Patent Number: 051924919
Section: claims

1. In a boiling water reactor having a control element disposed in a water pond, an apparatus for the neutron-radiography testing of the control element, comprising a film cassette having a recording area, a water-free hood fitting over the control element, said hood having an open bottom and a wall facing said film cassette, said wall having an opening formed therein with a cross section corresponding to said for receiving said film cassette, said holding device having a downwardly open side extended below said opening through which said film cassette is to be introduced into said holding device, a neutron source, and a collimator, said neutron source, said collimator and said film cassette lying in one measurement plane. 2. The apparatus according to claim 1, wherein said holding device has a skimmer past which a surface of said film cassette adjacent to said hood can be fed. 3. The apparatus according to claim 1, including a coupling piece projecting from said film cassette, a coupling rod, and a detachable coupling link interconnecting said coupling piece and said coupling rod. 4. The apparatus according to claim 1, wherein said holding device has a guide surface with an upper end, a stop for said film cassette adjoining said upper end, and a locking device holding said film cassette in a test position.