• Nuclear Engineering and Technology
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• 제54권6호
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• pp.2230-2243
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• 2022

The tin tailing processing industry in Malaysia has operated with minimal regard and awareness for material management and working environment safety, impacting the environment and workers in aspects of radiation and heavy metal exposure. RIA was conducted where environmental samples were analyzed, revealing concentrations of ²²⁶Ra, ²³²Th and ⁴⁰K between the range of 0.1-10.0, 0.0-25.7, and 0.1-5.8 Bq/g respectively, resulting in the AED exceeding UNCEAR recommended value and regulation limit enforced by AELB (1 mSv/y). Ra_eq calculated indicates that samples collected pose a significant threat to human health from gamma-ray exposure. Assessment of heavy metal content via pollution indices of soil and sediment showed significant contamination and enrichment from processing activities conducted. As and Fe were two of the highest metals exposed both via soil ingestion with an average of 4.6 × 10^-3 mg/kg-day and 1.4 × 10^-4 mg/kg-day, and dermal contact with an average of 5.6 × 10^-4 mg/kg-day and 6.0 × 10^-4. mg/kg-day respectively. Exposure via accidental ingestion of soil and sediment could potentially cause adverse non-carcinogenic and carcinogenic health effect towards workers in the industry. Correlation analysis indicates the presence of a relationship between the concentration of NORM and trace elements.

• Strategy21
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• 통권42호
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• pp.5-52
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• 2017

Debates about introducing nuclear submarines have been a main issue in Korea. The highest officials and the government has started to think seriously about the issue. Yet there were no certain decision to this issue or any agreements with US but it is still necessary to review about introducing nuclear submarines, the technologies and about the business. The reason for such issues are the highest officials of Korea to build nuclear submarine, nK's nuclear development and SLBM launching. ROKN's nuclear submarine's necessity will be to attack(capacity to revenge), defend(anti-SSBN Operation) and to respond against neighboring nation's threat(Russia, Japan, China). Among these nations, US, Russia (Soviet Union), Britain, France had built their submarines in a short term of time due to their industrial foundation regarding with nuclear propulsion submarines. However China and India have started their business without their industrial foundation prepared and took a long time to build their submarines. Current technology level of Korea have reached almost up to US, Russia, Britain and France when they first built their nuclear propulsion submarines since we have almost completed the business for the Changbogo-I,II and almost up to complete building the Changbogo-III which Korea have self designed/developed. Furthermore Korea have reached the level where we can self design large nuclear reactors and the integrated SMART reactor which we can call ourselves a nation with worldwide technologies. If introducing the nuclear submarine to the Korea gets decided, first of all we would have to review the technological problems and also introduce the foreign technologies when needed. The methods for the introduction will be developments after loans from the foreign, productions with technological cooperations, and individual production. The most significant thing will be that changes are continuous and new instances are keep showing up so that it is important to only have a simple reference to a current instances and have a review on every methods with many possibilities. Also developing all of the technologies for the nuclear propulsion submarines may be not possible and give financial damages so there may be a need to partially introduce foreign technologies. For the introduction of nuclear propulsion submarines, there must be a resolution of the international regulations together with the international/domestics resistances and the technological problems to work out for. Also there may be problem for the requirement fees to solve for and other tough problems to solve for. However nuclear submarines are powerful weapon system to risk everything above. This is an international/domestically a serious agenda. Therefore rather than having debates based on false facts, there must be a need to have an investigations and debates regarding the nation's benefits and national security.

