Document: NUREG-0800
Document ID: 39eaebb5-884c-4731-895a-8df4686b7293
Document Type: srp
Title: REGULATORY TREATMENT OF NONSAFETY SYSTEMS FOR PASSIVE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1403/ML14035A149.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.3
CFR Part: 
CFR Title: 

Content:
f active systems needed to meet NRC regulations, Commission goals and the containment performance goal objectives, and (2) the risk-significance associated with failure to accomplish each R/A mission. Area of Review – Augmented Design Standards 1. The staff will verify that the applicant has met the following acceptance criterion: Safety functions required in the post 72-hour period following an accident can be accomplished with onsite equipment and supplies. 2. The staff will verify that the applicant has met the following acceptance criterion: RTNSS “B” SSCs and supporting equipment will be readily available for connection. Use of on- site equipment and supplies, including mobile equipment, is required in the 4 day post 72-hour period. Offsite equipment and supplies may be relied upon after the 7th day following an accident. 3. The staff will verify that the applicant has met the following acceptance criterion: To ensure that RTNSS “B” SSCs can withstand the effects of a SSE without the loss of capability to perform required functions, the SSCs should be analyzed, designed and constructed using the method and criteria for seismic Category II building structures defined in Chapter 3 of the FSAR. For these systems and components, the design of equipment anchorages must be consistent with the SSE design of equipment anchorages of Seismic Category I items and there should be no spatial interaction with 19.3-8 Revision 0 – June 2014 any other non-seismic SSCs that could adversely interact to prevent the functioning of the RTNSS “B” SSCs following an SSE; but no dynamic qualification of active equipment is necessary. 4. The staff will verify that the applicant has met the following acceptance criteria: (1) RTNSS “B” SSCs have been analyzed and designed to withstand the effects of high winds produced in hurricanes and tornadoes, including the effects of sustained winds, gusts, and associated wind-borne missiles and that applicants have used the