Support to the identification of anomalies in an external neutron source using Hurst Exponents

摘要: Abstract A new methodology is proposed here to identify anomalies in the neutron flux as a result production trips an Accelerator Driven System - ADS type reactor. This based on calculation of Hurst exponents, where monitored reactor core treated temporal series. In several recent articles, related fractional diffusion, exponent used estimate for order derivative. Our object study considered Myrrha simulated with Serpent Monte Carlo code two kinds occurred neutrons, follows: Peak Production (PP), Unprotected* Beam Overpower (UABO), and spurious Trip (BT). it was different methods, namely Rescaled Range Analysis (R/S) Detrended Fluctuation Method (DFA). The results obtained showed that R/S had some advantages comparison DFA indicating occurrence those anomalies. Also being able provide scale assessment intensity trip occurred, showing be useful tool support anomaly identification reactors.