PUD will host meeting; NuScale Power will be discussed
- By Stephen Heiser -
According to a report in THE OLYMPIAN, the Grays Harbor Public Utility District is considering pitching in $25,000 to get in on the ground floor of a new statewide effort to build five to eight small-scale nuclear power plants, according to The Daily World of Aberdeen. The push is being spearheaded by Energy Northwest, a group of 22 public utility districts and five municipalities.
Officials from Richland-based Energy Northwest will join the PUD commissioners for a public workshop to discuss the endeavor at 3:30 p.m. Monday at the PUD’s commission chambers in the Nichols Building at 220 Myrtle St. in Hoquiam.
According to Greentech Media, the discussion in part will likely focus on NuScale Power. Spun out of Oregon State in 2007, NuScale wants to build light water reactors (LWRs) that can produce approximately 40 megawatts of electricity or 150 megawatts of thermal power. The systems are small with the reactor vessel measuring only 14 feet in diameter and comes encased in a 60-foot long container made from three-inch thick steel-but they can be deployed in arrays of up to 24 reactors if necessary.
A single integrated reactor could weigh about 300 tons. The plant will use six foot fuel rods instead of the standard 12 foot rods, according to the company's website. (We've played phone tag with NuScale for several days.)
The reactor will largely be made from standard or slightly modified components currently used in the nuclear industry, which, ideally, will simplify construction.
The key selling point, however, is that the water to cool the reactor circulates passively, which eliminates the need for pumps and reduces the need for external power. More importantly, the absence of pumps greatly mitigates the chance of a "loss of coolant accident." The coolant, along with the reactor, is effectively sealed inside of the 60-foot steel container.
While NuScale is expected to be at the hearing because of previous activity with utilities in this area, the company may not be alone or be the only one mentioned. Hyperion Power Generation, spun out of Los Alamos Nuclear Lab, has been advocating the idea of small reactors for over a year.
TerraPower, a start-up created inside Intellectual Ventures, the incubator founded by former Microsoft chief scientist Nathan Myhrvold, is trying to build small scale nuclear reactor that runs on depleted uranium, the waste product of current nuclear plants. Babcock & Wilcox, which has built nuclear reactors for decades, has also entered the market for micro nukes with M-Power.
Hyperion's proposed reactor has about half of the power capacity, but is about the size of a common hot tub. NuScale's power plant would need to be refueled every two years, while Hyperion says it would need refueling every five years. TerraPower wants to bury its reactor for 30 to 60 years without bothering it.
Energy Northwest, a joint operating agency of utilities in the Northwest, has been preparing a report since the beginning of 2009 on small, modular reactors. NuScale CEO Paul Lorenzini made a presentation to the Energy Northwest Board of Directors in January 2009.
Lorenzini stated at the hearing that the costs, in 2007 dollars, of a complete NuScale power plant that could put out 500 megawatts of electricity would come to $3,500 to $4,500 per kilowatt and costs would decline as the overall size of the power plant would increase. (A 500-megawatt power plant presumably would consist of at least 13 modular 40-megawatt reactors.)
Such a plant could become operational within four and a half years after construction commences.
NuScale hopes to submit design certification documents to the Nuclear Regulatory Commission by the end of next year. NuScale can trace its history back to a research project kicked off by the Department of Energy that began in 2003. The work was then transferred to Oregon State.
In April of last year, it signed a memorandum of understanding with Kiewit Power Constructors, one of the major contractors for power plants. In April of this year, Tom Marcille, formerly the chief engineer for advanced reactors at Los Alamos National Laboratory, joinedNuScale. The company also said that in 2008 it demonstrated it could make the necessary components for its reactor in the U.S. It also shared safety data with leading experts.
The Grays Harbor hearing may also delve into the issue of how or whether to deploy modular reactors for the gridr. Hyperion mostly has talked about deploying its reactors at military bases, mines and remote communities. The meeting notice for Grays Harbor says:
"Grays Harbor PUD is looking toward the future, planning now for the energy we will need to serve our customers tomorrow. That means looking at different types of technology for clean energy resources."
At the January meeting at Energy Northwest, Lorenzini stated that the agency's report could possibly serve as a basis for an application to "construct and operate a power plant in the Tri-Cities."
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Depleted uranium is not 'the waste product of current nuclear plants', except indirectly. It's what's left over after the fuel enrichment process prior to the fuel seeing the inside of a reactor core.