Jacketed neutron-flux measuring gage for nuclear reactors

Claim 1

WITH A SOURCE OF NEUTRON FLUX, IN COMBINATION, A NEUTRON-FLUX MEASURING GAGE, COMPRISING A NEUTRON-FLUX DETECTOR AND A LAYERED STRUCTURE AT LEAST PARTLY ENCLOSING SAID DETECTOR, THE STRUCTURE AT LEAST ENCLOSING THE DETECTOR ON THE SIDES OTHER THAN THE ONE NEAREST THE SOURCE OF NEUTRONS, SAID STRUCTURE INCLUDING A LAYER ADJACENT THE DETECTOR COMPOSED OF A MODERATOR SUBSTANCE OF GREAT DIFFUSION LENGTH FOR THERMAL NEUTRONS, AND INCLUDING AN OUTER LAYER OF NEUTRON ABSORBER, THE STRUCTURE ALSO INCLUDING MATERIAL WHICH IS NEUTRON REFLECTIVE SITUATED BETWEEN SAID MODERATOR MATERIAL AND SAID OUTER LAYER, AND INCLUDING THE CASE WHERE THE MODERATOR SUBSTANCE AND THE NEUTRON REFLECTIVE MATERIAL ARE THE SAME MATERIAL, WHICH LATTER MATERIAL IS OF SUFFICENT THICKNESS TO HAVE BOTH MODERATOR AND NEUTRON REFLECTOR FUNCTIONS, THE MODERATOR CONVERTING FAST TO THERMAL NEUTRONS, SAID LAYERS BEING CONTIGUOUS AND CONSECUTIVE.