Document: NRC Regulatory Guide
Document ID: 37f53017-d71c-4f3c-a2a4-ab67a8270066
Document Type: regulatory_guide
Title: Pre-Earthquake Planning, Shutdown, and Restart of a Nuclear Power Plant Following an Earthquake (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1826/ML18268A185.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.166
CFR Part: 
CFR Title: 

Content:
inspection after an earthquake unless the applicant specifically selects it as a design input. response spectrum A plot of the maximum responses (acceleration, velocity, or displacement) of idealized single-degree-of-freedom oscillators as a function of the natural frequencies of the oscillators for a given damping value. The response spectrum is calculated for a specified input vibratory motion. DG-1337, Page 11 safe-shutdown earthquake ground motion The vibratory ground motion for which certain SSCs are designed to remain functional. These SSCs are those necessary to ensure the following: • the integrity of the reactor coolant pressure boundary • the capability to shut down the reactor and maintain it in a safe-shutdown condition • the capability to prevent or mitigate the consequences of accidents that could result in potential offsite exposures of nuclear radiation exceeding allowable amounts standard design A design for which the NRC has issued a standard design approval. standard design certification or design certification A standard design for a nuclear power facility that has been certified as a rule in 10 CFR Part 52. spectral acceleration Peak acceleration response of an oscillator as a function of period or frequency and damping ratio when subjected to a vibratory motion. spectral velocity Peak velocity response of an oscillator as a function of period or frequency and damping ratio when subjected to a vibratory motion. DG-1337, Page 12 REFERENCES3 1. U.S. Code of Federal Regulations (CFR), “Domestic Licensing of Production and Utilization Facilities,” Part 50, Chapter 1, Title 10, “Energy.” 2. CFR, “Licenses, Certifications, and Approvals for Nuclear Power Plants,” Part 52, Chapter 1, Title 10, “Energy.” 3. CFR, “Reactor Site Criteria,” Part 100, Chapter 1, Title 10, “Energy.” 4. U.S. Nuclear Regulatory Commission (NRC), Regulatory Guide (RG) 1.12, “Nuclear Power Plant Instrumentation for Earthquakes,” Washington, DC.