Document: NUREG-0800
Document ID: 4e771d51-141e-46e6-8ec9-fd098a4b1db7
Document Type: srp
Title: STRUCTURES, SYSTEMS, AND COMPONENTS TO BE PROTECTED FROM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0704/ML070460362.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.5.2
CFR Part: 
CFR Title: 

Content:
riterion applies directly to the assessment of important safety-related SSCs that may be affected. RG 1.115 describes methods acceptable to the NRC staff for identification and protection of important safety-related SSCs from the effects of missiles generated by turbine failure. Cumulative failure data for conventional plants indicate that the protection of important safety-related SSCs from the effects of missiles is an appropriate safety consideration. RG 1.117 describes a method acceptable to the NRC staff for determining which SSC should be protected from external missiles generated by tornados. The selection of SSCs to be protected is made to keep offsite exposures from exceeding an appropriate fraction of 10 CFR Part 100 offsite dose guidelines. Limits based upon an appropriate fraction ensures protection for events not as severe as design-basis events but with a higher probability of occurrence. Protecting important safety-related SSCs from externally-generated missiles secures the integrity of the reactor coolant pressure boundary, the capability to shut down the reactor and maintain it in a shutdown condition, and the capability to prevent significant uncontrolled release of radioactivity. 3.5.2-5 Revision 3 - March 2007 III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. The procedures set forth below are used during the construction permit review in determining whether the applicant's list of SSCs that require protection from externally-generated missiles is complete and meets the acceptance criteria in subsection II of this SRP section. For operating license