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Journal Articles

FCC metal-like deformation behaviour of Ir$$_3$$Nb with the L1$$_2$$ structure

Okamoto, Norihiko*; Takemoto, Shohei*; Chen, Z. M. T.*; Yamaguchi, Masatake; Inui, Haruyuki*

International Journal of Plasticity, 97, p.145 - 158, 2017/10

 Times Cited Count:10 Percentile:50.15(Engineering, Mechanical)

JAEA Reports

Postirradiation examination of JOYO MK-I core fuel PPJX13; Destructive examination of fuel elements

Yamanouchi, Sadamu; Kuwajima, Y.; Namekawa, Takashi; Inui, T.; Kondo, M.; Tani, Y.; Usui, Keiji; Nagai, Shuichiro

PNC TN9410 85-138, 109 Pages, 1985/03

PNC-TN9410-85-138.pdf:7.0MB

The JOYO MK-I core fuel subassembly PPJX13 was irradiated in JOYO MK-I core (location; 000) from 50 MW test through 75 MW 6th cycle. The average burnup was about 40,100 MWD/MTM. Five fuel pins was selected in the subassembly. Destructive examination items were metallographic examination (fuel and cladding), micro-hardness measurement, cladding density measurement and burnup measurement. The following results were obtained; (1) Central void of about 250Mm$$phi$$, columner grain region, equiaxed region (gas bubble region) and densified equiaxed region was formed by fuel restrusting. (2) Fuel and Cladding residual gap width were 20 $$mu$$m $$sim$$ 89 $$mu$$m. Fuel-cladding chemical interaction was 13 $$mu$$m at the maximum cladding temperature. (3) Carbide precipitation along the grain boundary and twinning zone were observed at high temperature position in cladding. Cladding micro-hardness indicated high value at low temperature position. (4) The cladding density change of 1.10% were observed in R material. (5) Burnup measurement by $$^{148}$$Nd isotope analysis using mass spectrometer showed 5.22 atom % at the center position of the center fuel pin.

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