March 7, 2017

A Manual of reactor laboratory experiments by D. A. Daavettila, Argonne National Laboratory, U.S. Atomic

By D. A. Daavettila, Argonne National Laboratory, U.S. Atomic Energy Commission

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The m a i n d e s i g n o b j e c t i v e s w e r e to m a k e the r e a c t o r as s a f e and f o o l p r o o f as p o s s i b l e , to u s e a m i n i m u m c r i t i c a l m a s s , and to p r o v i d e a high a n a l y t i c a l s e n s i t i v i t y . T h e A G N - 2 0 1 is a 1 0 0 - m W , h o m o g e n e o u s , t h e r m a l r e a c t o r . T h e c o r e i s m a d e up of a s e r i e s of c i r c u l a r p o l y e t h y l e n e d i s c s , 25 c m in d i a m e t e r . It c o n t a i n s 20% e n r i c h e d U 0 2 and has a c r i t i c a l m a s s of a p p r o x i m a t e l y 650 g U 2 3 5 .

Reactor Characteristics a. General Type Homogeneous thermal reactor Principal Uses Education and Training M a x i m u m Operating P o w e r 100 mW Core UO z (20% e n r i c h e d in U 235 ) p a r t i c l e s h o m o g e n e o u s l y distributed in s o l i d polyethylene plastic m o d e r a t o r , c y l i n d r i c a l in shape Reflector Graphite Shield Lead and water Control T w o safety and two c o n t r o l r o d s , fuel l o a d e d b. 5% P a r t i c l e s i z e - 15 ± 10 ju Polyethylene powder P a r t i c l e s i z e - 100 \u Purity - c o m m e r c i a l A p p r o x i m a t e C o r e Fuel D i s c Sizes and U Content 9 in number ( 2 5 .

C . E x p e r i m e n t a l f a c i l i t i e s and top shield interlocks. d. Manual III. Startup: Manual; automatic o p e r a t i o n at p o w e r available. P r i m a r y Coolant Fluid: Circulation: a. D i r e c t i o n of f l o w : b. F l o w induced by forced circulation. 17 H e a t - d i s s i p a t i o n Method: W a t e r - t o - w a t e r heat e x c h a n g e r A v e r a g e C o r e Heat Flux: 360 B t u / f t 2 / h r at 10 kW Ratio of M a x i m u m to A v e r a g e Heat Flux: 3 Means of P u r i f i c a t i o n : M e c h a n i c a l f i l t e r and i o n - e x c h a n g e column.

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