1. Previous Minutes

2.1) The price enquiry for the false floor closes on October 7^th with the opening scheduled for October 15^th. Jose emphasised the need for Anne to prepare the layout.
2.4) The report on the disk server load characteristics is still in preparation.
3.2) The existing PDUs are now scheduled for removal as from September 22^nd. There is a minor problem with one PDU as it supplies the B31 starpoint. Alternative arrangements for supplying the starpoint are planned but have not been scheduled as yet.
3.2) There is no need to plan future cable routes into the barn. However, much work is needed to tidy up the cables passing into the fibre room before the plasterblock separation can be installed along the Salève side wall.
3.3) Following discussions with Marcel Lasne, it has been agreed that there is no need to pre-order connections for the machine room. Some 20 connectors each with three 10A sockets will be ordered for disk servers in the vault.

2. Substation Status

Substation construction continues to make good progress and, with the base now concreted, we are less exposed to bad weather. A number of additional work items have been identified (cutting the B513 cladding, modifications as the B513 semelle is not as on the original plans), but there are no critical issues so far.
Anne has arranged a meeting with a filter manufacturer to gather more technical details.

The basic normabarre installation plan has been agreed, including the layout at the back of the room. The only question remaining is the exact placement of the 18m normabarres which will be discussed with Marcel Lasne. This will have some impact on the underfloor lights as these will be attached to the supports for the 18m normabarres.
It was agreed to place the switch for the under floor lighting in the operators area with other electrical control equipment.
Tim Whibley will arrange the re-installation of three rows of false floor tiles as requested for the people installing the plasterboard.
Steel Systems have provided a sample of a false floor grille with greater cross section for air flow than the perforated tiles used in the vault. Although the tiles are more expensive individually, fewer tiles should be needed overall, leading to a cost saving. More information is needed on the total cross section required for air flow to determine the number of tiles required. We also need to understand the maximum weight loading for these grilles.
Jose agreed to arrange for the covering of the top of the holes through the floor to the vault as was done during the vault conversion.

Given the amount of equipment likely to arrive in the coming years and the delay in substation commissioning, there is a potential problem for the overall electricity supply. The limiting factor at present is the 1.2MVA that can be supplied by the diesels as 600kVA is used for building services leaving at most 600kVA for computing equipment. Anne considered that it should be possible to remove the diesel backup for the computer centre temporarily, leaving only the autotransfer system as protection against main supply failure. Should this be possible we would have up to 1.4MVA available for computing equipment.
Assuming the diesel limit is removed, the UPS system can support a load of up to 1.2MVA but with no redundancy. However, redundancy could be restored by purchasing batteries for the currently unused 4^th module.
It was agreed to plan further steps once the practicality of removing diesel backup from the centre was understood.