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http://www.nrc.gov/reading-rm/doc-collections/fact-sheets/3mile-isle.html

The accident began about 4 a.m. on Wednesday, March 28, 1979

Date Event

July 1980 Approximately 43,000 curies of krypton were vented from the reactor building.

July 1980 The first manned entry into the reactor building took place.

Nov. 1980 An Advisory Panel for the Decontamination of TMI-2, composed of citizens, scientists, and State and local officials, held its first meeting in Harrisburg, PA.

July 1984 The reactor vessel head (top) was removed.

Oct. 1985 Fuel removal began.

July 1986 The off-site shipment of reactor core debris began.

Aug. 1988 GPU submitted a request for a proposal to amend the TMI-2 license to a "possession-only" license and to allow the facility to enter long-term monitoring storage.

Jan. 1990 Fuel removal was completed.

July 1990 GPU submitted its funding plan for placing $229 million in escrow for radiological decommissioning of the plant.

Jan. 1991 The evaporation of accident-generated water began.

April 1991 NRC published a notice of opportunity for a hearing on GPU's request for a license amendment.

Feb. 1992 NRC issued a safety evaluation report and granted the license amendment.

Aug. 1993 The processing of accident-generated water was completed involving 2.23 million gallons.

Sept. 1993 NRC issued a possession-only license.

Sept. 1993 The Advisory Panel for Decontamination of TMI-2 held its last meeting.

Dec. 1993 Monitored storage began.