• 문화기술의 융합
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• 제10권3호
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• pp.299-304
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• 2024

미국과 소련이 맞서는 제1차 핵시대를 넘어 지금은 크고 작은 국가들로 핵 사용 결정권자가 다양화된 제2차 핵시대라고 할 수 있다. 이에 해당하는 국가인 인도와 파키스탄은 서로 적대국으로 맞서며 핵무기를 보유하고 있지만 핵태세, 핵전략은 상반돼 있다. 두 국가의 사례는 우리나라가 마주한 북한이 앞으로 어떤 핵태세를 취할 것인지에 대해 실마리를 줄 수 있다. 특히 파키스탄이 선택한 선행적 확전 태세는 상대 위협에 대해 핵무기를 선제적으로 쓸 수있다고 위협해서 적의 침략을 억제시키는 매우 공세적인 핵태세이다. 이는 선제공격할 수 있는 소규모 핵무기로도 할수 있는 옵션이다. 따라서 핵능력이 열세한 파키스탄이 인도의 위협에 대응하여 선택할 수 있는 최적의 태세로 보인다. 미국과 한국에 비해 열세인 북한은 앞으로도 파키스탄처럼 핵무기를 선제적으로 사용할 수 있다고 위협할 것으로 보인다. 반면 정권 유지를 위해 실제 사용하기까지는 인도와 같이 수세적이고 상당히 보수적일 것으로 전망된다.

• 한국압력기기공학회 논문집
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• 제16권1호
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• pp.110-116
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• 2020

As the management plan for domestic spent nuclear fuel is delayed, the storage of the operating nuclear power plant is approaching saturation, and the Kori 1 Unit that has reached its end of operation life is preparing for the dismantling plan. The first stage of dismantling is the transfer of spent nuclear fuel stored in storage at plants. The spent fuel management process leads to temporary storage, interim storage, reprocessing and permanent disposal. In this paper, the technical issues to be considered when transporting spent fuel in this process are summarized. The spent fuels are treated as high-level radioactive waste and strictly managed according to international regulations. A series of integrity tests are performed to demonstrate that spent fuel can be safely stored for decades in a dry environment before being transferred to an intermediate storage facility. The safety of spent fuel transport container must be demonstrated under normal transport conditions and virtual accident conditions. IAEA international standards are commonly applied to the design of transport containers, licensing regulations and transport regulations worldwide. In addition, each country operates a physical protection system to reduce and respond to the threat of radioactive terrorism.

• Nuclear Engineering and Technology
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• 제53권9호
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• pp.3068-3084
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• 2021

Investigations of large commercial aircraft impact effect on nuclear power plant (NPP) buildings have been drawing extensive attentions, particularly after the 9/11 event, and this paper aims to experimentally assess the damage and vibrations of NPP buildings subjected to aircraft crash. In present Part I, two shots of reduce-scaled model test of aircraft impacting on NPP building were carried out. Firstly, the 1:15 aircraft model (weighs 135 kg) and RC NPP model (weighs about 70 t) are designed and prepared. Then, based on the large rocket sled loading test platform, the aircraft models were accelerated to impact perpendicularly on the two sides of NPP model, i.e., containment and auxiliary buildings, with a velocity of about 170 m/s. The strain-time histories of rebars within the impact area and acceleration-time histories of each floor of NPP model are derived from the pre-arranged twenty-one strain gauges and twenty tri-axial accelerometers, and the whole impact processes were recorded by three high-speed cameras. The local penetration and perforation failure modes occurred respectively in the collision scenarios of containment and auxiliary buildings, and some suggestions for the NPP design are given. The maximum acceleration in the 1:15 scaled tests is 1785.73 g, and thus the corresponding maximum resultant acceleration in a prototype impact might be about 119 g, which poses a potential threat to the nuclear equipment. Furthermore, it was found that the nonlinear decrease of vibrations along the height was well reflected by the variations of both the maximum resultant vibrations and Cumulative Absolute Velocity (CAV). The present experimental work on the damage and dynamic responses of NPP structure under aircraft impact is firstly presented, which could provide a benchmark basis for further safety assessments of prototype NPP structure as well as inner systems and components against aircraft crash.

