Why did Chernobyl melt down?

Related questions

1. Did Fukushima explode?
2. Do people live in Chernobyl now?
3. What actually happened in Chernobyl?
4. Is the elephant's foot still burning?
5. Is radiation contagious person to person?
6. Why was Chernobyl worse than Hiroshima?
7. Is nuclear waste dangerous?
8. Was Hiroshima rebuilt?
9. How far away from Chernobyl is safe?
10. How long will Chernobyl be contaminated?

Tags

1. #reactor
2. #resulting
3. #design
4. #atmosphere
5. #steam
6. #released
7. #chernobyl
8. #downwind
9. #operated
10. #radioactive
11. #explosion
12. #trained
13. #accident
14. #result
15. #personnel
16. #fires
17. #least
18. #inadequately
19. #flawed