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GE-Hitachi and Southern Nuclear to Pair on Fast Reactor Design Advancement

November 6, 2016

GE-HItachi Nuclear Energy (GEH) and Southern Nuclear Energy will collaborate to study the development and licensing of GEH’s PRISM sodium-cooled fast reactor design.

Southern Nuclear Development, a subsidiary of Southern Co. company Southern Nuclear Operating Co. signed a memorandum of understanding to study the high-energy neutron reactor design, as well as to work together toward participating in future U.S. Department of Energy advanced reactor licensing projects.

The companies said in a joint press release on October 31 that the PRISM design has benefited from the operating experience of EBR-II. Developed under the U.S. Integral Fast Reactor (IFR) program, the EBR-II was a 62-MWe prototype that began operations in 1961 at a Argonne National Laboratory site in Idaho Falls, Idaho, and operated for more than 30 years. The prototype was used for testing materials and design concepts and later used to generate power for other site facilities.

The reactor was shut down in 1994. In mid-2015, crews completed work to entomb the reactor, removing and treating the last of the sodium coolant from the reactor’s nine heat exchangers.…

France’s Nuclear Storm: Many Power Plants Down Due to Quality Concerns

November 2, 2016

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[Note: This article will appear in the forthcoming December 2016 print issue of POWER.]

The discovery of widespread carbon segregation problems in critical nuclear plant components has crippled the French power industry—20 of the country’s 58 reactors are currently offline and under heavy scrutiny. France’s nuclear safety chairman said more anomalies “will likely be found,” as the extent of the contagion is still being uncovered.

With over half of France’s 58 reactors possibly affected by “carbon segregation,” the nation’s nuclear watchdog, the Autorité de Sûreté Nucléaire (ASN) has ordered that preventative measures be taken immediately to ensure public safety. As this story goes into production in late October, ASN has confirmed that 20 reactors are currently offline and potentially more will shut down in coming weeks.

The massive outages are draining power from all over Europe. Worse, new questions continue to swirl about both the safety and integrity of Électricité de France SA’s (EDF’s) nuclear fleet, as well as the quality of some French- and Japanese-made components that EDF is using in various high-profile nuclear projects around the world.…

Generators Sue to Block Lifeline for New York Nuclear Plants

October 21, 2016

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A group of generators including Dynegy and NRG Energy filed suit in federal court on October 19 seeking to block an incentive program that would help three New York nuclear power plants remain economic over the next decade.

An August decision by the New York Public Service Commission (PSC) approving New York’s Clean Energy Standard included a provision requiring the state’s investor-owned utilities and other energy suppliers to pay for the intrinsic value of carbon-free emissions from nuclear power plants by purchasing “Zero-Emission Credits” (ZEC). Those credits are added to the wholesale price each plant receives for its power, and the costs are passed on to ratepayers.

Subsidies for New York Nuclear Plants Unlawful, Suit Says

The plaintiffs argue that the plan interferes with wholesale power prices in violation of the Federal Energy Regulatory Commission’s (FERC’s) authority over interstate power sales. In particular, they point to a case the U.S. Supreme Court decided earlier this year, Hughes v. Talen Energy Marketing, which struck down a subsidy program in Maryland on the same grounds.…

Watts Bar Unit 2 Nuclear Plant Completes Power Ascension Testing

October 4, 2016

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The Tennessee Valley Authority (TVA) has reached another milestone in its effort to bring Watts Bar Unit 2 into commercial operation: The unit completed its final power ascension test—a 50% load rejection from full power—and safely returned to full power on September 30.

The testing had been halted on August 30 due to a switchyard transformer fire. Although the fire did not affect Unit 2’s systems, which responded to the event as designed, the affected transformer had to be replaced before testing could resume. The TVA said a rigorous and detailed inspection, repair, and testing process was performed before the transformer was returned to service on September 26.

Power ascension testing included more than 40 required tests at various power levels up to 100% output, with pauses at 30%, 50%, and 75% (Figure 1). The gradual increase in power provided data, which was used to verify that the unit was operating as designed.

1. Watts Bar Unit 2 power ascension testing plan.

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Lloyd’s Register on Current Nuclear Power Challenges

September 6, 2016

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POWER Editor Gail Reitenbach interviewed King Lee of Lloyd’s Register on June 29 at the World Nuclear Exhibition in Le Bourget, France. The firm is a “non-profit distributing charity with a public benefit mandate,” which means that it is independent from shareholders, and profits are distributed to a variety of educational and other charities. Its nuclear group has provided independent, expert technical advice on safety and risk management for more than 60 years, beginning with the UK’s Calder Hall reactors in the 1950s. The UK vote to exit the European Union (EU), known as “Brexit,” had taken place the previous week. Questions and answers have been edited for length and style.

GR: What effect do you think Brexit, if it actually goes through, will have on UK nuclear plans and the European power sector generally?

KL: I think it’s too early to say whether Brexit will happen, and if it does happen, what form it will take, because the details will have to be worked out between the UK and EU countries.…

An Asian Nuclear Duo: Monju Down, Bataan Up?

August 31, 2016

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With costs for a restart escalating, Japan is considering scrapping its troubled Monju fast breeder nuclear reactor, just as a never-started nuclear plant in the Philippines may get a new lease on life.

Monju May Be Finished

Japan Times reported that readying the Monju plant for restart “would cost several hundred billion yen.” Sources said that “a political decision” on decommissioning is likely. The science ministry has been looking for someone to run the 280-MW facility (Figure 1) but has found no takers.

Japan's troubled Monju breeder reactor may be decommissioned after a government agency estimated a restart could cost . Courtesy: Nife/Wikipedia

1. Japan’s troubled Monju breeder reactor may be decommissioned after a government agency estimated a restart could cost billions of dollars. Courtesy: Nife/Wikipedia

Japan’s Nuclear Regulatory Authority (NRA) last year ordered the ministry to come up with a new operator because of the plant’s poor performance. Construction began in 1986, and the plant first went critical in 1994. But a nasty fire caused by a leak of sodium coolant in December 1995 shut the plant down and led to a scandal as the semi-governmental operator at the time tried to cover up the accident.…