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1272853 
Technical Report 
Neutron method for NDA analysis in the SAPPHIRE Project 
Lewis, KD 
1995 
toxnet:NTIS/02984898_3 
GRA and I 
GRA and I 
The implementation of Project SAPPHIRE, the top secret mission to the Republic of Kazakhstan to recover weapons grade nuclear materials, consisted of four major elements: (1) the re-packing of fissile material from Kazakh containers into suitable US containers; (2) nondestructive analyses (NDA) to quantify the U-235 content of each container for Nuclear Criticality Safety and compliance purposes; (3) the packaging of the fissile material containers into 6M/2R drums, which are internationally approved for shipping fissile material; and (4) the shipping or transport of the recovered fissile material to the United States. This paper discusses the development and application of a passive neutron counting technique used in the NDA phase of SAPPHIRE operations to analyze uranium/beryllium (U/Be) alloys and compounds for U-235 content. 
Fissile Materials; *Nuclear Weapons; *Uranium 235; Beryllium Alloys; Kazakhstan; Neutron Detection; Nondestructive Analysis; Nuclear Reaction Analysis; Uranium Alloys; EDB/400101; EDB/450200; EDB/350300 
• Uranium
     Toxline
     Merged reference set
     Secondary Refinement
          Retained for manual screening
     Excluded:
          Not chemical specific
     Uranium Literature Search Update 3/2017
          Toxnet