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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Schulz Electric™ Refurbishes Critical Circulating Water Pump Motor in Only Four Days
Schulz Electric™ was contacted by a nuclear power plant in the New England region that serves a community of over 2 million homes. After five years of service, a 1500 HP, 4 kV, 24-pole circulating water pump motor (measuring approximately 7’ wide, 8’ tall, and weighing several tons) needed refurbishing while the plant was still online. To add to their concern, the power plant is located close to the ocean. The aging motor was not only approaching the end of its serviceable life, but was highly susceptible to moisture intrusion and the salt-laden air, which can build up in air passages within the motor. These environmental conditions can lead to elevated operating temperatures and corrosion developing on the rotor, stator, and shaft components. These factors combined, placed the plant at an increased risk of downtime that could have potentially led to a significant loss of revenue if they were forced into a shutdown event.
C. Z. Cheng
Fusion Science and Technology | Volume 18 | Number 3 | November 1990 | Pages 443-454
Alpha Particles in Fusion Research | Technical Paper | doi.org/10.13182/FST90-A29280
Articles are hosted by Taylor and Francis Online.
The NOVA-K code is employed to study the effects of alpha particles on two types of magnetohydrodynamic (MHD) modes: (a) the stabilization of ideal MHD internal modes and the excitation of resonant internal modes, and (b) the alpha-particle destabilization of toroidicity-induced Alfvén eigenmodes (TAEs) via transit resonances. Analytical theories are also presented to help explain the NOVA-K results. The trapped alpha particles are found to destabilize the n = 1 internal mode and lower the total beta threshold. The circulating alpha particles can strongly destabilize TAE modes via inverse Landau damping associated with the spatial gradient of the alpha-particle pressure.
