solidification  of wastes with  nochaR's polymers


High Technology Engineered Polymers

  • N910 polymer, applied to all organic liquids - Thermoplastic elastomer: styrene block copolymer
  • N960 polymer, applied to all aqueous liquids - 100% cross linked, co-polymer of acrylamide
  • N935 polymer, applied to light alcohols

Thus the choice of the NOCHAR polymer to be used depends on the nature of the effluent to be immobilized, alone or as a mixture.


IMPLEMENTATION

Absorption et solidification du liquide

Quick reaction
Slow speed mixing
Mass ratios "liquid:polymer" vary depending upon the chemical composition of the waste
• Oil : 1:1 à 3:1
• TBP : 1:1 à 2:1
• Mixed sludge types : 2:1 à 4:1
• Aqueous solutions : 2:1 à 5:1

Minimal volumetric increase in the solidification process: less than 10%

 

 We strongly recommend that each waste stream undergo a bench test, in order to verify the composition of the solution, to determine the best polymer formula for solidification and to determine appropriate and safe solidification ratios, based on liquid : polymer by weight.


ADVANTAGES :

  • Stabilized final waste (no degradation), non-leaching

and solid,

  • No heat build up, no heat release in the

process;

  • Non toxic and worker friendly products
  • High Resistance to radiation - 2.7 MGray Cobalt 60, gamma source
  • If apart from organic liquids, the liquid contains
    an aqueous phase, a combination of various
    polymer materials is used
  • Disposal options:
    • Incineration: Cyclife (France, Sweden) and
    Belgoprocess (Belgium)
    • Encapsulation in cement
    • Direct disposal into carbon steel drums or
    high integrated (HIC) liner then into drums

Télécharger
Nochar Technical sheet
Download NOCHAR GB.pdf
Document Adobe Acrobat 125.0 KB

Representative Projects since Year 2001



  • US Department of Energy, Mound, Ohio
    • Pump oil with tritium; 50 000 curies over a 3-year period. Disposal at Nevada NS Site


  • US Department of Energy, Mound, Rocky FLats, Colorado
    • One of the first nuclear weapons complex to undergo full decommissioning
    • All liquid waste contained plutonium
    • Methanol solution with organic contaminants
    • Mixed organic waste with carbon tetrachloride and trichloroethylene
    • Spent pump oil
    • Disposal at waste Isolation Pilot Plant (WIPP) for Transuranic waste forms
Rocky Flats Facility
Rocky Flats Facility
Oil + Pu solidification
Oil + Pu solidification
Packaging for Final Disposal
Packaging for Final Disposal



  • France : CEA CADARACHE LOR (organic solutions containing Xylene and TBP) conducted by ORANO DS (previously named AREVA)

 LOR sample n°20 - Composition : 13% (xylene, mesitylene, diphenyloxazol, , TBP, ) and 87% water

 LOR sample N°75 - Composition : 9,6% TBP and 91,4% water

LOR 75 initial
LOR 75 initial
LOR 75 solidified
LOR 75 solidified

The polymers N910 and N960 were used to allow obtaining a solidified final waste

These organic liquids solidified by NOCHAR products were then cemented and accepted on the ANDRA storage site. They were subject to a specific acceptance procedure.

Télécharger
WM2013 Conference, February 26 – 28, 2013, Phoenix, Arizona, USA NOCHAR polymers: an aqueous and organic liquid solidification process for Cadarache LOR (Liquides Organiques Radioactifs) – 13195
13195.pdf
Document Adobe Acrobat 1.2 MB

Other return of experience from ORANO : CEA Saclay Tank MA508, CEA Marcoule Tank 64.30, SICN Veurey



  • UK Harwell Storage Tube project, remote handled ILW water contamination
    • National Award given by the U.K Nuclear Decommissioning Authority in 2015 for Best Innovative technology for SME
    • Encapsulated in cement; package in 500 liter drums
" Store Tube" at Harwell
" Store Tube" at Harwell
 ILW  waste stream solidified by N960 and encapsulated in cement
ILW waste stream solidified by N960 and encapsulated in cement



  • Romania ; Cernavoda NPP; machine oil with tritium, large scale production 

Solidification of 30 m3 tritiated oil - transported to Studsvik, Sweden then to Belgoprocess, Belgium for incineration

Test to determine the best polymer formula for solidification, based on liquid : polymer by weight.
Test to determine the best polymer formula for solidification, based on liquid : polymer by weight.
Solidification ratio 2,5 : 1
Solidification ratio 2,5 : 1
Mixing directly in 220 liter barrels for incineration
Mixing directly in 220 liter barrels for incineration


  • other FIELD OF APPLICATION: removal of organic liquid residues from solid materials

During the operation of the Cernavoda NPP, a series of waste streams have been generated for waste treatment purposes. One important waste stream is the combination of solid materials and liquid organic waste, creating flammable solids. Flammable solids represent solid materials, such as cloth, plastic, contaminated with oil containg gamma nuclides and H-3 from maintenance activities.


The use of NOCHAR is an effective solution for eliminating the liquid in order to allow the final acceptance  of solid and liquid waste.


You have a project and you would like to have additional information on NOCHAR polymers or receive samples of the products: