This document gives guidelines for pre-service-inspections (PSI) and in-service inspections (ISI) with mechanized ultrasonic test (UT) devices on components of the reactor coolant circuit of light water reactors. This document is also applicable on other components of nuclear installations.<\/p>\n
Mechanized ultrasonic inspections are carried out in order to enable an evaluation in case of<\/p>\n
\u2014 fault indications (e.g. on austenitic weld seams or complex geometry),<\/p>\n
\u2014 indications due to geometry (e.g. in case of root concavity),<\/p>\n
\u2014 complex geometries (e.g. fitting weld seams), or<\/p>\n
\u2014 if a reduction in the radiation exposure of the test personnel can be attained in this way.<\/p>\n
Ultrasonic test methods are defined for the validation of discontinuities (volume or surface open), requirements for the ultrasonic test equipment, for the preparation of test and device systems, for the implementation of the test and for the recording.<\/p>\n
This document is applicable for the detection of indications by UT using normal-beam probes and angle-beam probes both in contact technique. It is to be used for UT examination on ferritic and austenitic welds and base material as search techniques and for comparison with acceptance criteria by the national referencing nuclear safety standards. Immersion technique and techniques for sizing are not in the scope of this document and are independent qualified.<\/p>\n
NOTE Data concerning the test section, test extent, inspection period, inspection interval and evaluation of indications is defined in the applicable national nuclear safety standards.<\/p>\n
Unless otherwise specified in national nuclear safety standards the minimum requirements of this document are applicable. This document does not define:<\/p>\n
\u2014 extent of examination and scanning plans;<\/p>\n
\u2014 acceptance criteria;<\/p>\n
\u2014 UT techniques for dissimilar metal welds and for sizing (have to be qualified separately);<\/p>\n
\u2014 immersion techniques;<\/p>\n
\u2014 time-of-flight diffraction technique (TOFD).<\/p>\n
It is recommended that UT examinations are nearly related to the component, the type and size of defects to be considered and are reviewed in specific national inspection qualifications.<\/p>\n","protected":false},"excerpt":{"rendered":"
Guidelines for in-service inspections for primary coolant circuit components of light water reactors \u2014 Part 1: Mechanized ultrasonic testing<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n ISO<\/b><\/a><\/td>\n 2020-06<\/td>\n 40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":604599,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[462,2634],"product_tag":[],"class_list":{"0":"post-604585","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-27-120-10","7":"product_cat-iso","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/604585","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/604599"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=604585"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=604585"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=604585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}