PROJECT TITLE, ''RESONANCE ABSORPTION DENSITOMETRY FOR MATERIALS ASSAY SECURITY SAFEGUARDS (RADMASS)'' GE RESEARCH WILL DEVELOP AN INNOVATIVE ACTIVE INTERROGATION TECHNIQUE CAPABLE OF PERFORMING MASS ACCOUNTANCY OF FISSILE MASS IN A NUCLEAR REPROCESSING FACILITY WITH LOW TIME LATENCY AND HIGH ACCURACY (BETTER THAN 1%) IN A RADIATION BACKGROUND OF ~1,000R/HR FOR GAMMAS OR NEUTRON EMISSION RATES ~104-105 NEUTRONS/SEC.