재에 쉽게 노출되어 있다. 설비슬리브, 전선관, 덕트등이 방화구획으로 되어 있는 부분을 관통하는 경우 그틈을 시멘트모르타르나 기타 불연재료로 메우도록 규정하고 있으나 화재발생시 관통부를 메운 재료의 내화성능 부실, 균열, 탈락 등으로 화재안전성이 떨어진다. 현장에서의 설계, 시공, 감리등 대응하는 자세가 너무 허술하다. 설계에 방화댐퍼, 관통부 틈새의 내용이 반영 되지 않고 건축, 기계, 전기, 통신, 소방등 각 분야의 허가 도면에 도장이 날인되어 나타난다. 시공자는 잘못된 설계도면을 가지고 허가 도면이라며 도면되로 시공한다. 또한 실리콘, 우레탄폼등을 방화구획 관통부 틈새에 주입하며, 작업자도 비숙련자로서 개념도 없이 방화용실란트와 우레탄폼을 혼용해가며 작업을 한다.

• Nuclear Engineering and Technology
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• v.25 no.1
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• pp.80-90
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• 1993

Radiation streaming through penetrations has been of great concern in radiation shielding design and analysis. This study developed a Monte Carlo method and constructed a data library of results calculated by the Monte Carlo method for radiation streaming through a straight cylindrical duct in concrete walls of a broad, mono-directional, mono-energetic gamma-ray beam of unit intensity. It was demonstrated that average dose rate due to an isotropic point source at arbitrary positions can be well approximated using the library with acceptable error. Thus, the library can be used for efficient analysis of radiation streaming due to arbitrary distributions of gamma-ray sources.

• Tunnel and Underground Space
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• v.23 no.2
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• pp.87-98
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• 2013

Around 70% of Korea is mountainous, an increase in tunnel construction. It's due to the growing interest of the public for the environment and land required for the road construction is very scarce. During construction of 'Daedong 1 tunnel' in the expressway expansion project between Naengjeong and Busan, there are shallow shaft due to this tunnel located in the valley and the shafts are separated, and penetrating location change was inevitable for construction was delayed because of complaint. So, we change the position of the penetrating by applying multi-channel TSP, and conducted a stability analysis. The analysis results showed that there is no problem on the stability of the tunnel. To secure the construction of additional stability, We installed instrument, performed mechanical excavation, added reinforcement at shallow shaft and conducted bench cut.

• Journal of the Korean Professional Engineers Association
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• v.32 no.6
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• pp.86-93
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• 1999

원자력 발전소 격납 용기의 누설시험 방법들은 3가지 유형으로 나타난다. 그것들은 A형, B형 그리고 C형 시험들이다. 본 누설시험의 시험 대상과 절차에 관한 해설을 실었다. 이 글과 앞으로 소개할 내용은 나무지 B형과 C형에 관한 해설을 주로 다루게 될 것이다. B형 시험과 C형 시험의 주된 대상들은 격납용기의 관통부들이다. 이 글에서는 B형과 C형 시험의 일분 주의 사항들을 해설한다.

• 방재와보험
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• s.42
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• pp.72-75
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• 1989