Mapo Gu, South Korea
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Woo T.H.,Systemix Global Co.
Science and Technology of Nuclear Installations | Year: 2013

The dynamical assessment has been performed in the aspect of the nuclear power plants (NPPs) security. The physical protection system (PPS) is constructed by the cyber security evaluation tool (CSET) for the nuclear security assessment. The systems thinking algorithm is used for the quantifications by the Vensim software package. There is a period of 60 years which is the life time of NPPs' operation. The maximum possibility happens as 3.59 in the 30th year. The minimum value is done as 1.26 in the 55th year. The difference is about 2.85 times. The results of the case with time delay have shown that the maximum possibility of terror or sabotage incident happens as 447.42 in the 58th year and the minimum value happens as 89.77 in the 51st year. The difference is about 4.98 times. Hence, if the sabotage happens, the worst case is that the intruder can attack the target of the nuclear material in about one and a half hours. The general NPPs are modeled in the study and controlled by the systematic procedures. © 2013 Tae Ho Woo.


Woo T.H.,Systemix Global Co.
Kerntechnik | Year: 2015

The nuclear fuel cycle is investigated for the perspective of the nuclear non-proliferation. The random number generation of the Monte-Carlo method is utilized for the analysis. Five cases are quantified by the random number generations. These values are summed by the described equations. The higher values are shown in 52nd and 73rd months. This way could be a useful obligation in the license of the plant construction. The security of the nuclear fuel cycle incorporated with nuclear power plants (NPPs) is investigated using social impact theory. The dynamic quantification of the theory shows the non-secured time for act of terrorism which is considered for the non-secured condition against the risk of theft in nuclear material. For a realistic consideration, the meta-theoretical framework for modeling is performed for situations where beliefs, attributes or behaviors of an individual are influenced by those of others. © Carl Hanser Verlag, München.


Woo T.H.,Systemix Global Co.
Energy Sources, Part A: Recovery, Utilization and Environmental Effects | Year: 2015

The power increase in the nuclear power plants has been investigated for the safety aspect. Most equipment could be affected by the power uprate, which could increase the electricity power level. The quantification of the uprate reliability is performed by the system dynamics method, which is processed by the feedback and accumulation algorithms. The Vensim software package is used for the simulations, which is made by the Monte Carlo method. There are two kinds of considerations as the economic and safety properties. The result shows the stability of the operations when the power can be decided. This shows the higher efficiency of the reactor. The maximum value of risk is 157,887 in 2065 and the minimum value is 2 in 2010. Thus, the risk of the power uprate increases 78,954 times higher than the initial value in this study. © 2015 Taylor and Francis Group, LLC.


Woo T.-H.,Systemix Global Co.
Energy Sources, Part B: Economics, Planning and Policy | Year: 2015

The operation of nuclear power plants (NPPs) has been investigated in the aspect of safeguard assessment. The risk of the terrors in NPPs is one of the critical points in secure power operations. The basic event of the related incidents is quantified by game theory. The Cobb-Douglas function of the production function is modified and developed as the Safeguard Production Function. The standard productivity is compared with the interested power. Using the life extension, the range of the secure operation in 2,000 MWe is between 1.00 and 8.00 and the range in 600 MWe is between 0.00 and 1.00. This means the highest value in the range of secure power operation is about 8 times higher than that of the interested power operation in this study. The safeguard assessment is quantified by the life extension of the NPPs. Finally, the nuclear safeguard protocol is constructed for the successful safe operation. © Taylor & Francis Group, LLC.


Cho H.S.,Yonsei University | Woo T.H.,Systemix Global Co.
Annals of Nuclear Energy | Year: 2015

Nano-robotics is introduced for the nuclear industry for radiation treatment as a complete cure of cancer because it leads to the removal of cancerous cells. In order to ensure the reliability of treatment, one needs to control the radiation behavior of the therapy. The omni-directional cancer treatment program (OCTP) is suggested for the therapy planning in which all cancerous cells are killed without damage to normal cells. This is one of the most important issues in the conventional radiation therapy planning. The clinical cancer therapy planning is performed by nanorobots. The tiny machine treats the cancer cells effectively. The collision event occurs approximately over 35 nm. Therefore, if the diameter of tumor is 1 cm, the curable length is about 5 nm. Thus, one movement of nanorobot radiates about 10 nm in two dimensional planning. The example organ in this study is the breast. Nanorobots enter from the upper side of breast and exit from the lower side of the breast in the clinical example. © 2015 Elsevier Ltd. All rights reserved.


