title: Revision of testing criteria for air cleaning unit of renovated APR-1000 and APR-1400 NPPS.
abstract: Designing Air Cleaning Units (ACU) of an Engineered Safety Feature and normal atmosphere clean-up system at the renovated APR-1000 and APR-1400 NPP, and fuel cycle facilities in Korea, is required to meet the standards of ASME AG-1 (1997), ASME N509/N510 (1989) and KEPIC-MH (2001) to enhance the removal efficiency of aerosols and particulates from the effluents. The revised ACU testing criteria are allowed to use alternative challenge agents of the dioctyl phthalate and Refrigerant-11 for in situ testing of high efficiency particulate air filters and adsorption banks. The operability testing time of engineered safety feature (ESF) trains was changed from 10 h to 15 min. The activated carbon in adsorption banks should undergo laboratory tests at a temperature of 30 °C and relative humidity 95 %. The removal criteria of methyl iodide should be over 99.5 % for ESF and 99 % for normal systems. This paper provides the background of the changed criteria for designing and testing of the ACU system in nuclear facilities.
authors.affiliation: Radiation Safety Research Department, Korea Institute of Nuclear Safety, 19 GuseongDong, YuseongKu, Daejeon 305-338, South Korea. k504jsy@kins.re.kr
authors.forename: Seung-Young
authors.initials: SY
authors.lastname: Jeong
mesh_terms: D000396:Air Pollutants, Radioactive / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control*; D005374:Filtration / Q000295:instrumentation / Q000379:methods* / Q000592:standards*; D055848:Nuclear Power Plants; D011482:Protective Devices / Q000592:standards*
chemical_list: D000396:Air Pollutants, Radioactive