WP 12.3 Moderator & Reflector Systems

D. Lyngh, M. Kickulies, J. Ringnér, J. Jurns, Y. Bessler (FZJ), M. Klaus (TUD), H. Quack (TUD)

TAC12Presenters: Daniel Lyngh, Work Package Lead Engineer ESS

Jesper Ringnér, Work Unit Lead Engineer ESS Yannick Bessler, IKC Project Manager FZJ

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Outline

• Project Highlights– Recent Progress– Schedule (PDR & CDR)– TAC recommendations

• TIK 3.1 Moderator & Reflector Components– Introduction of In-Kind Partner Forschungszentrum Juelich– Cold & Thermal Moderator Design & Manufacturing– Beryllium alternative Concept– Twister Design Developments

• TIK 3.2 & 3.3 Cryogenics Systems– Systems Overview

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Recent Progress

• In-Kind Contribution from Forschungszentrum Juelich– Agreement coming into place– IKC work initiated

• Moderator & Reflector Plugs (MR Plugs)– Preliminary Design Reviews Performed June -15

• Cryogenic Cooling System– Preliminary Design Reviews Performed June -15– Helium Cryoplant RFQ issued in Sept-15, due Dec-15

Schedule

MR PlugsCold

ModeratorsThermal

ModeratorsReflectorsHandling

SystemStructure &

ShieldingLiquid Hydrogen System

Concept Phase Final Design Make Phase

PDR

PDR

2019Q1 Q2

2015Q1 Q2 Q3 Q4

2016Q1 Q2 Q3 Q4

2017Q1 Q2 Q3 Q4

2018Q1 Q2 Q3 Q4

PDR

PDR

PDR

PDR

PDR

SAT

PDR

Cryogenic Cooling System

He Cryoplant

PDRPDRPDR

PDR

PDR

PDR

PDR

PDRP

DR

PDR

PDR

PDR

PDR

Delivery CDRPDR

PDRPDR

PDR

Site Inst. & Testing

Site Work

2014Q3 Q4

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TAC 11 RecommendationsTwister Bearings

Recommendation:A simple version of the Twister concept is a reasonable approach. Failure-mode studies for the bearings should be continued (beam losses at the proton beam feed-through need to be carefully studied)Response:Failure mode analysis has been initiated and will be completed in the next few months. Several design improvements have been made to reduce the risk and consequence for a rotation problem.An analysis comparing the force needed to break a cold-welded roller bearing versus a cold-welded sliding bearing has been uploaded to the TAC-12 Indico site.Further studies needed that will be part of detail design:Complete analysis of all identified failure modes, some should be done in cooperation with remote handling group. For example:-Rotation tool failures-Issues lifting the target wheel-Issues lifting the plugs-Issues due to failures of surrounding shielding blocksCollecting further information and experience to make judgment of material combinations and designs that could reduce the risk and effect of the issue.

TAC 11 RecommendationsTwister Bearings

• Number of bearings reduced (4->2)(due to reduced number of shafts)

• Increased distance from bearings to hot spot and proton beam aperture

• Split plug as redundancy (top/bottom) remains so far

• Bearings of coated metal or ceramic hybrid with respect to radiation, cold welding, no lubricant and static load

• Calculation of forces to break a stuck roller bearing

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Bearing 1

Bearing 2Hot Spot

TAC11 TAC12

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TAC11 RecommendationsCryogenic System

Recommendation:• The TAC would like to see a presentation on the

design of the cryogenic system at the next meeting.Response:• Information on the design of the liquid hydrogen and

helium cryoplant systems will be provided in the TAC-12 meeting as part of the Moderator and Reflector Systems presentation.