B513 Planning Meeting, 9^th November 2001

Present: Nigel Baddams, Tony Cass, Marc Collignon, Anne Funken, Dick Minchin, Bruno Pichler, Mario Vergari

1. Previous Minutes

• We still await a quote for the removal of the newer HVAC unit. [Finally received on November 21^st: CHF4,860, including all associated equipment.]
• The cost for removing the additional electrical supply equipment amounts to 16KCHF. Tony felt this was unreasonable expensive given that we had been quoted 6KCHF for removing the switchboard and “ground level” distribution. Anne explained that the 16KCHF covered the removal of all the old lighting installation, not just the ceiling mounted normabarres. It was agreed that the exact details of the quote should be checked.
• The different possibilities form remote PDU control will be discussed at an ST meeting next week. The basic arrangement is to have a unit in each PDU to control each outgoing feeder and make measurements. To allow remote control from the TCR or the operators box, the control units in each PDU have to be connected to a single PLC in the substation. A PVSS interface could be considered later. The cost would be 10KCHF for the PLC in the substation plus 1KCHF per PDU for the control unit.

• Anne asked if there was any intention to connect the two power inputs provided on the STK silos to the different UPS level power sources. This is not planned as the silos are for physics use. However, we could consider connecting using two different normabarres.
• It will not be possible to test the inrush current for a rack of PCs before December as all systems are in production. However, further “steady state” measures can be made.
• Tony has still to discuss the need for pre-heating coils within IT division.
• Orders for fibres and associated equipment will be issued soon; Marc still needs to determine the exact lengths needed, including for the fibres between the vault and the computer centre as the routing is not yet decided. Here, Tony suggested it might be best to take the cables vertically into the barn and then across to the network area rather than across at the basement level and then up.
• Tony has had some preliminary discussions on reserving one area of the vault for silos, but further work is needed. Overall, the idea is not bad, but there are difficulties if we cannot have identical configurations in B513 and B613.

2. Order Status and Work Planning

• The technical specs for the civil engineering work have been prepared but have yet to be reviewed. Anne does not think that this work can begin before end-January; further, Charles Scalisi will not be back at CERN to supervise the work before February.
• The “heavy work”, demolition and construction of walls, should take around one month. On this basis, Tony’s planning suggests that the vault conversion will not be complete until early June 2002, rather than mid-April. It was noted that the details of the various separating walls in the former MG room depend on the size of the smoke extraction system, and so cannot be known before air conditioning tender is in. However, the vault conversion does not depend on this work.
• The HVAC tender should leave CERN in the week of November26^th with a closing date in mid-January. After the order is placed towards the end of January, the company will need two weeks to study the system in detail before ordering the various components. Delivery of the air conditioning units themselves would take around 6 weeks so these will not be here before the end of March.
• The delivery delays for the HVAC units should not be problematic given the civil engineering days, but this is not absolutely clear. Anne will be preparing a formal ST project plan to check these issues.

· The tender/order for the false floor will now be separate from that for the heavy construction work. Further investigations into the fixing arrangements for false floor feet show that

a. constructors guarantee the quality of fixation whether or not glue or bolts are used, and

b. the difference in the type of feet that are used means that a bolted structure costs three times more than a glued structure.

Given this last point, we should not insist on bolted feet. Tony commented that the fixation mechanism is less important now that we are pre-installing light cables rather than dragging around heavy IBM channel cables.

· Whatever the fixation mechanism, we have to take into account the floor rails for the old tape racks. Dick pointed out that these rails are prouder of floor in some areas as the floor slopes.

• Based on experience from B613, Nigel and Anne believe that the false floor installation should be done after the PDU and HVAC unit installation, but before normabarre and cable tray installation.
• Painting and cleaning (of the walls as well as the floor) need to be coordinated with the various installation tasks. These tasks should be costed and ordered now such that they can be done by the existing contract.
• Dick Minchin pointed out that we should make sure the floor is cleaned properly and that some form of shot-blasting will probably be needed to clean off various patches of glue and other residues of past work. This shot-blasting needs to be costed; the 2KCHF cost mentioned for the archive store was for an area one-sixth the size and the work was carried out a good few years ago.

3. Floor Plan Review

• Nigel showed a first coordination plan for the vault. Network information has still to be included; Marc will send the necessary information. At popular request the next plan will be on a 1:50 scale.
• Anne and Jukka have agreed the needs for perforated tiles. The air conditioning requires 10% of floor area to be space. Perforated tiles are 40% space and thus 25% of the tiles must be perforated to achieve the 10% figure. These tiles cannot support a permanent equipment load, but there is no problem wheeling equipment across the tiles during, e.g., installation.

• The false floor order will specify the requirement for 25% of perforated tiles. The exact placement will have to be agreed. For this to be done, the rack placement needs to be included on the coordination plan.

4. B513 Substation

• Anne and Nigel presented a very preliminary plan of a future substation housed in a bunker under the main car park.
• The preliminary plan houses the 200kW UPS in the bunker. This is unlikely to be necessary as this UPS (and associated batteries, even for 2 hour cover) can be accommodated in the existing low voltage switchgear area.
• Without the 200kW UPS, the bunker would be ~18m wide and extend ~9m out from B513. Although some size reduction could be achieved, this is probably not necessary as the bunker would fit on the Saleve side of the Barn door.
• The major construction problem is likely to be dealing with the air conditioning ducts that lead to vents on this side of the building. It is likely that the bunker will have to be pushed out further from the building to accommodate these ducts. However, there is sufficient space between the ducts to install doors with the height required for access.
• Anne has established that the existing transformers can be installed outside, although shelters will be required. These shelters would cost 4KCHF each, but this is substantially less than the cost of two new transformers.
• Anne and Nigel will be refining the substation and bunker plans over the next couple of weeks.

5. AOB

• There was some discussion of Emergency Stop requirements. It would be desirable to have independent Local Emergency Stops for both the vault and the machine room, but these can’t be installed now without much work that would become unnecessary with the new substation. It was noted that, in any case, both zones would still be affected by the general building emergency stop, for which many buttons are distributed across B513. The need for these buttons will be clarified with Guy Salomon.
• Anne has been discussing lightening protection with Raymond Cambarrat. Apparently the building has a lightning protection (paratonnere) system, but there is no information about this or if it is in a good condition or not. Also, if this does exist, then parafoudre equipment is required at the substation level. Anne would like to commission a study required to check on the current system and make recommendations. Tony agreed that this could go ahead, but asked that the study should give an indication of the level of risk—in terms of both frequency of occurrence and likely consequences.
• Marc will take care of the dismantling of the old structured cabling network.

• Next meeting: 14:00 on Friday 23^rd November.