Document: NRC Regulatory Guide
Document ID: 921f4c90-482e-4f9e-a835-28839c357dcb
Document Type: regulatory_guide
Title: Flexible Mitigation Strategies for Beyond-Design-Basis Events + HISTORY - HISTORY 11/2015 – DG-1301 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1316/ML13168A031.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.226
CFR Part: 
CFR Title: 

Content:
atisfy that element of reasonable protection. 3.2. Protection from External Hazards Sections 5 through 9 of NEI 12-06, Rev. 1A discuss methodologies for the protection of the equipment. The methods of protection comprise: 1) physical protection of the equipment; 2) protection by relocation of the equipment from a position in which a licensee may have indication of an impending hazard; and 3) provision of multiple, redundant pieces of equipment or methods to accomplish a function, stored in diverse locations in order to provide assurance that at least one method of accomplishing that function will survive an event of a localized nature such as a tornado missile impact. Staff Position: Sections 5 through 9 and Appendix B of NEI 12-06, Rev. 1A provide an acceptable method for protecting the equipment from the effects of external hazards in order to satisfy that element of reasonable protection. 3.3. Deployment of Equipment Sections 5 through 9 of NEI 12-06, Rev. 1A discuss methods for transporting the equipment from the location in which it is stored to the location in which it would be used. These sections additionally discuss the connection of the equipment to structures, systems, and components (SSCs) necessary for completion of the deployment of the equipment from storage to a state in which it can supplement the functions of the installed SSCs. Staff Position: Sections 5 through 9 and Appendix B of NEI 12-06, Rev. 1A provide an acceptable method for deployment of the equipment in order to satisfy that element of reasonable protection. 3.4. Programmatic Controls for Unavailability Section 11.5.3 of NEI 12-06, Rev. 1A discusses the programmatic controls for equipment and connections between that equipment and permanently installed SSCs. These controls include limited time periods in which the equipment and connection points may be unavailable for any reason, with the duration of the acceptable time period being based on the ability of the licensee to accomplish the