NSTX Outage - Plan

1. NSTX Outage - Plan 1

2. NSTX Outage – Diagnostic considerations • Erik Perry will be the manager of the construction activities in the Test Cell. • Joe Winston will coordinate and be responsible for diagnostic removals and re-installations. • Diagnostic removals will be performed by the diagnostic technicians, machine technicians, and cognizant physicists (as needed). Joe will coordinate this work with help from Lane Roquemore. • MSE_LIF commissioning, MPTS testing, etc. over the next two weeks. When that work is complete, the area will be opened for general access until October 14th. We will use this time to document diagnostic installations with both photographs and labeling of diagnostic hardware on and near the machine. Some diagnostics can be removed during this time. • On October 17, the power to the Test Cell will be disconnected and temporary power to be used during construction will be connected (outlets and lighting). This will ensure that all racks are positively de-energized. • The vacuum vessel will be vented about September 19th. No vessel entry will occur until well into the outage. • From October 17 on, only construction personnel with the required safety training will be permitted in the Test Cell. This training includes Basic Electrical Safety, Fall Protection, and Ladder Safety. Personnel accessing the Test Cell will be briefed on hazards each morning. This is necessary because hazards will be created by the construction process, e. g., holes in the floor, missing railings, etc., and they will change from day to day. Entry into the test cell will require a written procedure for the work to be done and the procedure will need to be reviewed and approved by the Work Control Center (WCC). The WCC will schedule when the work can occur. 2

3. NSTX Outage – Diagnostic considerations • During the first month of the outage (starting mid-October), the cable tray at the top of the machine will be removed, RF piping within 10 feet of the vacuum vessel will be removed, the new 118 foot elevation platform on the west side of the machine will be installed, and removal of racks that will be moved will start. Removal of diagnostics on the top and bottom of the machine will happen during this time. • During the second and third months, rack removals will continue, diagnostic hardware will be removed from Bays J, K, and L, and cables, tubing and optical fibers will be coiled up to outside the envelope of the TF coils and protected. Note that the plan is to pull cables, tubing and optical fibers only as far back as needed to create the needed space for construction work and to ensure that they are well protected from possible damage. This will be the case everywhere around the machine. The distance to which cables, tubing and optical fibers have to be pulled back will vary somewhat depending on location but it will not be farther than necessary. • Diagnostic removals will then proceed to other areas of the machine as described in the attached document. • Later in the outage, diagnostic re-installations will take place as construction work is completed in specific areas of the machine. This is also described in the attached document. • Diagnostic removals will be done according to procedures that will be written for each area of the machine. Joe Winston will coordinate the execution of the procedures. A generic removal procedure will be used if a specific procedure has not been provided. They will be written using a template that has been developed and will list the systems to be removed, the people to be involved, and special concerns, e. g. precautions for handling and storage of delicate components. Sign-off by the cognizant physicist will be provided. • Diagnostic hardware will be stored in the Upper and Lower DARMs. Specially-built crates will be used to protect the hardware and to keep items that belong to each diagnostic together. Larger items can also be stored in the TFTR basement. 3