JET Anniversary - 20 May 2004

Transcription

1 JET Anniversary - 20 May 2004 JET Today - preparing for ITER operation Frank Briscoe UKAEA Culham Operations Director 1

2 JET Operations under EFDA former JU Alistair Bell, Geoff Cordey, Alan Kaye, Ken Pagett, Derek Stork Henk Altmann, Damian Brennan, Clive Challis, Dragoslav Ciric, Steve Cox, Rodney Cusack, Jon Farthing, Chris Gowers, Simon Hotchin, Eric Jones, Tim Jones, Richard Layne, Peter Lomas, David Martin, Guy Matthews, Vasily Parail, Alan Parkin,Bharat Patel, Robert Pearce,Adrian Terrington, Alan Rolfe,Steve Shaw, Klaus-Dieter Zastrow and ~400 other individuals 2 new to JET Martin Cox, William Morris Trevor Edlington, David Edwards, John Hay, John Hill, Duncan Nielsen, Mark Nightingale, Tom Todd, Alasdair Urquhart, Peter Williams

3 JET Today - preparing for ITER operation 5 areas where JET can contribute to ITER operation: performance culture - managing the lifetime remote users - data handling use of beryllium and tritium operations close to those under a nuclear licence training of international team for ITER 3

4 Performance culture JET is expensive to run - it should be used intensively and for as long as there is a strong programmatic need high intensity operation 2-shift operation 24 hour manning weekend working problems fixed quickly during shift, overnight, at weekends by interventions of minimum duration rotary valve changeout, October

5 2003 performance highest magnetic field under EFDA highest plasma current under EFDA most demanding operation ever 4.0 Tesla 4.0 MA 3717 pulses highest ever D-D neutron yield 4.5x10 19 highest ever Deuterium NB power 22.7 * MW 3 rd operation with tritium (after 1991 and 1997) * January

6 Managing the lifetime Chief Engineer, Machine Protection Working Group Engineers in Charge and Session Leaders, Operating Limits, Automatic pulse checking, etc. ~15% fatigue life of main components used to date more generally other systems are being sustained through maintenance, repair, refurbishment and (when they are worn out or obsolete) replacement from a technical viewpoint JET could be run for another decade or more during ITER construction 6

7 10/03/ /09/ /03/ /09/ /03/ /09/ /03/ /09/ /03/ /09/ /03/ /09/ /03/ /09/ /03/ /09/ /03/ /09/ /03/ /09/ /03/2004 Reliability over past 10 years Total hours lost per week No trend visible 7 Lost Hours / week

8 Data - volume increasing each year more diagnostics, longer pulses, real time control raw data per pulse 1GB 1MB 2O years 8

9 Data - faster analysis between pulses Intershot Analysis Statistics Analysed Data per Pulse (MB) Data volume increased by factor of ~2.5 Analysis time reduced by factor of ~ Completion Time (mins) /05/ /03/ /12/ /08/ /03/2004 Date Mean Data Creation Mean Completion Time 9

10 Remote users - new system for data validation 1999: ~30 users, all local 2004: ~150 users, mainly remote,19000 requests under ReqCo DV Committee oversees quality and recommends improvements Physicist requests analysis Diagnosticians analyse and validate data 10

11 Remote users - new suite of analysis codes 1999: 4 analysis codes, ~15 users, all local 2003: 14 codes, ~90 users, mainly remote 30 Gflops Growth in use over past 4 years project launched in 2004 to integrate present suite of codes Code Management System Pre-processing Job Execution Transport Job Completion Post-processing MHD, turbulence simulation,. DATABASES: JET, ITER, MDSPlus Catalogue all of this experience with remote users will be useful for ITER 11

12 Use of Beryllium 4 tonnes since 1989 safe system of work containment through tenting and isolators personnel protection workplace monitoring on-site analysis service health surveillance multiple containment and pressurised suits Know-how could be made available to ITER through Code of Practice and experienced staff 12

13 Use of Tritium Tritium capability is based on: original design features vacuum vessel, etc. biological shielding specific systems tritium fuelling/recycling remote handling safety and environmental approvals safe system of work (along same lines as Be) all of this know-how could be made available to ITER 13 in- vessel MASCOT manipulator

14 2003 Trace Tritium Experiments DTE Budget 2003 Used MeV neutrons 2.4x x x MeV neutrons 7.2x x10 18 tritium introduced via gas puff 35.0 g 0.45 g 0.38 g 100 times less use of tritium in TTE than in DTE1, but tritium systems still fully exercised only 13% of D-T budget used to date 14

15 Controlling tritium in the tokamak Novel system for removing tritium from first wall materials flash-lamp giving >1GW/m 2 deployed using MASCOT Co-deposit Cleaned substrate laboratory tests already done JET trials about to be performed 15

16 Dealing with tritium-contaminated items U-bed components being maintained techniques to remove T being developed Flakes in subdivertor region 16 PTE trolley now decommissioned

17 Developing tritium-compatible equipment breach of pump line removing failed Normatex pump 17 partly dismantled pump, failure mechanism being investigated

18 Operations close to those under a nuclear licence Culham is not a licensed site under the UK Nuclear Installations Act, unlike the other 4 UKAEA sites, however JET is: operated under an approved Safety Case a Safety Management System (similar to UKAEA) an ISO 9001:2000 Management System audited by Internal Inspection Department monitored by a Safety Committee with independent members from outside UKAEA JET is operated under the same kind of safety regime as will be applied to ITER 18

19 ISO 9001:2000 process map Process: Operate & Modify JET Process Owner: M Cox Inputs EFDA-JET Work Programme Operator Requirements Plan Experimental schedule (3.1.1) Execute JET facility upgrade (3.1.6) Plan & conduct Maintenance (3.1.7) Prepare Pulse schedule (3.1.2) Plan & conduct Shutdown/ Intervention (3.1.8) Recommission Conduct experiments (3.1.3) Restart machine (3.1.9) Operation Reports Manage data (3.1.4) Operate machine (3.1.10) Report results (3.1.5) Process Measures Outputs Briefings Basic science transfer Industry transfer Publication Output to ITER Input to QPR Progress Reports Operation Reports Page Owner: M Cox Process: CD/MAP/3.1.0 Issue : 1 Published: April 2003 an example of the kind of modern management system which a nuclear regulator will expect to see 19

20 Training of international team for ITER JET has always had an international team under EFDA, the user team of ~300 physicists is mainly European plus some US, RF, JA, and CN EFDA could agree to a wider use by ITER parties the operator team of ~400 staff is mainly UKAEA plus 50 operator secondees over past 4 years UKAEA is ready to open up the operator team to other ITER parties this would fully internationalise both the use and operation of JET and provide an opportunity to establish the ITER operation team in advance 20

21 Conclusions from a technical viewpoint JET could be run for another decade or more during ITER construction JET could lead developments for remote users the Be and Tritium capability could be preserved staff could gain experience of working under an ITER-like safety regime staff from all 6 ITER parties could be trained in the use and operation of a large facility 21