Abstract: STUDIES ON INTERFACIAL CRUD FORMATION BY Zr AND H_2MBPZhang Chonghai; Lin Cansheng;Wang Xiaoying;Yang Enbo(China Institute of Atomic Energy，P. O. Box 275 (48)，Beijing 102413)Abstract:The behavior of H2MBP and Zr in forming interfacial crud is studied.The experiments show that interfacial crud can be formed by H2MBP and Zr in the system of 30%TBP-n-dodecane HNO3. The forming behavior depends on the concentrations of H2MBP,Zr and HNO3.The fil trated residue of the interfacial crud is analyzed using the techniques of IR spectra and X-ray fluo rescence and it shows that the residue is mainly composed of Zr(MBP)2.Keywords: Zirconium H_2MBP Interfacial crud