TMI @ 35 Conference

The Three Mile Island Nuclear Crisis in Perspective

Three Mile Island


Join us at our two-day conference as we re-examine the lessons learned from the historic Three Mile Island nuclear crisis and answer important questions about how TMI set a precedent for nuclear security and safety, how it informed research, and how the event provided a catalyst for social change. We’ll also examine the management of complex catastrophic events today. What does such management look like in the era of Homeland Security?

Featuring experts from Penn State Faculty, external experts and stakeholders, historic personalities, and eyewitnesses.

This event is organized by the School of Public Affairs, Chair of Homeland Security, in collaboration with other schools and units of Penn State Harrisburg and Penn State. It is free — including lunch, coffee breaks and a reception — and open to the public!


Download the full conference program flyer

Highlights include:

  • Opening address by Dick Thornburgh – Former Governor of Pennsylvania
  • Keynote speeches from:
    • Harold Denton - President Jimmy Carter’s personal adviser for the TMI accident
    • Arnie Gundersen - Fairewinds Energy Education, expert witness in the investigation of the TMI accident
    • James Loy - Former Deputy Secretary of Homeland Security
    • Robert Walker - Former Pennsylvania Congressman
    • Mark S. Singel - Former Lt. Governor of Pennsylvania
  • Oral history panel – The TMI accident from the point of view of involved/affected communities
  • Roundtable: TMI 1979 in perspective – Changes in nuclear security and safety
  • Panel: TMI and the comprehensive approach to crisis management – cross-disciplinary perspectives from Penn State research
  • Presentation: TMI and anti-nuclear activism
  • Student panel: Policy of nuclear energy
  • Concluding roundtable: Challenges ahead – What we did (not) learn from TMI for the era of Homeland Security
  • Reception hosted by the Program Office of inter-college Master program of Homeland Security, Penn State Harrisburg
  • Accompanying exhibition: "Nuclear Expressions,” displaying objects representative of cultures of coping with the TMI 1979 accident.

Conference Dates and Times:

  • Thursday, March 27, 3 - 8pm
  • Friday, March 28, 9am - 8pm


The event is free and open to the public; however, advance registration is required via


For further information, please contact: 

Dr. Alexander Siedschlag
Professor and Chair of Homeland Security
Penn State Harrisburg
(717) 948-4326


This event has ended; page retained for archival purposes only.


Morrison Gallery, Library