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The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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November 30–December 3, 2021
Washington, DC|Washington Hilton
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Nuclear Science and Engineering
Fusion Science and Technology
Neutron noise monitoring during plant operation expedites flexure replacement at Salem-1
The nuclear industry has historically relied on intermittent ultrasonic test and visual inspections of pressurized water reactor components to identify and manage degradation. While this reactive approach has proven to be effective, imagine a scenario in which the degradation could propagate throughout the reactor internals, making a more proactive measure necessary to avoid a major enterprise risk to the plant. Could a utility identify the onset of degradation within the reactor internals during plant operation? If so, could a repair be developed prior to the next refueling outage to prevent additional, cascading degradation? That is exactly the situation that Public Service Enterprise Group (PSEG) and Westinghouse engineers were able to navigate over the course of the 2019–2020 operating cycle at Salem Unit 1, resulting in a tremendous success for the plant and a historic landmark in the nuclear industry, while earning the team a 2021 Nuclear Energy Institute Top Innovative Practice (TIP) award.
Teng Wang, Yanlan Hu, Huajun Liu, Yu Wu, Yi Shi, Chao Pan, Longgui Zheng
Fusion Science and Technology | Volume 74 | Number 3 | October 2018 | Pages 229-237
Technical Note | dx.doi.org/10.1080/15361055.2017.1415613
Articles are hosted by Taylor and Francis Online.
The Central Solenoid Model Coils (CSMC) project (2014 to 2018), a part of the National Magnetic Confinement Fusion Science Program, is being developed by China independently under one of the largest research and development activities of the China Fusion Engineering Test Reactor (CFETR), demonstrating and validating the engineering design criteria of the CFETR central solenoid (CS) coil. The expected achievement is to charge the coil up to the operation current of 47.3 kA and the maximum magnetic field to 12 T with a swift rump rate of 1.5 T/s without quench. The quench detection shall be fast enough to dump out the magnetic energy and avoid irreversible damage to the systems. It is expected to provide the validation of design and analysis tools and the demonstration of quench analysis methods in the quench detection of the CFETR CS and the poloidal field (PF) magnet system.
Quench detection by voltage measurements is likely to be the fastest available technical solution, but the voltage detection is a real challenge due to large noise induced by the power supply in alternating current operation. Specific solutions have been proposed for the voltage compensation to effectively reduce the large inductive components from the measured voltage to a certain level. In 2016, the conception design was completed and adopted after the domestic and foreign experts review. This technical note gives an overall view of the quench detection design applied to the CSMC and its numerical results developed, including the classical hot-spot criterion, the quench propagation study, the quench detection parameter settings using the commercial code Supermagnet, and the estimation of the inductive disturbances.