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Appendix F- Detailed Description of Alternative 3: DOVrtl.2001a 1 Entombment with Internal Waste Disposal Rev. QLP_rjfLfl RediinelStrikeout 1 size and weight reauirements would be coordinated with ERDF operations during final 2 design if this alternative is selected. 3 4 5. No surface contamination removal from the interior surfaces of 221-U is included in 5 Altemative 3. All concrete surfaces would receive applications or fixatives. 6 7 6. Removal, decontamination, and demolition operations for contaminated equipment beieg 8 stored-insidc of 221-U would be performed using conventional, proven technologies. 9 10 7. Following mechanical modifications and recertification, the existing main crane in the 1 I 221-U Facility would be functional and ready for use in Alternative 3 activities. Crane use 12 would be limited to moving of equipment from the process cells to the eanyon eperming 13 deekcanvon deck where the equipment would be reduced in size and volume, as necessary, 14 and then placed back into the process cells. The main crane would also be used to move the 15 equipment from the canyon deck during size and volume reduction and to place the 16 equipment into the process cells. Cover block movement would be completed using the 17 crane during these activities. 18 19 8. All underground piping systems located beneath the environmental cap footprint for 0 Alternative 3 would be grouted in olace or removed as patt of the altemative , depending on ^1 L outcome of risk assessment work . 4his-]f removed. waste would be disposed at ERDF. 22 23 1 9. The 221-U 6anyen eperetingieek canyon deck elevation is estimated at 221.5 m(726.5 ft). 24 25 10. The canyon interior (including the process cells, trench, and associated ventilation tunnel) 26 and the rail tunnel interior are considered to be contaminated. The galleries are considered to 27 be uncontaminated except for some areas of the southeast wall that would require fixative 28 application. 29 30 11. The 221-U Facility is located within the exclusive land-use boundary identified in the Final 31 Hanford Comprehensive Land-Use Plan Environmental Impact Statement (DOE 1999) and 32 the associated "Hanford Comprehensive Land-Use Plan Environmental Impact Statement 33 (HCP EIS), Hanford Site, Richland. Washington: Record of Decision (ROD)" (64 Federal 34 Regtrfer61615). This implies that the U.S. Department of Energy (DOE) would remain in 35 control of the 200 Areas and industrial-exclusive land use would be limited to waste 36 management activities. 37 38 12. Only remediation waste generated at the Hanford Site would be disposed in the facility. 39 Immobilized low-activity waste was considered but is not included in waste inventory for 40 disposal at 221-U. 41 42 13. Waste containers would be open-top cargo containers. The containers would have the approximate dimensions of 5 in long by 2.4 in wide by 2.6 in high ( 16 ft by 8 ft by 8.5 ft). 44 This size would allow container placement two abreast on the eanyen-eperatiflgtiec-kcanvon Final Feaaibitity Srudy for the Canyon Disposition lnitiative (221-U Facility) June 2007 F-3
Appendix F -Detailed Description of Alternative 3: DOFJRL-2001-11 IEntombment with Internal Waste Disposal Rev. e,-df n Redline/Strikenut 1 ^ 92;1. Containers would be placed using special shielded forklifts designed to limit operator 2 exposure during container handling. 3 4 14. Waste received for placement would arrive at the site containerized in the cargo containers 5 complete with an application of fixative to the container interior. Costs associated with 6 placing waste into the containers and application of the fixative would be incurred by the 7 waste generators and are not included in this altemative. 8 9 15. Backfill around exterior of the 221-U and waste inside the canyon would be placed evenly as 10 the building is gradually filled with waste to prevent a large differential load on the canyon 1 I wall. Waste would be placed in lifts along the full length of 221-U to eliminate the potential 12 of a large load difference between adjacent sections of the building. 13 14 16. Due to the uncettainties associated with both the volume of contaminated equipment 15 ^ currently located on the eanyon o deelicinyan deck and inside of the process cells 16 and the degree of equipment volume reduction that is achievable, it is assumed that only this 17 contaminated equipment would be disposed in the 221-U process cells. It is further assumed 18 that there is not sufficient space to accept additional waste from other sites for placement 19 inside the process cells. The exception is cell 3, which is expcxted to have room for 20 ^ placement of waste in addition to that from the eanyeneper ' 22 17. The existing 0.6•m{tiameter cell drain header located beneath 221-U would be grouted solid 23 to immobilize contamination in this pipe. 24 25 18. A new ventilation system with replaceable high-efficiency particulate air (IIEPA) filter banks 26 would be installed on the northeast end of the 221-U roof. It would replace the existing 27 ventilation tunnel and stack ventilation system. The new ventilation system would stay in 28 operation until the canyon is filled with waste and grouted. 29 30 19. Internal void spaces associated with wastes disposed inside of 221-U would be filled with 31 grout and pressure grouted. Where large voids are grouted (such as around the cargo 32 containers and inside the cells), a low-cement-content grout would be used. This grout 33 would have a limited potential for heat buildup due to a low heat of hydration, yet would 34 provide sufficient compressive strength for the intended service. 35 36 20. While sources for some materials required for construction of an environmental cap have not 37 yet been identified, it is assumed that sufficient quantities of materials necessary for the clean 38 fill and construction of the environmental cap are available locally. 39 40 21. A modified Resource Conservation and Recovery Act of 1976 (RCRA) Subtitle C engineered 41 barrier would be constructed to protect the 221-U Facility and its contents from infiltration 42 and intrusion. ^ 43 44 Final Feasibility Study for the Canyon Disposition Initiative (221-U Facility) J une 200 F-4
