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^ ..'. / Appendix H- Detailed Description of Alternative 6: DOE(R1.-2001-11 Close in Place - Collapsed Structure 1tev.1A rA(t $edline/Strikcou{ 7. Following minor mechanical modification and recertification, the existing main crane in the 221-U Facility would be functional and ready for use in Alternative 6 activities. Crane use would be limited to moving of equipment from the process cells to the canyon fieer4 c c where the equipment would be size reduced as necessary and placed back into the cells. The main crane would also be used to move the equipment from the canyon deck during size and volume reduction and placement into the process cells. The crane would be used for cover block movement, as well. 3^ 4 5 6 7 8 9 8. All underground piping systems located beneath the environmental cap footprint for 10 Alternative 6 would be ¢routed in place or removed based on the outcome of risk as 11 work. -This-J(:removed. the waste would be disposed at ERDF. 12 13 14 15 16 17 18 19 9. The 221-U Canyon Aeerdc k elevation is estimated at 221.5 m (726.5 ft). 20 11. The 221-U Facility is located within the exclusive land•use boundary identified in the Final ^21 Hanford Comprehensive Land-Use Plan Environmental Impact Statement (DOE 1999) and 22 the associated "Hanford Comprehensive land-Use Plan Environmental Impact Statement 23 (HCP EIS), Hanford Site, Richland, Washington: Record of Decision (ROD)" (64 Federal 24 Register 61615). This implies that the U.S. Department of Energy (DOE) would remain in 25 control of the 200 Areas and industrial-exclusive land use would be limited to waste 26 27 management activities. 28 12. Decontamination limits for loose surface and fixed contamination would be based on 29 preliminary remediation goals. 30 31 nteFy fer 32 dispesel et921U. 33 44:1LOnly Aemedietien-lcgacv eauinment from 221-U 34 Rrocess cells and tmeratiagAocxt:anyon deck would be disposed in the facility. No new 35 waste from outside 221 -ILwould be placed in the process cells or galleries or around the 36 37 38 39 40 41 42 43 exterior of the buildinp- 44 45 46:J4. Because of the uncertainties associated with the volume of contaminated equipment currently located on the canyon fleerie and inside of the process cells of 221-U and with 10. The canyon interior (including the process cells, hot pipe trench, and associated ventilation tunnel) and the rail tunnel interior are considered contaminated. The galleries are considered to be uncontaminated except for some areas of the southeast wall that would require fixative application. Final Feasibility Studyjorthe Canyon Disposition Initiative (221-U Facility) )uno 2003 11-3
(00^1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 fOb^121 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 ^43 44 Appendix H- Detailed Description of Alternative 6: DoEIRI.-2oo1-11 I Close in Place - Collapsed Structure Rev. 10.rafso Red litt S t 'kenu! the degree of equipment volume reduction that is achievable, it is assumed that only this contaminated equipment would be disposed in the 221-U cells. It is further assumed that there may be equipment placement in cel13. which connect.c to the rail tunnel. (-1-^j.L`The existing 0.6-m (24-in.)-diamcter cell drain header located beneath 221-U would be grouted to immobilize contamination in this pipe. ^48:J^LA new ventilation system with replaceable high-efficiency particulate air (HEPA) filter banks would be installed on the northeast end of the 221-U roof. It would replace the existing ventilation tunnel and stack ventilation system. 49:I7Intemal void spaces essceiat . inside of 221-U would be filled with grout and pressure grouted. Where large voids are grouted (such as oFeund the vaige eentainers in the allgeries and inside the cells), a low-cement-content grout would be used. This grout has a limited potential for heat buildup due to a low heat of hydration yet would provide sufficient compressive strength for the intended service. ^20:J$.While sources for some materials required for construction of an environmental cap have not yet been identified, it is assumed that sufficient quantities of materials necessary for the clean fill and construction of the environmental cap are available locally. 24-.12.A modified Resource Conservation and Recovery Act of 1976 (RCRA) Subtitle C engineered barrier would be placed over the 221-U Building and wherever demolished building sections are placed outside of the footprint of 221-U. No liner would be placed under the building wastes placed to the northwest of 221-U. The building sections (roof and canyon wall sections) are not considered RCRA-type wastes and would be located under the engineered barrier. H.1 PREPARE EXISTING COMPLEX This function provides for.the necessary programs, administrative and physical controls, safeguards, and infrastructure to prepare the complex for subsequent operating and closing the complex functions. The purpose of these activities is to establish a complex-wide configuration designed to support wastepreeessing;decontamination, demolition, and closure. 11.1.1 Control Hazards Preparing for Alternative 6 would include controlling hazards at the site. This control would begin with preparation of a decommissioning plan. The plan would include, but not be limited to, such things as readiness evaluations, hazard classifications, waste designation, a waste Final Feasibility Srudyfor the Canyon Disposition Initiative (221•I! Facility) ]u x 2tlnl H-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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(^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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1 ' ^ ^ DOEJRL-2001-1 t Rev.H1 nraf
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Appendix D- Slope Stability Analysi
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Appendix D - Slope Stability Analys
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(^N Appendix D- Slope Stability Ana
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• Appendix D-Slope Stability Anal
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^• r^, r^ 2 3 4 5 6 7 Appendix D-
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^ Appendix D-- Slope Stability Anal
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t^` ^ ^ 1 2 DOFJRL-2001-11 Rev. JDr
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Appendix E - Detailed Description o
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Appendix E- Detaiied Description of
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t^' Appendix E -Detailed Descriptio
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f,^N Appendix E - Detailed Descript
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Appendix F - Detailed Description o
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Appendix F -Detailed Description of
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Appendix T- Detailed Description of
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Appendix F -Detailed Description of
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(O^N Appendix F - Detailed Descript
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Appendix E- Detailed Description of
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..^•. , Appendix F- Detailed Desc
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(^N f ` Appendix F - Detailed Descr
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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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