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The degradable protective articles made of thermoplastic polyvinyl alcohol (TPVA) are widely used in nuclear power plants, and they are thermally decomposed after use to reduce solid waste. However, in the real decomposition of TPVA, the temperature in the oxidation reactor is not self-sustaining; as a result, the degradation products contain a lot of CO, resulting in more pollution and energy waste. In this paper, jet stirred reactor (JSR) and Chemkin software were used to study the reaction kinetics characteristics of the oxidation process of degradation products from TPVA in the range of 550 °C–700 °C. Both experiments and kinetic simulation show that a higher average temperature of the oxidation reactor is needed to achieve lower CO emissions. When using 5% or 10% TPVA degradation solution, the average temperature should not befall below 625 °C or 675 °C. The corresponding residence time should be greater than 6 s and 5 s respectively. The combination of research findings and engineering practice provides great help to the optimization of the actual work process. • The temperature and residence time required for the complete degradation of thermoplastic polyvinyl alcohol after preliminary oxidation with the Fenton method were studied in a jet stirred reactor. • Ketones, the main products of TPVA initial degradation, are used as combustible materials after solution gasification to simulate the oxidation process simulation. • The simulated data are in good agreement with the experimental data. • This article produces cloud maps of operating conditions corresponding to different CO and CH 4 emission standards to guide similar engineering applications. [ABSTRACT FROM AUTHOR]