B513 Planning Meeting, 19th November 2002

Present:           Tony Cass, Anne Funken, Jose Miranda

1.             Previous Minutes

  1. Approved with minor corrections. Matters arising from the previous minutes are noted below.

2.             Substation

  1. Anne Funken has discussed 18kV cable routing with Guy Salomon. TIS have no objections to routing these cables in corridors provided that they are clearly identified. However, this issue is no longer relevant (see next point).
  2. Following further investigations, it is not considered possible to route all the necessary cables across the S-206 corridor at ceiling level. Anne and Nigel have therefore discussed the possibility of a caniveau running between the bunker and the existing technical gallery. Nigel considers that such a caniveau is feasible provided that it is located carefully with respect to the support pillars for B513.
  3. Some design issues (mostly concerning access) for the caniveau still need to be settled. However, the cost is not expected to exceed CHF10K. This is significantly cheaper than the quote of CHF40K for the cost of boring tubes between the bunker and the technical gallery.
  4. The question of emergency stop provision has also been discussed with Guy Salomon. The proposal to have independent local emergency stop systems in each machine room (and no general emergency stop elsewhere) is acceptable provided that a mechanism is provided for the pompiers to cut all electrical power to the building.
  5. One additional 18kV cell is required to ensure continued computer centre operations during tests of the EDF/EOS auto-transfer system. This can easily be accommodated in the planned 18kV room.
  6. Unfortunately, the size of the LV switchboards still unknown—these are non standard given our requirements on the cross-section of the neutral bus bars. The final size of the LV room cannot be decided without this information and a statement on whether or not the units can be placed back to back. The one point that is clear about the non-standard units is that the heat dissipation will be higher so Jukka will need to take into account the new figure (around 20kW) in the HVAC arrangements.
  7. Although the existing contract with a design study bureau has expired, the offers for the retendering were opened last week. As there is a clear winner it is agreed within ST that they can be contacted to work on the substation project before the new contract starts. Jose will follow this up within ST.
  8. As for the construction, Jose has confirmed that we can use the existing market survey provided that the bunker cost is below 750KCHF. However, there is again concern that a tendering process would introduce delays to the construction planning that would put at risk the commissioning of the new substation in early 2004. Anne will contact Jean-Luc Baldy to discuss the likely future arrangements for the blanket civil engineering contract, emphasising the impact on the substation project if a tendering process is required.
  9. As for the design studies, it was felt that we have enough information now to ask for an offer for the design studies. There is no need to wait for the exact size of the LV room as we can make these changes whilst the quote is being prepared. However, the size of the LV room must be known by the time we have an offer from the new design bureau. Anne will emphasise the importance of the timely provision of the switchboard sizing information to the relevant contract manager.
  10. It was agreed that Anne would ask Nigel to prepare bunker plans for the rooms as currently sized together with the caniveau running to the technical gallery. Jose has already started to collect together all the old plans for B513 as these will also be required by the design bureau.

3.             HVAC

  1. Anne has been studying the electrical supply arrangements for the HVAC equipment with ST/CV following the October 28th review. One conclusion is that the supply arrangements for the chillers should be rearranged to improve redundancy. Fortunately there is no impact on the bunker as any additional switchboards can be placed in the HVAC plant room.
  2. More problematically, the 4MW solution for HVAC would have to be completely different since the 2MW chillers need an electrical supply at 3.3kV, not 400V. The impact of this requirement on the bunker sizing is not at all clear. Nor is it clear whether or not we could migrate from the 2.5MW to the 4MW solution without impacting the computing services. More investigation is needed in these areas.

4.             AOB

  1. Next meeting: 2pm, Thursday 28th November.