[en] An induction furnace, capable of operation at 2000⁰C in steam, was developed to conduct product release tests. The test specimen and steam atmosphere are contained in a stabilized ZrO₂ furnace tube, which is heated by a concentric susceptor of either tungsten or graphite. A two-color optical pyrometer and high-temperature thermocouples are used for temperature measurement. The furnace has operated reliably for periods up to 30 min at test temperatures of 1400 to 2000⁰C with steam flowing at approx. 1 L/min. The apparatus for collecting the released fission products includes a TGT, an aerosol deposition sampler, a series of glass fiber filters, and heated charcoal. A steam condenser and cooled charcoal, for inert gas adsorption, are located further downstream. The principal analytical techniques used for fission product identification and measurement are: (1) gamma spectroscopy, for all radionuclides on all test components; (2) spark-source mass spectrometry, for all elements, primarily deposits on the thermal gradient tube and filters; and (3) neutron activation, for iodine on selected test components. 16 references, 26 figures, 7 tables