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DISCLAIMERPortions of this document may be illegible in electronic image products. Images are produced from the best available original document. NOTICEThis r e p o r t was prepared a s a n account of work sponsored by the United States Government. Neither the United States nor the United States Atomic Energy Commission, nor any of their employees, nor any of their contractors, subcontract o r s , o r their employees, makes any warranty, express o r implied, o r assumes any legal liability o r responsibility for the accuracy, completeness o r usefulness of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately-owned rights. A c e n t r i f u g a l c o n t a c t o r of novel d e s i g n h a s been developed f o r t h e s o l v e n t e x t r a c t i o n p r o c e s s i n g of n u c l e a r f u e l s . The n o v e l a s p e c t i s t h a t t h e aqueous and o r g a n i c s o l u t i o n s are f e d d i r e c t l y i n t o t h e annulus between t h e hollow 4-in.-dia r o t o r and t h e c a s i n g and are mixed by s k i n f r i c t i o n as t h e y flow downward. This d e s i g n e l i m i n a t e s t h e mixing chamber, mixing p a d d l e , and i n j e c t i o n n o z z l e employed i n t h e c e n t r i f u g a l c o n t a c t o r d e s i g n developed a t t h e A E C ' s Savannah River (SR) P l a n t . High throughp u t i s achieved by t h e h i g h length-to-diameter (L/D) r a t i o combined w i t h high o p e r a t i n g speed ( t o 3500 rpm).S e p a r a t i n g c a p a c i t i e s w i t h s y n t h e t i c Purex-type s o l u t i o n s [ i . e . , 0.5M n i t r i c a c i d and 30% t r i b u t y l phosphate (TBP) i n n -d o d e c a n e d i l u e n t ] ranged from about 5 gpm a t 2000 rpm t o about 15 gpm a t 3500 rpm. E s s e n t i a l l y 100% s t a g e e f f i c i e n c y w a s demonstrated i n e x t r a c t i o n and s t r i p p i n g tests w i t h uranium as t h e s o l u t e . Mechanical performance w a s very good througho u t t h e tests.

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