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:
ding and trailing edges of each individual pulse. Individual pulses occur in bursts of 15 ms duration. The peak value of the individual EFT pulses is given in Table 23. For the IEC test, the withstand levels correspond to Level 3 and Level 4 for the low and elevated surge conditions, respectively. During the performance of the test, the equipment under test should not exhibit any malfunction or degradation of performance beyond specified operational tolerances when subjected to the EFT pulses. Acceptable performance of the equipment under test should be defined in the test plan by the end user or testing organization according to the applicable equipment, subsystem, or system specifications. DG-1333, Page 30 Figure 5.4 Waveform of the EFT Pulse Figure 5.5 Pattern of EFT Bursts 6. Electrostatic Discharge Testing The electrostatic discharge (ESD) immunity test method IEC 61000-4 is acceptable to the NRC staff for performing ESD withstand testing of safety-related I&C systems intended for installation in nuclear power plants. Acceptable limits are given for the test in the form of identified operating envelopes. IEC Std. 61000-4-2, “Testing and Measurement Techniques - Electrostatic Discharge Immunity Test” (Ref. 37), provides a test method that can be used to establish the withstand capability of electrical and electronic equipment subjected to static electricity discharges, i.e., the sudden transfer of charge between two objects at differing electrostatic potential. It addresses the test levels, setup, equipment, and procedures for testing electrical and electronic equipment to assure their immunity to electrostatic discharge. DG-1333, Page 31 The test voltage to be applied depends on the environment and installation conditions. Contact discharge refers to the method of testing in which the electrode of the test generator comes into contact with the equipment under test and the discharge is actuated by the discharge switch within the generator. By contrast, air