The WA105 17m3 LArCryostat pre-experience

M.Ne

Status

• Tender done for the membrane part, 1 German firm selected• A lot of time wasted to renegotiate the price and the

deliverables• Order still not out because the various lawyers are still

discussing some final details• Engineering of the warm container ongoing. Firms are now

consulted• Goal to have it installed by March 2015

Cl. Room

Some dimensions• The final inner volume is 3*4.8*2.4 (height*length*width): 35m3. The

volume of LAr stored is 1.5*4.8*2.4: 17m3.• Tank capacity (LAr volume) : 17 m3

• LAr level : 1.5 m from bottom• Minimum liquid level for pump restart : 0.7 m (indicative)• Residual Heat Input (RHI) : 5 W/m2• Insulation density : 70 kg/m2 (PU Aged HFC245)• Insulation thickness : 1 m (as computed by GTT in order to fulfill the

required RHI)• BOR : 0.069 % (Calculated for indication)• Design pressure : Max 1050 mbar / Min 950 mbar• Design / operating temperature : 77 K / 87-89K

COST

• WE have just contracted the membrane cryostat and not the warm container

• Costs: engineering, firm overhead, licences : 150Keuro ~ 190 K$ material (including transport) : 127 Keuro ~ 163 K$ installation at CERN + tests : 291 Keuro ~ 375 K$

Assuming a surface (without cover) of ~ 55mq

Material 3K$/m2 Installation 6.8K$/m2

Documents:

• Technical specs: https://edms.cern.ch/document/

1365672

https://edms.cern.ch/document/1369869

Bill of material

Bill of material

Bill of material

Bill of material

Outer structure

See D.Mladenov presentation:

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The outer structure

Overview

Steel profiles bolted and welded together

The internal dimensions

6.5m x 4.2m x 4.1m (L x W x H)

Weight - 12T

Modular Design i.e. allows possibilities for future extension

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FEM AnalysEs

Self weight Cap weight

LAr weight

Over pressure

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Transportation

Production

Manufacturing Drawings

Companies contacted

Transport studies

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