• 안보군사학연구
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• 통권13호
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• pp.43-81
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• 2016

Security environment we face in the Korean Peninsula is unexpectable. Tensions between Seoul and Pyeongyang and its threats are continuously evolving. Kim Jung Un will keep on conducting provocations and DPRK's isolation will result uncertainty to their objective and intention. KPA is centered on ground forces with conventional weapons but they possess modernized missiles and nuclear capabilities. What's more concerning is that North Korea continuously pursue and develop nuclear weapons and missile capabilities. Pursuing defense reform is inevitable for the ROK to deal adequately against the security threats posed by the North and to prepare for the environment of future warfare. If we are satisfied with the current capabilities then our military capabilities and security status will retrogress. We have to reorganize our units to make a small but FMC, smart military organization. Organization analysis is an urgent issue for reorganizing units. However, it isn't an easy task to reform an organization. There are vague parts for analysis and strong resistance from the people within the organization. Therefore should not focus on the reduction of people and the organization. Organization reform should be done with the acknowledgement of most of the personnel and should focus on the task and its method. These should be reflected to the organization analysis.

• 기독교교육논총
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• 제61권
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• pp.109-129
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• 2020

이 연구는 동북아 국가의 지역적 쟁점을 성찰한다. 특히, 북한의 핵 문제에 대한 미국의 대외정책의 기조에서 연구가 시작되는 동기를 탐구한다. 연구자는 주된 연구방법으로 탐구에 기초한 실천신학의 방법론을 사용한다. 이 분석은 정치적 쟁점과 종교교육의 복합적인 관계를 연결하는 접근을 선호한다. 여기서 복합적인 관계란 정치학의 사회과학적 전제와 종교교육의 규범적 가치를 학제 간 대화의 방법으로 접근하는 관점을 의미한다. 이러한 관점에서 종교교육의 생태는 백인 우월성에 관한 인류학적이며 인종적인 차별의 위협을 무력화하는 교육적 목적을 지향한다. 특히 연구자는 학습자와 교사의 공유적 페다고지를 지지하며, 하나님의 민주적 임재라는 관점을 통해 예수 그리스도께서 억압의 환경에 도전하는 내러티브를 구성하는 연구의 목적을 실행한다.

• 한국과 국제사회
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• 제1권2호
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• pp.171-208
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• 2017

본 논문은 북한 핵전략의 유형적 특징과 전망을 분석하기 위한 것이다. 이를 위해 핵전략의 개념과 유형, 북한의 핵능력과 선언적 핵전략, 북한 핵전략의 운용상의 특징과 전망을 살펴본 후 결론에서 우리의 대응을 도출해본 것이다. 최근 북한의 핵무기 배치와 핵능력 증강은 우리의 안보와 군사적 대비태세에 매우 심각한 문제를 제기하고 있다. 핵전략이란 핵무기의 구성 배치 운용을 둘러싼 군사전략을 의미한다. 북한의 핵전략에 대한 연구는 북한의 핵무장이 실체화되었다는 매우 현실적인 가정에서 출발한다. 우리 국방당국이 북핵에 대한 대응책으로 선제공격, 미사일방어, 대량응징보복 개념을 제시하고 그 도입과 전개를 서두르는 것은 북한의 핵무장을 전제로 한 조치이다. 표출된 북한의 선언적 핵전략은 (1)'핵보유국법'상의 핵억제 보복전략, (2)핵선제공격론, (3)제7차 당대회에 나타난 '핵선제 불사용원칙으로, 그리고 북한 핵전략의 저의 및 운용상의 특징은 (1)기존핵국가 관행모방을 통한 비난회피, (2)선언적 핵전략을 통한 자신의 핵전략의 호도, (3)핵전력과 핵태세간 격차로 인한 핵전략의 미정착 등으로 각각 요약해 볼 수 있다. 북한은 개정헌법(2012.7), '핵무력과 경제건설의 병진노선(2013.3),' 그리고 핵보유국법(2013.4) 등을 통해 스스로 핵보유국임을 규정 선언하고 있다. 하지만 '핵보유국(핵국가)' 지위는 오로지 NPT만 부여할 수 있는데, 이것은 이미 닫힌 시스템이다. 현실적으로 우리가 당면한 북핵위협을 억제 극복해 나가기 위해서는 튼튼한 한미동맹과 긴밀한 한미 공조하에 북한핵의 억제는 물론 비핵화 무력화를 위한 우리의 단 중 장기적인 정치 군사적 대응책의 수립 이행노력이 긴요하다.

