1 Homes take DUSELNSF Preliminary Baseline Review - April 13-15, 2010

Bob AltesEngineer- ISE

Water Shield Engineering

Figure Courtesy PDG and LBNL

Homestake DUSEL FAARM AARM Collaboration Meeting

UC Berkeley

March 19-20, 2010

2 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

OverviewOverview

• Structure–Construction Concepts–Strength Issues

• Design issues• Fabrication• Transport• Assembly Integration

4850 Level Campus

7400 Level Campus

3 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

ConceptsConcepts

• Liquid/Metal Skin Modular–Structural modules-building blocks–Non structural modules-external structure

• Liquid/Plastic container modules–External structure requirements

4850 Level Campus

7400 Level Campus

4 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Steel Modular Water ShieldSteel Modular Water Shield

• Six foot water shielded hot cell

• Chevron interfaces

• Mild steel-3/16in. Thick– Stiffened vertical plates for

Hydrostatic pressure &Gravity loads

• Inside dimensions– 5’x8’x12’

• Air vented to top row of tanks

4850 Level Campus

7400 Level Campus

5 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Tank ModularTank Modular

4850 Level Campus

7400 Level Campus

6 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Steel modular Water ShieldSteel modular Water Shield

• 6 foot water shielded facility

4850 Level Campus

7400 Level Campus

7 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Concepts-Cont.Concepts-Cont.

• Plastic Shielding–Type of material and implementation method–Availability–Castings

• Cast Block modules• Panels (thick) built-up from thinner plates or castings

–Sprayed in place• Probably less dense than cast material• Possible EH&S restrictions

–External structural requirements

7400 Level Campus

8 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Acrylic Panel ShieldAcrylic Panel Shield• Concept

4850 Level Campus

7400 Level Campus

9 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Strength IssuesStrength Issues

• Walls–Vertical and Lateral stability –Bracing requirements

• Roof–Design for shielding wt. plus ancillaries–Tensile/compression and shear stress–Lateral stability-buckling–More challenging for plastic

• Cavity floor–Loading/stiffness requirements–Minimize mass of less radio pure materials

10 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Cavity Floor ConceptCavity Floor Concept

• Removable Panels– Like Computer room floor– Box construction– Face thickness to support

Concentrated loads– Web for support of

Distributed Loads• Box support structure below

Panels-Stiff• Piers below stiff support

structure – Shimmed/grouted to module

floor

4850 Level Campus

7400 Level Campus

11 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Design for minimum “shine”Design for minimum “shine”

• Water/Steel or plastic containment Modules–Walls

•Venting and Head issues•Stepped horizontal joints

–Metal/metal, plastic to plastic gaps–Air voids–Hydrogenous thickness

•Roof–Stepped vertical joints–Hydrogenous thickness

•Utility penetrations

4850 Level Campus

7400 Level Campus

12 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Tank InterfacesTank Interfaces

• Horizontal interfaces– Metal/metal on shoulders-tolerances– Air removal on flat headers difficult– Possible hydrogenous 1/3-2/3 t

• Chevron Interfaces– Metal /metal contact through

interface– Air removal easy-anything over

3 degrees good– Hydrogenous greater than ½ t

4850 Level Campus

13 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Tank InterfacesTank Interfaces

• Vertical Interfaces– Metal to metal on shoulders

and lower vertical surfaces

– Clearance on upper vertical surfaces

– Clearance gaps filledwith plastic plate/sheet (Polyethylene for example)

– Hydrogenous shieldingt/2 or greater in joint region

14 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Fabrication and TransportFabrication and Transport

Fabrication Materials and Equipment Transport Rely on 18000 kg (18 Ton) Yates Super Cage

Dimensions: Height 4.9m,16 ftLength 4.1m,13.4ftWidth 3.2m,10.5ft

4850 Level CampusSuper CageAuxiliary Hoist

15 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Fabrication-cont.Fabrication-cont.

• Metal modules•Fabrication at 4850 level

–Plate and equipment size limits–Where?–Quality Control and EH&S issuesoMaterial handlingoWeldingoChemical cleaning and passivation type processes

•Vendor surface shops–Module finish size limits

• Structural Elements•Vendor surface shops•Yates lift limited (same as raw stock)

16 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Fabrication-cont.Fabrication-cont.

• Plastic modules•Plastic Panels

–Vendor surface shopsoCastingoMachining and module assembly /disassemblyoShipping

•Module assembly–Components and assemblies to 4850 –Yates size limit –Assembly in module

4850 Level Campus

7400 Level Campus

17 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Assembly IntegrationAssembly Integration

• Scheduling by module occupants–Staging area and crane use

• FAARM assembly plans–Water shield–Immersion tank –Ancillary equipment

• Cranes rigging and special fixtures–Module 30-40 ton monorail and 20 bridge –Small crane inside the water shield–Experiment supplied fixtures and rigging

• Many design related issues here 7400 Level Campus

18 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Module Space/Crane Issue Module Space/Crane Issue

• Layout assumptions– Design of Monorail can be brought back to 2m– Bridge crane available

During assembly

• Risk– Assembly scheduling

For 3 experiments– Bridge crane may be

Blocked by other users– Agreements necessary

among module occupants

19 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010

Shielding LiquidShielding Liquid

• Processing system

• Breech containment–Processing system–Shield volume 4850 Level Campus

7400 Level Campus

20 Homestake DUSELAARM Collaboration Meeting - March 19-20, 2010