Document: NRC Regulatory Guide
Document ID: 99fe445b-c440-4921-ba8f-841c8f236046
Document Type: regulatory_guide
Title: Nuclear Power Plant Instrumentation for Earthquakes + HISTORY - HISTORY 09/2016 – DG-1332 , Proposed Revision 3 04/2015 – Periodic Review on Revision 2 – Revise 02/1995 – DG-1033, Third Proposed Revision 2 11/1992 – DG-1016, Second Proposed Revision 2 07/1981 – Draft MS 140-5 , First Proposed Revision 2 (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1610/ML16104A220.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.12
CFR Part: 
CFR Title: 

Content:
) Three three-component instruments when the foundation supports the containment/internal structure, and other Seismic Category I structures and forms a “nuclear island.” The instruments should be appropriately placed to record the rocking or torsional responses predicted by the analyses; or (c) One instrument when the foundation supports the containment/internal structure, and other Seismic Category I structures, denoted a “nuclear island;” and DG-1332, Page 7 justification is provided that the rocking or torsional responses predicted by the response analyses are insignificant. (3) Two higher elevations (excluding the foundation) on a structure inside the containment (i.e., a structure internal to the primary or secondary containment and supported by the containment foundation). (4) Any Seismic Category I structure foundation included in a certified standard design or facility where the expected response is different from that of the containment structure. (5) An elevation (excluding the foundation) on a Seismic Category I structure selected in 4 above. (6) An elevation in a non-containment Seismic Category I structure supported by the containment foundation. (7) Any Seismic Category I structure foundation included in a certified standard design or facility. (8) A higher elevation in the instrumented Seismic Category I structure selected in (7). (9) If necessary, alternatives to sensor locations 2 through 8 that are needed to support other parts of the instrumentation and measurement guidance in this guide should be selected and justified by the nuclear plant designer or applicant/licensee to ensure that comparisons can be made with the calculated vibratory responses used in the certified standard design or facility. 1.3 Instrument Location Considerations The specific locations for instrumentation should be determined by the nuclear plant designer or applicant/licensee to obtain the most pertinent information consistent with maintaining occupational