NEI Nuclear Notes

Earlier this year, we discussed the idea of a United States without nuclear energy . It’s a scary thought. But also small potatoes: let’s talk big, let’s talk about a world without any energy. Occasionally, folks who take the Whole Earth Catalog a bit too seriously posit  an energy-free world, but that’s because they do their energyless thing with energy all around them. For most people, the prospect is terrifying, an invitation to anarchy, shortened lives – horror. Sapping the world’s energy has been used many times in movies and TV programs. The show Revolution (2012-2014) used it as its inciting event and the series then tried to unravel the mystery of what happened to the electricity – think Lost with megawatts. The Day the Earth Stood Still (1951/2008)(both Rennie and Reeves editions) shows the humanoid alien peacenik easily able to shut down all energy sources. And lest we forget, nuclear energy has a small role too in this context. The most recent Godzilla (2014) sh...

Here are two views on the closing of Massachusetts’ Pilgrim Generating Station: News that it will close by 2019 has state officials scrambling to fill an expected gap in energy production while meeting ambitious goals to lower greenhouse gas emissions by 25 percent by 2020. Meanwhile, environmental groups are prodding federal regulators to shutter the plant even before 2019. Groups such as Environment Massachusetts view the plant’s pending closure as an opportunity to expand the use of solar and wind power in the state. They rallied at the Statehouse last week, urging state officials to act. What first struck me about this is that both groups are fretting about the same thing – reducing carbon dioxide emissions in the state – but one seems a bit more attached to, shall we call it, reality. Writer Christian Wade doesn’t miss this, either, via the area’s Congressional representative, Seth Moulton (D-Mass.): Moulton,said he finds it “ironic” that environmental gro...

Timothy Rausch The following is a guest post by Timothy Rausch, Talen Energy’s Senior Vice President and Chief Nuclear Officer Companies that operate America’s nuclear energy facilities today have made significant progress in their evaluations of  seismic safety  as part of a series of actions the industry is taking to implement  lessons learned from the 2011 Fukushima accident . The Nuclear Regulatory Commission in 2012 required energy companies to reevaluate potential seismic hazards for each of America’s 99 reactors. Nuclear energy facilities were designed and built with extra safety margin, in part  to be able to withstand an earthquake even beyond the strongest ever at each site . Nonetheless, over the past decades, the industry has re-evaluated the seismic safety of its facilities. Each time new seismic information became available, plant operators have confirmed, and in many cases, enhanced the facility’s seismic protection.  The nuclear indus...

Jim Slider Fifteen years ago, the NRC and industry cooperated on reforming the way in which NRC decided where to focus its attention across the U.S. fleet of power reactors.  Among the guiding principles of the reform was to make NRC decisions on operating reactor oversight more transparent and predictable, and ensure that additional NRC resources were applied where they would have the greatest benefit to safety.  Combining performance indicators and inspection results, the Reactor Oversight Process ( ROP ) is widely regarded as far superior to the largely subjective and non-public method it replaced.  Over its 15 year life, the ROP has evolved.  As NRC and industry learned from experience, adjustments were made in various features of the ROP to ensure the program continued to meet its objectives and adhere to its guiding principles.  Two years ago, at the Commissioners' direction, the staff undertook an independent review of the ...

John Keeley Outage management at nuclear power plants over the years has evolved into a sophisticated and meticulously chronicled endeavor, carried out over the course of about 30 days. This month I am being afforded an insider's view of Palo Verde unit 2's outage , and the planning and coordination associated with more than 10,000 jobs being carried out this month within the unit is nothing short of staggering. The work performed during refueling outages is a cornerstone for reliable operations throughout the following operating cycle. The Palo Verde Nuclear Generating Station is perhaps the best-practiced site in outage work across the U.S. nuclear fleet, and for an obvious reason: by virtue of having three units, with staggered outage schedules, they carry off two refueling outages each and every year. Outage management at Palo Verde, to this observer's eyes, is as close to an exact science as is possible in this industry. Nuclear plants e...

Bob Bement The following is a guest post by Bob Bement, Senior Vice President of Site Operations at Palo Verde. Palo Verde has taken the lead for a number of industry initiatives, including the implementation of the Diverse and Flexible Coping Strategies (FLEX), which improves a licensee’s defenses against some of the most extreme external events that a plant could face. Continuing in our lead efforts, we will be among the first plants to adopt Technical Specifications Task Force Traveler 505-A, Risk-informed Completion Times. Implementation of this initiative will allow us to use plant-specific safety analyses to manage equipment outages supporting safe and efficient generation of electricity for a substantial portion of the population in the Southwestern U.S. From the onset of operation of commercial nuclear reactors in the U.S., technical specifications were developed for plants to govern key operational constraints. These constraints include the amount of time that equipme...

An incipient fire detection system at Harris. The following is a guest post by Tom Basso, Director of Engineering Programs, and Elliott Flick, Senior Director of Engineering Operations, at Exelon. Over the course of several decades, the nuclear industry and NRC have worked together to continuously improve fire safety at the nation’s nuclear reactors. By constantly examining relevant operating experience, we have been able to take on plant upgrades and make improvements to plant programs to reduce the probability and consequences of potential fire events. One major effort in this area has involved National Fire Protection Association Standard 805 , "Performance-Based Standard for Fire Protection for Light-Water Reactor Electric Generating Plants” (NFPA 805). This standard provides one approach to implementing fire protection at nuclear reactors, and while adoption of the standard is voluntary, roughly a third of the nuclear power plants in the U.S., including several Exel...