B-453 is an existing facility at LLNL that will be used for CORAL. The new machine will be sited in the east room of B-453. B-453 has approximately 47,500ft2 of 48” raised floor space and 30 MW of power. 20MW of this is budgeted for the CORAL system and associated file system. B-654 is another facility identified that may house a smaller CORAL system option as described in Section 3. This facility has approximately 6000 ft2 and 6MW of power.
The heat exchange for air cooling exceeds 2.6M CFM in B-453 and 200,000CFM in B-654 for ancillary components of the CORAL system. LLNL has a campus low conductivity water system, referred to as LCW, that is the preferred choice of heat exchange for CORAL.
The B-453 raised floor has a 250 lbs./ft2 loading with the ability to accommodate up to 500 lbs/ft2 through additional floor bracing. Rolling weights cannot exceed 2000 lbs./ft2. B-654 has a floor rating twice that of B-453. Both B-453 and B-654 are unique facilities in that their construction consists of single story two level computer rooms. This design affords the capability of siting a machine with higher weight capacities on the slab on grade of the first level of the computer room.
B-453 has the most restrictive path of travel to the second level of the machine room. The smallest door opening is 7’ 10” (W) x 7’ 10” (H). Both facilities have a freight elevator capacity of 10,000 lbs.
The CORAL system in B-453 will be installed and located inside a Limited Access Area in a Vault Type Room (VTR). Access to the room will only be provided to authorized personnel under escort. On-site personnel will be required to submit DOE P-clearable applications for access; applications must be approved prior to entry into this facility. Proposals should indicate if the on-site team has members that are other than U.S. citizens. Physical access to this computer facility by foreign nationals from sensitive countries is not allowed. These restrictions do not apply to B-654.
Head disk assemblies (HDAs) from disks used for classified processing cannot be taken off-site or returned to the factory.
Figure 2: CORAL siting locations within LLNL B453 computer floors
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