• 대한조선학회논문집
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• 제56권3호
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• pp.263-272
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• 2019

The aim of this study is to develop a rapid calculation technique of the residual strength in order to prevent sequential events under grounding accidents. Very Large Crude-Oil Carrier (VLCC), Suezmax, and Aframax double hull oil tankers carrying large quantities of crude oil were selected for target structures. The rock geometries are chosen from the published regulation by Marine Pollution Treaty (MARPOL) of the International Maritime Organization (IMO). Oceanic rocks as the most frequently encountered obstruction with ships are applied in this work. Damage condition was predicted using ALPS/HULL program based on grounding scenario with selected parameters, i.e. depth of penetration, damage location and tanker type. The results of the scenarios are quantified to form an empirical formula which can evaluate the residual strength. The proposed formula is validated by applying a series of random grounding scenarios.

• 한국항해항만학회지
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• 제32권10호
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• pp.821-827
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• 2008

현재 우리나라 선박관리업의 경우 선주에게만 선원의 고용권이 있으며 선박관리회사는 선원고용권이 없는 실정이다. 그리고 선박관리업자간 협력사업이 해외 선박관리업자에게는 허용되나 국내 선박관리업자 간에는 허용되지 않고 있다. 향후 해외 전문선박관리회사가 국내시장에 진출 시 국내 선박관리회사들의 경쟁력이 약화될 우려가 있다. 따라서 국내 선박관리업이 국제 경쟁력을 갖추기 위해 선원고용권 문제를 포함한 선박관리 관련 법, 제도의 미비점을 개선하고 정비하여야 할 필요성이 강조되고 있다. 본 연구는 국내 선박관리업의 선원관리제도 관점에서 국내 선박관리업의 활성화 방안을 검토하였다. 선원인력양성 선원의 고용권 보장, 선박관리회사간 재계약 허용, 비정규직 보호법에서 선원은 제외 등을 발전 방안으로 제시하였다.

• 대한조선학회논문집
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• 제46권1호
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• pp.69-77
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• 2009

Loss of human lives and properties including environmental damage due to large scale accidents requires change of our perception to marine safety. IMO is trying to re-establish overall marine safety system through long term plan such as GBS. Along this line, current regulation based safety evaluation is in process of changing into performance based methods, and for this transition, simulation based safety evaluation during design stage considering damage is highly necessary. In this paper, first, damage scenario is developed from IMO regulations and accident case studies. Then an integrated and simulation based safety evaluation prototype system considering both damage stability and structural safety is developed for the use during ship design process.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2018년도 공동국제학술발표회
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• pp.44-44
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• 2018

• 한국항만경제학회지
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• 제32권4호
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• pp.15-28
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• 2016

대한민국 제2의 도시인 부산에 위치한 부산항은 연간 18,000천 TEU 이상의 물동량을 처리하는 초대형 글로벌 컨테이너 항만이다. 이러한 부산항의 급격한 성장으로 인한 선박 물동량의 증가는 동시에 대기오염문제를 야기시켰고, 특히 항구는 인구가 밀집되어 있는 도심과 인접해있기 때문에 시민들은 대기오염으로 인한 건강상의 문제에 쉽게 노출되어 있는 것이다. 본 연구에서는 2011년부터 2년간 부산항의 선박 활동 자료를 통해 정박하는 대형 선박으로부터 발생되는 배기가스 배출량 및 연간 환경비용을 추정하였다. 그 결과 2011년도와 2012년도에 부산항에 입항한 50,686척과 48,842척의 선박으로부터 각각 2,343,037톤과 2,297,118톤의 배기가스가 배출되었고, 선종별로는 유조선이, 오염원 중에는 CO2가 가장 많은 부분을 차지하였다. 또한 이러한 배출량을 비용으로 환산한 결과, 연간 약 1조 2천억 원의 환경비용이 추정됨을 알 수 있었다. 본 연구는 이러한 분석을 통해 선박 대기오염 배출에 대한 엄격한 조치와 규제의 필요성을 제시하고, 부산항의 체계적인 선박 배출물 관리 체계를 구축하는데 적절하게 활용이 가능할 것으로 기대해본다.

