Irradiation Creep and growth of pressure tubes in HWR Fugen

not registered; not registered

The 165MWe prototype HWR Fugen has been in commercial operation since March 1979. The material of the pressure tube is heat treated Zr-2.5 wt%Nb alloy and the pressure tubes in the Fugen have been irradiated with the maximum fast neutron flux of about 3 10 $^{17}$ n/m $^{2}$ sec. The pressure tubes have been inspected periodically according to the pressure tube monitoring program. In March 1984, inside diameter measurements on a small number of the pressure tubes were performed by using the pressure tube monitoring device adopting an ultrasonic wave method, and the diametrical irradiation creep and growth strain has been assessed. In February 1987, tube length measurements were performed and these data are to be used as the standard value for the estimation of the axial irradiation creep and growth strain. Besides, small diameter specimens pressurized by helium gas have begun being irradiated in the Fugen since April 1987.

Language	:	English
Report No.	:	PNC TN9410 87-105
Pages	:	47 Pages
Publication Year/Month	:	1987/08
Patent information	:
PDF	:	PNC-TN9410-87-105.pdf:5.29MB
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Keywords	:	no keyword
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Registration No. : GJ0919870194
JAEA Abstracts No. :

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