scholarly journals Effect of pH on the release of radionuclides and chelating agents from cement-solidified decontamination ion-exchange resins collected from operating nuclear power stations

1991 ◽  
Author(s):  
C.V. McIsaac ◽  
D.W. Akers ◽  
J.W. McConnell
Keyword(s):  
Ion Exchange ◽  
Nuclear Power ◽  
Chelating Agents ◽  
Ion Exchange Resins ◽  
Effect Of Ph ◽  
Power Stations ◽  
Exchange Resins

Experience in Operating Mobile Solidification Plant for BNFL Environmental Services

2003 ◽  
Author(s):  
Jim Porter
Keyword(s):  
Ion Exchange ◽  
Pond Water ◽  
Radioactive Wastes ◽  
Environmental Services ◽  
Ion Exchange Resins ◽  
Cooling Pond ◽  
Power Stations ◽  
Active Waste ◽  
Exchange Resins ◽  
Filter Aids

UK power stations have generated wet radioactive wastes, principally from operation of treatment plants for cooling pond water and liquid effluents. These include ion exchange resins, filter backwash sludges, flocs, pond sludges, filter aids, and miscellaneous oily sludges. To treat these wastes, it was concluded that mobile plants offered significant benefits compared with the alternative of constructing fixed installations. NSG Environmental Ltd designed and built a Mobile LLW Solidification Plant, which we have operated on behalf of BNFL Environmental Services and its predecessors for over twelve years. Since commencing active operations in 1991 the plant has successfully performed 28 campaigns on 13 nuclearlicensed sites. A total of nearly 3,000 drums of active waste have been processed during those campaigns. There have been no failures to solidify wastes, no excessive doses to operators and no transport incidents.

Heat-treatment and storage technology for spent ion-exchange resins for new-generation nuclear power plants

Atomic Energy ◽  
2012 ◽  
Vol 111 (4) ◽  
pp. 276-281
Author(s):  
D. N. Babkin ◽  
N. A. Prokhorov ◽  
V. T. Sorokin ◽  
A. V. Demin ◽  
V. V. Iroshnikov
Keyword(s):  
Heat Treatment ◽  
Ion Exchange ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Ion Exchange Resins ◽  
Storage Technology ◽  
Exchange Resins ◽  
New Generation ◽  
And Storage

Radiocarbon measurements in cemented ion-exchange resins

2012 ◽  
Vol 1475 ◽  
Author(s):  
Stasys Motiejunas ◽  
Algirdas Vaidotas ◽  
Jonas Mazeika ◽  
Zana Skuratovic ◽  
Violeta Vaitkeviciene
Keyword(s):  
Ion Exchange ◽  
Nuclear Power ◽  
Inorganic Compounds ◽  
Liquid Radioactive Waste ◽  
Ion Exchange Resins ◽  
Near Surface ◽  
Solidified Waste ◽  
Order Of Magnitude ◽  
Exchange Resins

ABSTRACTA large amount of liquid radioactive waste has been generated at the Ignalina Nuclear Power Plant (NPP), Lithuania, during its operation. The contaminated liquids are treated with ion exchange-resins, which will generate significant waste stream for cementation. The cemented waste will be disposed of in a near-surface repository. The preliminary safety assessment uncovered that 14C is the most significant radionuclide affecting long-term safety of the closed repository. The method of combined acid striping and wet oxidation with subsequent catalytic combustion has been applied for 14C measurements in cemented ion-exchange resins. It allows separating organic and inorganic compounds from the same sample. At first, the inorganic fraction was extracted by adding acid to the sample followed by absorption of CO2 in a pair of alkali gas washed traps. The remaining carbon was extracted by application of a strong oxidizer. The preliminary results show that activity concentration of 14C in the solidified waste has an order of magnitude of tens and hundreds Bq per gram.

Solidification of Microbiologically Treated Ion-Exchange Resins Using Portland Cement-Based Systems

1992 ◽  
Vol 294 ◽  
Author(s):  
Ari Ipatti
Keyword(s):  
Ion Exchange ◽  
Portland Cement ◽  
Nuclear Power ◽  
Setting Time ◽  
Waste Product ◽  
Ion Exchange Resins ◽  
Portland Cements ◽  
Solidified Waste ◽  
Exchange Resins ◽  
Microbiological Treatment

ABSTRACTPretreated inactive ion exchange resins from the Loviisa nuclear power plant (NPP) were first reduced to one tenth of the original volume through microbiological treatment. During the process, the granular ion exchange resins were decomposed to result in dregs, which were solidified with two types of Portland cements. The objective of the present experiments was to investigate whether commercial cements are suitable solidification agents for this kind of waste.A total of ten mixtures were pretested for their rheological and setting properties. On the basis of the pretest results, four additional mixtures were chosen and tested for the spread value, density, air content, setting time and bleeding of the fresh waste product and for the dimensional stability and compressive strength of the hardened waste product. The cementing systems incorporated in the tests were ASTM type V Portland cement and ASTM type P Portland Composite cements. The dregs used in the tests were taken from a Pilot-Plant experiment at the Loviisa NPP and contained 2 wt-% solids.The test results were promising in showing that microbiological dregs can very easily be solidified with Portland cements to form a high-quality waste product. Thus, the microbiological treatment of spent ion exchange resins will drastically decrease the amount of solidified waste to be disposed of at the Loviisa NPP.

scholarly journals Prolongation Technology of Life Time of Ion Exchange Resins in Nuclear Power Plants

2018 ◽  
Vol 29 (4) ◽  
pp. 188-194
Author(s):  
Takeshi IZUMI ◽  
Makoto KOMATSU ◽  
Tatsuya DEGUCHI
Keyword(s):  
Ion Exchange ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Life Time ◽  
Ion Exchange Resins ◽  
Exchange Resins
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