Fibrous Debris Production Apparatus for Nuclear Strainer Testing
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Solution Overview
Problem
The reproducibility of tests evaluating the influence of fibrous debris on the reactor core during a loss of coolant accident in nuclear power plants is compromised due to variable length distribution of fibrous debris, leading to inconsistent experimental data.
Innovation Solution
An apparatus comprising strainer bags, a sample fibrous debris deriving unit for measuring and correcting the length distribution of fibrous debris, and a fibrous debris producing unit that pulverizes aged fibers to achieve a uniform length distribution matching the sample debris, ensuring consistent test debris production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fibrous debris is collected from actual sump strainer without length control, then the debris represents real accident conditions, but the length distribution becomes variable and test reproducibility cannot be ensured
Solution Approach 1:
The invention changes the length distribution parameter of fibrous debris from variable (as collected from actual sump strainer) to uniform (through controlled production process). The debris producing unit generates fibrous debris with controlled length distribution that matches the critical range identified from actual samples, ensuring both representativeness and reproducibility.
Solution Approach 2:
The invention performs preliminary analysis of actual fibrous debris length distribution to identify the critical range before producing test debris. By pre-determining the target length distribution based on real accident debris characteristics, the test debris production can be optimized in advance to achieve consistent results across multiple tests.
2Adaptability or versatility
If fibrous debris length distribution is not controlled, then various debris can be used for testing, but conservative experimental data cannot be produced due to lack of reproducibility
Solution Approach 1:
The invention introduces precise control over the length distribution parameter of fibrous debris through the debris producing unit. This allows consistent reproduction of debris characteristics that represent critical accident conditions, enabling production of conservative experimental data while maintaining the ability to test different debris types by adjusting production parameters.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus ensures reproducible tests by producing fibrous debris with a uniform length distribution, thereby generating conservative experimental data for evaluating the impact of debris on the reactor core.
Implementation Method 1
a fibrous debris producing unit for producing fibrous debris of test having a uniform length distribution equal to the length distribution of the sample fibrous debris of the sample fibrous debris deriving unit and using the fibrous debris for the core downstream type effect test
Data Source
AI summary
The present invention is related to an apparatus and a method for producing fibrous debris of test for a nuclear plant. More particularly, producing fibrous debris of test having the uniform length distribution equal to the fibrous debris collected by a plurality of strainer bags while passing through a strainer in length distribution degree, and conducting a test for evaluating the influence of debris in the core due to a loss of coolant accident based on the produced fibrous debris for testing, thereby ensuring reproducibility of a test by the fibrous debris of test having a uniform length distribution and, thereby producing conservative experimental data.