This course begins with the fundamentals of radiation emission and detection. The focus is on neutron and gamma-ray radiation detection including the use of gas-filled detectors, scintillation detectors, and semi-conductor detectors. Topics include gamma-ray interactions with matter; gamma-ray detectors, gamma-ray spectroscopy, and passive gamma-ray detection; measurement of uranium enrichment; measurement of plutonium isotopic compositions; neutron interactions with matter; neutron detectors; total neutron counting; neutron coincidence counting; active neutron interrogation; irradiated fuel measurements; perimeter radiation monitors; calorimetry; and holdup measurements.