B513 Planning Meeting, 7th August 2003

Present:           Tony Cass, Anne Funken, Francois Levrier, Jose Miranda Vizuete, Denis Raffourt, Tim Whibley

1.             Previous Minutes

  1. 3.4) Order for work sent out on 2nd August. Will not be in place for 15th August, but work plan for civil engineering foresees work outside. Detailed workplan will be established after 11th August, will set deadline for work on UPS hvac.
  2. If dedicated chiller is installed for B31, chiller should go on roof of B31 to avoid noise (c.f. B186 chiller).

2.             Bunker Status

  1. Preparations for construction are proceeding slowly but reasonably on schedule. There will be a first réunion de chantier on Monday 11th but this mainly concerns Jose. A date will be set for the regular meetings.
  2. A Price Enquiry for the false floor is being prepared. This work is foreseen between late-November and early January so there is enough time available to select a company.

3.             Smoke detection for the substation

1.        Denis Raffourt has prepared an estimate for smoke detection systems for the complete substation (i.e. including the existing areas after reconversion). For the bunker, 3 detection systems have been costed

a.       detectors in front of the hvac unit air intake,

b.       ceiling detectors, mostly as backup in case of lack of ventilation, and

    1. detectors under the false floor.
  1. The need for the under floor detectors is not evident. Such detectors are not installed in substations elsewhere and, as experience in the vault has shown, smoke under the false floor is rapidly distributed around the room and detected at the hvac unit intakes. It was noted that this under floor system accounts for almost 50% of the total 65K cost.
  2. A final decision is not needed until summer 2004 as installation will not be before the end of next year. Although the contractor may have changed by then, no significant change in cost is to be expected.
  3. A new rack will be needed to accommodate the additional connections. Ideally this should be placed near to the substation to reduce cable lengths but this will depend on the space available. The rack placement can be reviewed after the civil engineering work for the bunker.

4.             Smoke detection for the machine room

  1. Denis Raffourt confirmed that there is just a single laser based detection system installed in the ceiling. Given that localised smoke detection will never be possible in the machine room, a backup detection system is strongly recommended. This could be installed at any point. An additional system was costed a few years ago; a revised estimate could be prepared easily.
  2. The future hvac arrangements for the room need to be understood before any changes to the underfloor detection systems are considered. As for the substation, it may be that an underfloor detection system is unnecessary if there is sufficient air flow to ensure that any smoke generated here would be detected rapidly at ceiling level.
  3. Denis Raffourt also emphasised that we should review the isolation of the machine room—there is still much mixing of air between the machine room and the rest of the building. Full isolation of the machine room is likely to be complicated as the barn is integrated with the machine room as far as air conditioning is concerned but with the rest of the building in terms of use.

5.             Electrical upgrade for the machine room

  1. Anne distributed an updated plan for the machine room. This incorporates modifications to increase the equipment area at the back of the room and also integrates the location of the structured cabling outlets.
  2. Initial indications are that we have suffficient normabarre modules and that the installation work, including the costs of cable trays, would amount to about 140KCHF. A choice needs to be made concerning the type of normabarre connectors to be ordered. It is possible to buy connectors which are equipped with three 16A sockets which may be more appropriate in some circumstances. This should be discussed further when Marcel Lasne returns.
  3. Even for critical PDUs, maintain principle that if power is lost, it does not return automatically.
  4. Anne will arrange for the user and office areas of B513 to be separated electrically from the machine room. This will cost about 14KCHF; a further 5KCHF will be needed for removal of the old PDUs in the machine room. We still need to know the UPS requirements for the B31 starpoint to make the appropriate arrangements for this.
  5. Andre Julliard will removed the old IBM pipework and relocate the sensors for the machine room air conditioning that are located in the right hand side of the room.
  6. Jose has a quote for 3kCHF to paint the wall next to barn and 3 bays along the rear wall. This painting needs to be coordinated witht the removal of the PDUs and the normabarre installation work as 3-5 columns of false floor tiles will need to be in place during the painting.
  7. Jose also has a quote for the installation of the plasterboard barrier under the false floor. This work should be done before the new PDUs are installed. Installation of the barrier should be arranged once the cable clearance is complete to minimise the places at which cables go through the barrier. Care must also be taken during thr work to minimise the dust generted in the machine room.
  8. Until the new substation is commissioned it will not be possible to fully power all of the PDUs (and hence normabarres). We will have to choose between powering all normabarres of 3 PDUs or some normabarres of each PDU.

6.             AOB

  1. Jose has been in contact with Steel Systems and apparently they can manufacture 610x610 tiles. This will be followed up once the requirements for perforated tiles and/or grills is known. Steel Systems would also quote for the replacement of worn parts of the false floor (e.g. the rubber join along the stringers supporting the tiles.
  2. Next meeting: 2pm, Thursday 28th August.