BS ISO 20890-2-2020 Guidelines for in-service inspections for primary coolant circuit components of light water reactors Part 2: Magnetic particle and penetrant testing.
4.1.1 Task of NDT personnel
NDT personnellal have a great responsibility, not only with respect to their employers or contractors but also under the rules of good workmanship. The NDT personnel shall be independent and free from economic influences with regard to his test results, otherwise the results may be compromised. The NDT personnel should be aware of the importance of his signature and the consequences of incorrect test results for safety, health and environment. Under legal aspects, the falsification of certificates is an offence and judged according to the national legal regulations. A tester may find himself in a conflicting situation about his findings with his employer, the responsible authorities or legal requirements.
Finally, the NOT personnel is responsible for all Interpretations of test results carrying his signature. NOT personnel should never sign test reports beyond their certification (see Table 1).
NOTE For reasons of readability, the male form is used with personal names, however the female form is also always intended.
4.1.2 Personnel requirements
The test personnel comprise test inspectors and the test supervisor.
Those personnel, using qualified non-destructive testing (NOT) procedures and equipment. shall be qualified through one or any combination of the following:
— certification through a national NOT personnel certification scheme;
— theoretical and/or open trials.
Any personnel certification requirements invoking relevant national NDT personnel certification schemes (e.g. ISO 9712) shall be validated according to Table 1. Any additional personnel training requirements shall also be specified in the qualification dossier.
If no relevant scheme exists or if extra personnel qualification is needed, the qualification body shall determine the additional practical and theoretical examinations needed beyond those in the national certification scheme, include these in the qualification procedure and ensure that the N DT procedure also includes the necessary requirements. The qualification procedure shall describe the proposed system.
The test supervisor is responsible for the application of the NDT qualified system and shall have the knowledge required for his tasks as well as sufficient knowledge of the application options and limitations of the test methods and have knowledge about the characteristic appearances of operationally induced faults. Indications beyond the evaluation limit shall be evaluated by the test supervisor, who has the requisite experience in respect to the test object, test assignment, test method and device system.
The test inspectors shall have the skills to perform the work they are to carry out. In particular, they shall have adequate experience in the implementation of magnetic particle testing. penetrant testing and knowledge about the test object in respect to this.
Test personnel performing NOT and the evaluation of the results shall be qualified in accordance with ISO 9712 or equivalent at an appropriate level in the relevant industrial sector.BS ISO 20890-2 pdf download.