NSTX Team Meeting

1. NSTX-U Supported by NSTX Team Meeting Culham Sci Ctr U St. Andrews York U Chubu U Fukui U Hiroshima U Hyogo U Kyoto U Kyushu U Kyushu Tokai U NIFS Niigata U U Tokyo JAEA Hebrew U Ioffe Inst RRC Kurchatov Inst TRINITI NFRI KAIST POSTECH Seoul National U ASIPP ENEA, Frascati CEA, Cadarache IPP, Jülich IPP, Garching ASCR, Czech Rep Columbia U CompX General Atomics FIU INL Johns Hopkins U LANL LLNL Lodestar MIT Nova Photonics New York U ORNL PPPL Princeton U Purdue U SNL Think Tank, Inc. UC Davis UC Irvine UCLA UCSD U Colorado U Illinois U Maryland U Rochester U Washington U Wisconsin Masa Ono June 26, 2012

2. NSTX Team Meeting Agenda Time: 1:30 ~ 3:00, June 26, 2012 Place: LSB 318, PPPL • General Items (25 minutes) • Program Items (25 minutes) • Engineering Operations Update (10 minutes) • Research Operations Update (10 minutes) • NSTX Upgrade Project Update (20 minutes)

3. Safely, Safely, Safely • ES&H Issues (J. Levine) • A serious injury resulted in the Skid Steer Loader Incident. http://www-local.pppl.gov/esh/Special%20Reports/Skid%20Steer%20CAP%20Rev%201.pdf . • From May 10-16, 2012, PPPL conducted a web-based survey on safety culture. • Safety Forum was held on May 16, 2012: The presentations can also be downloaded from there or from the ESH&S website Safety Forums tab at  http://www-local.pppl.gov/esh/SafetyForum.htm.

4. 2012 PPPL Safety Culture Survey Analysis and Interpretation Thanks for your participation! • Executive Summary • Perceived Safety Culture Strengths • A questioning attitude is encouraged • Safety undergoes constant examination • Behavior changes are motivated by consequences • Perceived Safety Culture Weaknesses • Human Performance Improvement (HPI) concepts are not used • Communication is ineffective • Decision-making does not prioritize safety • NSTX team response summary: • Somewhat low buy-in to safety program. • Attention to safety on the job is low despite clear directions, few distractions, stable work load, ease of compliance with safety rules, etc. • Believe emphasis on safety is about what it should be and that group is as safe as others at PPPL.

5. Liquid lithium safety and the SNL accident • On August 26, 2011 a failure in the lithium circulation system (the Liquid Metal Integrated Test system, or LIMITS) within the SNL Plasma Material Test Facility (PMTF) allowed mixing of liquid lithium and a water/propylene glycol mixture within the LIMITS vacuum chamber

6. Lithium Safety Assessment for NSTX-U Liquid lithium contact with water must be prevented • Based on the discussions, it appears that because of design and engineering features and inventory limits, lithium work in LTX, NSTX and T260 does not have the potential for an explosive event similar to the one that took place at Sandia. • However, the following potential issues were raised for future lithium activities on NSTX-U: • Need to consider the potential for and consequences of a major magnet arc to the NSTX vacuum vessel that could breach the vacuum boundary and possibly put in-vessel lithium in contact with water leaking/spraying from a failed coil. • Need to consider the potential for and consequences of a water leak inside an NSTX neutral beam box that might come in contact with lithium. • Items 1 & 2 need to be addressed in the forthcoming Safety Assessment Document (SAD) for the NSTX-U and will be reviewed by the NSTX Activity Certification Committee (ACC). • Near term – LITER, dropper, slapper are likely to be ok due to the relatively modest inventory level. • Longer term – Possible flowing liquid lithium system with significant volume will require careful safety assessment.

7. NSTX FY 2014 FWP Budget Base (Presidential) Budget is Highly Constrained • The presidential base plan is $6.6M lower for FY 2013 and $8.1M lower for FY2014 compared to the CD-2 NSTX National Program budget profile. • NSTX-U Project has the highest priority and funded largely from the base program. However, the presidential budget reduction directly impacts the upgrade construction. • Under the base plan, NSTX-U Project completion is April 2015, one year later than the present target date. • Working with DOE to minimize the schedule impact. • The senate budget is at Presidential level but the House budget restores the fusion base funding and add $25M to ITER. • At moment, NSTX-U Project is progressing at full speed for the critical path work scopes preserving the April 2014 early finish.

