Simple Schematic of the Three Mile Island Unit 2 Nuclear Power Plant.
United States Nuclear Regulatory Commission
Source: U.S. Nuclear Regulatory Commission Fact Sheet on the Accident at Three Mile Island. <a rel="nofollow" class="external free" href="https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/3mile-isle.html#tmiview">http://www.nrc.gov/reading-rm/doc-collections/fact-sheets/3mile-isle.html#tmiview</a>