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Appendix 11 - Detailed Description of Alternative 6: Do>:JRL-2001-1t Close in Place - Collapsed Structure Rev.1e ntatt B R ^icilin •4/Sirj{,ctxit 1 2 3 gallefy-wtwld-be-re,-. o..-•l:-;e-4 emparat^ eeveF-end-rellup^leer used foF the lewerlevel gallery 4 would be Feleealed. 5 6 H.2.1.2 Grout Pipe Gallery. The pipe gallery would be grouted in the same manner as the 7 1 electrical gallery. Greut•wetdd-be-pleeed-inside-the-eentainers-e.44hey-er 9 10 11 H.2.2 Demolition of 221-U Building 12 13 Conventional methods and technologies, such as wrecking balls and shears, are not suited for 14 demolishing this concrete structure and are not effective when wall or floor thickness exceeds 15 0.9 m ( 1 ft). The 221-U Facility contains structural components that typically exceed 1.5 m in 16 thickness. The recommended demolition method would be to cut the building into sections using 17 diamond wire saws. Large elevated pieces (such as roof panels) that would be hazardous to 18 demolish in place due to their elevation would be removed intact and set on the ground. 19 Elevated wall pieces would be cut into large sections that would be placed either on top of the 20 1 roof slabs or on the canvon deck . The end walls of the canyon would be i^'.1 demolished by wire sawing It into blocks. 22 23 The diamond wire cutting technique uses a small quantity of water to cool and lubricate the wire. 24 The wastewater would be captured and, if needed, removed from the site for treatment. Adjacent 25 roof panels are keyed with a stair-step joint similar to the cover block edges, making it feasible to 26 cut the canyon into pieces that are about 12 m(40 ft) long. 27 28 13.2.2.1 Mobilize and Erect Cranes. Cranes necessary for removal of roof panels would be 29 brought to the site and erected. These cranes would be used to remove building sections as they 30 are cut by the diamond wire saws. 31 32 H.2.2.2 Retnove End Walls and Roof Sections. Removal would start with the end wall at the 33 building's north end. The end walls are unreinforced. The northeast end wall should be 34 removed first because the roof removal would begin at that end of 221-U. Removing the roof 35 panel above the end wall, with the end wall in place, could damage this unreinforced concrete, 36 with the risk of collapsing it. The end walls would be wire sawed into blocks and lifted to the 37 ground level. Wall demolition debris would be placed with other building sections. The end 38 walls would not be required for the structural stability of the canyon during the Alternative 6 39 activities. The end wall at the southwest end of 221-U would be dealt with similarly, any time 40 prior to removal of the adjacent roof panel. 41 42 Wire saws would be used to cut the roof panels from their connection to the walls. The roof (ON3 panels would be removed from the building as a full (12-m [40-ft]) section. lrfting the roof 44 panel in one piece would be safer than supporting the roof and walls and breaking the elevated 45 slab into pieces. The ground must be shaped to fit the underside of the roof to eliminate voids Final FeasibiUry Study for drc Canyon Dispoittion biltiative (221-U Faciliry) ^ lune2003 1-1-17
Appendix It - Detailed Description of Alternative 6: DOFJRL-2001-I1 Close in Place - Collapsed Sttucltire Rev. jA-Drafi [3 ^ g^ii,e)^ttl^Ftln 1 when the stab is lowered. No further demolition would be done on the roof panels after they are 2 placed on the ground. 3 4 Demolition activities would make extensive use of large-capacity cranes for building section 5 removal as each section is cut free by the diamond wire sawing process. Scaffolding would be 6 needed on both sides of each building segmcnt to support the cable-cutting machines. 7 Steel beams would be attached lengthwise, on each side of the building, inward from the roof 8 edge, to distribute the lifting forces for the roof slab removal. Bearing plates would probably be 9 required on the bottom of the roof, inside of the canyon, to distribute the lifting forces to the 10 concrete slab. As the cut progresses, wedges or clamps would need to be placed in the cut to 11 provide vertical support and lateral stability for all concrete sections as cutting continues. 12 13 H.2.23 Remove Canyon Walls to Canyon Canvon deck Level. Wire saws 14 would be used to cut the wall sections into blocks, and the cranes would remove these blocks. 15 The wall on the south side of the canyon would be removed down to the canyon operating level. 16 Wall sections would be placed on the canyon deck. On the north side of the building, the 17 craneway and majority of the operating gallery would be removed. Approximately half the 18 shield wall height would be left in place to reduce demolition costs. This section of the wall 19 would be approximately the same height as wall sections placed on the canyon fieer dgji and 20 therefore would not increase the height of the environmental cap. Prior to demolition of the 21 operating gallery, all piping (including any hazardous materials such as asbestos insulation) 22 inside the gallery would be removed and disposed at ERDF. 23 24 As part of this demolition, the canyon bridge cranes would be demolished. They would be 25 drained of oil and could either be placed on the canyon deck or size reduced and placed in cell 3. 26 27 28 H3 CLOSE THE COMPLEX 29 30 This function would consist of constructing the environmental cap over the building and 31 demolition debris. It would also involve restoring the excavated and disturbed sites (including 32 laydown and equipment staging areas) to a grade consistent with the natural surface topography. 33 Closure of the complex for Alternative 6 would also require institutional controls and 34 maintenance of a monitoring system. Institutional controls could consist of both physical and 35 legal barriers to prevent access to contaminants. A closeout report would be prepared for 36 regulatory agency approval. 37 Final FeasibiliryStudyJbr the Canyon Disposition lnitiative (221-U Facility) uo ') 1 H-18
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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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fO'^, ^ 1 2 3 4 5 6 7 8 9 10 11 12
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I f^ ^ DOE!RL-2001-29 Ikaft D Redli
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^ ^ ^ 1 1 119 12 13 14 15 19 17 1 I
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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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^ (00h^' ^ 2 DOFIRI^2001-I I Rev. J
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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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(0^s 1,^N Appendix E - Detailed Des
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i^ r^'. ^ 1 2 DOFJRL-2001-11 Rev. 8
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^ ^ t^ 2 DOEIRL-2001-11 Rev. H Ihaf
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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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(^, Appendix F - Detailed Descripti
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(^N f ` Appendix F - Detailed Descr
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Appendix F-Detailerl Description of
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^`} Appendix F - Detailed Descripti
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^ (10^' (^N DOF/RL-2001-11 Rev. AjD
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^N r^ 1 n DOF/RLr2061-1 l ' Rev. I
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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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Page 167 and 168: t^N (M"N Final Feasibifity Stady ja
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Page 173 and 174: ,.r.. . Appendix H - Detailed Descr
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