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Ogo‘:o’ / I a s - U-12 MO clad. s t r e s s sample with d e f e c t i n tension. No. 3056-€3-1 , b. U-12 Mo clad s t r e s s sample w i t h defect i n compression. No. 3055-B-1 Fig. 1G. Effect o f stress on U - 1 2 Mo clad defected f u e l elements. -- 60 . , ...................... .. .................. .. .. .. A ' wm-PWR-PMM-282 a. Tension side of extruded U-12 Mo stress sample. No. 3051-B-2 lOOX I b. Compression side of extruded U-12 Mo stress sample. Neg. No. 3051-B-l .

26 0 ,29 T h e s e c a l c u l a t e d values are l o w e r by a f a c t o r o f 2-3 t h a n the experimentally determined values. 7 for var5oLs uranium-molybdenum a l l o y s , '_ ' Approximate curves o f volume expansion v s exposure f o r bare uranium a l l o y s and clad a l l o y s a r e shown i n Figure 17* It i s t o be noted that apparently the r a t e of growth i s dependent upon t h e r e s t r a i n i n g f o r c e s imposed, T h i s r e s t r a i n i n g f o r c e can be increased by i n c r e a s i n g t h e cladding t h i c k n e s s ; however, the amount of deformation allowable i n the cladding p r i o r t o rupture cannot b e changed t o any great e x t e n t by i n c r e a s i n g t h e cladding thiakness.

E.. 0 . o 0 0 0 1 0 0 . 0 0 0 0 0 . . . 0 0 0 0 0 0 - Table I11 ' Metallographic Examination, Residual Phases, S i l i c o n Analysis and C o r ~ o s i o n Rates of U3Si 8O ng-IOoC for j Ingot No. 64 (T) 530 de l t a (T1 534 delta (B1 536 cored alpha (T) (B) ~524 delta . 87 -0,66 (1sample cracked up 7-11, days) IP c Dis. i n d i c a t e s d i s i n t e g r a t e d L c ..... ': I .... "e.... 0. <) 0- " 0. L7 0 . 00.. I 1 SO.... D*.... 0 b * .

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Resume of Uranium Alloy Data - X [declassified]


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