• Strategy21
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• 통권31호
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• pp.5-26
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• 2013

The South Korean society has experienced many changes since the sinking of ROKS Cheonan. The government reviewed its defense posture and adopted the 5·24 Measure in its relations with North Korea. As a result, the people of South Korea became more conscious of security situations on the Korean peninsula while North Korea's economy suffered badly. Meanwhile, the South Korean government has taken a flexible stance toward North Korea in terms of exchange and cooperation since September 2011. The flexible stance was to manage inter-Korea relations in a stable manner and relieve the hardships of the North Korean people while preserving the spirits and purposes of the 5·24 Measure. The UN Security Council adopted twenty-six resolutions and statements on North Korea since June 25, 1950. They include thirteen U.N. Security Council resolutions including those concerning nuclear weapons or missile programs, nine Presidential statements, and four press statements. Resolution 82, the first U.N. resolution on North Korea, came when the Korean War broke out. Resolution 825, the first one related to nuclear or missile programs, was adopted in response to North Korea's withdrawal from the NPT. Apart from these U.N. resolutions, the United States has imposed separate sanctions against North Korea. North Korea's nuclear weapons program can be considered in comparison with that of Iran in terms of the consequences they create for the regional security. The Security Council has adopted six resolutions on Iran so far. One should note that the resolutions on Iran have had much stronger sanctions compared to those imposed on North Korea. That is, while the North Korea case may be viewed as a more serious threat to international security from the perspective of nuclear weapons development or proliferation, tougher sanctions have been placed on Iran. There are two approaches that South Korea should take in addressing the related issues. First, we should aim to reduce the gap between sanctions imposed on Iran and North Korea. It is difficult to understand that a country with more serious problems is rewarded with lighter sanctions. We should take measures through the Security Council Sanctions Committee to make individuals and groups in North Korea that play a central role in developing nuclear weapons and missiles subject to additional sanctions. Second, we have to change. Other countries in the international community have become tired of North Korea's nuclear issue and now they look to South Korea for initiative. We should correctly understand this current situation and play a leading role within our capacity. Knowingly and unknowingly, the notion that the North Korean nuclear issue may be left to South Korea has been spread around the international community. Although the situation is grave, we should try to open a new horizon in ushering in the unification era by taking the initiative with confidence that there is a looming hope ahead of us. For these tasks, we should stop thinking in the old way that has been ossified for the last two decades. We should not be pushed around by neighboring great powers in dealing with North Korea related issues anymore; we should take the initiative with resolution that we will play our role at the center of four great powers and with confidence that we can do it. Based on the confidence that the Republic of Korea has become a country with enough capacity to take the initiative, we should establish a 'National Grand Strategy' representing South Korea's strategic vision that the unification is the ultimate solution to the problems related to North Korea's nuclear weapons program.

• 셀메드
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• 제10권3호
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• pp.21.1-21.8
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• 2020

Over a span of few decades, the world has seen the emergence of new viruses that have posed serious problems to global health .COVID-19 is a major pathogenic threat to the modern world that primarily shoots the respiratory system of human beings. Wuhan which is the capital city of Hubei, China was the first place in the world where first cases of COVID-19 emerged and the scores of cases significantly increased at an immense rate leading to city isolation and establishment of new specially designed hospitals. SARS-CoV had emerged from bats in china (2002) and MERS-CoV from camels transmitted via bats in Middle East (2012) where the previous versions of COVID-19 took place. Infections with SARS-CoV-2 are now widespread, like Nuclear Chain Reaction (NRC). In this review we will discuss the COVID-19 origin, transmission, incubation, diagnosis and therapies available at the present scenario.