Patent ID: 11947054
Assignee: WESTINGHOUSE ELECTRIC COMPANY LLC
Field: Environmental technology (Chemistry)
Classification: CPC G | IPC G

Claim 10:
11. A radioactivity level measurement system comprising at least one radioactivity measurement device, the at least one radioactivity measurement device comprising:
a housing comprising an outer shell and an inner shell, wherein the inner shell is adapted to house an insertable radioisotope source, wherein the outer shell and the inner shell are configured to form a hollow annular region;
a self-powered detector positioned within the hollow annular region of the housing, the self-powered detector comprising:
at least one tubular emitter, wherein the at least one tubular emitter is configured to provide a source of electron emission E proportional to a radioisotope activity level of the insertable radioisotope source;
a first electrical interface electrically connected to the at least one tubular emitter;
at least one tubular collector, wherein the at least one tubular collector is configured to sink the electron emission E;
a second electrical interface electrically connected to the at least one tubular collector; and
at least one electrical insulation layer comprising an electrically insulating material, wherein the at least one electrical insulation layer is configured to insulate the at least one tubular emitter from the at least one tubular collector;

wherein the first electrical interface and the second electrical interface are adapted to output an electrical current I corresponding to the electron emission E.