Document: NUREG-0800
Document ID: 711747d3-335d-42bb-b30d-17cc0f6162ed
Document Type: srp
Title: SEISMIC INSTRUMENTATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340571.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.4
CFR Part: 
CFR Title: 

Content:
ram is checked to assure that the instru- mentation is in accordance with the guidelines of Regulatory Guide 1.12. 3.7.4-4 Rev. 1 - July 1981 Any differences between the proposed and the guide seismic instrumentation, which have not been adequately justified, are identified and the applicant is informed of the need for additional technical justification. 2. Location and Description of Instrumentation At the operating license stage, the locations and descriptions of the seismic instrumentation are reviewed to determine that these are in accord- ance with the acceptance criteria of subsection II.2 of this SRP section. If the instrumentation provided is judged to be insufficient, the need for additional instrumentation is transmitted to the applicant. 3. Control Room Operator Notification The seismic instrumentation is checked to verify that the seismic switch located at the foundation of the containment structure or in the free field is connected to event indicators that are located in the control room, so that a signal is given when the preset threshold level is exceeded. If there is no provision for both audio and visual signals in the appli- cant's seismic instrumentation plan, the applicant is so informed with a request for compliance. 4. Comparison of Measured and Predicted Responses The criteria and procedures that will be used to compare measured responses of Category I structures and selected components in the event of an earth- quake with the results of the seismic system and subsystem analyses are checked to verify that sufficient {nformation as specified in subsection I.4 of this SRP section is included. Any deficiency in the required information is identified and the applicant is requested to provide further information. 5. Inservice Surveillance The inservice inspection program described by the applicant is reviewed to assure that the acceptance criteria of subsection II.5 of this SRP section are met. IV. EVALUATION FINDINGS The reviewer verifies that