Document: NUREG-0800
Document ID: 383561fc-b739-42a6-b54f-40bbc4b47d03
Document Type: srp
Title: SEISMIC INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070322.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.4
CFR Part: 
CFR Title: 

Content:
neral Design Criterion 2, "Design Bases for Protection Against Natural Phenomena."28 DRAFT Rev. 2 - April 1996 3.7.4-8 3. 10 CFR Part 100, Appendix A, "Seismic and Geologic Siting Criteria for Nuclear Power Plants." 4. Regulatory Guide 1.12, "Instrumentation for Earthquakes."29 5. Electric Power Research Institute, "A Criterion for Determining Exceedance of the Operating Basis Earthquake," EPRI NP-5930, Palo Alto, California, July 1988.30 3.7.4-9 DRAFT Rev. 2 - April 1996 TABLE 3.7.4-1 SEISMIC INSTRUMENTATION REQUIREMENTS Instrumentation Triaxial Triaxial Response Triaxial Peak Seismic Time-History Spectrum Recorder Accelerograph Switch Accelerograph Location SSE 2.9 m/s over 2.9 m/s (0.3 over 2.9 m/s over 2.9 m/s over 2 (0.3 g) 2.9 m/s g) 2.9 m/s (0.3 g) 2.9 m/s (0.3 g) 2.9 m/s or less (0.3 g) or less (0.3 g) or less (0.3 g) or less (0.3 g) 2 2 2 2 2 2 2 25 I. Free Field 1*# 1*# II. Inside Containment Basement 1* 1* 1* 1* 1* 1* 1* At Elevation 1 1 Reactor Equip. Sup. }1 }1 }1* Reactor Piping Sup. Reactor Equipment 1 1 Reactor Piping 1 1 III. Outside Containment Cat. I Structure 1 1 1 Cat. I Equip. Sup. 1 Cat. I Piping Sup. }1 Cat. I Equipment 1 Cat. I Piping }1 1 * Control room readout. # May be omitted if soil-structure interaction is negligible. } Denotes either of the two locations. DRAFT Rev. 2 - April 1996 3.7.4-10 TABLE 3.7.4-2 SEISMIC MONITORING INSTRUMENTATION SURVEILLANCE REQUIREMENTS INSTRUMENT CHECK CALIBRATION L CHANNEL CHANNEL FUNCTIONA CHANNEL TEST 1. Triaxial Time-History Accelerographs M R SA 2. Triaxial Peak Accelerographs NA R NA 3. Triaxial Seismic Switches M R SA 4. Triaxial Response-Spectrum Recorders M R SA Legend: M = Monthly R = Refueling SA = Once per 18 months NA = Not Applicable SRP Draft Section 3.7.4 Attachment A - Proposed Changes in Order of Occurrence 3.7.4-11 DRAFT Rev. 2 - April 1996 Item numbers in the following table correspond to superscript numbers in the redline/strikeout copy of the draft SRP section. Item Source Description