Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

Investigation of the dependence testimony sector control system leak fuel cladding BN-600 reactor on the operational parameters

9/01/2015 2015 - #02 Global safety, reliability and diagnostics of nuclear power installations

Albutova O.I. Lukyanov D.A.

DOI: https://doi.org/10.26583/npe.2015.2.03

UDC: 621.039

The problem of determining the background of indications of measuring channels of the sector control tightness claddings (SSKGO) (evidence in the absence of the defect), which significantly depend on the location of the control points and the operational parameters of the reactor is relevant for fast reactors. The ability to predict the estimated background opens up prospects for further development of the sector CLC, improve its technical and metrological characteristics.

The dependence of readings SSKGO BN-600 on the operational parameters and the development of a regression model predicting SSKGO background readings. Process performance. 1) Formation of the list of parameters of the regression model for determining background level measuring channel SSKGO. Along with the power of the reactor, the temperature in the detection unit (DB) and the time to start mikrokampanii in the model included the estimated value of the temperature outside of the database, which is proportional to the temperature increment in the database. 2) Determination of the coefficients of the regression model was performed by least squares (OLS) using stepwise regression with the sequential addition of para-meters. The criterion for inclusion of a parameter in the model was to reduce the value of the average approximation error e and normalization of residual distribution model. Data processing was carried out using MS Excel, MS Access, VBA.

Modeling results show that all parameters are statistically significant. In the prediction error of the model developed SSKGO background readings in all areas given one-governmental mikrokampanii reactor BN-600 is less than 1%, which meets the original requirements.

The research background depending on the operational parameters of the reactor have scientific novelty – earlier similar studies have not been published, and practical significance. Upon completion of testing the model developed at enhancing the operational data, will decide on the implementation of the technique as part of SSKGO rectors of the BN-600 and BN-800.

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BN-600 sectoral monitoring system leak fuel cladding background readings delayedneutrons capacity temperature detection unit regression model an average approximation error bar chart