FIELD: nuclear engineering; water moderated water cooled reactors and cooling ponds for detecting leaky fuel elements in fuel assemblies.
SUBSTANCE: proposed device for checking tightness of fuel elements in fuel assemblies has rod, submersible pump, flow-type degasifier, and pipes for feeding pure distillate and compressed air. Rod mounts facility for connecting and packing fuel assembly. Flow-type degasifier is made in the form of vessel accommodating partially perforated and axially disposed tube. Degassed water drain pipes as well as air and water discharge pipes are provided in upper part of vessel and pipes for feeding air through bubbling manifold, in its lower part. Invention specification also includes relevant method for checking nuclear reactor fuel elements for tightness.
EFFECT: ability of on-line shooting of leaky fuel elements and evaluation of flaw size in faulty fuel element.
6 cl, 2 dwg
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