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Mr. Mostafa Mohammed Mousa (NPP alumni)’s paper was selected as a best paper of the 2020 KOSSE (The Korean Society of Systems Engineering) Fall Conference.

The summary of the paper is:

Operators in the nuclear power plant should follow the instructions and manage information from an enormous amount of processes, procedures, and guidelines. Quick analysis for monitoring data and executing the required action on time is very important for plant safety. For this reason, a recommender or an advisory system can be developed to aid the operator so that the necessary decisions and recommended procedures are carried out. Digital Twin technology provides rapid data analysis to find good insights from this data that will lead to the necessary action. Systems engineering approach (SE) was used in developing digital twin for the reactivity control system using the control element drive mechanism system to support operator actions. The Systems engineering is introduced for identifying the requirements, operational concept and associated verification and validation steps required in development process by linking each requirement to a validation or verification test with predefined success criteria. As application for this development, the CEDM Digital Twin is able to detect control element misalignment and power escalation due to excessive CEDM withdrawal to provide the operator with the required action according to the operation limits and conditions.

Attachment: The presentation “Application of SE Approach for CEDM Digital Twin, Mr. Mostafa Mohammed Mousa, Prof. Jae-cheon Jung, The Korean Society of System Engineering fall Conference, Jeju, Korea, November 26-27, 2020”

Mr. Thomas Tsuma Kalenga (NPP second-year)’s paper was selected as a best paper of the 2020 KIEE (The Korean Institute of Electrical Engineers) Summer Conference.

This paper seeks to develop a real-time surge arrester monitoring scheme to prevent failure of surge arrester. And analyzes the VCB switching transient voltages to confirm motor surge withstand capacity and adjust the GFR pick-up and delay settings to prevent false operation.

Attachment: The paper “Countermeasures Against Surge Arrester Failure and Ground Fault Relay False Operation in Medium Voltage Distribution Systems, Mr. Thomas Tsuma Kalenga, Prof. Choong-koo Chang, The Korean Institute of Electrical Engineers, Summer Conference, Busan, Korea, July 15-17, 2020”

Ms. Amy Nkirote Gichuru (NPP second-year)’s paper was selected as a best paper of the 2020 KSME (The Korean Society of Mechanical Engineers) Spring conference.

The purpose of the paper is to estimate the equivalent Young’s modulus of the APR 1400 nuclear fuel spacer grid to obtain a reduced model of the fuel assembly. The structural strength of nuclear fuel assemblies in the reactor core throughout the core life is important due to the need to withstand lateral static and dynamic loads resulting from external forces. This requirement ensures that there is a sustained coolant flow for the fuel assembly keeping proper geometry without structural deformation. For this study, first, a three dimensional model of the nuclear fuel spacer grid was developed to provide consistent predictions of the 16 x 16 type APR 1400 spacer grid and also act as the reference for the simulation. Secondly, a 5 x 5 spacer grid beam model is designed, representative of the spacer grid. Applying the boundary conditions for the solid model maximum directional deformation is obtained. Isotropic material properties are set as this is the reference. Orthotropic material properties for the beam model and Young’s modulus and shear modulus in the respective directions, maximum directional deformation, and the modulus parameters set to optimize these values. The optimized values of Young’s modulus and shear modulus are obtained subsequently and the equivalent Young’s modulus and reduced model of the spacer grid. The conservative modeling approach is used for this analysis due to the intricate shape of the nuclear fuel assembly spacer grid.

Attachment: The paper “Estimation of APR 1400 Nuclear Fuel Spacer Grid Equivalent Young’s Modulus for a Reduced Model of Fuel Assembly, Ms. Amy Nkirote Gichuru, Prof. Ihn Namgung, The Korean Society of Mechanical Engineers, Spring Conference, Jeju, Korea, July 15-17, 2020”

KINGS held the 9th opening ceremony on the sep. 16th in the conference room. Due to the second stage of social distancing in Corona 19, only the minimum number of people attended this event, and the rest watched the event online.

At this event, Professor Kim Joo-Yeol of the Department of Nuclear Industry, and Gu Ms. Gu Myung-eun of the Planning and Management Team, and Cho Kyung-min of the Academic Affairs, who contributed to the development of the school, were awarded the Achievement Award.

In a congratulatory remark, President Nam-sung Ahn said, “Thank you to the faculty and students who are doing their best even in difficult conditions due to Corona 19, and urgently establish a digital-based education system to take the lead in rapid external environmental changes, Through efforts to diversify, we will be able to create successful results.”

On the other hand, following the commemoration of the school opening ceremony, a signing ceremony was held for a joint labor-management joint social value practice agreement.

In the spirit of coexistence and cooperation between labor and management, President Ahn Nam-sung and Park Joon-woo, chairman of the employee labor union, faithfully comply with the health authorities' quarantine guidelines to overcome COVID-19, to protect the safety and health of members, and to use local currency or Onnuri gift certificates as part of the management performance pay. It was purchased as a public institution and pledged to fulfill its social responsibilities.