• International Journal of Naval Architecture and Ocean Engineering
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• 제4권2호
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• pp.141-150
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• 2012

Ship damage caused by maritime casualties leads to marine pollution and loss of life and property. To prevent serious damage from maritime casualties, several types of safety regulations are applied in ship design. Damage stability regulation is one of the most important safety issues. Designs of ships for long international voyages must comply with these regulations. Current regulations, however, do not consider the characteristics of the operating route of each ship and reflect only ship size and type of cargo. In this paper, a damage safety assessment was undertaken for a ship carrying radioactive waste in actual wave conditions. Damage cases for safety assessment were constructed on the basis of safety regulations and related research results. Hull form, internal arrangement, loading condition and damage condition were modeled for damage safety simulation. The safety simulation was performed and analyzed for 10 damage cases with various wave heights, frequency and angle of attack on an operating route. Based on evaluation results, a design alternative was generated, and it was also simulated. These results confirmed that damage safety analysis is highly important in the design stage in consideration of the operating route characteristics by simulation. Thus a ship designer can improve safety from damage in this manner.

• 한국산업융합학회 논문집
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• 제21권6호
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• pp.429-437
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• 2018

The process gas piping of the offshore plant can cause a massive explosion if the gas leakage occurs during operation. For the purpose of precaution of gas leakage accident, an air pressure test is performed on the process equipment tests using a test pump as much as the power to the piping inner side, mix 99% nitrogen gas and 1% helium gas. The purpose of the air pressure test is to check the work conformity process by handling and regulation for initial piping process, assembly, installation of module, welding, center alignment of the pipes assembling flange gasket in an unrestrained free state. In this paper, the regulation of the problematic air pressure test was analyzed and the solution criteria were established. And leakage tests of existing equipment were performed applying these solution methods. As a result, it was confirmed that there was no problem.

• 한국항해항만학회지
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• 제44권5호
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• pp.375-381
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• 2020

The IMO has established a regulation for the ECDIS installation on ships based on the IHO S-57 standards. The ECDIS supports sailors in achieving a safe voyage by using ENCs and monitoring the information of their ship. However, the S-57 standards were developed as edition 3.1 and prohibited revision for more than 20 years. So, the IHO developed a new standard as S-100 into the hydrography and maritime field instead of updating the S-57 to edition 4.0. In this study, the new S-100 ECDIS was developed and verified with ENCs and the digital maritime safety information by using a ship steering simulator and by conducting an on-board sea-trial test. It evaluated the impact on ship operations if the next-generation navigation support system is introduced. Based on this research, the S-100 ECDIS will generate improvements such as safe voyages by providing various of real-time safety information and up-to-date data to ship and sailors.

• Journal of Advanced Marine Engineering and Technology
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• 제29권3호
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• pp.306-312
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• 2005

IMO $NO_x$ levels are generally possible to meet by means of primary on-engine measures. Further significant follow-on reductions are likely to require a secondary after-treatment technique. SCR(Selective Catalytic Reduction) technology is used almost exclusively for $NO_x$ removal in stationary combustion systems. In order to develop a practical SCR system for marine application on board ship, a primary SCR system using urea was made. The SCR system was set up on the ship, 'HANNARA' as a test vessel. employed a two-stroke cycle diesel engine as main propulsion, which is a training ship of Korea Maritime University. The purpose of this paper is to report the results about the basic effects of the below system parameters, The degree of $NO_x$ removal depends on some parameters, such as the amount of urea solution added, space velocity, reaction gas temperature and activity of catalyst.

• International Journal of Naval Architecture and Ocean Engineering
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• 제13권1호
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• pp.545-553
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• 2021

International Maritime Organization (IMO) have recently discussed the technical problems related to the second-generation intact stability criteria of ships. The second-generation intact stability criteria refer to five modes of vulnerability when the ship sailing in the ocean. In this study, we described a method to verify the criteria of the surf-riding/broaching. In case that Lv1 (Level 1) vulnerability criteria is not satisfied based on the relatively simple calculation using the Froude number (Fn), we presented the calculation procedure for the Lv2 (Level 2) criteria considering the hydrodynamics in waves. The results were reviewed based on the data for given previous ships. In absence of ship-specific data, a similar Lv2 result was confirmed by comparing the result obtained by calculating the added mass with the case where the added mass was 10% of the ship mass. This result will contribute to basic ship design process according to the IMO draft regulation.