ESS Active Cells Machining Station 15/06/2018 1 COMMERCIAL | - - PowerPoint PPT Presentation

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ESS Active Cells Machining Station 15/06/2018

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RACE-ESS-TEM-0038

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Machining Station Procurement

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• OJEU negotiated procedure.
• PQQ period expected to commence in August or September, pending ESS at the end of this month.

Approximate timescales below:

• 6-8 weeks expected for Pre Qualification Questionnaires to be received.
• 2-4 Weeks to review responses and issue Invitation to Negotiate to successful responses.
• 8 Weeks to receive initial bids.
• 2 Weeks to review submissions.
• 4 Weeks for clarifications.
• 4-6 Weeks for negotiations of pricing, scope, risk, technical requirements.
• 4 Weeks for Best and Final Offers.
• 6 Week to select preferred bidder.
• 2 Weeks Standstill.
• 2 Weeks to finalise contracts.
• Contract Award Expected around August 2019.
• Installation on Site in Lund, Sweden in Summer 2021.

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ESS Active Cells Size Reduction Process

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Two goals:

• Size Reduction into sections that fit in

a 3mx2mx1m box.

• Material Segregation
• Tungsten Cassettes from the

Target Wheel.

• Beryllium Cassettes from the

Moderator Reflector Plug Two key processes:

• Shaft Cutting
• Precision Machining

This opportunity reflects the Precision Machining process that involves

• perations on the Target Wheel and

Moderator Reflector Plug and generally involves material segregation. Target Station Components

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Operations: Moderator Reflector Plug

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Three Cuts:

• Light cutting through aluminium to

release the Irradiation Module.

• Cutting through the top of the MRP

Frame to access and cut the Beryllium Cassette piping.

• Long, deep cut to allow the Beryllium

Cassette to be lifted free.

• Connection points available to

allow Cassette clamping during cutting operations.

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Operations: Target Wheel 1

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Three tasks to remove the Tungsten Cassettes:

• Remove the Target Wheel Rim
• Cut the low penetration retaining welds

that hold the Tungsten Cassettes in place that were concealed below the Rim.

• Extract the Tungsten Cassettes:
• Up to 10kN radial extraction force

needed

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Operations: Target Wheel 2

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Final Size Reduction Task:

• Allow the remaining wheel to fit within

the Waste Storage Baskets.

• 1 long cut along each side of the wheel

as shown.

• Key issue is the depth structure of

these cuts.

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Space Allocation

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• Large part of the Process Cell allocated

for the Machining Station.

• Access by grapple and hoist decreases

towards one end of the volume, limiting the equipment that can be installed there.

• Manipulator access to the whole

volume, dependent on the equipment installed.

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Additional Constraints

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• No cutting fluids.
• Limited hydraulics permitted.
• All in cell elements to be designed for maintenance by robotic manipulator

and the available cranage.

• Swarf and dust production must be controlled.
• Limits on use of lubricant, polymers and silicon electronics due to radiation

field – see next slides.

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Lifting Attachments

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Lifting attachments to allow for the manipulation of the components to be moved to the Machining Station by the in cell handing System. The concepts below have been generated to allow the definition of the lifting points.

MRP Frame Lifting Adaptor Beryllium Cassette Machining Clamp and Lifting Adaptor Target Wheel Lifting Adaptor Tungsten Cassette Lifting Adaptor

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Radiation Hardness

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Two Options:

• Design to the integrated dose expected to be ~3.5MGray over 4.5 years.
• Individual components to be designed to approximately 1MGray

hardness with the option to replace remotely.

• Follow provided design rules that include:
• All silicon electronics installed outside the cell in provided rack room.
• Class H high temperature motors.
• Brushless resolvers in place of encoders.
• Polyurethane or PEEK cabling, or other cabling rated to 1MGray.
• Only ethers or alkyl aromatics wet lubricants allowable.

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Additional Cuts

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Additional points MAY be awarded in the assessment of the tenders if the following cut on the Target Wheel can also be completed, either within the Machining Station Space Allocation, or at the Receiving Fixture. Lip weld to be cut.