B513 Planning Meeting, 24th April 2003

Present:           Tony Cass, Anne Funken, Jose Miranda-Vizuete, Bruno Pichler

1.             Previous Minutes

  1. [2.7] The accelerator shutdown starts in November, not September.

2.             Substation Planning

  1. Two changes to the bunker layout were requested during the approval process.
    1. TIS would like an extra door in the LV room to ensure adequate emergency exit provision.
    2. The electrical exploitation team would like the safe room to be 1m longer. This is possible—the 18kV room can be moved 1m towards B31, shrinking the LV room by 1m—but there are some consequences in terms of the layout of the 18kV room and the location of air conditioning ductwork. The most significant change is that there can no longer be a door between the 18kV and LV rooms. However, this door is not required for operation or maintenance, nor is it required by TIS.
  2. The requested modifications were considered acceptable. Indeed, there is even an advantage to increasing the size of the safe room as this enables us to support the use of 3 MVA transformers for the general services—which can can be done without increasing overall costs. The openings in the dalle for transformer cables will all be made a standard size; special provision will be made to protect the opening under the single remaining 2 MVA transformer against water infiltration.
  3. Jose will send the comments to the design bureau and expects the plans to be returned some time in the next week. This has no impact on our planned schedule—detailed plans are not required for the ST review on April 30th, and the new plans will be available in time to be sent out with the invitation to the Specification Meeting, still scheduled for May 9th. The commercial documents are being prepared by Micala Jackson and will be ready for April 30th. The one outstanding issue is to select an external reviewer for the specification meeting. Jose will discuss this within ST.
  4. Tony will contact Jean-Luc Baldy and Alan Norton to schedule a discussion of the bunker at the forthcoming Site Committee. Nigel has not had time to prepare the 3D images yet, but these should be available by May 6th.
  5. We need to be sure that all the necessary preparations can be done in the corridor, particularly the ventilation ducting. There will probably be discussion with contractor once the winning bid known in order to review the work site, but most of the required work is already understood. Following the events of the 22nd, we will need to be sure of all the possible side effects.

3.             Machine Room Upgrade

  1. Measurements of electrical demand idling, with a test load and at power on have been made for a double rack of the new Pentium Xeon based CPU servers (88 systems). Unfortunately, as a result of the power cut, it was not possible to test the load running a normal LSF job mix. The tests showed that the consumption per PC is about 120W idling and 200W at full load. The inrush current is about 20% above the full load level and would not present a problem if we turned a full set of 4 racks (166 systems) attached to one normabarre. One interesting point is the very low level of 3rd harmonics generated by these systems—they are equipped with power factor correcting power supplies. We need to understand if these power supplies can be demanded systematically in future acquisitions.

4.             AOB

  1. An order for the 18kV cells is being prepared and one for the protections will follow. Tony will check the IT planning and equipment ordering schedule.
  2. Next Meeting: 14:00, Tuesday 6th May to discuss the Machine Room upgrade.