Distributed Nuclear Plant Layout for Independent Safety Triggering
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Solution Overview
Problem
Traditional nuclear reactor buildings integrate auxiliary nuclear support systems closely with the reactor, making them vulnerable to damage during external events, which compromises the safety functions they provide.
Innovation Solution
A distributed modular layout separates the nuclear structure from support structures, with the latter being non-protected to withstand damage independently, triggering frontline support equipment to perform safety functions before being compromised.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If auxiliary support systems are located in near proximity to the nuclear reactor vessel within a common structure, then the systems can provide fundamental safety functions during damaging events, but the systems themselves are at risk of incurring damage from the same damaging events
Solution Approach 1:
The nuclear power plant is divided into separate structures: a protected nuclear reactor building and a non-protected support structure. This segmentation allows the support systems to be physically separated from the reactor while maintaining functional connectivity, enabling safety functions to be performed without exposing the support systems to damage from events affecting the reactor building.
Solution Approach 2:
The patent introduces spatial separation as an intermediary between the nuclear reactor and support systems. By placing support equipment in a separate non-protected structure, the system allows safety functions to be performed through this spatial intermediary, protecting support systems from direct exposure to damaging events while maintaining their ability to respond to reactor needs.
2Ease of manufacture
If a monolithic modular architecture is used with all systems in a common building, then construction is simpler, but it is more costly and time-consuming compared to distributed modular layout
Solution Approach 1:
The plant architecture is segmented into separate modular structures that can be constructed independently and then connected. This allows parallel construction of different modules, reducing overall construction time and enabling more efficient resource allocation, thereby improving productivity while maintaining manufacturing simplicity through standardized modular units.
Solution Approach 2:
The patent transitions from a single-building vertical integration to a multi-structure horizontal distribution. By spreading systems across multiple separate buildings rather than concentrating them in one monolithic structure, the design enables concurrent construction activities in different locations, improving construction productivity without significantly complicating the manufacturing process of individual modular units.
3Reliability
If support systems are placed in a protected structure meeting high SDC requirements, then they are protected from damaging events, but construction becomes more costly and complex
Solution Approach 1:
The patent applies different protection levels to different locations based on their specific needs. The nuclear reactor building is designed with high SDC requirements to protect the reactor, while support structures are designed with lower SDC requirements since they house non-critical support equipment. This localized quality approach reduces overall structural complexity and cost while maintaining adequate protection where truly needed.
Solution Approach 2:
The patent changes the SDC parameter requirements for different structures based on their functional importance. By reducing the SDC requirements for support structures from high-level protection to lower-level protection, the design simplifies structural complexity and reduces construction costs while maintaining the reliability needed for fundamental safety functions through spatial separation rather than enhanced structural protection.
Data Source
AI summary
A nuclear power plant includes a nuclear structure, a frontline support equipment, and a support structure. The nuclear structure includes, and is configured to protect from incurring damage due to a damaging event, at least one of a nuclear reactor or a nuclear fuel storage. The frontline support equipment is configured to perform a fundamental safety function. The support structure is spatially separate from the nuclear structure and includes an initiating support equipment configured to trigger the frontline support equipment to perform the fundamental safety function such that the fundamental safety function is performed independently of the initiating support equipment subsequent to the triggering. The support structure may be a non-protected structure that is not configured to protect the initiating support equipment from incurring damage due to the damaging event.