SC 1 R Cold Box PDR Overview SC

SC 1 R Cold Box PDR Overview SC 1 R Cold Box Preliminary Design Review K Dixon Tuesday, December 1, 2020

Review Committee Charge 1. Does the process design meet the stated Accelerator requirements? 2. Is the cold compressor design requirements documentation ready for procurement? 3. Is the heat exchanger design requirements doc ready for procurement? 4. Are the planned modifications to the infrastructure suitable for cold compressor operations? 5. Does the commissioning strategy presented have a favorable chance of success? 6. Is the plan for removing the existing cold box sound? 7. Is the plan for installing the new cold box reasonable? 8. Does the vessel look like it can be easily fabricated at a reasonable cost and structurally sound? 9. Does the internal piping allow room for access to the critical components? 10. Are the technical risks accounted for and suitably addressed for a preliminary design? SC 1 R PDR Overview 2

SC 1 History • Delivered by CVI using 4 LN-cooled Cold Compressors (CC’s) in 1990 • Commissioned in 1994 • Isolated from system in 1999 • Reconfigured to include 5 CC’s, increased HX NTU’s, thermosiphon cooling, volumetric and flow stability, etc. • Re-commissioned in fall of 2013 • CC 4 failure in spring of 2015 • Recovered in fall of 2015 • CC 5 failure in spring of 2017 • Cold Compressor Advisory Team (Rode, Oren, Arenius, Howell, Freyberger, Ganni, Klebaner) unanimously recommended replacing SC 1 during June ‘ 17 meeting. • Presently supporting 2 K operations. SC 1 R PDR Overview 3

CHL 1 SC 1 Cold Compressor 4 Failure • Compressor 4 failed 3 -25 -15 • Magnetic bearing cabinet control problem resulted in hard rotor landing at high speed that damaged back up ball bearings, rotor, etc. • Spare compressor borrowed from SNS and modifications performed to be ready to install it for fall FY 15 run • Failed compressor sent to France －Manufacturer repairing using spare parts －Unit returned after two years －Finishing a test program to verify health －Readiness uncertain SC 1 R PDR Overview 4

CHL 1 SC 1 Cold Compressor 5 Problem • Cold compressor 5 problem 39 -17 • Problem traced to internal broken wire for bottom rotor radial position sensor －Least operating hours • Wire repaired and others checked • Compressor tested warm －Bearings energized －Properly levitated －Rotor spun at high speed • Compressor installed and running successfully SC 1 R PDR Overview 5

Overview of SC 1 R • DOE Science Lab Infrastructure (SLI) Funded －$8 M －Includes design, cold box and spare cold compressors －Installation, interfacing piping and electrical wiring/panels not presently included • Schedule －Conceptual Design Complete 9/30/17 －CB Design Completion 6/29/18 －Cold Compressor Delivery 12/21/18 －CB Assembly Complete 12/20/19 Critical Path －Project Complete? ? 12/23/20 • Conceptual Design －Use present location －Use 5 external water-cooled CC motors with VFD’s and long-life bearings • Could use similar/same size as MSU & LCLS 2 －Maintain Bayoneted Connections incl 2 K Return Header －Keep large 2 K/4 K HX inside cold box －Vacuum break at LP Return header considered but eliminated －Platform for upper shell access SC 1 R PDR Overview 6

Overview of SC 1 (cont. ) • Cold Box Structural Shell －Contracted build to print －ASME BPVC design requirements －Painted carbon steel, SA-517, Gr 70 －Inverted st. steel nozzles & flat plates with domed heads • Allows room for discharge nozzles • Avoids large flat head • Internals －Contracted build to print along with shell －ASME B 31. 3 design requirements －Use similar HX specification as SC 2 －Bellow-sealed control valves －Partial LN 2 shielding for 2 K piping • Overall Dimensions －17’ tall x 10. 5’ dia －<28 T weight SC 1 R PDR Overview 7

SC 1 R P&I Diagram SC 1 R PDR Overview 8

Cold Compressor Requirements • General －5 CC’s in series －Mass flow controlled by adjusting fixedratio speeds in CC’s 1 -4 during steady state operations －CC 5 speed controlled using its suction pressure • Casings －Design per ASME BPVC and API 617 －4. 1 bar @ 310 K design pressure • Motors －VFD controlled －Externally accessible －Design conforming to NEC • Bearings －Long-life, 5 yr －5 -axis support －Fully instrumented SC 1 R PDR Overview 9

Cold Compressor Requirements (cont. ) • Operating Conditions －Maximum • 250 g/s flow • ≤ 28 mbar @ 3. 6 K, inlet conditions • 1. 2 bar @ < 30 K discharge －Nominal • 200 g/s flow • 31 mbar @ 3. 8 K, inlet conditions • 1. 2 bar @ < 30 K discharge SC 1 R PDR Overview 10

‘ 2 K/4 K’ Heat Exchanger Requirements • General －1. 5 k. W duty, 3 NTU －Brazed aluminum plate-fin constr. －Includes Al/SStl transition joints －Design conforming to API Std 662 －Constructed to ASME BPVC— ‘U’ stamped Parameter Supply Stream Return Stream Flow 250 g/s Inlet Temperature 4. 5 K 2. 2 K Outlet Temperature 2. 5 K 3. 3 K Max Dif Pres 1. 7 mbar 2 mbar Design Temp 340 K 2 K Design Pressure 350 psi 100 psi Inlet/Outlet Nozzle SC 1 R PDR Overview ≤ 10 NPS 11

Safety Considerations • Removal and Installation will be performed in close coordination with ESH&Q personnel • Most equipment will be designed/procured using national consensus codes • Safety related analyses will be included in the Final Design Review • The Installation and Removal, including safety aspects, will be included in the Final Design Review OR Installation Design Review SC 1 R PDR Overview 12

• Charge • History • Failures • Overview • Cold Compressor Reqmts • Heat Exchanger Reqmts • Safety Tuesday, December 1, 2020