Decontaminating, Decommissioning the EBWR

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This set up a subsidiary Zion Solutions for cleanup and environmental restoration, which will return the site and licence to Exelon in about Energy Solutions is disposing of all the low-level radioactive waste at its Clive Utah facility. That is located at a remote, desert site 80 miles west of Salt Lake City. This is set away from geologic fault lines, and has less than 8in of annual rainfall, with very salty ground water that is therefore not used by the surrounding communities. Eventually, spent nuclear fuel from Zion will be disposed in a national geologic repository like the proposed Yucca Mountain site in Nevada.

Solid low-level wastes are disposed of in a ha repository at Drigg in Cumbria, near Sellafield. Intermediate waste is being temporarily stored at Sellafield and other sites. High level wastes are also stored and vitrified at Sellafield. Waste problem The World Nuclear Association reports that 12,t of high-level waste HLW is being produced a year, and mainly stored in interim storage facilities.

Although the most radioactive materials by definition have the shortest half lives, some nuclear waste will need to be isolated for thousands of years. The idea is to encase it in stable ceramic material, encapsulate it, and dispose of it in long-term deep geological sites — buried at a depth that hopefully prevents any discharge over that time.

Such sites need techniques like seismic probabilistic risk assessment SPRA.

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Doug Holderbaum, Director of Westinghouse Engineering Services Systems and Risk Applications, believes this will help improve hazard curves and their impact on seismic design margins and probabilistic risk assessments. The costs of cleaning up Total cleanup costs depend on factors like plant size and design, the decommissioning option being taken, how long waste is stored, where the facility is located, local labour costs, and costs of radioactive waste burial. Postponing decommissioning reduces the radioactivity and so the dismantling costs but increases storage and surveillance costs.

Overall costs depend strongly on the volume of waste to be disposed of, but this can be reduced by using techniques like surface decontamination, compaction and segmentation.

Putting a Plant Out to Pasture

It is anyway hard to predict storage, monitoring and surveillance costs 50 years into the future. It is also hard to guarantee there will not be leaks from storage sites that will push up cleaning costs. Funds need to be set aside while the power plants are operating. In the US, for example, operators are often charging around 0.

Decommissioning Nuclear Reactors Is a Long-Term and Costly Process

There is however general concern that the funds set aside will not be enough to meet the eventual costs. Governments and so taxpayers will end up meeting any extra costs. That would add to the billions of pounds in nuclear subsidies and limitations of insurance liabilities already given by governments around the world to private companies. METKA is a leading international contractor of fully integrated turn-key power generation projects with complete engineering, procurement and construction EPC scope. AAF supplies a range of gas turbine equipment and filters and can carry out repairs, refurbishments and upgrades on gas-powered power plants.

For more than 50 years, the name TAPROGGE has represented innovation and competence in optimisation of water circuits, particularly cooling water circuits in power stations, desalination plants, refrigeration technology and industry. With some 15, TAPROGGE applications in more than countries around the world, the company is at the forefront of this specialist field internationally. Continue Learn More X. Advertise with us. Learn more Hover over the logos to learn more about the companies who made this project possible.

Decommissioning Liability Estimates IAS37

Show me. METKA is a leading international contractor of fully integrated turn-key About METKA is a leading international contractor of fully integrated turn-key power generation projects with complete engineering, procurement and construction EPC scope. Follow Make an Enquiry. Follow this company Follow the company to be always up to date with this company. AAF International. About AAF supplies a range of gas turbine equipment and filters and can carry out repairs, refurbishments and upgrades on gas-powered power plants.

About For more than 50 years, the name TAPROGGE has represented innovation and competence in optimisation of water circuits, particularly cooling water circuits in power stations, desalination plants, refrigeration technology and industry. Recommended article. This is not to be plant specific, rumor, slander or urban legend.

Postings will be reviewed, verified, edited for content, and archived for future reference. Post a summary for review if you wish to post a thesis or position paper. Site Search Forum Rules. SamA Guest.

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I am currently working for the DOE in Idaho. Any publications, contacts, or personal experiences would be appreciated.

Thanks ahead of time, Sam. Hi SamA, Fire off some of your questions here. Have a Great Week! The first question is: have all of the Isotopes and Chemical Constituents been identified to include any surprises. Have the Facility Oldtimers been contacted and questioned? Major problem is that when the characterization team fails to utilize a systemmatic approach one will be unable to: Determine the EXTENT and Type of contamination.

Determine proper instrumentation that will enable detection. When additonal contamination or isotopes are identified in the 11th hour of the game, this is where the problem comes in. It's like the old scouts of the past doing reconisance Sp. Positive characterization up front to include forecasting possibilities remain important. Tell the complete story. Another question being the personnnel involved with the ROD or decision making process.

Are workers qualified? If so, what kind of experience do you have regarding decontamination. Many have little or no experience that may lead to safety and cost overun concerns. If you are decontaminating a Lab, what controls are in place to deal with unknown constituents? Do you have a Chemical Specialist expert on your team?

Washing operation of a road surface washing mechanism for decontaminating radioactive substances

If not, you better have one. If safety is not regarded as the main focus your project may suffer down the road. I'll be posting additonal stuff later when time permits. Be back later. We are excited that we can assess the wealth of real knowledge from folks like you who have experience with these issues. Hi SamA, Couple more items to chew on. What you need to be carefull of is the detection process using handheld intrumentation. You have to nail down the Scan MDC numbers and have an expert assist you. One item that many still do not understand is the fact that there are some major flaws with the MDA concept and this expert should account for that when determining Scan MDC rates.

There is a paper publiched by Dr.

The Decommissioning Of The USS Enterprise

Marty Jamieson that provides great information. I now understand that many so called contact measurements using check sources are not at contact but further away than anticipated and must be accounted for. You will have a much better efficiency the traditional way vice the other. They instituted a correction factor of ! NCRP ! Great job by that team! Anyway, the next item is instrumentation. Right tool for the right isotope. Another important item is communication.


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If your head person is a know it all, your project is doomed because it is physically impossible. When you hire personnel one should ask how many licenses were terminated and were they under budget?


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Of great importance is their past projects Safety Record too. This is where it starts to get tricky. If you don't walk the talk you are cooked!

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