Alcator C-MOD Weekly Highlights
				Jan. 13, 1994


The scheduled shutdown period prior to Phase II operation is continuing. Most
tasks still underway are in the re-assembly or installation phases, i.e. we
have stopped taking things apart and are now putting things together. 

The west side of the bus tunnel has now been sealed following a final
inspection last Friday.  In addition, work on the aluminum bus above the bus
tunnel was completed.  This work involved inspection and cleaning of all high
current joints, improvements in reversal switch configurations, and improved
bracing for high current operation.

The job of removing tile modules has been completed, and the installation of
repaired EF1-lower modules has begun. Divertor current shunt fabrication is
still ongoing, but will not impact first wall re-assembly.

The LN2 feedline has now been run into the cell, and welding of flanges is
complete.  Work is now centered on fitting-up and welding into place the
emergency backup lines.

Leak checks on the horizontal flanges continue.  The vacuum PLC software has
been modified and PLC hardware added to allow continuous measurement of the
horizontal port secondary seal pressures.  The secondary seals protect the
vacuum system against failure of the primary seals, and are continuously
pumped.  C-port extension has been removed, cleaned up and is now ready to be
re-installed.  New boots for the horizontal ports have been completed, and
their associated insulation is now being fabricated.

Other work during the last week included continuation of vessel heater
modifications, and debugging of the TF scanner. Approximately half of the
vessel heater work is now complete. The TF scanner will allow measurements to
be made made of the junction resistance at all TF sliding joints.

A meeting was held at M.I.T. with Jim Yugo and Royce Sayer of ORNL (FEDC), to
discuss the collaboration on disruption and VDE modeling for Alcator C-MOD.
TSC and SPARK will be employed to model eddy and halo currents and 3D effects
to better understand disruption forces on internal components, as well as to
understand the underlying physics. Topics discussed included a review of C-MOD
observations on disruptions and VDE's, capabilities of the codes, and 
presentation of some preliminary results from the codes based on CMOD data. 
Short- and medium-term  tasks and objectives for the collaboration were agreed 
upon.