Concept Dictionary archive — page 12
Waste management principles — IAEA nine principles and three treatment principles
Protect people and the environment now and in future without undue burdens on future generations; after 60 days of holding only 0.036 % of Xe-133 remains, but 98.9 % of Kr-85.
Xenon dead time — when the post-shutdown xenon peak blocks restart
After shutdown xenon peaks at about 10 h; in a textbook case at 5×10¹³ n/cm²·s an available margin of 4,000 pcm leaves restart blocked from 1.8 h to 24.0 h, and the window grows with pre-shutdown flux.
Xenon-135 Poisoning — equilibrium xenon, post-shutdown peak and power steps
About 96 % of xenon-135 comes from iodine-135 decay; equilibrium xenon saturates near −2.7 % at high flux, and after shutdown xenon peaks at about 10 hours before decaying over several days.