title: Isotopic correlation for242Pu composition prediction: Multivariate regresssion approach.
abstract: Multivariate regression calibration using multiple linear regression (MLR), principle component regression (PCR) and partial least squares regression (PLSR) algorithm was performed on238Pu,239Pu,240Pu and241Pu atom% abundances to predict242Pu isotopic abundance. The MLR algorithm was found to be the best among these three algorithms. The effect of238Pu composition on the242Pu abundance prediction was found to be small but significant especially for achieving high accuracy of <0.5%. PCR and PLSR generated nearly identical results and were inferior to the MLR results. A comparison of MLR results with those obtained by employing seven previously reported empirical methods revealed far superior prediction capability of MLR model. Among the seven empirical models, the best prediction capability was found for Bignan correlation containing238Pu isotopic data. The study clearly demonstrates that the production of238Pu and242Pu has some small correlation and the use of238Pu in isotopic correlation for242Pu prediction is important to get accurate results.
authors.affiliation: Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India. Electronic address: asarkar@ymail.com.
authors.forename: Arnab
authors.initials: A
authors.lastname: Sarkar
authors.affiliation: Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: Raju
authors.initials: R
authors.lastname: Shah
authors.affiliation: Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: K
authors.initials: K
authors.lastname: Sasibhusan
authors.affiliation: Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: S
authors.initials: S
authors.lastname: Jagadishkumar
authors.affiliation: Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: Sumana
authors.initials: S
authors.lastname: Paul
authors.affiliation: Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: A R
authors.initials: AR
authors.lastname: Parab
authors.affiliation: Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: D
authors.initials: D
authors.lastname: Alamelu
authors.affiliation: Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India. Electronic address: skaggr2002@gmail.com.
authors.forename: S K
authors.initials: SK
authors.lastname: Aggarwal
keywords: Isotopic correlation; MLR; Multivariate regression; PCR; PLSR