The Department of Energy and Idaho National Laboratory announced this week that the sixth major core overhaul of the Advanced Test Reactor (ATR) is complete, after an 11-month outage that began in April 2021. The ATR was built as a key piece of mission support for U.S. Navy programs and first reached full power in 1969. Today it remains “the world’s largest, most powerful and flexible materials test reactor,” in the words of INL—quite a feat for a reactor that was planned over 60 years ago.

In this first installment of a #ThrowbackThursday post, Nuclear News provides a review of radioisotope-powered pacemakers in response to an article in The Wall Street Journal. The article, published earlier this week, looks at the issue of disposing of nuclear-powered pacemakers, although considering how few are still in use today, it seems like this is really much ado about nothing.

Rempe

The Nuclear Regulatory Commission’s Advisory Committee on Reactor Safeguards has elected Joy Rempe as chair, Walter Kirchner as vice chair, and David Petti as member-at-large. All three are ANS members.

“I am honored that my colleagues on the ACRS elected me to this position,” said Rempe, of Rempe and Associates. “The leadership team looks forward to ensuring that the ACRS continues its tradition of providing the commission advice on safety issues.”

Bios: Rempe has more than 35 years of experience in the areas of reactor safety and instrumentation performance. Prior to retiring as a Laboratory Fellow at Idaho National Laboratory, she founded an instrumentation development and deployment laboratory, which supported irradiation testing in U.S. and international facilities.

In March 1972, Stephen Hanauer, a technical advisor with the Atomic Energy Commission, met with Norman Rasmussen, a nuclear engineering professor at the Massachusetts Institute of Technology. The AEC had recruited Rasmussen to develop a report, The Reactor Safety Study (WASH-1400), to estimate the probabilities and consequences of a major nuclear power plant accident. With thousands of safety components in a modern reactor, the task was mind-boggling. Rasmussen proposed a novel approach based on more powerful computers, “fault tree” methodology, and an expanding body of operational data. By calculating and aggregating probabilities for innumerable failure chains of components, he believed he could develop a meaningful estimate of overall accident risk. WASH-1400 would be a first-of-its-kind probabilistic risk assessment (PRA).

The American Nuclear Society has selected a group of Black former students known as the Tennessee-85 to receive the inaugural Social Responsibility in the Nuclear Community Award. The 85 former students are receiving the honor in recognition of their bravery and leadership displayed in desegregating an Oak Ridge school in Tennessee in 1955. A co-recipient of the award is the Secretary of Energy for the leadership displayed by the Atomic Energy Commission (now the Department of Energy) in ordering the all-white Oak Ridge public schools to integrate that year. The award will be presented at the upcoming ANS Winter Meeting.

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After decades of relinquishing its value and return on investment as “emission-free” electricity generation, segments of the nuclear industry are pursuing actions in several states to secure emission credits for avoiding greenhouse gas emissions. To harmonize electricity market stability and greenhouse gas emission reduction goals, states such as New York and New Jersey have enacted programs to award zero emission credits (ZECs) to nuclear plants for their emission-free output.

Dearly earned and too long forgone, air emission credits have been the economic birthright of the nuclear industry since the passage of the 1990 Clean Air Act (CAA) amendments, when emission control capability first became a tradable commodity. Yet it took until 2016 for ratepayers and shareholders to receive even a small fraction of this valuable return on investment.