An experimental program involving radiochemical and spectrochemical analysis of short-cooled samples of SNAP-8 Experimental Reactor (S8ER) primary coolant is described. Evidence for the presence of corrosion products, fission products, and coolant activation products was sought. Gamma-ray spectrometric and dc-arc emission spectrographic techniques and the methods for determining a sensitivity for detection are described. Experimental data revealed essentially no detectable corrosion-product activities in the NaK. Fission product 137Cs was clearly observed. Fission products other than 137Cs, 131I, 132Te, 132I, and 125Sb were not observed using spectrum stripping techniques. Sources of other observed radio-nuclides are proposed. Corrosion-product and fission-product activities were observed on primary cold trap and piping surfaces.