Spent fuel container alignment device and method
First Claim
1. An alignment device for use with a spent fuel shipping container including a plurality of fuel pockets for spent fuel arranged in an annular array and having a rotatable cover including an access opening therein, said alignment device comprising:
- a plate for installation over the access opening of the cover and including a laser admittance window therein;
a laser device mounted on said plate for directing a laser beam through said laser admittance window into said container; and
indexing means provided on said container for providing an indication of the angular position of the rotatable cover when the laser beam produced by the laser is brought into alignment with a fuel pocket in the container.
1 Assignment
0 Petitions
Accused Products
Abstract
An alignment device is used with a spent fuel shipping container including a plurality of fuel pockets for spent fuel arranged in an annular array and having a rotatable cover including an access opening therein. The alignment device includes a lightweight plate which is installed over the access opening of the cover. A laser device is mounted on the plate so as to emit a laser beam through a laser admittance window in the cover into the container in the direction of a pre-established target associated with a particular fuel pocket. An indexing arrangement on the container provides an indication of the angular position of the rotatable cover when the laser beam produced by the laser is brought into alignment with the target of the associated fuel pocket.
15 Citations
17 Claims
-
1. An alignment device for use with a spent fuel shipping container including a plurality of fuel pockets for spent fuel arranged in an annular array and having a rotatable cover including an access opening therein, said alignment device comprising:
-
a plate for installation over the access opening of the cover and including a laser admittance window therein; a laser device mounted on said plate for directing a laser beam through said laser admittance window into said container; and indexing means provided on said container for providing an indication of the angular position of the rotatable cover when the laser beam produced by the laser is brought into alignment with a fuel pocket in the container. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for determining the alignment position of an access opening of a cover for a spent fuel container with respect to each of a plurality of annularly arranged fuel pockets within the spent fuel container so that spent fuel can be placed into each of said fuel pockets through said access opening, said method comprising:
-
preestablishing an alignment target for each of the fuel pockets; mounting a support plate including a laser admittance window therein over the access opening of the cover of the spent fuel container; affixing a laser to said support plate in alignment with said laser admittance window in an orientation wherein, when the laser is energized, a laser beam is directed into said container through the window; energizing the laser and rotating the cover until the laser beam directed by the laser into said container is in alignment with the target of a first fuel pocket; using an index ring arrangement at the top of the container to determine the angular position of the cover, and hence the relative angular alignment position of the first fuel pocket, when the laser beam is in alignment with the target of the first fuel pocket; and repeating the process for each of the other fuel pockets. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
Specification