THE NUCLEAR REACTOR PRESSURE VESSEL AND THERMAL SHIELD ACTIVITY

摘要

The results of the analysis of the pressure vessel and thermal shield (n,γ) activity of the PWR (WWER) reactor are presented. It was shown that the saturation activity is reached after six months of the irradiation. Two years after the shut-down of the nuclear reactor the activity drops to the level compared to the natural reactivity of the earth.