Document: NUREG-0800
Document ID: 71cb532b-b4ee-4e32-b83f-f1f4412193fb
Document Type: srp
Title: SEISMIC INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1230/ML12304A031.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.4
CFR Part: 
CFR Title: 

Content:
o meet the requirements of the NRC’s regulations identified above are as follows for the review described in this SRP section. The SRP is not a substitute for the NRC’s regulations, and compliance with it is not required. However, an applicant is required to identify differences between the design features, analytical techniques, and procedural measures proposed for its facility and the SRP acceptance criteria and evaluate how the proposed alternatives to the SRP acceptance criteria provide acceptable methods of compliance with the NRC regulations. The type, locations, operability, characteristics, installation, actuation, remote indication, and maintenance of seismic instrumentation should meet the guidance discussed below. Where an applicant proposes specific details different from these, acceptability should be based upon meeting applicable regulations, as stated above, consistent with current proven technologies and intended use of the recorded information. 3.7.4-4 Draft Revision 3 - August 2013 1. Comparison with RG 1.12. The seismic instrumentation program is considered to be acceptable if it is in accordance with guidance provided in RG 1.12. The bases for elements of the proposed seismic instrumentation program that differ from RG 1.12 must be provided. This guide recommends installation of digital time-history accelerographs at appropriate locations in order to provide time history data on the seismic response of the free-field, containment structure, and other Seismic Category I structures. COL, DC, CP, and OL applicants should provide digital instrumentation with sufficient dynamic range, pre-event memory and sampling rate to accurately record the vibratory ground motion and enable the processing of data at the plant site within 4 hours of a seismic event. A triaxial time-history accelerograph should be provided at each of the locations specified in RG 1.12, such as at a free-field location, at the containment foundation and two other elevations on