A spacer (18) for maintaining a pressure tube (12) in spaced relation with a calandria tube of a nuclear reactor.
The apparatus also comprises piezo-actuators operable to vibrate said pressure tube; and accelerometers used for measuring vibration of said pressure tube.
Each pressure tube is received within and extends through a corresponding shell tube and is configured to releasably retain at least one fuel bundle.
The spacer comprising a split ring (20) adapted to be disposed about the outer surface of said pressure tube.
The present invention provides an apparatus for detecting and/or repositioning annulus spacers used to maintain the position of a pressure tube withm a calandria tube of a nuclear reactor.
The method comprises extruding a tube from thermoplastic material, and subsequently forcing the tube over a mandrel (6) at an orientation temperature of the plastic material.
Part of the premixture is drawn into a floor area of the mixing reactor with a reduced cross section, re-mixed intensively in a chamber which is delimited by the reaction vessel and returned to the mixing area of the mixing reactor via a pressure pipe.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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