Minutes SR meeting 30/4/03

Minutes SR meeting 30/4/03 & Status of SR1 Building

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Cooling system for SR1
Status of SR1/ Followup on Actions

Present Actions:

Cooling system for SR1

The evaporative cooling system was discussed for SR1 . Information for the TRT monophase will be collected by Mar and discussed at a later time.

A technical design for the evaporative cooling plant (cold and warm) is ready (by Pierre/Marek based on Vic's concept). Open questions a summarized below.

Pierre & Marek will circulate the technical design when updated.

1.) Cold system (C3F8)

It is not decided which compressor for the cold C3F8 system will be used. A new compressor type has some promising advantages (in particlar for the later final system): cheaper, smaller, more capacity.
Pierre will try to get this compressor for tests in the next 2 weeks and then test it until end June. If it is found to be ok, it will be used right away for the SR1 evap. cooling system.
If it is not usable we will proceed with the "old" compressor type (3mo delivery time ARO)

2.) Warm system

Based on recent information , it will be very expensive (impossible?) to get C4F10 at CERN.
Pierre/Migel will look into using other coolant for the warm system (C5F12, etc...). The choice of the coolant will most likely not change the layout/components in the warm system.

It was decided that the warm and cold system have to be usable independently,i.e. run one test setup warm while another runs cold. (ie. double piping along main distribution up to mainfold on the wall.

Marco propose to have only one system based on C3F8 and run it at higher pressure for a warm operation (7 bar?). Advantages are only one system instead of 2, no switch over of collants in the detector required.
Marco will check with SCT/PIX project engineers the feasibility of this proposal

3.) Manifolds/Pressure regulators

The manifolds in the assembly area (8 circuits PIX, 5 circuits SCT) are planned as manuel values (check safety).
The 44 circuits in the assembly area need to be discussed. Options are : manual values, pneumatic values, electrical values for pressure regulation (Steinar/Marco/Heinz with Pierre/Marek). Issues to address are: control system complexity, safety of operation, costs. This will be followed up next week.

All values need to be warm.

All circuits are now 1 inlet on 1 outlet. The split into different inlet capilaries (2 on 1 SCT barrel, 1/2/3 on 1 SCT fwd) will be done on the detector level!

Heinz will check for work shop possbilities for the manifold construction.

4.) Other

The barak for the cooling plant in the back of SR1 will be constructed once the plane dimensions and installation requirements are clear.

The location for the control rack needs to be defined.

During installation the SR1 door close to the plant can be used.

Dummy loads: we will get the dummy load, which is currently in Oxford back during the summer for testing. BUT this dummy load is too small for a full compressor tests, so we will require additional dummy load(s).

5.) Time scale

Marek/Pierre will now prepare an inventory list of all items so that we can proceed with the orders for all undisputed items.
An approximate time scale is

make inventory list : now - mid May
check for warm C3F8 system / replacement of C4F10: now - mid May
order/delivery of first plant components: mid May-end June
test new compressor: now to end June
assembly of cooling plant : beg July to end Aug
start commissioning/testing in lab : Sep.
pipework in SR1: Aug-Sept
construction of manifold: July-Sept.

open issues:

control of pressure regulators
cooling DCS to be defined when regulation is clear

2.) Status of SR1 - followup on actions

1.) Electricity installation

finished

2.) Network installation
finished

3.) Phone lines

3 lines installed, 4th (next to laser room) remains

4.) UPS

UPS are installed and connected to main electricity.
Siemens will come on 7/8 May for maintanence checks and verify the UPS operation of both UPSs. They are planned to be operational by 15/5

5.) Dry air/ Compressed air

Quotes of piping received and ordered. Side visit with installation company was done on Tuesday. Piping will be stainless steel pipes mounted next to cable trays in clean room. Installation will start approx. 20/5 (to be confirmed). This will provide clean compressed air with a dew point of -10C at different places.

Additional air dryers (for dew point of -40 to -45C) will be installed directly at point of use. Noise tests on those dryers are currently being done on one of them which is available in Bat 161.

6.) Cable trays

Order was received by company. Installation is planned to start on 12/5. It will take about 2 weeks in the clean room + 1 wk in rack area. First step of installation is the installation of the cable tray support beams every 3m in the clean room. These are all trays in SR1 except trays from TA wall to service support on TA platform.

7.) Service support for test cables in TA

It was decided to proceed with the drawings for a "table-like" service support structure on the platform in the test area. We plan to span the full width of the platform in order to have maximum flexibility for tests/integration work in this area.

At structure is expected to be about 6.2m wide, 4m long (to allow side-ways insertion/extraction of the ID trolley) and approximately 3.8m high. The clean volume is approximately 3.6m (length) x 5.8m (width) x 3.2m (height). Richard will proceed with the drawings for this structure. Manpower is most likely available for its contruction by mid May.
Sequence:

confirm dimensions (when drawing is ready)
sign off by TIS for statics/safety
order of material (beams)

A sketch of the support to illustrate its layout is below (The shown platform corresponds to the dimensions of the TA platform):

8.) Emergency smoke extraction

finished. Official reception is on 11/5

9.) DCS

The prepareparation of the CIC DCS progresses well. The necessary hardware has been order. The distribution and cabling is described below (Fernando)

SR_CANbus_layout

The first version of the SCT power supply DCS has been installed in Oxford before easter (Ewa,Heidi,Pamela). Oxford has now one full SCT PS crate available for tests. The DCS work on SCT PS continues now at Bat 161. A first test version for the PS DCS (1 crate controlled through the final crate controller, OPC, PVSS insterface) is expected to be ready by mid May.

10.) Space allocation

Below is a _proposed_ space allocation for

SCT/TRT system tests
ITT for PIX integration tests

The ITT tests require a space of 12 x 3 m and it is proposed to use the lower part of the SCT area in order to keep the central moving corridor clear. The space is required end this year, early next year. Eric will confirm if this is possible wrt 4-barrel assembly tool preparation/setup (which is planned for this area in 2004)

SR1_FloorPlan010503

11.) Racks

All cooling pipes for water cooled racks have been stripped. The installation of rack infrastructure (electrical distribution of rack, mounting of cooling pipes, heat exchangers etc) started and will last for two weeks now. (Per, Arvid, Richard). The rack cooling system (installed except flex. connection to racks) will be commissioned by ST as our rack work is finished.

12.) Immediate time plan SR1

7/8 May: UPS check by SIemens
12 May: Start cable tray installation
approx 20 May: pipework for dry air system
approx 25 May: start cleaning of cleam room/laser room (order signed list week)
now-14 May: rack work (commission of cooling by ST/safety checks after that)
June 1: start of moving to SR