B513 Planning Meeting, 27^th August 2001

Present: Tony Cass, Anne Funken, Jukka Lindroos, Dick Minchin, Bruno Pichler, David Underhill, Mario Vergari, Tim Whibley

1. Vault conversion planning

• The main purpose of the meeting was to review the planning schedule for converting the vault to a machine room.
• Given the location of airconditioning and electrical equipment and the configuration of the walls and ceilings in S-407,408, 409 & 432 it is clear that the vault must be emptied of active equipment before the major reconfiguration work can start.
• Tapes (3480 and DLTs) should also be removed from the vault before work starts. Good progress is being made with identifying obsolete cartridges (and one shipment has already been sent for destruction). However, we will need to find archive space for around 100 palettes. A minimum of 100m³ of space is required for this (assuming space with a height of at least 3m), but more space is desirable.

· The DLT robot (Timberwolf) has to be moved by STK engineers; it is assumed that this will be done after the 3 new silos are installed in B613.

• One of the 3 PDP storage areas in the vault is being used as an IA64 test lab. The future of this lab needs to be agreed before Sverre Jarp leaves at the end of September.
• The CHF30K estimate for removing the old HVAC equipment seems excessive. Jukka will check this.

· The wall around S-406 is scheduled to be demolished, but a part of the equipment here is required for the UPS and battery room. Jukka will investigate ways to provide temporary air conditioning to these areas.

· Anne will provide a cost estimate for removing the old electrical distribution equipment.

• We need to agree the final plans for the following doors:

a. S-413/vault: suppress or (preferred) leave as access to new technical area

b. S-415/S-030 leave or (preferred) suppress. A clarification on the “fire exit” status of this door is required.

c. The height of the new emergency exit to be created between the vault and S-030 needs to be decided. For this, the height of the false floor must be agreed.

• More generally, the false floor layout must be agreed in order to finalise items such as the electrical and network layout. Also, provision must be made for approximately 100m² worth of holes to allow cold air up from under the false floor.
• Need to understand where the emergency power comes from for air conditioning units. From the UPS or just from the diesels. Implication if equipment is running and not the air conditioning. Implications here for size of critical UPS. Can't zone airconditioning easily.

· Anne said that the detailed timings for the LV supply work would only be known after a discussion with the contractor (which will take place in the next couple of weeks).It is not expected that this work will delay the completion of the vault conversion but it was noted that this work will be competing with other work across CERN during the accelerator shutdown period..

• We need to understanding the fire-rating of the vault walls to set the correct rating for the fire dampers. Additionally, we must know whether the smoke that would be produced in a fire is considered as hot or cold as this has implications for the insulation of the ducting.
• Jukka has still to determine how the fresh air ducting will be placed. In part, this depends on the height of the false floor. Jukka commented that it might not be necessary for this ducting to reach all the way to the Jura side of the vault.
• Do we need to preheat this fresh air? (It may have a temperature as low as –12C in winter; could aire at this temperature damage equipment?)

2. AOB

• Jukka has distributed a rather complete description of the HVAC planning in thefeasibility study that is required prior to the preparation of the tender. The report summarises well the discussions in previous planning meetings.
• Jukka drew attention again to the point that “free-cooling” will not be possible with the “in room” cooling units and thus one of the chillers will need to be kept running all year round.

• Anne is concerned that we are getting close to overloading the capacity of the UPS and diesels given the current rate at which we are adding load—including overhead load such as the air conditioning units for the vault. The maximum load that can be supported by the diesels is 1MW (1.2MVA); we must avoid a situation where the potential load is greater than this.

• The lighting arrangements in the vault should be reviewed—if any changes are needed, now would be the best time.
• Next meeting: 10am on Thursday 13^th September.