Characterization of pneumatic fast transfer system irradiation position of KAMINI reactor for <i>k</i>₀-based NAA

作     者：Rao, J. S. Brahmaji Senthilvadivu, E. Seshadreesan, N. P. Acharya, R. Venkatasubramani, C. R. Reddy, A. V. R. 

作者机构：Indira Gandhi Ctr Atom Res Chem Grp Div Fuel Chem Kalpakkam 603102 Tamil Nadu India Bhabha Atom Res Ctr Div Radiochem Bombay 400085 Maharashtra India Indira Gandhi Ctr Atom Res Div Analyt Chem Div Fuel Chem Kalpakkam 603102 Tamil Nadu India 

出 版 物：《JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY》 

年 卷 期：2012年第294卷第1期

页      面：137-141页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0827[工学-核科学与技术] 0703[理学-化学] 

主　　题：NAA k(0)-method KAMINI research reactor Pneumatic fast transfer system position Characterization f alpha Reference materials Validation 

摘      要：The pneumatic fast transfer system position at KAMINI reactor, Indira Gandhi Centre for Atomic Research, India was characterized by determining the epithermal neutron flux shape factor (alpha) and the sub-cadmium to epithermal neutron flux ratio (f) for k (0)-based Neutron Activation Analysis (k (0)-NAA). For determination of alpha value, bare, Cd-ratio and Cd-cover methods were employed using dual and multi monitors namely Au, Zr and Zn. For calculation of f, Au and Zr monitors were used in the case of bare method and Au monitor was used for cadmium ratio and cadmium cover methods. The determined alpha-value of PFTS indicated a hard epithermal neutron spectrum and the f value indicated about 96 % thermal neutron component. For validation of k (0)-NAA method, reference materials namely NIST SRM 1646a (Estuarine Sediment) and BCS Nb-stabilized Stainless Steel (BCS/SS No.261/1) were analyzed. The percentage errors of the determined concentration values of elements were within +/- 5 % with respect to the certified values and the Z-score values at 95 % confidence level were within +/- 2 in most of the cases.