B513 Planning Meeting, 11^th October 2001

Present: Tony Cass, Anne Funken, Jukka Lindroos, Denis Raffourt, Dave Underhill, Mario Vergari, Tim Whibley

1. Previous Minutes

• Quotes have been received for removing the original air-conditioning unit (FF22K) and for removing the ducting (13KCHF). We still await a quote for removing the newer air conditioning unit, but this is expected to cost some FF10K.
• Jukka also proposes to remove the steam humidifiers in S-415 in order to make space for the electrical control panel. This would cost a further FF30K. Tony agreed that his should be done but suggested that the new technical area to be created adjacent to S-413 and S-414 be considered as a possible location for the control panel.
• Jukka confirmed that it will be possible to knock down the walls separating S-406 from S-034 and to construct a wall creating the new technical area all without moving the airconditioning unit for the UPS battery room.

· Anne is still waiting for a quote for the removal of the additional electrical supply equipment (e.g. old-style normabarres on the ceiling.)

• It will be necessary to replace the existing lighting. Alain Burdairon has proposed a “normabarre style” system that would allow light fittings to be located as a function of need (both light intensity and clearance). Anne will follow this up within ST and arrange a cost estimate.
• Anne asked about the requirements for cable tray installation in the false floor. Tony will schedule discussion of this issue with Marc Collignon at the next meeting.
• Denis Raffourt agreed that the existing smoke detection should be removed as part of the room clean-out and before the new system is installed. This removal has been costed at 2500CHF. Temporary smoke detection units are available for use during the reconstruction work before the new systems are commissioned. Denis will reserve these units for use in the vault for the first few months of 2002. Costings for the future smoke detection systems should be available in week 43.

· Two 120kW heating coils would be required to pre-heat air from -12°C to +5°C. In principle these should be connected to the secured power supply but this may be problematic as a maximum supply of 1MW is available. Connection to the normal supply is likely to be acceptable as a conjunction of a fire in the vault during winter and a general site-wide power cut is unlikely. However, Anne still had concerns about providing an additional 240kW of capacity on the general services network. Anne and Jukka will further discuss the electrical supply possibilities for these pre-heating coils.

• It is accepted that the room will be divided into three zones for air-conditioning/smoke-separation purposes. Anne and Jukka will produce a draft plan indicating the layout of the air-conditioning units, PDUs, normabarres and smoke curtains such that we can review the interference between the air-conditioning and electrical supply zones. Anne commented that she had limited freedom to choose the PDU capacity as these must be matched to the free feeders in the substation.
• A water detection system will be included in technical specification for the vault air conditioning system.

2. Cost profile

• Anne mentioned that it will not be possible, as expected, to arrange for the civil engineering work in the vault to be carried on an existing contract as there is insufficient financial authorisation. Further, it will not be possible to arrange for work to be carried out on the follow on contract before June 2002. Therefore, ST will issue an accelerated request for quotation covering the work in the vault alone. It is still expected that the work can commence at the beginning of January. Mario requested that full consideration be given to the use of 61cmх61cm tiles for compatability with the existing machine room.

· Anne corrected the suggestion in the minutes of the September 27^th meeting that the normabarres can be prepurchased. Electrical hardware (e.g. normabarres) and installation work must be ordered as a single package.

• Jukka has made initial enquiries into the requirements for an additional chiller in S-415. These indicate that installation should be rather simple—the necessary connections already exist in the pipework—and that the installation could be completed during 2002 if desired.

3. Vault conversion issues

• Jukka asked if a door could be provided between the new technical area adjacent to S-413/S-414 and the machine room area. Tony was not keen to provide this but understood the advantages for people working on the air conditioning system.
• Anne stated that the modifications to S-401 and the door between S-411/S-412 indicated on Nigel Baddams’ latest vault plan (indice B) should be considered as a future project. The work cannot be carried out whilst the current UPS is in active service.
• Denis remarked that the general B513 smoke detection system must be extended to cope with the proposed new layout of the S-030 area.

4. AOB

• Anne’s investigations have shown that is will not be possible to suppress the circuit breaker boxes attached to the shelving racks. Differential protection is required “above the false floor” and the relevant breakers need to be easily accessible rather than being located on each extension block. Tony commented that in this case we need to review that way in which the different breakers behave when power fails, this in order to ensure that services can be restarted remotely, promptly and in an orderly fashion. Anne will cost (in terms of both space and money) different options for the distribution of motorised circuit breakers.