ISO 208905 is the fifth part of the multi-series European standard that specifies guidelines for pre-service inspection (PSI) and in-service inspections (ISI) by eddy current tests on non-ferromagnetic steam generator heating tubes of light water reactors, whereby the test is carried out using mechanized test equipment outwards from the tube inner side.
ISO 20890-5 does not explicitly cover eddy current testing of steam generator heating tube plugs as fixtures or components of the primary circuit. Due to the variety of shapes and sizes of steam generator heating tube plugs, it is necessary to utilize specially adapted test systems to qualify them.
Note: Data concerning the test section, test extent, inspection period, inspection interval and evaluation of indications is defined in the nuclear safety standards.
ISO 20890-5 on light water reactors is relevant to:
Pre-service inspection (PSI) and in-service inspections (ISI) by eddy current tests on non-ferromagnetic steam generator heating tubes of light water reactors are critical procedures that should be carried out by standard instructions and guidelines.
ISO 20890‑5 provide guidelines for pre-service inspection (PSI) and in-service inspections (ISI) by eddy current tests on non-ferromagnetic steam generator heating tubes of light water reactors, which extends the service life and efficiency of the light water reactor.
ISO 20890‑5 assists you in performing inspections by eddy current tests on non-ferromagnetic steam generator heating tubes of light water reactors for the localization of surface inhomogeneities and requirements for test personnel, test devices, test media, accessories, as well as optical auxiliaries, test preparation and execution, and test recording for the purpose to ensure the reliability and comparability of tests performed on non-ferromagnetic steam generator heating tubes of light water reactors.
Overall, ISO 20890-5 establishes guidelines for preservice and in-service inspection of reactor coolant circuits using automated ultrasonic testing devices which will benefit the users as they can inspect the components earlier than they will break down and therefore save from any accident conditions.
ISO 20890-5