The proposed program consists of the development of a technique and a system to measure the radioactive decay of radwaste containment in storage canisters, casks and vaults. The system being considered deals with the direct measurement of the after heat being generated in the radwaste volumes. The system to be used to accomplish such measurements consists of a heat flux sensor envelope that surrounds a radwaste storage container so that all heat being generated within the radwaste is accurately monitored as it flows through such a sensor envelope. The envelope also contains a calibration beater system so that the calibration constant (rate of heat release per millivolt output signal) for this monitoring system can be determined and verified at any time. The millivolt output signal generated by the heat flux envelope is recorded as a function of time. A series of radwaste heat release demonstrations would be performed utilizing a simulated radioisotope heat source (an electrical heater located in a cylindrical container; the container would be positioned underground simulating practical applications).
Anticipated Results:It is anticipated that the demonstration effort outlined in this proposal will show that the new measurement system will accurately monitor the heat release (and radwaste content) in storage volumes. It will also be shown that this new accountability method will complement current nuclear radiation techniques in use and satisfy the - long-term remote monitoring requirement identified by the government.