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AR TARGET SHEET The following docum
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(^N r^ r Proposed Plan for the Cany
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i^ f 1 2 3 S 6 7 8 9 11 12 13 14 15
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(^N (0-^, (^N 1 2 3 r• • .`•
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^ (^N t^ the steHitFths+amedielaeti
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o"N DOF/RIr2001-29 Draft D Redline/
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(^N i0,"% / ' DOF/RL-2001-29 Draft
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I f^ ^ DOE!RL-2001-29 Ikaft D Redli
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! ' t^ Project Prepare the existing
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f ' ^ rN 100 I Noise, Visual, and A
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^ POINTS OF CONTA CP ^ U.S. Drnartm
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f^ n DOF/RL-2001-29 Draft D Redlinc
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noFIRL-2001-11 Rev. p 1 1)raft P ^
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^ ^ 1 2 DOFJRL-2001-11 Rev.A 1 Dra(
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. . .,.. Appendix C - Risk Modeling
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t^ Appendix C - Risk Modeling of an
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(_^% ^ ^ 11 Appendix C - Risk Model
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(0"% t^ DOFJRL-2001-1 l Rev. N 1 Dr
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Page 45 and 46: Appendix D- Slope Stability Analysi
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Page 67 and 68: Appendix E - Detailed Description o
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Page 127 and 128: ^N r^ 1 n DOF/RLr2061-1 l ' Rev. I
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- •s. t .W ;. . Appendix G - Deta
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.. . .,. .. . Appendix G- Detailed
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Appendix G - Detailed Description o
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Appendix G -Detailed Description of
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^ . , , ,... Appendix G - Detailed
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^• f f 2 3 Appendix G- Detailed D
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Appendix G - Detailed Description o
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Appendix G- Detailed Description of
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^• ^ Appendix G - Detailed Descri
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^ ^ t"'^N 1 2 DOElRL-2001-I1 Rev. 9
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t^N (M"N Final Feasibifity Stady ja
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(00^1 2 3 4 5 6 7 8 9 10 11 12 13 1
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,.r.. . Appendix H - Detailed Descr
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(^\ Appendix H - Detailed Descripti
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Appendix H - Detailed Description o
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Appendix N- Detailed Description of
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Appendix It - Detailed Description
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(^N 5 6 7 8 9 to 11 12 13 14 15 16
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^N i ' (0-1% C Appendix H- Detailed
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^ (' ^ Appendix H- Detailed Descrip
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Appendix H-Detailed Description of
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f^ ^ DOFJRL-2001-I I Rev. N raft Rc
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f^ ^ 1 2 DOFlRI.-2001-11 Rev. pI af
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I ,.,. , ... . DOFJRI.-2001-11 Appe
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^ DOF/RL-2001-11 I Appendix I - Dec
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DOFJRI.-2001-11 I Appendix I- Decom
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^ DOFlRI.•2001-11 Appendix I -Dec
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^'. DoEIR1.-2001-11 Appendix I-Deco
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^ ("` ^ DOFJRI.2001-11 Rev. G I. Dr
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^ r^, TABLES DOFJRIr2001-11 • Rev
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^ Appendix J- Applicable or Relevan
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t^ ^ Appendix J-Applicable or Relev
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^ Appendia J- Applicable or Relevan
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