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Final Review of the Study on Supplemental Treatment Approaches of Low-Activity Waste at the Hanford Nuclear Reservation Review #4 (2020) / Chapter Skim
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Appendix B: Executive Summary from the Federally Funded Research and Development Center's Report of Analysis of Approaches to Supplemental Treatment of Low-Activity Waste at the Hanford Nuclear Reservation
Pages 87-90

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From page 87...
... is treated Hanford liquid radioactive waste that cannot be treated and solidified by the currently planned first Low Activity Waste (LAW) systems within the Waste Treatment and Immobilization Plant (WTP)
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From page 88...
... • Iodine removal is not needed for on-site disposal of grouted or steam reformed wasteforms, as suming best performing grouted and high performing steam reformed wasteforms. • Grouting and steam reforming offer significant cost benefits over vitrification.
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From page 89...
... TABLE 1 High-Level Comparison of the Five Representative Cases for Immobilization of Hanford SLAW per the Analysis Criteria Specified in NDAA17 GROUTING CASE 2: STEAM REFORMING STEAM REFORMING VITRIFICATION CASE: GROUTING CASE 1: DISPOSAL OUT OF STATE CASE 1: SOLID MONOLITH CASE 2: GRANULAR DISPOSAL ON-SITE AT DISPOSAL ON-SITE AT WASTE CONTROL PRODUCT DISPOSAL ON- PRODUCT DISPOSAL OUT NDAA CRITERIA HANFORD AT HANFORD SPECIALISTS (WCS) SITE AT HANFORD OF STATE AT WCS SKS/OBSTACLES • Difficult to build and operate • Requires pretreatment of • Requires pretreatment of • Requires most technology • Requires most technology because highly complex organics organics maturation maturation process • Requires wasteform validation • Requires wasteform validation BENEFITS • Similar to technology being • Low integrated complexity • Low integrated complexity • No liquid secondary waste built for first LAW 89 • No liquid secondary waste • No liquid secondary waste • No liquid secondary waste COST ~$20B to ~36B ~$2B to ~$3B ~$5B to ~$8B ~$6B to ~$12B ~$9B to ~$17B YEARS NEEDED 10-15 years 8-13 years 8-13 years 10-15 years 10-15 years BEFORE STARTUP • Primary waste is compliant • Likely meets requirements • Compliant following organics • Likely meets • Compliant REGULATORY • Secondary waste may require after organics pretreatment pretreatment technical requirements COMPLIANCE Iodine mitigation • May require iodine mitigation
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From page 90...
... • Secondary waste generated from vitrification will require additional wasteform development and treatment capabilities. Several key aspects of this study may benefit from further verification and technical analysis to increase confidence in several cases.
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Key Terms

  • liquid secondary
  • slaw treatment
  • steam reforming
  • steam reformed
  • tank waste

  • reformed wasteforms
  • low temperature
  • low activity
  • treatment technology
  • waste treatment

  • activity waste
  • waste generated
  • currently planned
  • performing grouted
  • secondary wastes

  • primary waste
  • hanford tank
  • increased storage
  • slaw facility
  • require additional

  • iodine removal
  • addresses primary
  • solid secondary
  • ultimately select
  • current planning

  • immobilizing law
  • analysis results
  • vitrification produces
  • offgas treatment
  • performing steam


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