Nuclear Reactor Power Distribution Using Segmented Battery Systems

The patent segments the battery system into two distinct parts: a first battery system with qualified battery sources (VLA) for non-critical loads, and a second battery system with non-qualified battery sources (VRLA) for critical loads. This segmentation allows each segment to be optimized independently - the critical segment uses cost-effective VRLA batteries while the non-critical segment uses regulated VLA batteries, thereby reducing overall capital costs while maintaining necessary reliability for safety functions

The patent applies local quality by assigning different battery types to different load categories based on their specific requirements. Critical loads that require fail-safe operation receive power from the VRLA battery system, while non-critical loads receive power from the VLA battery system. This localized optimization ensures that expensive qualified batteries are only used where absolutely necessary, reducing overall system cost while maintaining safety

The patent divides the power distribution system into separate segments for critical and non-critical loads, each with its own battery system. The first battery system uses qualified VLA batteries for non-critical loads where regulatory compliance is less stringent, while the second battery system uses non-qualified VRLA batteries for critical loads where cost reduction is prioritized. This segmentation resolves the contradiction by allowing cost-effective battery types to be used in critical applications while maintaining regulatory compliance in non-critical applications

The patent employs non-qualified VRLA batteries for critical loads, which are cheaper and require less maintenance than qualified VLA batteries. While VRLA batteries may not meet all regulatory qualifications, they provide sufficient reliability for critical safety functions at reduced cost, embodying the principle of using simpler, less expensive components where they are adequate