Reactor refuelling machines

Claim 1

IN COMBINATION, A NUCLEAR REACTOR COMPRISING A REACTOR CORE, A CORE SHIELD DEFINING A REFUELING FACE SPACED FROM THE CORE, A CORE ACCESS CHANNEL EXTENDING INWARDLY FROM THE REFUELING FACE AND TOWARDS THE REACTOR CORE, A PLUG MEMBER DISPOSED WITHIN THE CHANNEL AND ADAPTED TO GIVE VISUAL INDICATION OF THE AXIS OF THE CHANNEL FROM A SIGHTING POINT ADJACENT THE REFUELING FACE, AND A REACTOR REFUELING MACHINE COMPRISING A FUEL STORAGE CHAMBER, A FUEL TRANSFER HAVING A RECTILINEAR AXIS EXTENDING OUTWARDLY FROM THE STORAGE CHAMBER, MEANS FOR CONNECTING THE EXTENDED END OF THE TRANSFER TUBE WITH THE REFUELING FACE END OF THE ACCESS CHANNEL, MEANS FOR TRANSFERRING FUEL BETWEEN THE CORE AND THE STORAGE CHAMBER, MEANS FOR MOVING THE REFUELING MACHINE OVER THE REFUELING FACE, AN OPTICAL PERISCOPE MOUNTED ON THE MACHINE AND COMPRISING AN IMAGE REFLECTOR, MEANS FOR MOVING THE IMAGE REFLECTOR ALONG A PLANE PERPENDICULAR TO AND TRAVERSING THE AXIS OF THE TRANSFER TUBE, AND STOP MEANS LIMITING THE MOVEMENT TO TRAVEL BETWEEN A POSITION COINCIDING WITH SAID AXIS TO A POSITION CLEAR OF THE INNER WALL OF SAID TRANSFER TUBE, SAID IMAGE REFLECTOR BEING DISPOSED SO AS TO REFLECT LIGHT RAYS PASSING ALONG SAID TRANSFER TUBE FROM THE END REMOTE FROM SAID STORAGE CHAMBER.