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:
conducted susceptibility testing for signal leads in safety-related I&C systems in nuclear power plants are presented in Tables 13 and 14. Table 13 DG-1333, Page 21 lists the EMI/RFI test methods for signal leads in MIL-STD-461G, while Table 14 lists the corresponding methods in f IEC 61000-4. These test methods are acceptable to test for susceptibility to conducted interference resulting from noise coupling through interconnecting signal leads. Table 13 MIL-STD-461E Conducted Susceptibility Test Methods-Signal Leads Method Description CS114 Conducted susceptibility, high-frequency, 10 kHz to 30 MHz CS115 Conducted susceptibility, bulk cable injection, impulse excitation CS116 Conducted susceptibility, damped sinusoidal transients, 10 kHz to 100 MHz C = conducted and S = susceptibility Table 14 IEC 61000-4 Conducted Susceptibility Test Methods-Signal Leads Method Description 61000-4-4 Electrical fast transient/burst immunity test 61000-4-5 Surge immunity test 61000-4-6 Immunity to conducted disturbances, induced by radio-frequency fields, 150 kHz to 80 MHz 61000-4-12 Oscillatory waves immunity test 61000-4-16 Test for immunity to conducted, common mode disturbances in the frequency range 0 Hz to 150 kHz The MIL-STD-461 test methods listed in Table 13 have related operating envelopes that serve to establish test levels for signal leads. General operating envelopes that are acceptable to the NRC staff are shown in Table 15. Likewise, acceptable signal lead operating envelopes for the IEC 61000-4 test criteria listed in Table 14 have been identified in Table 16 and are comparable to their corresponding MIL-STD counterparts. Note that the operating envelope is based on the location of signal lines; in this context, the maximum EMI/RFI field strength postulated for a specific location is called the “withstand level” at that location. Most locations in the interior of a facility, which are typical for signal leads, correspond to the Category B surge withstand