Affiliation:
1. Department of Nuclear Power Plant Engineering, KEPCO International Nuclear Graduate School (KINGS), 658-91 Haemaji-ro, Seosang-myeon, Ulju-gun, Ulsan 45014, Republic of Korea
Abstract
An SMR (small modular reactor) is expected to be able to operate flexibly in conjunction with a high renewable energy penetration grid as a result of improved safety and easy power control compared to large nuclear power plants. SMRs, such as South Korea’s System-integrated Modular Advanced ReacTor (SMART), are designed to use canned motors (CMs) for their reactor coolant pumps (RCPs) to enhance their safety. CMs passively enhance the reactor’s safety by preventing the leakage of radioactive reactor coolant. However, with motor sizes designed to be as small as possible, and the increased air gap of CMs between the stator and rotor, the starting torque may be insufficiently low compared to that of similar-sized induction motors (IMs). Thus, CMs may require variable frequency drives (VFDs) to start. This paper compares the torque characteristics of CMs with those of IMs for SMART’s RCPs. ETAP is then used to perform a motor-starting analysis for CMs activated with and without VFDs. The results are presented and analyzed to find out if VFDs can deal with the CM starting torque issue.
Funder
KEPCO International Nuclear Graduate School (KINGS),
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference19 articles.
1. Chang, C., and Oyando, H.C. (2022). Review of the Requirements for Load Following of Small Modular Reactors. Energies, 15.
2. Villaran, M., and Subudhi, M. (1996). Aging Assessment of Large Electric Motors in Nuclear Power Plants, Nuclear Regulatory Commission.
3. Enhanced safety characteristics of SMART100 adopting passive safety systems;Bae;Nucl. Eng. Des.,2021
4. Carelli, M.D., and Ingersoll, D.T. (2020). Handbook of Small Modular Nuclear Reactors: Second Edition, Woodhead Publishing.
5. IAEA (2020). Advances in Small Modular Reactor Technology Developments—A Supplement to: IAEA Advanced Reactors Information System (ARIS), IAEA.