G-2 Cryogenic System

Maintenance Items Readily defendable Refurbish expansion engine Cost basis – previous expansion engine refurbishment Spare parts for expansion engine Cost basis- previously purchased parts Recertify relief valves Cost basis – RHIC relief valve recertification Compressor maintenance Cost basis -estimate from compressor manufacturer Replace polyflow tubing Cost basis- known tubing cost Replace valve positioners Cost basis – valve positioners purchased for RHIC Flow controllers on power leads Cost basis – flow controllers purchased for RHIC

Fix Known Helium Leaks How far from being defendable? Need to review system leaks and determine difficulty in locating/fixing them Time and Effort needed to make it defendable 1 engineering man week 1 technician man week Reexamine Coalescers for potential oil carryover How far from being defendable? Size and cost charcoal adsorbent system Time and Effort needed to make it defendable 4 engineering man days Revamp heat shield LN2 system How far from being defendable? Need to size new valves to make accurate cost estimate Time and Effort needed to make it defendable 2 Engineering man days Modifications/Upgrades

Gas purification equipment How far from being defendable? Need to size purification equipment Get preliminary quote Determine how it integrates into the G-2 cryogenic system Time and Effort needed to make it defendable 1 engineering man week Smaller heat shield valve on Inflector How far from being defendable? Need to size valve Need to get price quote Time and Effort needed to make it defendable 1 Engineering man day Revamp Magnet Warmup System How far from being defendable? Need to determine warmup system design Size valves and components to get Time and Effort needed to make it defendable 1 engineering man week Modifications/Upgrades

Refrigerator Operations Oil in G-2 Refrigerator The G-2 refrigerator ran at a higher average temperature last run Unclear as to what extent oil has permeated the G-2 Refrigerator 3 man weeks of engineering 3 man weeks of technician time Using SSC Plan ‘B’ refrigerator Need to quantify G-2 Heat load Need to estimate mount effort to get plan B refrigerator operational Determine amount effort needed to integrate the refrigerator into the G-2 system 1 man month of engineering