Document: NRC Regulatory Guide
Document ID: cfc61809-5745-460f-8a26-13c168659924
Document Type: regulatory_guide
Title: Identification and Characterization of Seismic Sources and Determination of Safe Shutdown Earthquake Ground Motion
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740084.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.165
CFR Part: 
CFR Title: 

Content:
cure geologic evidence of past activity along a tectonic structure. In such cases, the analysis of evidence elsewhere along the structure can be used to evaluate its characteristics in the vicinity of the site (Refs. D.12 and D.23). D.2.4 Geochronology An important part of the geologic investigations to identify and define potential seismic sources is the geo chronology of geologic materials. An acceptable clas sification of dating methods is based on the rationale described in Reference D.24. The following tech niques, which are presented according to that classifi cation, are useful in dating Quaternary deposits. A de- tailed discussion of each of these methods and their application to nuclear power plant siting is presented in a document that is currently under preparation and will be published as a NUREG.1 D.2.4.1 0 0 0 D.2.4.2 0 S 0 0 0 0 D±4.4 S 0 0 Sidereal Dating Methods Dendrochronology Varve chronology Schlerochronology Isotopic Dating Methods Radiocarbon Cosmogenic nuclides -M36 , 1OBe, 21pb, and 26A1 Potassium argon and argon-39-argon-40 Uranium series - 234U-23°'h and 235U 231Pa 2 10Lead Uranium-lead, thorium-lead Radiogenic Dating Methods Fission track Luminescence (TL and OSL) Electron spin resonance (ESR) D.2.4.5 Chemical and Biological Dating Methods 0 0 0 D.2.4.6 S 0 0 Amino acid racemization Obsidian and tephra hydration Lichenometry Geomorphic Dating Methods Soil profile development Rock and mineral weathering Scarp morphology D.2.4.7 Correlation Dating Methods * Paleomagnetism (secular variation and re versal stratigraphy) • Tephrochronology 0 S Paleontology (marine and terrestrial) Global climatic correlations - Quaternary deposits and landforms, marine stable iso tope records, etc. 1NUREG/CR-5562, "Quaternary Geochronology: Applications in Qua. ternary Geology and Paleoseismology," Editors H.S. Noller, LM. Sow. era, and W.R. Lettis, will be published in the spring of 1997. Copies will be available for inspection or copying for a fee from