Method for examining irradiated fuel bundle spacer springs using

Details Method for examining irradiated fuel bundle spacer springs using Method for examining irradiated fuel bundle spacer springs using

1993-07-09

1994-09-13

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

Optics

376249, G21C 1700

Patent

active

053475518

ABSTRACT:
An improved method for examining fuel bundle spacers using fiber-optic visual inspection apparatus. A distal end of a fiber-optic scope having image and light guides is inserted through an upper tie plate and between the fuel rods of a fuel bundle assembly at the top thereof. The distal end of the scope is then lowered into the space between a group of spacer ferrules until a side aperture of the scope is at the elevation of the spacer spring to be inspected. Light is supplied to the light guide and redirected out the side aperture to a spot proximal to the field of view of the image guide. The distal end of the scope is rotated until the spacer spring to be inspected is visible through an ocular lens coupled to the image guide. The spring is visually inspected for defects by moving the scope to scan the spacer spring.

REFERENCES:
patent: 3856000 (1974-12-01), Chikama
patent: 4255762 (1981-03-01), Takeyasu et al.
patent: 4605531 (1986-08-01), Leseur et al.
patent: 4657728 (1987-04-01), Coppa et al.
patent: 4735483 (1988-04-01), Kuroiwa et al.
patent: 4764334 (1988-08-01), King et al.
Advertisement Bulletin published by Furukawa Electric Co. of Japan.

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