Document: NRC Regulatory Guide
Document ID: 22ccfd5e-c5d8-4615-a02c-32369aa9f533
Document Type: regulatory_guide
Title: Acceptability of Probabilistic Risk Assessment Results for Risk-Informed Activities (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1930/ML19308B636.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.200
CFR Part: 
CFR Title: 

Content:
nami, include, but are not necessarily limited to: • River and stream overflow High Wind: Strong winds resulting in dynamic loading or missiles on SCCs causing functional failure. Hazards that could potentially result in high wind include: Hurricane (Tropical Cyclone) Winds Severe winds developed from a tropical depression resulting in missiles or dynamic loading on SSCs. Secondary hazards resulting from a hurricane, include, but are not necessarily limited to: • Tornado Straight Wind A strong wind resulting in missiles or dynamic loading on SSCs that is not associated with either hurricanes or tornadoes. Tornado A strong whirlwind that results in missiles or dynamic loading on SSCs. Tectonic Activity (see Note 1) Severe force that changes the structure of the earth’s crust causing SSC functional failure. Hazards that could potentially result in tectonic include Seismic Activity Sudden ground motion or vibration of the Earth as produced by a rapid release of stored-up energy along an active fault. Secondary hazards resulting from seismic activity, include, but are not necessarily limited to • Avalanche (both rock and snow) • Dam failure • Industrial accidents • Landslide • Seiche • Tsunami • Vehicle accidents Volcanic Activity Opening of earth’s crust resulting in tephra (i.e., rock fragments and particles ejected by volcanic eruption), lava flows, lahars (i.e., mud flows down volcano slopes), volcanic gases, pyroclastic flows (i.e., fast-moving flow of hot gas and volcanic matter moving down and away from a volcano), and landslides. Indirect impacts include distant ash fallout (e.g., 10s to potentially 1,000s of miles away). Secondary hazards resulting from volcanic activity, include, but are not necessarily limited to: • Seismic • Fire DG-1362, Appendix D, Page D-4 Hazard Group/ Hazard Direct or Secondary Impact of Hazard Note 1 Seismic activity and volcanic activity are hazards in the tectonic activity hazard group. However,