Document: NUREG-0800
Document ID: 931b933f-eeb8-4e82-b76a-4813dde9214a
Document Type: srp
Title: SPENT FUEL POOL COOLING AND CLEANUP SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190013.pdf
Revision Date: 2023-06
Chapter: 9
Section ID: 9.1.3
CFR Part: 
CFR Title: 

Content:
each system exceeds the larger of the pool leakage rate assuming spent fuel pool liner perforation resulting from a dropped fuel assembly or the evaporation rate necessary to remove 0.3 percent of the reactor rated thermal power. The design permits initiation of makeup water flow through either system from locations remote from the operating floor surrounding the pool surface. Engineering judgment and comparison with plants of similar design are used to determine that the time necessary to align systems and connect makeup systems not permanently installed is consistent with heatup times or expected leakage from structural damage. G. Design provisions have been made that permit appropriate inservice inspection and functional testing of system components important to safety. A statement that essential portions of the spent fuel pool cooling and makeup systems are included in the inservice inspection program per SRP Section 6.6 and the inservice testing program of SRP Section 3.9.6 is acceptable. H. The system design provides adequate SFP cooling capacity for routine operations, including refueling. The staff reviews either a bounding evaluation of potential refueling conditions or a method of performing outage-specific evaluations described in the SAR. The largest heat load placed on the SFPCCS heat exchangers is imposed by refueling offloads, which are deliberate, planned evolutions. As a result, if necessary for adequate cooling of the fuel, factors that increase heat load (e.g., power increases, decay time reductions, or storage capacity increases) may be offset by operational factors that reduce heat load (e.g., longer decay times or transfer of fewer fuel assemblies to the SFP) or that increase heat removal capability (e.g., scheduling offloads for periods of reduced ultimate heat sink temperature or optimizing cooling system performance). Considering the preceding measures to manage the heat load relative to cooling capability, the staff evaluates the following