SNS Central Lab & Office/Nanophase
Oak Ridge, TN
The Spallation Neutron Source (SNS) is an accelerator-based neutron source that is built on an 80-acre site adjacent to Oak Ridge National Laboratory in Oak Ridge, Tennessee. This one-of-a-kind facility provides the most intense pulsed neutron beams in the world for scientific research and industrial development.
Blaine Construction’s participation in the SNS project included the construction of nine projects over a six year period. These include the Front End Building/LINAC, the Ring Tunnel /HEBT/RTBT, the Target Building, Beam Lines 13 & 14, the Central Exhaust Facility, the CHL/RF Cryo Building, the Central Laboratory and Office Building and the Center of Nanophase Material Sciences.
The Ring Tunnel installation comprised of 1,900 LF radius cast-in-place concrete tunnel, foundations for 5’ thick foundations and walls for inactive beam dumps. Also included was the 5’ thick basement foundation for the Injection Dump. Also included was the 20’ x 20’ Injection Dump Beam Vault which was lined with .750” carbon steel plate and a stainless lined tank vault.
The Target Building included installation of some of the most sophisticated equipment in the world. The building had to be closed in to allow for all trades to work prior to the equipment erection. A removable rolling roof section was designed to allow for the area of the Target to be accessed while maintaining building enclosure. This required that all lifting be in the blind and by radio communication. Blaine performed over 1,000 lifts in excess of 20,000 lbs, 100 lifts in excess of 50,000 lbs and 50 lifts in excess of 100,000 lbs. This was without a single incident. Heavy weight concrete was utilized in the Target monolith and hot cell walls up to 14’ thick and elevated slabs to 5’ thick. The aggregate for this concrete is barged from Brazil, and batched at a cost of $690.00 per cuyd. Due to the weight, 260 lbs per cuft, only four yards can be hauled by a ready mix truck. Extensive form work was required to support the concrete placements. Within the same walls, imbeds weighing as much as 80,000 lbs had to be held within .0001 inch. Grouting was accomplished on most of the equipment utilizing a grout that contained ground up engine blocks as an aggregate, weighed 290 lbs per cuft and at the cost of $1,600 per cuyd.
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