Plant Protection Response Time Evaluation Across Safety Design Stages
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Solution Overview
Problem
Current methods for ensuring the safety of nuclear power plants during design standard accidents are inadequate due to the lack of systematic response time evaluation across the entire design process of plant protection systems, leading to potential failures in instrumentation channels.
Innovation Solution
An integrated evaluation apparatus and method that classifies the design process into safety analysis, system design, response time analysis, and response time testing, measuring and comparing analytical, designed, estimated, and measured response times to ensure compliance with safety requirements through an integrated evaluation module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only a response time test is performed at the lowermost stage to verify the safety analysis response time requirement, then the safety verification is simplified, but the suitability of each design process cannot be evaluated and safety cannot be ensured
Solution Approach 1:
The patent segments the response time evaluation into four distinct modules: safety analysis module (measuring analytical response time t1), system design module (measuring designed response time t2), response time analysis module (measuring estimated response time t3), and response time test module (measuring measured response time t4). Each module evaluates a specific stage of the design process independently, allowing comprehensive safety verification without requiring a single complex monolithic system.
2Measurement precision
If an integrated evaluation is applied to each process of safety analysis, system design, response time analysis, and response time test, then the suitability of each design process can be evaluated, but the complexity of the evaluation system increases
Solution Approach 1:
The integrated evaluation module implements feedback by comparing the measured response time t4 from the test module against the estimated response time t3 from the analysis module, and further against the designed response time t2 from the design module, and finally against the analytical response time t1 from the safety analysis module. This multi-level feedback mechanism provides precise evaluation of each design process stage while maintaining manageable system complexity through structured comparison.
Data Source
AI summary
Provided is an apparatus for evaluating a response time of a plant protection system. The apparatus includes: a classification module classifying a design process related to a response time requirement of each channel performing a safety function into four operations of a safety analysis operation, a system design operation, a response time analysis operation, and a response time test operation; and an integrated evaluation module determining whether a response time evaluation is proper based on a time t1 derived in the safety analysis operation, a time t2 derived in the system design operation, a time t3 derived in the response time analysis operation, and a time t4 derived in the response time test operation.