Patent Number: 
Section: claims

1. A method for treating protective products manufactured by polyvinyl alcohol (PVA) so as to treat radioactive materials attached on the PVA protective products by a dissolution-concentration tank, the method comprising:a liquid waste pyrolysis/oxidation step for pyrolyzing and oxidizing organic matter in a filtrate treated by the dissolution-concentration tank at a high temperature;a catalytic oxidation step for treating organic matter existing in an untreated gas discharged from the pyrolysis/oxidation step;an exhaust cooling step for collecting and cooling waste heat in the oxidized organic matter gas;a condensed water collecting step for collecting condensed water generated from the exhaust cooling step;anda condensed water discharging step for filtering particulates in finally discharged condensed water and discharging the condensed water to a plant liquid release system (LRS). 2. The method of claim 1, wherein the method further comprises, before the liquid waste pyrolysis/oxidation step:a dissolving/concentrating step for dissolving and concentrating the PVA protective products;a concentrate first filtering step for separating particulates existing in the PVA concentrate by a filter;anda second filtering step. 3. The method of claim 2, wherein in the concentrate first filtering step, large-size particles are removed by the filter and a pump rotating at high speed is used to sufficiently mix the organic matter with an oxidant, thereby oxidizing the PVA solution. 4. The method of claim 1, wherein in the liquid waste pyrolysis/oxidation step, a pyrolysis/oxidation reactor is operated at a temperature in order to oxidize the PVA solution. 5. The method of claim 1, wherein in the catalytic oxidation step, a catalytic oxidation reactor is operated at a temperature in order to oxidize the PVA solution. 6. The method of claim 1, wherein in the catalytic oxidation step, a catalyst comprising platinum (Pt), palladium (Pd), and alumina (Al2O3) is used. 7. An apparatus for treating PVA protective products according to the method of claim 1, the apparatus comprising:a pyrolysis/oxidation reactor for liquid waste, in which organic matter in a filtrate treated by the dissolution-concentration tank is pyrolyzed and oxidized at a high temperature;a catalytic oxidation reactor for treating organic matter existing in an untreated gas among gas treated in the pyrolysis/oxidation reactor;a heat exchanger for collecting and cooling waste heat in the oxidized organic matter gas; anda condensed water storage tank for collecting condensed water generated from the heat exchanger. 8. The method of claim 1, further comprising:a radioactivity concentration analyzing step of a PVA solution whose radioactive materials are removed, and a concentrate storing step; anda disposal step for treating a concentrated non-radioactive PVA solution. 9. The method of claim 2, wherein a multi-reactor is connected to a heater tank for heating an inside of the multi-reactor in the PVA dissolving/concentrating step. 10. The method of claim 9, wherein the heater tank heats the multi-reactor while PVA of the protective products is firstly dissolved in a solution within the multi-reactor. 11. The method of claim 10, wherein the solution comprising PVA dissolved therein is concentrated so as to minimize a generation amount of liquid-state waste to be self-disposed. 12. The method of claim 9, wherein the heater tank allows purified water whose ionic particles are removed to indirectly heat the multi-reactor via a heating jacket. 13. The method of claim 12, wherein the purified water contained in the heater tank is formed into vapor of 100-130° C. by a heater. 14. The method of claim 9, wherein in the multi-reactor, during first dissolution of PVA, hydrogen peroxide and iron salt are introduced for causing a Fenton reaction, and hydroxyl radicals generated from the Fenton reaction facilitate dissolution of PVA. 15. The method of claim 9, wherein in the multi-reactor, during first dissolution of PVA, when 70 to 95% of PVA material is dissolved, hydrogen peroxide and an iron salt solution are introduced to cause a Fenton reaction. 16. The method of claim 14, wherein the hydrogen peroxide is introduced in an amount of 0.3 to 1 LH2O2/kgPVAprotective-clothes, and the iron salt solution is introduced in an amount of 0.1 to 0.5 Liron-salt-solution/kgPVAprotective-clothes. 17. The method of claim 14, wherein the iron salt solution is formed by introducing 6.25 mL of H2SO4 and 2.18 g of FeSO47H2O in a 500 mL volumetric flask, and filling distilled water up to 500 mL of the volumetric flask, followed by a purifying process for one hour. 18. The method of claim 2, wherein in the first filtering step, a filter with a diameter of 1 to 80 μm is used to firstly remove radioactive nuclides contained in the concentrate. 19. The method claim 2, wherein in the first filtering step and the second filtering step, a filter with a diameter of 0.2 to 80 μm is used to filter the concentrate. 20. The method of claim 8, wherein the disposal step for treating the PVA solution is carried out by any one of a concentrate self-disposal process or a concentrate dried-product incineration disposal process.