View Document Here - Hanford Site
View Document Here - Hanford Site
View Document Here - Hanford Site
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Appendix E- Detailed Description of Alternative 3: Do1JR1:2o0t-t 1<br />
Entombment with Internal Waste Disposal Rev. e1_pmrL<br />
Rcdline/Strikcout<br />
I building demolition. The removal and disposal of legacy equipment to the process cells would<br />
2 be the most efficient means of achieving this objective. Moreover, while the process cells would<br />
3<br />
4<br />
provide a significant amount of isolation in 221-U as it is currently configured, after closure<br />
activities for Alternative 3, all parts of the 221-U Facility containing waste fill, regardless of the<br />
5<br />
6<br />
7<br />
class of waste within, would be equally protected (contained) by an engineered barrier.<br />
Therefore, from the standpoint of long-term protectiveness, there is no advantage in reserving the<br />
process cells exclusively for Class C waste. However, cell 3 could have room for placement of<br />
8<br />
9<br />
waste-meterialswaste in addition to legacy waste from the canyon fleor ec c.<br />
10<br />
11<br />
F.11 Emplace Waste In 221-U Galleries<br />
12 Waste placement would start with container placement in the galleries. The waste would be in<br />
13 open-top cargo containers that would be placed on an individual steel frame with casters. Small<br />
14 rails would be installed on the gallery walls to guide the containers on a one-way trip into the<br />
15 galleries. Equipment and piping in the galleries that prevents container placement would be<br />
16 removed. After the waste containers are in place, each gallery would be grouted to provide<br />
17 support for the wastes and the environmental cap.<br />
1s<br />
19 Waste would be placed first in the lowest (electrical) gallery. In preparation, the south end wall<br />
-0<br />
.r \ 1<br />
22<br />
23<br />
24<br />
25<br />
of the gallery, located in the 276-U Solvent Recovery Facility, must be exposed. The concrete<br />
slab adjacent to the end wall would be cleared to allow vehicle access to the lowest gallery.<br />
A temporary structure would be erected so that containers could be prepared outside of the<br />
galleries. The concrete masonry unit block end wall must be removed and enlarged for waste<br />
container access. A new rollup door would be installed on this opening. The doorways from the<br />
271-U Office into the galleries could be left open to provide emergency egness, but would<br />
26 eventually be filled. A ventilation system for the galleries must remain functional during waste<br />
27<br />
28<br />
placement and grouting.<br />
29 F.2.1.1 F311 Electrical Gallery with Containerized Waste. Waste would arsive at the south<br />
30 end of the canyon by truck in cargo containers (see assumptions for description) and would be<br />
31 lifted onto dollies staged at the open gallery end. They would be pushed as far as possible into<br />
32<br />
33<br />
34<br />
35<br />
the gallery with an electric forklift and then secured in place to prevent movement during<br />
grouting. The total length of the electrical gallery is separated by the railroad tunnel in two<br />
segments. The main segment of the electrical gallery on the south side of the railroad tunnel is<br />
225 m (740 ft) in length. This gallery segment could hold approximately 37 containers.<br />
36 A spacing of 6 m (20 fi) on center for the 5-m ( 16-ft) containers was assumed to allow for dolly<br />
37 length and container placement.<br />
38<br />
39<br />
40<br />
41<br />
There is a short segment of the electrical gallery on the north side of the rail tunnel. This gallery<br />
segment is about 12 m(40 ft) long and could store, at most, one container. The best use of this<br />
space would be to place loose material that is too long or tall to be placed in a container.<br />
42 A possible use for this space would be disposal of material from demolition of the 276-U Solvent<br />
('13 Storage Facility. After waste placement, this short segment would be closed off with forms and<br />
44 grouted from the pipe gallery level.<br />
Final Feasibility Srwty for the Cartyvrr Disposlrioa lniriative (221 •U Faclfiry)<br />
lone'!0oJ F-16