Nuclear energy has been studied for the secure power productions, which is based on the simulation study following the incident of nuclear cyber terror attack on South Korean nuclear power plants (NPPs). The social networking is used for the terror incident modeling and its prevention strategies. The nuclear industry could be investigated in the aspect of minimizing the dangerous situations caused by possible terror attacks which are considered by the society oriented connectivity among the related people or groups. The social networking circle by system dynamics diagram (SNCSD) is constructed, where the configuration of a model social networking example by system dynamics (SD) is applied. From A to H regions, the values are obtained by the random numbers incorporated with the designed algorithms. The results show the comparative values of terror possibilities which are based on the proposed social networking algorithm. It is possible to prepare for potential terrorism in the nuclear industry. © 2015 Elsevier Ltd. All rights reserved.


The environmental defense system in the nuclear power plants (NPPs) using water spray is investigated. A new kind of radiation protection system modeling is introduced in the case of NPPs accidents. The spray system is added to the conventional radiation protection barriers for the nuclear defense in depth concept where the water is considered as nano-scopic molecular substance. The effectiveness of aqueous solution is verified in a NPPs accident. The quantitative simulation for solubility of radioactive material is performed by the Monte-Carlo method, which is produced in the nuclear fuels. The safety concept is newly modified in the multiple barriers for the post accident. The cheap and simple system is suggested for the ecological safety in the NPPs accident as the political protocol. © 2013 Elsevier Ltd. All rights reserved.


Woo T.H.,Systemix Global Co. | Noh S.W.,Korea Atomic Energy Research Institute | Kim T.W.,Korea Atomic Energy Research Institute | Kang K.M.,Korea Atomic Energy Research Institute | Kim Y.I.,Korea Institute of Nuclear Safety
Energy Sources, Part A: Recovery, Utilization and Environmental Effects | Year: 2014

Using deficient operation data, safety assessment of a spherical shape core of a nuclear power plant is investigated for the core falling failure accident. The proposed shutdown system is analyzed in the new design of the reactor, which is called a spherical isotropic power reactor. Considering the system features, a new design could give advanced results in the economical as well as the safety aspects. The geometrical configuration of the spherical isotropic power reactor is introduced. In the aspect of the nano-scale consideration, safety assessment is incorporated with the fuzzy set theory, because the raw data are deficient. The most reasonable safe time is the 14th year of the lifetime. The results are incorporated with the stability of the new system.


Woo T.H.,Yonsei University | Woo T.H.,Korea University | Woo T.H.,Systemix Global Co.
Annals of Nuclear Energy | Year: 2016

The environmental defense system in the nuclear power plants (NPPs) is investigated in the aspect of the environmental scale incorporated with atmospheric and marine sectors. The object is to find the radiological protection protocol in the environmental scale which is different from the conventional three kinds of radiological protection principles. Conventional laboratory based principles are not applicable in the mass failure accident such as the case of Fukushima disaster. This newly introduced protocol has many useful applications for the nature treatment oriented methods where the atmospheric protection of dispersion and dissolution is performed first and the filtration of seawater would follow. The maximum and minimum values in fan velocity are about 7.5 m/s and 5.3 m/s respectively. For the spray system, the mole fractions by the water spray are shown where maximum and minimum values are 6.57 × 10-17 and 8.84 × 10-19 moles respectively. The maximum and minimum values of discharged values in filtration are 99.4 and 1.3 square velocity (m/s), respectively. The total and general radiological protection concept is suggested in the nanoscopic molecular scale performance. © 2015 Elsevier Ltd. All rights reserved.


Woo T.H.,Systemix Global Co.
International Journal of Electrical Power and Energy Systems | Year: 2014

The high temperature coolant of nuclear power plants (NPPs) has been investigated for the hydrogen production, which could be a major role of a green energy promotion. An accident of the high temperature gas cooled reactor (HTGR) is modeled for the stabilized hydrogen production using nuclear energy. For the clean energy resource pursuit in preventing the climate change, the hydrogen is one of very attractive energy sources. The non-operational data could be produced by the fuzzy set theory which is one of non-linear complex algorithms. So, the result can show the possibility of the event happening instead of the exact solutions. The random numbers are generated for membership numbers of the fuzzy function. The event manipulation is done by new membership numbers for the propagations. The final result is 1.0 in 8 times during 100 months. So, the frequency is 0.08, or 8% of successful long-term cooling by conduction. © 2014 Elsevier Ltd. All rights reserved.

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