Removing tiles for analysis
The JET shutdown is progressing steadily. Remote Handling Group has been working in-vessel since December.
A cool project
One of the most interesting refurbishment tasks for JET this year is costing over half a million euros, extending the lifetime of JET and reducing operating costs. The original construction of JET’s site cooling water system was carried out under two separate contracts. The pipework in the immediate area of [...]
Get big diagnostics out of the way
It is now three weeks since the last plasma pulse of 2012, and JET is now in a state called ‘shutdown’. At the end of operations a lot of work has to be done before access is gained to the inside of the torus, which is planned to happen in [...]
Preparing the next experiments in 2013
Last week marks the end of the first period of JET operations with the all-metal ‘ITER-Like Wall’. The machine is now going into a period of several months of maintenance, ready to restart operations early in 2013.
Keeping it clean
During recent campaigns, experiments have been performed to adapt an already established cleaning concept for the beryllium and tungsten walls. The first indications from the physicists are that this will be an excellent candidate for use in ITER.
Hybrid operation achieved
There has been good progress in implementing the new capabilities of JET. Neutral beam heating power has now reached 21MW and routinely and reliably operated at 16 to 18MW.
Ready for a record
The principal ‘additional heating’ system on JET is the Neutral Beam Injection (NBI) system. During the last experimental campaign, this heating system routinely delivered over 20MW of power to the plasma. As you might remember, one of the tasks during the 2009/10 shutdown was to upgrade this system and install [...]
An exercise in choreography
During one busy weekend in January, while plasma operations had paused, another upgrade was installed on JET. The item in question is called a ‘collimator’. It weighs about 2 tonnes and it is made of layers of lead and polythene, contained in a stainless steel envelope. To understand what a [...]
ICRH works, ducts conditioned, maximum power delivered
Good progress is now being made with JET’s additional heating systems. The ICRH system is working routinely, and significant amounts of power are also being injected using the Neutral Beam Injection systems. As you may know, JET’s NBI is divided into two separate Neutral Injection Boxes, (NIBs), located diametrically opposite [...]
Turning up the power
Since the last update, commissioning of the heating and current drive systems has been progressing steadily and ’additional heating’ systems are now routinely being used in daily operations. Keeping a careful eye on the temperatures of in-vessel components the ICRH heating system has been operated in most of its normal operating [...]
