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ABSTR.P r e v i o u s A E C -sponsored development w o r k on v a r i o u s concepts of under-sodium scanning d e v i c e s h a s r e s u l t e d i n the s e l e c t i o n of a single a pp r o a c h , d e s c r i b e d h e r e i n , that r e p r e s e n t s the b e s t c o m p r o m i s e of s i m p l i c i t y , flexibility, r a n g e , and resolution. In the context of the capabilities and l i m i t a t i o n s of this a p p r o a c h , which employs a n a r r o w -b e a m u l t r a s o n i c t r a n sd u c e r with a m e t a l l i c focusing l e n s o p e r a b l e i n sodium a t 600 F, n u m e r o u s applications i n existing and future sodium-cooled r e a c t o r s and a s s o c i a t e d r e s e a r c h and development p r o j e c t s a r e possible. A s u r v e y of t h e s e applications has been m a d e , evaluated, and reduced t o a s i n g l e demonstration objective which r e p r e s e n t s a c o m m o n denominator of m o s t of the applications of g r e a t e s t potential i n t e r e s t i n the Liquid Metal F a s t B ...