8. Six NSTX Experimental Researchers Retired We thank them their valuable contributions for NSTX Ernesto Mazzucato Dennis Mansfield Henry Kugel King-Lap Wong Manfred Bitter Michael Bell

9. Present NSTX-U Organization NSTX Upgrade Project under the Engineering Department Run Coordination (position not active during NSTX Upgrade outage) NSTX Upgrade Department Project Director Masayuki Ono Program Director Jon Menard Deputy: Stan Kaye * ORNL ** Columbia University *** Nova Photonics # Univ. of Washington ## LLNL Topical Science Groups Advanced Scenarios and Control S. Gerhardt, E. Kolemen Engineering Ops Al von Halle Project Engineer Charles Neumeyer Experimental Research Ops Masayuki Ono (acting) Physics Analysis Stan Kaye Boundary Physics V. Soukhanovskii##, A. Diallo Theory: C.-S. Chang Publications & Presentations Physics Operations D. Mueller Device Operation A. von Halle Cross-cutting and ITER Needs J. Menard, R. Maingi* Theory/Modeling: J. Canik* Computation & Collaboration S. Kaye (acting) B. Davis Heating Systems T. Stevenson RF Systems J. Hosea Lithium Research C. Skinner, M. Jaworski Theory: D. Stotler Auxiliary Systems W. Blanchard Diagnostic Development B. Stratton Macroscopic Stability J.-K. Park, J. Berkery** Theory: A. Boozer** Theory & Simulation N. Gorelenkov (acting) Power Systems J. Lacenere Solenoid-free start-up & ramp-up R. Raman#, D. Mueller Theory: S. Jardin Diagnostic Ops R. Kaita Central I&C P. Sichta Transport and Turbulence Y. Ren, W. Guttenfelder Theory: G. Hammett Boundary Physics Operations R. Kaita (acting) Construction E. Perry Waves and Energetic Particles G. Taylor, M. Podestá Theory: N. Gorelenkov NSTX-U Organization – 2012

10. Snowflake Power Divertor received the 2012 R&D 100 Award!Congratulations to Vlad, Jon, Joon-wook, and Egemen! THE DEPARTMENT OF ENERGY Office of Public Affairs http://science.energy.gov/~/media/_/pdf/news/in-the-news/2012/rd100_2012.pdf • Lawrence Livermore National Laboratory • Snowflake Power Divertor, developed with Princeton Plasma Physics Laboratory and the Center for Research in Plasma Physics: A major scientific and technological hurdle for fusion energy is to devise a technique so that materials can withstand the huge flux of heat that emanates from the reactor core. The snowflake divertor, which was demonstrated in two experimental fusion facilities, including the National Spherical Torus Experiment, offers the potential to solve this problem, or at least reduce the heat flux by such an extent that the remaining materials challenge is tractable.

11. Collaboration with QUEST Newest ST in Japan: All metal PFCs, non-inductive long pulse Hot spot developed ECH sustained discharge Future Direction: • Higher power ECH (8.5 GHz, 28 GHz) Total power ~ 1 MW long pulse • Hot wall for particle control • All metal CHI being considered U. Washington / NSTX collaboration Radiation Shield Hot spot 8.2 GHz, ~ 100 kW Heater Hot wall (up to 500 °C) planned for 2014 Cooling panel Water cooled tungsten movable limiter Melted moly limiter Thermal Isolator Hot wall Vacuum Vessel

12. Collaboration with Gamma-10 Group New PMI research direction and 28 GHz Gyrotron R&D Targeted heat-flux level ITER relevant level ECH Power limit • 28GHz Gyrotron is required in GAMM10 • This Gyrotron will be used to achieve higher plasma performance. • Ex) axial ion confining potential, heats electrons, heat flux • 28GHzGyrotrons are required in some plasma experimental devices. • • NSTX (Princeton University ): 2MW – several seconds • Ex) ECH, ECCD, EBW experiment etc. • Improved design of 28GHz 1MW Gyrotron for development of 2MW Gyrotron

13. Have a Fun but Safe Summer! • For PPPL researchers, the vacation carry over limit through the fiscal boundary (Sept 30, 2012) will be reduced by six days this year so please plan your vacation accordingly. • Our safety is equally important on site and off site. • Our home is often the most hazardous place for family particularly for men.