00487naa#a2200157#i#450# EN\\bibl\43343 20250116004459.4 1609-3178 20210514b2021####ek#y0engy0150####ca RU Requirements for Accreditation (Appraisal) of NDT Laboratories in Nuclear Power Industry Journal article Saint-Petersburg LLC SVEN 2021 2 с. Journal article local Polkovnikov Aleksey Vasilevich naukaru.ru