Fusion Science and Technology VOLUME 72 · NUMBER 3 · OCTOBER 2017 Selected papers from the Twenty-Second Topical Meeting on the Technology of Fusion Energy—Part 1 August 21–25, 2016, Philadelphia, Pennsylvania Contents vii Preface Adam Cohen, Arnie Kellman, Susana Reyes TECHNICAL PAPERS 199 Current Status of Large Helical Device and Its Prospect for Deuterium Experiment M. Osakabe, Y. Takeiri, T. Morisaki, G. Motojima, K. Ogawa, M. Isobe, M. Tanaka, S. Murakami, A. Shimizu, K. Nagaoka, H. Takahashi, K. Nagasaki, H. Takahashi, T. Fujita, Y. Oya, M. Sakamoto, Y. Ueda, T. Akiyama, H. Kasahara, S Sakakibara, R. Sakamoto, M. Tokitani, H. Yamada, M. Yokoyama, Y. Yoshimura, LHD Experiment Group 211 The Challenges of Plasma Material Interactions in Nuclear Fusion Devices and Potential Solutions J. Rapp 222 Progress in the U.S./Japan PHENIX Project for the Technological Assessment of Plasma Facing Components for DEMO Reactors Yutai Katoh, Daniel Clark, Yoshio Ueda, Yuji Hatano, Minami Yoda, Adrian S. Sabau, Takehiko Yokomine, Lauren M. Garrison, J. Wilna Geringer, Akira Hasegawa, Tatsuya Hinoki, Masashi Shimada, Dean Buchenauer, Yasuhisa Oya, Takeo Muroga 233 Recent R&D Results on Fusion Nuclear Technology for ITER and DEMO Reactor in Japan Toshihiko Yamanishi, Norikiyo Koizumi, Masataka Nakahira, Yoshihiko Nunoya, Satoshi Suzuki, Hiroyuki Tobari, Mieko Kashiwagi, Takaaki Isono, Takashi Inoue, Makoto Sugimoto, Yoshinori Kusama, Yoshinori Kawamura, Hiroyasu Tanigawa, Masaru Nakamichi, Takashi Nozawa, Tsuyoshi Hoshino, Yoshio Ueda, Yuji Hatano, Takeo Muroga, Satoshi Fukada 242 Examples of What Fusion Energy Can Contribute to the Near Term Needs of Society Before We Build the First Fusion Power Plant G. L. Kulcinski, J. F. Santarius 248 An Improved Near Term 14 MeV Neutron Test Facility for Fusion Power Plant Materials G. L. Kulcinski, Ross F. Radel, Andrew Davis 255 Study on the Thermally-Induced Stress and Relaxation of Ceramic Breeder Pebble Beds Mahmoud Lotfy, Alice Ying, Mohamed Abdou, Yi-Hyun Park, Seungyon Cho —continued— i ii Contents continued VOLUME 72 · NUMBER 3 · OCTOBER 2017 263 Transient Hot-Wire Experimental System for Measuring the Effective Thermal Conductivity of a Ceramic Breeder Pebble Bed Christopher Kang, Yi-Hyun Park, Jon T. Van Lew, Alice Ying, Mohamed Abdou, Seungyon Cho 271 Parametric Thermal and Flow Analysis of ITER Diagnostic Shield Module A. Khodak, Y. Zhai, W. Wang, R. Feder, G. Loesser, D. Johnson 278 Computational Investigation of the Thermal-Hydraulic Performance for Twisted Tape Enabled High Heat Flux Components E. Clark, A. Lumsdaine, K. Ekici, A. Ruggles 285 Overview of Thermal Hydraulics of Helium-Cooled Solid Divertors M. Yoda, S. I. Abdel-Khalik 294 An Experimental Investigation of the Effect of Jet-to-Surface Distance on the Thermal Hydraulics of the Helium-Cooled Modular Divertor with Multiple Jets B. Zhao, S. A. Musa, S. I. Abdel-Khalik, M. Yoda 300 Optimization of Multiple Jet