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:
mode of operation (i.e., performing its intended function) during the testing. For software-based systems, the system should have functioning software and diagnostics that are representative of those used in actual operation. Table 1 Specific Regulatory Positions for EMC Guidance Regulatory Position EMC Issue Addressed Standards Endorsed Comments/Conditions 1 General EMC program Scope and applicability of guidance defined. Key considerations identified for confirming operating envelopes, configuring and conducting testing, and treating portable emitters. 2 EMI/RFI limiting practices IEEE Std. 1050-2004 Endorsed. 3, 4 EMI/RFI emissions and susceptibility (radiated, conducted power line and conducted signal line) testing MIL-STD-461G IEC 61000-3 IEC 61000-4 IEC 61000-6 Selected MIL-STD-461G and IEC 61000 test methods endorsed. Operating envelopes specified. Clarifications on application and conditions for omission provided. 5 SWC testing IEEE Std C62.41.1-2002 IEEE Std C62.41.2-2002 IEEE Std C62.45-2002 IEC 61000-4 Selected IEEE Std C62.41.2-2002 surge test waveforms endorsed. Related IEEE Std C62.45-2002 test methods endorsed. Selected IEC 61000-4 surge test waveforms and test methods endorsed. SWC withstand levels specified with exception1 taken to level in IEEE Std C62.41.2-2002. 6 Electrostatic discharge testing IEC 61000-4 IEC 61000-4-2 test method endorsed. Test levels specified. 7 Documentation Essential EMC documentation identified. Exclusion zones should be established through administrative controls to prohibit the activation of portable EMI/RFI emitters (e.g., welders and handheld communication devices) in areas where safety-related I&C systems have been installed. An exclusion zone is defined as the minimum distance between the point of installation of safety-related I&C equipment and the location of portable EMI/RFI emitters. The size of the exclusion zones should be site-specific and depend on the effective radiated power and antenna gain of the