Document: NRC Regulatory Guide
Document ID: 82021804-a487-471b-a76c-095315525b53
Document Type: regulatory_guide
Title: Guidelines for Evaluating Electromagnetic and Radio-Frequency Interference in Safety-Related Instrumentation and Control Systems (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1628/ML16281A531.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.180
CFR Part: 
CFR Title: 

Content:
phones, etc.) will typically be greater than 1. Typical values for the gain of intentional transmitters might vary from 1.5 for a short dipole antenna to 3 for a monopole antenna, and to 6 for a horn antenna. 2. IEEE Std. 1050-2004 IEEE Std. 1050-2004 describes design and installation practices that are acceptable to the NRC staff to limit EMI/RFI and power surge-related effects on safety-related I&C systems employed in nuclear power plants. 3. EMI/RFI Emissions Testing The NRC staff concludes that specific test methods from MIL-STD-461G and IEC 61000-6 are acceptable for performing emissions testing of both safety-related I&C systems and non-safety-related I&C systems intended for installation in nuclear power plants. These test methods are identified in the guidance below and may be applied in the indicated combinations subject to the clarifications and conditions specified. Acceptable limits are given for each test in the form of identified operating envelopes. MIL-STD-461G contains test practices that can be applied to characterize EMI/RFI emissions. IEC 61000-6 also specifies test practices that can be applied to characterize EMI/RFI emissions for industrial environments. The specific test methods acceptable to the NRC staff for performing emissions testing are presented in Tables 2 and 3. Table 2 lists the EMI/RFI emissions test methods in MIL-STD- 461G, while Table 3 lists the corresponding criteria in IEC 61000-6-4, “Electromagnetic Compatibility (EMC) – Part 6: Generic Standards – Section 4: Emission standard for industrial environments” (Ref. 23). Either set of test methods should be applied in its entirety or in specified combinations subject to the clarifications and conditions identified in the guidance below. These test methods cover conducted (along power leads) and radiated interference emitted from equipment under test. DG-1333, Page 11 Table 2 MIL-STD-461G Test Methods for EMI/RFI Emissions Method Description CE101 Conducted emissions,