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:
in: • NUREG/CR-5941, “Technical Basis for Evaluating Electromagnetic and Radio- Frequency Interference in Safety-Related I&C Systems.” • NUREG/CR-6431, “Recommended Electromagnetic Operating Envelopes for Safety- Related I&C Systems in Nuclear Power Plants.” • NUREG/CR-5609, “Electromagnetic Compatibility Testing for Conducted Susceptibility Along Interconnecting Signal Lines.” • NUREG/CR-6782, “Comparison of U.S. Military and International Electromagnetic Compatibility Guidance.” • ORNL/SPR-2015/485, “Task 2–Limits for High-Frequency Conducted Susceptibility Testing–CS114 (NRCHQ6014D0015)” (Ref. 20). • ORNL/SPR-2015/254, “Task 4–EMI/RFI Issues Potentially Impacting Electromagnetic Compatibility of I&C Systems (NRCHQ6014D0015)” (Ref. 21) • ORNL/SPR-2016/108, “Task 5–Technical Basis for Electromagnetic Compatibility Regulatory Guidance Update (NRCHQ6014D0015)” (Ref. 22) DG-1333, Page 7 Finally, the above reports include documentation of the basis for the general operating envelopes cited in this RG. Of particular note is that ORNL/SPR-2015/485 documents the technical basis for the significantly revised operating envelope for the high-frequency conducted susceptibility test (CS114) associated with the U.S. Department of Defense test standard. Overall, the operating envelopes are applicable for locations within a nuclear power plant where safety-related I&C systems either are, or are likely to be, installed. These locations include control rooms, remote shutdown panels, cable spreading rooms, equipment rooms, relay rooms, auxiliary instrument rooms, and other areas (e.g., the turbine deck) where safety-related I&C system installations are planned. A comparable technical basis should be established to support the use of modified or different electromagnetic operating envelopes (e.g., lower site-specific envelopes). Harmonization with International Standards It is the NRC’s policy to harmonize with international