BS ISO 20890-5:2020 pdf download – Guidelines for in-service inspections for primary coolant circuit components of light water reactors
5.1.1 Task of NDT personnel
NDT personnel [4] have a great responsibility, not only with respect to their employers or contractors but also under the rules of good workmanship. The NDT personnel may be independent and free from economic influences with regard to his test results, otherwise the results are compromised. The NDT personnel shall 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 NDT personnel is responsible for all interpretations of test results carrying his signature. NDT 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.
Any personnel certification requirements invoking relevant national NDT personnel certification schemes (e.g. ISO 9712) should be validated according to Table 1. Any additional personnel training requirements should also be specified in the qualification dossier. If no relevant scheme exists or if extra personnel qualification is needed, the qualification body should 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 NDT procedure also includes the necessary requirements. The qualification procedure should 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 limits of the test methods and have knowledge about the characteristic appearances of operationally induced defects. 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 operating personnel for test robots and eddy current test devices shall be trained for the special requirements of the work to be performed. In particular, they shall have adequate experience in the implementation of eddy current tests and knowledge about the test object in respect to this testing. The analysts shall be trained for the special requirements of the work to be performed and have experience in the analysis and evaluation of indications as well as knowledge of the test object and the characteristic appearance of indications. Test personnel performing NDT 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.