Document: NUREG-0800
Document ID: 80e66b61-f0ed-49db-ba0b-ba2b7a7a0d52
Document Type: srp
Title: BASIC GEOLOGIC AND SEISMIC INFORMATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0423/ML042390206.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.1
CFR Part: 
CFR Title: 

Content:
These first-round questions usually require the applicant to conduct additional investigations or to supply clarifying information. Questions may result from the reviewer's discovery of references not cited by the applicant that contain conclusions that are in conflict.with those made by the applicant. When the applicant provides insufficient data to support its interpretations and conclusions and there are reasonable, technically supported, more conservative alternative interpretations in the literature, 2.5.1-7 Rev. 3 - March 1997 the staff will request additional investigations, or require that the applicant adopt the more conservative interpretation. This phase of the Kt review will usually involve public meetings with the applicant to clarify questions and allow the applicant to present new data to justify its position. The applicant's responses to questions are reviewed and any remaining issues are settled either by a second round of questions or by staff positions. The third review phase is the staff evaluation of the applicant's responses to questions raised in the second phase. At the end of the third phase, the staff takes positions on all safety-related issues, either concurring with the applicant's positions or taking more conservative positions as may be necessary in the staff's view to assure the required degree of safety. A staff position is usually in the form of a requirement to provide confirmatory information or to design for a specific condition in a way that the staff considers to be sufficiently conservative and consistent with the requisites of Reference 2. When all safety issues have been resolved, the staff provides its input to the safety.evaluation report (SER). A staff position that has characterized licensing during the past two decades is that all Seismic Category I excavations are required to be geologically mapped by the applicant and examined by the staff before backfill is placed or concrete poured. These activities were usually