Reactor Containment Vessel Construction Merging
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Solution Overview
Problem
The construction period for nuclear power generation facilities is prolonged due to the complex and increased steps in building the equipment room under the pressure suppression pool in the Economic Simplified Boiling Water Reactor (ESBWR) compared to the Advanced Boiling Water Reactor (ABWR), leading to decreased construction efficiency and longer project timelines.
Innovation Solution
The implementation of a reactor containment vessel with an outer and inner cylindrical wall made of steel plate reinforced concrete, extending from the top slab to the base mat, and a pressure suppression pool floor partitioned with steel plate concrete, allowing for simultaneous construction of the cylindrical wall and pressure suppression pool floor, reducing the need for form panels and reinforcement construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the equipment room is disposed under the pressure suppression pool in the ESBWR, then the reactor containment vessel can be configured with natural circulation boiling water reactor characteristics, but the construction steps become more complex and the construction period is increased by approximately three months
Solution Approach 1:
The invention merges the construction of the cylindrical wall and pressure suppression pool floor into a single integrated construction step. By using form panels that can be reused for both structures, the patent eliminates the need for separate construction sequences, thereby reducing the construction period while maintaining the equipment room configuration under the pressure suppression pool.
Solution Approach 2:
The invention employs preliminary action by pre-positioning form panels and reinforcement structures before the actual concrete pouring. The form panels are designed to serve multiple purposes in the construction sequence, and reinforcement bars are pre-installed in positions that facilitate both the cylindrical wall and pressure suppression pool floor construction, thereby reducing overall construction time.
2Manufacturing precision
If the cylindrical wall and pressure suppression pool floor are constructed separately, then each structure can be built with optimal form panels and reinforcement, but the construction process becomes more complex and time-consuming
Solution Approach 1:
The invention combines the construction processes of the cylindrical wall and pressure suppression pool floor into a single integrated operation. The same form panels are used for both structures, and reinforcement bars are installed in a unified sequence, thereby simplifying the construction process while maintaining manufacturing precision through standardized construction procedures.
Solution Approach 2:
The invention applies universality by designing form panels that serve multiple functions: they form the cylindrical wall structure, support the pressure suppression pool floor, and can be reused in subsequent construction phases. This multi-functional approach reduces construction process complexity while ensuring consistent construction quality through standardized form panel designs.
3Adaptability or versatility
If additional construction steps are added for the equipment room under the pressure suppression pool, then the reactor containment vessel can accommodate all necessary equipment and structural requirements, but the construction efficiency decreases
Solution Approach 1:
The invention merges the equipment room construction with the cylindrical wall and pressure suppression pool floor construction. The form panels and reinforcement structures are installed in a single construction sequence, and the equipment room space is created as an integral part of the overall structure, thereby maintaining equipment accommodation capability while improving construction efficiency by eliminating redundant construction steps.
Data Source
AI summary
A reactor containment vessel of the present invention has a primary reactor containment vessel disposing a dry well for storing a reactor pressure vessel, a wet well for storing a pressure suppression pool, and an equipment room disposing below said pressure suppression pool inside thereof. Further, the primary reactor containment vessel includes an outer cylindrical wall reaching to a base mat from a top slab of the primary reactor containment vessel and facing the drywell, the pressure suppression pool and the equipment room respectively, an inner cylindrical wall facing the pressure suppression pool and the equipment room respectively, and a pressure suppression pool floor partitioning among the pressure suppression pool and the equipment room, and an outside portion of the outer cylindrical wall, an inside portion of the inner cylindrical wall, an outside portion of the ceiling and a lower portion of the pressure suppression pool floor are formed of a steel plate reinforced concrete respectively.The reactor containment vessel can contribute to shorten construction period and thereby improve economic efficiency of nuclear power generation facilities.