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:
to achieve the appropriate pattern at Part 50 facilities currently operating. This was done in consideration of the feasibility and practicality of such an operation in a pool filled with many cycles of spent fuel, and possibly containing fuel storage racks with different designs. Such timing considerations are not considered necessary for newly designed spent fuel storage facilities. Applicants who choose to conform to the NRC-approved resolution are expected to include the following concept in procedures: “Where practical, consistent with safe fuel handling practices, the licensee should make every attempt to pre-configure the SFP to enable direct placement of the expended assemblies from the vessel to the final distributed fuel pattern”. Where this is not practical, licenses should distribute the fuel into the final pattern as soon as reasonably possible. Applicants should document whether they will use the NRC-approved timing resolution or an alternate timing resolution in their plans submitted in accordance with Sections 52.80(d) and 50.34(i) of the Commission’s regulations. For Item B.2.m.2, freshly discharged fuel6 is not placed over SFP rack feet. This restriction should be addressed in procedures. If an analysis concludes that flow is not restricted by rack feet, then this item is not applicable. The analysis should be available for NRC inspection. For Item B.2.m.3, a contiguous area should be established in the SFP and procedures should ensure that sufficient space is available to support the downcomer effect for natural circulation cooling. This space may be limited by SFP loading issues (such as space, criticality, technical specification issues, and boraflex degradation). The downcomer area should be maximized based on limiting conditions in the pool. SFP mitigation measures 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