PDF Download

Project Progress Summary

23 January 1991

Multidisciplinary Appraisal

• DOE Oak Ridge Operations has begun its ES&H and QA appraisal of CEBAF. One group leader will be present the entire two weeks; reviewers for specific areas will b present for either the first or second week. Specific areas to be covered are as follows, with the number of reviewers in parentheses after each topic.

WBS 1

• The cryomodule cutter has been received and works very well.
• The second cryomodule is being cut apart for rework of the HOM flange joints to prevent leaks.
• The four cryounits for the third cryomodule are being assembled back into their helium vessels following rework of their HOM flange joints.
• Ten HOM flanges have been leak checked at room temperature with no leaks. Ten ceramics have been brazed and will be leak checked at 2 K.

WBS 2

Magnets:

• A design review was held for the arc quadrupole (QA).

Survey and Alignment:

• Started the program to increase the density of the monument network throughout the accelerator enclosure.
• Another level survey of the enclosure was started as part of the ongoing monitoring effort.

Vacuum:

• The first shipment of custom-made clamp-on power supplies for the arc vacuum pumps is on its way.

Occupational Health and Safety:

• In addition to normal cleanup, we reviewed a considerable number of details of our work areas to enhance safety-improving electrical wiring practices, minimizing tripping and snagging hazards, and improving control and awareness of the chemicals we use.

WBS 3

RF Controls:

• Control module now running with the math co-processor activated. The speed of operation is much improved.

RF Power:

• The scheduled HOM filter manufacturing progress review was held at CEBAF.
• Gamma Microwave problems with slow delivery from its vendor have been overcome.

Fabrication:

• Started work on the first production crowbar unit, which will be used as a model for the remaining 43 units.

WBS 4

• No report received.

WBS 5

• No report received.

WBS 6

• No report received.

WBS 7

• 2-K cold box arrived and set in place.Some National Electrical Code violations identified. Corrections in progress.
• All area housekeeping completed. Cleanup time has been allowed each day. CVI has been informed of the new rules of daily cleanup.
• Another leak has been identified in the 4-K cold box; repair activities are underway.
• The new trim for the 130 valve, #4 turbine bypass, does not seat and seal properly. This is a number one priority; repair activities are underway with CVI.
• Electrical Inspections have been completed at all cryogenics locations. Corrections are under way.
• Vacuum header for regeneration of the 80-K purifiers at the CHL is complete. LN2 and electrical must be completed prior to operation.
• A leak test of the 30,000 – gallon LHe dewar is under way.

WBS 8

• No report received.

Accelerator Division Support Services

Stockroom:

• All PR’s for WBS 3 electronic kits were completed.

External Fabrication:

• Contracts for WBS 3 have been awarded for:
  • 125 crates and modules
  • 47 assemblies of the multi-output power supply.

Training:

• Within the next ten days Personnel will publish the next “Training Opportunities Bulletin,” providing details on upcoming courses including the following: