B513 Planning Meeting, 19th November
2002
Present:
Tony Cass, Anne Funken, Jose
Miranda
1.
Previous Minutes
- Approved with minor corrections. Matters arising from the
previous minutes are noted below.
2.
Substation
- 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).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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
- 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.
- 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
- Next meeting: 2pm,
Thursday 28th November.