G-2 Cryogenic System

1
G-2 Cryogenic System
2
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

3
Modifications/Upgrades

• 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

4
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

5
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