While I understand the common sense intuition of a radiation leak being dangerous, is there scientific evidence that it would kill / a lot of live beings? I gue

While I understand the common sense intuition of a radiation leak being dangerous, is there scientific evidence that it would kill / a lot of live beings? I guess the letal radiations would have a very narrow range around the sinked ship. I remember seeing a guy eating dust just around chernobyl central, and proving that it was under the letal dose. Can someone quantify the risk?