B513 Planning Meeting, 24th April 2003
Present:
Tony Cass, Anne Funken, Jose
Miranda-Vizuete, Bruno Pichler
1.
Previous Minutes
- [2.7] The accelerator shutdown starts in
November, not September.
2.
Substation Planning
- Two changes to the bunker layout were
requested during the approval process.
- TIS would like an
extra door in the LV room to ensure adequate emergency exit provision.
- 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.
- 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.
- 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.
- 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.
- 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
- 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
- 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.
- Next Meeting: 14:00,
Tuesday 6th May to discuss the Machine Room upgrade.