IEC 62003:2020 pdf download – Nuclear power plants – Instrumention, control and electrical power systems – Requirements for electromagnetic compatibility testing.
5 EMC test requirements Nuclear instrumentation, control, and electrical equipment important to the safety of a nuclear plant (as defined in the IEC/IEEE 60780-323 standard) shall satisfy the requirements for emissions generated by the equipment and immunity to electromagnetic interference as documented in this document. Controlling the emissions from all types of equipment (important to safety and non-safety equipment) is necessary to ensure that the electromagnetic environment is bounded by the test levels recommended in this standard. Table 1 contains a list and description of the EMC immunity and emissions tests applicable to nuclear I&C and electrical equipment important to safety to be installed into a nuclear facility. These tests address the main types of electromagnetic disturbances found in a typical nuclear power plant environment and not all types of tests may be applicable for a particular piece of equipment or installation. Adequate technical justification for the elimination of particular tests should be provided in the EMC purchase specification, test plan, and/or test report. Further guidance regarding the applicability of the various tests, test levels, and frequency ranges can be found in IEC 61 000-6-5 (immunity for power station equipment) and IEC 61 000-6-7 (immunity for safety-related system in industrial locations). In the case of existing and installed equipment inside nuclear power plants, the requirements defined in this document may be aligned according to the state-of-the-art for EMC qualification testing valid during the time of installation. For such equipment, operational experience may be taken into account. The guidance in this document was developed for I&C equipment but may also be applied to electrical equipment. However, because of the unique nature of electrical (power) equipment, some additional considerations might be required. An example of these considerations is provided in Annex H.
6 Electromagnetic environment The typical locations covered by this document are found within nuclear power plants and similar nuclear facilities. The locations generally follow a typical power plant installation shown in Figure 2 based on IEC 61 000-6-5. In Figure 2, the solid lines do not represent physical boundaries between the areas where the equipment is installed, but indicate generic boundaries between electromagnetic environments. A majority of the I&C and electrical equipment covered under this document will be located in environments defined as interface type 2 meaning that it will not directly interface with the electrical process (medium and high voltage power distribution). For I&C and electrical equipment that does directly interface with the electrical process, the typical environment would be defined as interface type 3 in Figure 2. Therefore, the test levels specified in this document will be based upon the assumption that the equipment to be tested will be installed in these interface type 2 or interface type 3 areas of the plant. It should be noted that the electromagnetic environment within these interface type 2 and 3 (and other) areas can vary significantly depending on the specific plant location and installation/design practices. If the equipment will be installed in a more or less severe environment (or if the country specific standards are different), then the test levels can deviate from those presented in this document as long as an appropriately documented justification is provided.
7 Immunity testing 7.1 General Nuclear I&C and electrical equipment important to the safety of a nuclear plant shall satisfy the requirements for immunity to electromagnetic interference documented in Table 1 of this document. If an item is deemed to be inappropriate for the EUT, exemption shall be justified by consideration of operating conditions or other relevant factors and documented in the EMC test plan. The degrees of test severity and acceptance criteria that are established for nuclear I&C and electrical equipment emissions and immunity testing shall be documented in the EMC test plan and test report.