United States Nuclear Regulatory Commission - Protecting People and the Environment

Three Mile Island - Unit 2

1.0 Site Identification

Type of Site: Power Reactor Facility
Location: Middletown, PA
License No.: DPR-73
Docket No.: 50-320
License Status: Possession Only License
Project Manager: Ted Smith

2.0 Site Status Summary

The Three Mile Island, Unit 2 (TMI-2) operating license was issued on February 8, 1978, and commercial operation was declared on December 30, 1978. On March 28, 1979, the unit experienced an accident which resulted in severe damage to the reactor core. (For details, see the Backgrounder on the Three Mile Island Accident.)

TMI-2 has been in a non-operating status since that time. The licensee conducted a substantial program to defuel the reactor vessel and decontaminate the facility. All spent fuel has been removed except for some debris in the reactor coolant system. The plant defueling was completed in April 1990. The removed fuel is currently in storage at Idaho National Laboratory, and the U.S. Department of Energy has taken title and possession of the fuel. TMI-2 has been defueled and decontaminated to the extent the plant is in a safe, inherently stable condition suitable for long-term management. This long-term management condition is termed post-defueling monitored storage, which was approved in 1993. There is no significant dismantlement underway. The plant shares equipment with the operating TMI - Unit 1. TMI-1 was sold to AmerGen (now Exelon) in 1999. GPU Nuclear retains the license for TMI-2 and is owned by FirstEnergy Corp. GPU contracts with Exelon for maintenance and surveillance activities. The licensee plans to actively decommission TMI-2 in parallel with the decommissioning of TMI-1.

3.0 Major Technical or Regulatory Issues

None

4.0 Estimated Date For Closure

12/31/2036

Page Last Reviewed/Updated Thursday, August 28, 2014