Backgrounder on the Three Mile Island Accident
http://www.nrc.gov/reading-rm/doc-collections/fact-sheets/3mile-isle.html

US NRC


This summary by the Nuclear Regulatory Agency describes how the sequence of certain events – equipment malfunctions, design-related problems and worker errors – led to a partial meltdown of the TMI‑2 reactor core but only very small off‑site releases of radioactivity.

This resource is referenced here:
Subject: Environmental Science:Energy:Nuclear Energy
Resource Type: Scientific Resources:Overview/Reference Work