Document: NUREG-0800
Document ID: 7d53889c-d236-4e84-9579-a2beb4716167
Document Type: srp
Title: SEISMIC CLASSIFICATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070296.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.2.1
CFR Part: 
CFR Title: 

Content:
E, a designed-in safety margin is provided for bringing the reactor to a safe, shutdown condition, while also reducing potential offsite doses from seismic events. Regulatory Guide 1.151 positions C.2 and C.3 provide guidance for the proper seismic classification of safety-related instrumentation sensing lines. Application of this guidance ensures that the instrument sensing lines used to actuate or monitor safety- related systems will be appropriately classified and will be capable of withstanding the effects of the SSE. Compliance with the above requirements and guidance assures that the SSCs important to safety that are required to function during an SSE are properly classified as seismic Category I and will function during such events enabling accomplishment of the safety functions described above. 3. Compliance with General Design Criterion 61 requires that radioactive waste management systems, and other systems which may contain radioactivity, be designed to assure adequate safety under normal and postulated accident conditions. Postulated conditions considered with respect to seismic design and classification of SSCs include losses of SSC integrity and potential radioactive releases as a result of seismic events. Regulatory Guide 1.143 provides acceptable methods and guidance relative to seismic design and classification for radioactive waste management SSCs. This Regulatory Guide provides classification information and design criteria to assure that components and structures used in radioactive waste management systems are designed, constructed, installed and tested in a manner that protects the health and safety of the public and the plant operating personnel. Designing and constructing the radioactive waste management SSCs to meet the requirements of GDC 61 and the guidance on seismic design and classification contained in Regulatory Guide 1.143 provides assurance that SSCs containing radioactivity will be properly classified and radiation exposures as a