pilgrim


The “Race” to Resolve the Boiling Water Reactor Safety Limit Problem

, director, Nuclear Safety Project

General Electric (GE) informed the Nuclear Regulatory Commission (NRC) in March 2005 that its computer analyses of a depressurization event for boiling water reactors (BWRs) non-conservatively assumed the transient would be terminated by the automatic trips of the main turbine and reactor on high water level in the reactor vessel. GE’s updated computer studies revealed that one of four BWR safety limits could be violated before another automatic response terminated the event.

Over the ensuring decade-plus, owners of 28 of the 34 BWRs operating in the US applied for and received the NRC’s permission to fix the problem. But it’s not clear why the NRC allowed this known safety problem, which could allow nuclear fuel to become damaged, to linger for so long or why the other six BWRs have yet to resolve the problem. UCS has asked the NRC’s Inspector General to look into why and how the NRC tolerated this safety problem affecting so many reactors for so long. 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 Safety Performance at Pilgrim

, director, Nuclear Safety Project

The Nuclear Regulatory Commission (NRC) held a public meeting on Tuesday, January 31, 2017, in Plymouth, Massachusetts. A large crowd of over 300 individuals (perhaps thousands more by White House math) attended, including me. Elected officials in Massachusetts—the attorney general, the governor, the entire US Congressional delegation, and state senators and representatives—had requested the meeting. Many of these officials, or their representatives, attended the meeting.

The elected officials asked the NRC to conduct a public meeting to discuss the contents of an email from the leader of an NRC inspection team at Pilgrim to others within the agency regarding the results from the first week’s efforts. An NRC staffer forwarded this email to others within the agency, and inadvertently to Diane Turco of the Cape Downwinders, a local organization. The contents of the leaked email generated considerable attention.

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Special Inspections: Safety Relief Valve Problems at Perry and Hatch

, director, Nuclear Safety Project

Near-Miss Summary

The Near-Miss

The Nuclear Regulatory Commission (NRC) sent special inspection teams to the Perry Nuclear Power Plant in Perry, Ohio and to the Edwin I. Hatch Nuclear Plant near Baxley, Georgia early this year. Both plants feature boiling water reactors (BWRs) and both experienced problems with safety relief valves that prompted the NRC’s reactions. Read more >

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Nuclear Safety inFLEXibility

, director, Nuclear Safety Project

Disaster by Design/Safety by Intent #23

Disaster by Design

Among the actions taken by the Nuclear Regulatory Commission (NRC) in response to the March 11, 2011, accident at Fukushima was to issue an order on March 12, 2012, to all U.S. nuclear plant owners requiring them to procure equipment and implement measures to enable their facilities to cope with an extended loss of normal and backup power supplies to emergency equipment. Read more >

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