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Keywords: covariance matrix
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7661-4
... A new scheme is proposed for calculating the covariance matrix of an a priori neutron flux spectrum using the Total Monte Carlo method. This covariance matrix can be used to improve the adjustment of calculated spectra to dosimetry measurements in a more physically realistic way. We have taken...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2012
ISBN: 978-0-8031-7536-5
... agreement with the IRDF-2002 evaluated data, whereas the uncertainties of the evaluated cross-sections are inconsistent. dosimetry reaction cross-section statistical model evaluation covariance matrix data verification orthogonalization uncertainty analysis S. A. Badikov1 Reprinted from JAI...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2012
ISBN: 978-0-8031-7536-5
... is analyzed and portrayed graphically for various valid correlation combinations on a simple criticality problem. adjustment uncertainty covariance matrix parameter-response correlation J. J. Wagschal1 Reprinted from JAI, Vol. 9, No. 4 doi:10.1520/JAI104044 Available online at www.astm.org/JAI...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2884-3
ISBN: 978-0-8031-2884-2
... the reactor pressure vessel. neutron spectrum adjustment pressure vessel surveillance least squares covariance matrix J. G. Williams1and P. J. Griffin.2 Physically Constrained Adjustment of Calculated Neutron Spectra for Dosimetry and Vessel Locations3 Reference: Williams, J. G. and Griffin, E J...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2884-3
ISBN: 978-0-8031-2884-2
... of the corresponding transformation of the spectrum covariance matrix is described. Both algorithms are realized as a computer code for IBM PC. neutron spectrum spectral function spline-interpolation covariance matrix G. A. Shimansky, l A. I. Tellin] and M. I. Gurevich2 Algorithm and Computer Code of Group...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-1899-6
ISBN: 978-0-8031-1899-7
... matrix of previously determined 3 He response functions is evaluated. The calculated filter transmission function together with a covariance matrix estimated from cross-section uncertainties of the filter material is used as fluence pre-information. The results obtained from algorithms with and without...