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Appendix E - Detailed Description of Alternative 1: Do&R[.-2001-11 I Full Removal and Disposal Rev. 61 Draft ^ Redline/Strikeout I Removing the roof panel above the end wall, with the end wall in place, could damage the plain 2 concrete, with the risk of collapsing it. The southwest end wall would be dealt with similarly, 3 anytime prior to removal of the adjacent roof panel. 4 5 Wire saws would be used to cut the roof panels from their connection to the walls. The roof 6 panels would be removed from the building as a full (12-m [40-ftl) section. Wire saws would be 7 used on the panel once on the ground to size reduce the panel to an acceptable size for hauling to 8 ERDF. 9 10 Demolition activities would make extensive use of large-capacity cranes for building section 11 removal as each section is cut free by the diamond wire sawing process. Scaffolding would be 12 needed on both sides of each building segment to support the cable-cutting machines. 13 14 Steel beams would be attached lengthwise, on each side of the building, inward from the roof 15 edge, to distribute the lifting forces for the roof slab removal. Bearing plates would probably be 16 required on the bottom of the roof, inside of the canyon, to distribute the lifting forces to the 17 concrete slab. As the cut progresses, wedges or clamps must be placed in the cut to provide 18 vertical support and lateral stability for all concrete sections as cutting continues. 19 20 1 E.2.73 Remove Canyon Walls to Canvon deck Level. Wire saws .I would be used to cut the wall sections into blocks and the cranes would remove these blocks. A 22 step-by-step approach was evaluated for this removal. The following list provides the 23 approximate order of removal for concrete sections in each building segment: 24 25 • Roof panel as a single section for size reduction on the ground 26 • Bridge cranes 27 • Upper gallery (crane) wall 28 • Upper crane shield wall 29 • Crane gallery floor 30 • Rear (southwest) outside wall (pipe trench side) 31 • Crane gallery floor 32 • Operating gallery outer wall 33 • Operating gallery shield wall 34 • Operating gallery floor 35 • Pipe gallery floor 36 • Outer wall for pipe and electrical gallcries 37 . Cell cover blocks 38 • Cell end walls 39 • Celi dividing walls 40 • Lower gallery shield wall 41 • Pipe trench floor ^42 • Inner pipe trench wall 43 • Exterior pipe trench wall Flnal Fearlbillty Slady for die Canyon Pirpmirion Iniiiarive (221-U Facility) June 1003 E-13
f,^N Appendix E - Detailed Description of Alternative 1: DoFJRL-2001-11 I Full Removal and Disposal Rev. o t DtaU Redlinc rikeout 1 • Foundation mat 2 • Cell drain header. 3 4 The demolition steps would be even more extensive adjacent to the rail tunnel, adjacent to 5 cell 10, and at each end of the building. 6 7 E.2.1.4 Excavate Outside Building to Foundation Level. After demolition would have 8 reached the anyon dcck , the area on each side of 221-U would be 9 excavated to the foundation level. This would allow continuation of demolition of the building. 10 Clean material removed during this excavation would be stockpiled for later use as site backfill. S 1 Contaminated soil, if encountered, would be taken to ERDF for disposal. 12 13 E.11.5 Demolish 221-U from Canyon to Foundation Level. Building segments above the 14 foundation mat could be dismantled from both ends, meeting at cells 9 and 10, which would be 15 demolished last. This would Icave the process cells covered to minimize water intrusion and 16 leave the cell drain header collection tank in cell 10 functional for as long as possible. 17 18 The foundation mat varies in thickness from 1.8 to 2.4 m (6 to 8 ft). It would be left in place 19 until the walls of the canyon were completely removed to provide a firm working surface, and to 20 avoid disturbing the cell drain header. The foundation slab would be cracked using expansive ^21 grout. Wire saws would be used to cut slab reinforcement prior to demolition. 22 23 After removal of the foundation mat, the only remaining structure would be the bottom of 24 cell 10, the termination of the cell drain header. The cell walls extend approximately 6 m(20 ft) 25 below the bottom of the foundation. The walls would be exposed, cut, and removed. The cell 26 floor slab would be removed similar to the foundation mat. 27 28 E.2.1.6 Excavate Soil Below 221-U. As part of the demolition of 221-U, the first 0.9 m (3 ft) of 29 soil below the foundation slab would be removed. This removal step would include demolition 30 of the cell drain header. This 0.6-m (2-ft)-diameter clay pipeline is encased in concrete. The 31 pipe would be grouted solid to contain contamination and then removed in blocks for disposal at 32 ERDF. 33 34 E.2.1.7 Demolition of External ['iping Around 221-U. Piping not already addressed in the 35 preparation of the complex step would be removed as part of the demolition steps for 221-U. In 36 addition to the miscellaneous piping to be removed, a portion of the exhaust air tunnel would be 37 removed. This tunnel is a reinforced structure connecting the canyon's air ventilation tunnel to 38 the stack and filter. The tunnel is approximately 60 m(200 ft) long and runs from the end of the 39 air tunnel in building section 3 to the fans. Approximately 23 m(75 ft) of the tunnel would be 40 demolished and removed as part of Alternative 1. 41 42 The ventilation stack is about 60 m (200 ft) from the back wall of the canyon and would not be (0^'43 demolished in this option. 44 45 Final Feasibility Sradyjor the Canyon DkpoXtion Initiative (221 •U Facility) ^ ltmc:^ E-14
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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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Page 29 and 30: noFIRL-2001-11 Rev. p 1 1)raft P ^
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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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1 ^ (^N ^ DoFJRL-M-t t ^ Rev. I Dnf
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Appendix G -Detailed Description of
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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 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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,.r.. . Appendix H - Detailed Descr
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(^\ Appendix H - Detailed Descripti
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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 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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^ ("` ^ 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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