ISO 20890-4:2020 轻水反应堆主冷却剂回路元件的在用检查指南 第4部分：视觉测试

标准编号：ISO 20890-4:2020

中文名称：轻水反应堆主冷却剂回路元件的在用检查指南 第4部分：视觉测试

英文名称：Guidelines for in-service inspections for primary coolant circuit components of light water reactors — Part 4: Visual testing

发布日期：2020-06

标准范围

This document gives guidelines for pre-service inspection (PSI) and in-service inspections (ISI) for
reactor coolant circuit components of light water reactors and their installations as direct or remote
visual testing in the form of a
— general visual testing (overview), or
— selective visual testing (specific properties).
This document is also applicable to other components of nuclear installations. The requirements in this
document focuses on remote (mechanized) visual testing, but also specifies global requirements for
direct visual testing. For specific requirements for direct visual testing of welds see ISO 17637.
This document is not applicable to tests in respect to the general state that are carried out in conjunction
with pressure and leak tests and regular plant inspections.
This document specifies test methods that allow deviations from the expected state to be recognised,
requirements for the equipment technology and test personnel, the preparation and performance of the
testing as well as the recording.
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.

标准预览图