Turbines or Cooling Towers: After lengthy studies, the UK recently announced 11 possible sites for new nuclear reactors. Helping reduce the NIMBY concerns is the fact that nine of these new sites are next to existing reactors. One of the other two "greenfield" sites would involve displacing a different type of power plant that doesn't produce carbon emissions.
The tall turbines of Haverigg wind farm, only the second commercial one to be built in Britain, have been turning for 17 years between the hills of the Lake District and the waters of the Duddon estuary on the Cumbrian coast.
...
Six of Haverigg's eight turbines actually fall within the proposed footprint of the Kirksanton nuclear power station, where RWE wants to build up to three reactors. The German energy giant confirms that they would have to be dismantled if the power station were built.
The average wind turbine lasts 20-25 years. By the time the new power plant gets approved--if it ever does, those turbines will likely be on their last legs.
When it comes to the scale of the plants, the power company (RWE) noted the following.
"The wind farm currently produces 3.5 megawatts of energy while a nuclear power station would produce 3,600 megawatts, enough to power five million homes. So, from a climate change point of view, if the wind farm had to go it would not be such a bad thing."
Obviously there are a number of climate change activists who disagree.
Winding Down Wind: Chicago-based Invenergy LLC is a company that generates electricity via natural gas and wind. One of its subsidiaries--Beech Ridge Energy, LLC--is trying to build a 1.5 MW, 124-turbine wind farm in West Virginia. As part of the approval process, the Public Service Commission there mandated that Beech Ridge prepare a decommissioning plan. The company hired a civil engineering firm which offered the following last October.
Booty said the steel wind turbine towers generally are 15 to 16 feet in diameter and about 230 feet tall. The blades of the turbine make up the remainder of its height and are not salvageable, Booty said.
Copper is used in the sections of the turbines where electricity is created, he said. Each of the towers was estimated to have $102,000 worth of salvage value, Booty said.
“To decommission a turbine, it costs about $45,000 per turbine and to haul it off the site would nearly double the cost to about $70,000,” he said.
Removing the 160 steel anchor bolts from their foundations and returning the land back to its former look would cost about another $14,000 per turbine, Booty said.
To decommission all 124 turbines, Booty testified, would cost about $1.7 million, but its salvage value would be $2 million, depending upon steel and copper prices, giving Beech Ridge an economic incentive to tear them down.
Last fall, copper and scrap steel prices were busy collapsing after having been very strong earlier in the year. It makes a big difference whether the engineer used up-to-date prices or ones that were a couple of months old. Nonetheless, there is a fair chance that when the time came Invenergy would be financially motivated to dismantle the wind turbines rather than leave them standing. Regardless, no public service commission should leave that result to chance.
Half Deaths: Decommissioning a nuclear power plant is just a wee bit more involved. Quoting the Nuclear Regulatory Commission...
NRC has very strict rules for shutting down a plant. The NRC requires plants to finish the process within 60 years of closing. Since it may cost $300 million or more to shut down and decommission a plant, the NRC requires plant owners to set aside money when the plant is still operating to pay for the future shutdown costs.
Nuclear power plants can be decommissioned using three methods:
1. Dismantling -- Parts of the reactor are removed or decontaminated soon after the plant closes and the land can be used.
2. Safe Storage -- The nuclear plant is monitored and radiation is allowed to decay; afterward, it is taken down.
3. Entombment -- Radioactive components are sealed off with concrete and steel, allowing radiation to “decay” until the land can be used for other purposes.
A small number of nuclear plants in the U.S. have been decommissioned and are now greenfields. For instance, there's the Yankee Rowe--the Yankee Nuclear Power Station--near Rowe, Massachusetts.
Physical decommissioning of the former Yankee Rowe plant was completed in 2007. The U.S. Nuclear Regulatory Commission (NRC) notified Yankee in August 2007 that the former plant site had been fully decommissioned in accordance with NRC procedures and regulations and formally approved Yankee Atomic’s Final Status Survey Reports in accordance with the License Termination Plan . The federal license for the site was reduced to the approximately 2 acres surrounding the Independent Spent Fuel Storage Installation site.
...
The transfer of Yankee's used fuel from wet to dry cask storage was successfully completed in June of 2003. Yankee’s mission and focus going forward is the safe storage of the plant’s spent nuclear fuel and Greater than Class C waste at the Independent Spent Fuel Storage Installation until the U.S. Department of Energy meets it’s statutory and contractual obligation to remove the material. The storage will be conducted in accordance with the NRC requirements and applicable regulations while the company pursues opportunities with our stakeholders and others to expedite the removal of the material from the site.
Over 100,000 pounds of spent fuel rods encased into concrete and steel are being stored on the decommissioned site. With President Obama having recently stripped the funding from Yucca Mountain, that situation likely won't change for a long while.
A Similar Story: The Trojan Nuclear Power Plant near Rainier OR is also mostly dead. Starting with a Wikipedia quote...
In 2005, the reactor vessel and other radioactive equipment were removed from the Trojan plant, encased in concrete foam, shrink-wrapped, and transported intact by barge along the Columbia River to Hanford Nuclear Reservation in Washington where it was buried in a 45-foot-deep pit and covered in six inches of gravel, which made it the first commercial reactor to be moved and buried whole.
And the rest?
Portland General Electric says it is largely finished decommissioning the former Trojan nuclear power plant bordering the Columbia River south of Rainier. Spokesman Steve Corson said the company finished tearing down Trojan’s “containment building,” which once housed the plant’s nuclear reactor, this fall.
“There are no plans to remove anything further,” Corson said.
The demolition, which involved smashing apart super-thick concrete walls, was one of the final steps in the decades-long process of removing buildings from the landmark plant after it shut down in 1993. The plant is the first large-scale commercial nuclear facility in the U.S. to be decommissioned, the company said.
All that remains of the nuclear facility, which began operating in 1976, are radioactive fuel rods, contained in concrete casks and guarded around the clock. Those, Corson said, will remain at the site until the federal Yucca Mountain radioactive storage facility opens in Nevada.
That waste is now awaiting a new plan.
Recent Comments