Plant Maintenance Planning with Risk and Component Lead Time
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Solution Overview
Problem
Current maintenance assisting devices for nuclear power plants face challenges in efficiently performing maintenance when components cannot be procured at determined inspection timings, and they fail to consider risks adequately, making it difficult to optimize maintenance plans.
Innovation Solution
A plant maintenance assisting system that includes an abnormality indication monitoring system, abnormality diagnosis system, risk evaluation system, maintenance plan creation system, and component management system to determine the need for maintenance, set optimal maintenance timing, and ensure component procurement, using risk and diagnosis information to prioritize and manage maintenance effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inspection timing is determined based on diagnosis results, then maintenance efficiency is improved, but component procurement cannot be guaranteed at determined timing
Solution Approach 1:
The system performs preliminary actions by determining maintenance timing based on diagnosis results and component lead time requirements before actual maintenance execution. The maintenance management server calculates required maintenance timing in advance considering component procurement lead times, ensuring components can be procured when maintenance is scheduled. This preliminary planning resolves the contradiction by proactively addressing component availability issues before they manifest as problems.
2Productivity
If maintenance plan is optimized based on abnormality indication, then maintenance effectiveness is improved, but risk assessment is insufficient
Solution Approach 1:
The system merges abnormality indication information from the abnormality indication determination device with risk assessment information from the risk information acquisition device. The maintenance management server integrates both types of information to comprehensively determine maintenance timing and priority. This combination resolves the contradiction by ensuring maintenance optimization considers both operational abnormality signals and safety risk factors together rather than separately.
3Reliability
If component lead time is considered in maintenance timing, then component availability is improved, but maintenance plan flexibility is reduced
Solution Approach 1:
The system implements dynamic maintenance planning where the maintenance management server continuously adjusts maintenance timing based on real-time component lead time information and current plant conditions. The required maintenance timing is not fixed but dynamically recalculated considering component procurement lead times, abnormality indications, and risk levels. This dynamic approach resolves the contradiction by making the maintenance plan adaptable while ensuring component availability through lead time consideration.
Data Source
AI summary
A plant maintenance assisting system is provided with: an abnormality indication monitoring system; an abnormality diagnosis system; a maintenance plan creation system; a risk evaluation system; and a component management system. On the basis of risk information and abnormality diagnosis information that is a result of diagnosis by the abnormality diagnosis system, the risk evaluation system determines the need for maintenance work with respect to an abnormality indicating facility. In a case where it is determined that maintenance work with respect to the abnormality indicating facility is necessary, the maintenance plan creation system sets, in a maintenance plan, maintenance implementation timing of maintenance work with respect to a facility including the abnormality indicating facility. On the basis of component management information, the component management system determines whether a component can be procured at the maintenance implementation timing set by the maintenance plan creation system.