Boiling-water reactor with control rods in a reactor pressure vessel, which are adjusted with reactor cooling water as the hydraulic fluid

摘要

In a boiling-water reactor, the reactor pressure vessel (1) encloses the reactor core (2), composed of fuel elements (3), and control rods (8), which are adjusted by hydraulic drives (10). For this purpose, reactor cooling water is fed in as the hydraulic fluid into drives (10), from which it flows out via outlet openings (23) into the interior of the reactor pressure vessel (1). This takes place through a straight channel (18) between the drive (10) and the outlet opening (23) in which channel an ultrasonic probe (20) is arranged for measuring the position of the control rods (8). <IMAGE>