The control strategy for surface temperature of the core rod is investigated and the scheme of introducing advanced compensation on the quantity of inlet water by gradient function is stated.

Inadequate submergence can result in pre-rotation of the water in the wet-well, resulting in the formation of strong free-surface air core vortices and the entrance of air into the pump suction inlet.

The circulation inlet port is designed so as to enable the introduction of water into the reservoir tangentially to the surface.