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US 5,309,491 AGranted
Fuel assembly with secured rod ends at the foot
AssigneeSiemens Aktiengesellschaft
InventorsHans-Joachim Lippert, Werner Meier
Life of this patent
Estimating the term…
Abstract
In a fuel assembly, lower end pieces of fuel rods, guide tubes and coolant pipes, etc., are inserted and/or screwed into a base plate and secured against lifting by a bolt. In the case of fuel rods, in particular fuel rods which do not extend over the entire length of normal rods, the bolt is screwed onto connecting parts in such a way that a releasable bayonet closure is produced. In the case of coolant pipes of boiling water reactors, there is provided in particular a screw connection which is irreleasably secured against torsion by the bolt.
Claims18
A fuel assembly for a boiling water reactor, comprising:
- a) a cluster of mutually parallel fuel rods;
- b) a fuel assembly channel laterally surrounding said cluster of fuel rods and having open upper and lower ends;
- c) a top plate covering said open upper end of said fuel assembly channel and having coolant outlets formed therein;
- d) a foot part having an upper edge being inserted into said open lower end of said fuel assembly channel, and a base plate having coolant inlets formed therein, adjoining said edge and covering said open lower end of said fuel assembly channel;
- e) at least one coolant pipe being disposed between and parallel to said fuel rods and having a lower end with a lower end piece having an opening formed therein for coolant;
- f) said lower end of said coolant pipe and said base plate each having at least one connecting part with profiles being adapted to one another and forming a releasable connection of said end piece and said base plate;
- and
- g) a securing bolt engaging in both of said connecting parts for locking said releasable connection.
5 more elements
Dependencies are inferred from the claim text.