Numerical calculation based on a computer simulation of point defect k
inetics under stress was performed to predict radiation-induced deform
ation in an Inconel X-750 bolt in a LWR core and for a 316 stainless s
teel blanket in experimental fusion reactors with the water-coolant sc
enario. Although the displacement rate is rather low, modest irradiati
on creep with nearly linear stress dependence was predicted below 200
MPa at 300 degrees C in the LWR core. This low stress dependence cause
s significant stress relaxation, which coincides with the experimental
data to 2 dpa. An almost equal amount of enhanced irradiation creep s
train was predicted at 60 degrees C in both solution annealed and cold
worked 316 stainless steel in the water-cooled blanket. The stress re
laxation is practically not expected without irradiation in both the c
ases, but the calculation predicts that it is definitely expected unde
r irradiation.