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Alternative High-Level Waste Treatments at the Idaho National Engineering and Environmental Laboratory (1999) / Chapter Skim
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12 What Should Be Done: Sodium-Bearing Liquid Waste
Pages 101-106

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From page 101...
... precipitation by sequential lanthanum fluoride precipitation. 1h contrast, a sixth solidification treatment method, calcination in a repermitted calciner, is a thermal process producing a calcine waste form.
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From page 102...
... SBW Option 2: Acid Diction, Neutralization, And Direct Evaporation The excess acid in SBW would be destroyed by addition of formic acid during an evaporation-concentration step with a conventional evaporator. The concentrate, containing little excess acid, would be neutralized with NaOH to a pH of about 8 to 10, precipitating most of the polyvalent metals (mostly Al)
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From page 103...
... The solids fraction would be dehydrated, converted (e.g., by grouting) to a monolithic solid, if required to meet transportation or repository acceptance criteria, and shipped to a suitable TRU repository as RH-TRU waste or stored on-site.
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From page 104...
... Combining the SBW and HLW calcine would force He SBW to become classified as HLW via mixing, Hereby res~icting disposal op~ons.3 The co~nmittee's proposal to remove the SBW from He HLW stream achieves greater HLW volume reduction Han He specific proposal in He preceding fraction from dissolved Nevada fused rock (from Nevada Test Site tests) by precipitating a hydroxide precipitate from dissolver solution with ammonia, dissolving that in 2 to 3 molar (M)
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From page 105...
... The cost consequences of these actions cannot be well quantified at present. What Should Be Done: Sodium-Bearing Liquid Waste 105
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Key Terms

  • tru repository
  • suitable tru
  • sbw option
  • disposal options
  • final waste

  • waste form
  • treatment options
  • waste streams
  • fluoride precipitate
  • treatment methods

  • volume reduction
  • adding sodium
  • solidification treatment
  • sodium borate
  • hlw volume

  • rcra metals
  • salt cake
  • calcine waste
  • insoluble metal
  • liquid sbw

  • metal hydroxides
  • solids fraction
  • rare earth
  • excess fluoride
  • fluoride precipitation

  • treatment method
  • lanthanum fluoride
  • tru fraction
  • nevada fused
  • site tests


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