tmi


Three Mile Island Intruder

, director, Nuclear Safety Project

Regulation and Nuclear Plant Safety #2

A man recently released from a hospital where he had been treated for mental health issues drove his mother’s station wagon into—literally—the Three Mile Island nuclear plant near Harrisburg, Pennsylvania at 6:53 am on February 7, 1993. Workers responded to the unauthorized entry by locking the doors to the control room and declaring a Site Area Emergency—the second most serious emergency of the Nuclear Regulatory Commission’s (NRC’s) four classifications. The intruder was found more than four hours later hiding in the turbine building. Read more >

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Role of Regulation in Nuclear Plant Safety: A New Series of Posts

, director, Nuclear Safety Project

President Trump seeks to lessen the economic burden from excessive regulation. The Nuclear Regulatory Commission (NRC) initiated Project AIM before the 2016 elections seeking to right-size the agency and position it to become more adaptive to shifting needs in the future. And the nuclear industry launched its Delivering the Nuclear Promise campaign seeking productivity and efficiency gains to enable nuclear power to compete better against natural gas and other sources of electricity.

In light of these concurrent efforts, we will be reviewing momentous events in nuclear history and posting a series of commentaries on the role of regulation in nuclear plant safety. The objective is to better understand under-regulation and over-regulation to better define “Goldilocks” regulation—regulation that is neither too lax nor too onerous, but just right. That better understanding will enable us to engage the NRC more effectively as the agency pursues Project AIM and the industry tries to deliver on its promise. Read more >

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TVA’s Nuclear Allegators

, director, Nuclear Safety Project

The Nuclear Regulatory Commission (NRC) receives reports about potential safety problems from plant workers, the public, members of the news media, and elected officials. The NRC calls these potential safety problems allegations, making the sources allegators. In the five years between 2012 and 2016, the NRC received 450 to 600 allegations each year. The majority of the allegations involve the nuclear power reactors licensed by the NRC. Read more >

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Nuclear Plant Accidents: Three Mile Island

, director, Nuclear Safety Project

Disaster by Design/Safety by Intent #42

Disaster by Design

At 4:00 am on March 28, 1979, workers at the Three Mile Island (TMI) nuclear plant near Harrisburg, Pennsylvania were preparing to restart the Unit 1 reactor from a refueling outage. The Unit 2 reactor was marking its first anniversary—exactly one year earlier, a nuclear chain reaction had been achieved for the first time. A series of events over the next 135 minutes would end Unit 2’s life and delay Unit 1’s restart for several years. Read more >

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