Arrays for Helium-Cooled Finger-Type Divertors B. Zhao, S. A. Musa, S. I. Abdel-Khalik, M. Yoda 306 Reversed Heat Flux Study of Impinging-Jet Water Cooling for Helium-Cooled Finger-Type Divertors S. A. Musa, B. Zhao, S. I. Abdel-Khalik, M. Yoda 312 Analysis of the ITER ECH Waveguide Transmission Line Expansion Unit Claire Luttrell, Ethan Coffey, Ira Griffith, Greg Hanson, Arnold Lumsdaine, Chuck Schaich 318 Design and Commissioning of a Three-Barrel Shattered Pellet Injector for DIII-D Disruption Mitigation Studies S. Meitner, L. R. Baylor, N. Commaux, D. Shiraki, S. Combs, T. Bjorholm, T. Ha, W. McGinnis 324 ITER ECH Switch Design and Analysis Dennis L. Youchison, Alex M. Melin, Arnold Lumsdaine, Charles R. Schaich, Gregory R. Hanson 331 Design, Analysis, and Testing of a Hot Calibration Source for the ITER-ECE Diagnostic System A. Ouroua, J. H. Beno, A. Bryant, D. Weeks, P. Phillips, W. L. Rowan —continued— FUSION SCIENCE AND TECHNOLOGY · VOLUME 72 · OCTOBER 2017 iii Contents continued VOLUME 72 · NUMBER 3 · OCTOBER 2017 337 Characterization of He-Induced Bubble Formation in Tungsten due to Exposure from an Electron Cyclotron Resonance Plasma Source D. Donovan, D. Buchenauer, J. Whaley, G. Wright, C. M. Parish, X. Hu 347 Design Approach for FESS-FNSF In-Vessel Components and Constraints Imposed On Radial/ Vertical Build Definition L. El-Guebaly, M. Elias, B. Madani, C. Martin, E. Marriott, FESS-FNSF Team 354 ST-Based Fusion Nuclear Science Facility: Breeding Issues and Challenges of Protecting HTS Magnets L. El-Guebaly, M. Harb, A. Davis, J. Menard, T. Brown 362 Lead Benchmark Experiment with DT Neutrons at JAEA/FNS Saerom Kwon, Masayuki Ohta, Satoshi Sato, Chikara Konno, Kentaro Ochiai 368 Analysis of Radiation Transport due to Activated Coolant in the ITER Neutral Beam Injection Cell Katherine Royston, Stephen Wilson, Joel Risner, Ahmad Ibrahim, Michael Loughlin 374 Experiment to Recover Tritium from Li-Pb Blanket and Understanding Chemistry of the Li17Pb83–H System Satoshi Fukada, Mao Kinjyo, Takuji Oda, Terunori Nishikawa, Kadzunari Katayama 382 Thermal Design Investigation for a Flinabe Blanket System Hiroki Shishido, Noritaka Yusa, Hidetoshi Hashizume, Yoshiki Ishii, Norikazu Ohtori 389 Japanese Fusion Materials Development Path to DEMO Takeo Muroga, Hiroyasu Tanigawa 398 Fatigue Properties of SiC/SiC Composites Under Various Loading Modes Shuhei Nogami, Takashi Nozawa, Daichi Kawai, Wenhai Guan, Akira Hasegawa 404 Gas Gun Model and Comparison to Experimental Performance of Pipe Guns Operating with Light Propellant Gases and Large Cryogenic Pellets S. K. Combs, J. R. Reed, M. S. Lyttle, L. R. Baylor, J. R. Carmichael, T. E. Gebhart, S. J. Meitner, D. A. Rasmussen 416 Characterization of Tritium Isotopic Permeation Through ARAA in Diffusion Limited and Surface Limited Regimes Hongjie Zhang, Alice Ying, Mohamed Abdou, Masashi Shimada, Bob Pawelko, Seungyon Cho —continued— FUSION SCIENCE AND TECHNOLOGY · VOLUME 72 · OCTOBER 2017 iv Contents continued VOLUME 72 · NUMBER 3 · OCTOBER 2017 426 Performance Testing of a Prototype Pd-Ag Diffuser Gregg A. Morgan, Brittany J. Hodge, Anita S. Poore 434 Numerical Stress Analysis During Cooldown and Compressive Loading in an Imperfect Nb3Sn Wire Luc d’Hauthuille, Yuhu Zhai 439 Quench Propagation in a TF Coil of the EU DEMO L. Savoldi, R. Bonifetto, A. Brighenti, V. Corato, L. Muzzi, S. Turtu’, R. Zanino, A. Zappatore 449 Expanding Operational Space in Inertial Electrostatic Confinement D-D Neutron Generators Matt K. Michalak, Aaron N. Fancher, Gerald L. Kulcinski, John F. Santarius 455 Identification of Landmines and IEDs Using Compact Fusion Neutron Sources on Drones G. L. Kulcinski, J. F. Santarius, K. Johnson, A. Megahed, R. L. Bonomo TECHNICAL NOTES 461 Historical Fission Plant Availability and the Operation Goal for a Fusion DEMO Lee C. Cadwallader 469 Reducing the Peak-to-Average-Power-Ratio in Fusion Blankets Marco Riva, Christian Di Sanzo, Mohamed Abdou, Mahmoud Youssef 478 Modeling of Electromagnetic Loads on DEMO First Stage Divertor Valter Cocilovo, Giuseppe Ramogida 483 Progress in the Development of a Double Stub Tuner for Alcator C-Mod Lower Hybrid Current Drive System P. Koert, D. Terry, E. Fitzgerald, S. Wukitch 488 Recent Upgrades of the DIII-D Impurity Granule Injector M. S. Vorenkamp, A. Nagy, A. Bortolon, R. Lunsford, R. Maingi, D. K. Mansfield, A. L. Roquemore 496 Design and Preliminary Results of Matching Network for MW Scale High Current RF Ion Source Caichao Jiang, Chundong Hu, Yahong Xie, Yongjian Xu, Shiyong Chen, Qinglong Cui, Yuanzhe Zhao, Yuanlai Xie —continued— FUSION SCIENCE AND TECHNOLOGY · VOLUME 72 · OCTOBER 2017 v Contents continued VOLUME 72 · NUMBER 3 · OCTOBER 2017 500 Upgrade to DIII-D National Fusion Facility PCS and Neutral Beam Systems: In-Shot Variation of Neutral Beam Particle Energy J. Rauch, D. C. Pace, B. Crowley, R. D. Johnson, D. H. Kellman, C. J. Pawley, J. T. Scoville 505 Update on Cooling for the ITER ECH Waveguide Transmission Line Ethan Coffey, Greg Hanson, David Hill, Timothy Jones, Arnold Lumsdaine, Claire Luttrell, Chuck Schaich 510 3-D Neutronics Assessment of Tritium Breeding Capacity and Shielding of Tokamak-Based Fusion Nuclear Science Facility M. Harb, L. El-Guebaly, A. Davis, P. Wilson, E. Marriott, J. Benzaquen, FESS-FNSF Team 516 Demonstration of Passive Tritium Oxidation Using a Hydrophobic Catalytic Recombiner for Detritiation System Yasunori Iwai, Yuki Edao, Katsumi Sato 523 HIP Joining of Tungsten Armor to Ferritic-Martensitic Steel with a Zirconium Interlayer Yang-Il Jung, Hyun-Gil Kim, Dong-Won Lee, Yoon-Soo Lim, Seungyon Cho 530 Ultrasonic Doppler Velocimetry Experiment of Lead-Lithium Flow with Oroshhi-2 Loop Yoshitaka Ueki, Yuya Noguchi, Juro Yagi, Teruya Tanaka, Takehiko Yokomine, Masaru Hirabayashi, Kuniaki Ara, Tomoaki Kunugi, Akio Sagara FUSION SCIENCE AND TECHNOLOGY · VOLUME 72 · OCTOBER 2017.