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Additional info for Gaseous Diffusion Fuel Reprocessing Pgm

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F i r s t t o be considered i s t h e f a c t t h a t t h e compressor i s a close-tolerance machine, and as f o r aay o t h e r p r e c i s i o n equipment, a c e r t a i n amount of c a r e must be e x e r c i s e d i n t h e c o n s t r u c t i o n and o p e r a t i o n of the u n i t . Precision machining and balancing are mandato;-y, and s p e c i a l care must be employe2 i n t h e assembly of t h e compressor t o ensure t h a t proper movement and t o l e r a n c e s a r e respected. Consideration must be given to t h e p o s s i b l i t y t h a t t h e impeller can c o n t a c t t h e i n t e r s t a g e s e a l during r e p i d s t a r t u p due t o uneven heating.

1 l e n g t h of about 10 f e e t 3 inches and a l s o has a two-diatyter design. 12 inches i n diameter and i s about 4 feet 3 The lower section i s inches high. p a r t of t h e f i l t e r cooler i s 16 inches i n 6-iameter. The upper To l i m i t bed height i n t h e lower section, t h e vessel i s equipped with an overflow l i n e which extends from t h e top of t h e 12-inch section t o a receiving vessel. The lower p a r t of t h e f i l t e r cooler i s water cooled, while t h e upper zone i s a i r cooled.

Immediately. Excessive f i l t e r plugging devdoped almost Although laboratory analyses of f i l t e r coatings by means of w e t chemistry, spectrochemical, and X-ray difPraction were unable t o i n d i c a t e t h a t exact s t r u c t u r e of t h e plugging media, it was thought t o be e i t h e r an i n t e r m e t a l l i c complex o r an oxyhalogen compoluiii. A l l sources of oxygen were f i r s t eltminated during t h e hydrochlorination phase t o no avail. The plugging was found t o 'oe somewhat reducible with hydrogen a t 500" C , but excess hydrogen during hydrochlorination d i d not i n h i b i t t h e reaction.

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