Document: NUREG-0800
Document ID: 80fe9eee-2d6e-4a7e-b7dd-ec23aab2d39f
Document Type: srp
Title: STRATEGIES AND GUIDANCE TO ADDRESS LOSS OF LARGE AREAS OF
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1211/ML121110138.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.4
CFR Part: 
CFR Title: 

Content:
on factor to give SG level. Staff Position Applicants for COLs or operating licenses utilizing a design similar to current operating PWRs that adopt strategies in Section 3.3.2, 3.3.3, or 3.3.4 of NEI 06-12, Revision 3, or similar strategies should determine whether or not a portable means of measuring SG level is necessary to provide the controls on degree and rate of SG depressurization or makeup rate necessary for the strategy to be successful, and if so, include SG level measurement part of the strategy. The strategies should be described in the application in a manner consistent with guidance in Appendix D of NEI 06-12, Revision 3 and subsequently implemented in the site procedures by the licensee. 3. The terms “damage footprint” and “target area” are used interchangeably and are not clearly defined in NEI 06-12, Revision 3. There was considerable variation in the interpretation of this definition among current licensees. In addition, the guideline 19.4-19 Revision 0 – May 2013 “approximately 100 yards or more” was not consistently interpreted by current licensees. During inspections at licensed power reactor sites, many licensees expressed their desire for a more comprehensive definition of the “damage footprint” or “target area” and how the 100 yards should be measured. Staff Position As a general rule, the 100 yard stand-off distance should be measured from the outside edge of the target area, which in many cases will be the outside wall of a building. Tools, adapters, test equipment, instruments, and radiation monitoring equipment that are intended to be used for multiple strategies should be stored outside the damage footprint/target area for all strategies. Other tools, adapters, test equipment, instruments, and radiation monitoring equipment that are intended to be used for a specific strategy may be stored in the vicinity of the area where they will be used, or where applicable, left permanently installed on the system being