Atomic Dynamics and Phase distribution Anomalous Thermodynamic study for U-Zr-metallic Behavior of Novel Compounds simfuel Bi-monthly • May - June • 2016 ISSN: 0976-2108 N E W S L E T T E R CONTENTS BARC developsControl Systems of Ship Borne Terminal for Editorial Committee The Indian Space programme 1 Chairman Development of 50kW, 2-3kHz Induction Dr. G.K. Dey Heating Inverter for WIP, Trombay Materials Group 2 Editor Development & Deployment of Dr. G. Ravi Kumar BARC Vessel Inspection System SIRD (BARVIS) for TAPS-1&2 3 Members Atomic Dynamics and Anomalous Dr. G. Rami Reddy, RSD Thermodynamic Behavior of Dr. A.K. Tyagi, Chemistry Divn. Novel Compounds 12 Dr. S. Kannan, FCD Dr. C.P. Kaushik, WMD Phase distribution study for Dr. S. Mukhopadhyay, U-Zr-metallic simfuel Seismology Divn. 17 Dr. S.M. Yusuf, SSPD Dr. B.K. Sapra, RP&AD Indigenous technology development: Dr. J.B. Singh, MMD Seismic Switch for Nuclear Reactors Dr. S.K. Sandur, RB&HSD 24 Dr. R. Mittal, SSPD Dr. Smt. S. Mukhopadhyay, ChED TAFICS Theme Meeting on I&C Security Program For Nuclear Facilities 28 Thirty First Training Course on Basic Radiological Safety and Regulatory Measures for Nuclear Facilities” 30 Technology Transfer to Industries 31 60th DAE Solid State Physics Symposium-2015 (Diamond Jubilee Year) 36 National Technology Day 2016 37 BARC Training School Graduation of the 59th batch of OCES and 12th batch of OCDF trainees 39 Scientists Honoured 41 Brief Communication BARC develops Control Systems of Ship Borne Terminal for The Indian Space programme RCnD, BARC has recently completed the design and remote high seas where future manned reentry and fabrication of the Servo controller and 3 axis drivesfor recovery capsules might land. Also TTC terminals the 4.6 mShip-borne terminal to be deployed in support located at strategic high sea locations are critical so as to of ISRO's launch and recovery missions. This would provide an uninterrupted coverage and backup during now be subjected to further integration, trials and launches. qualification tests at ECIL. This indigenous development is being carried-out by ISRO Telemetry Tracking and Command Network BARC and ECIL in the framework of a contract by provides TTC (Telemetry, Tracking and Control) ISTRAC/ ISRO on ECIL. support for Launch Vehicles and Spacecrafts for all ISRO The unit is undergoingintegration, functional and missions. BARC and ECIL are developing this qualification tests on an indigenously developed single axis ship motion simulator. ISRO is expected todeploy several more SBTs in future. RCnD, BARC is responsible for the development of the three axis gimbals, controller electronics and the motor drives. BARC has also designedthe drive unit for the rapid deployment tilting mechanism and interlocks for the SBT. Earlier, BARC in association with ECIL had successfully developed a variety of antenna pedestals and controllersof various sizes for ground station applications for tracking satellites and RPVs. India's first deep space network terminal –the 32 metre antenna- which was deployed for the Indian moon and mars missions was developed by ECIL in collaboration with BARC. Fig. 2: Three axis pedestal without reflector Fig. 1: Antenna Control and Drive Unit Cabinet indigenous ship borne antenna terminal (SBT) to support ISRO missions which include tracking of re- entry vehicles for future Indian manned missions to space. This 4.6m ship-borne terminal is capable of continuously pointing at the commanded angles and mono-pulse tracking even in the presence of ship's rocking movements.The antenna is actively stabilized against ship movements by the use of an Inertial Measurement Unit. The SBT is mounted on a rugged chassis which is designed to be easily transported in standard ISO shipping containers. The reflector of the SBT can be quickly disassembled and the SBT can be folded down automatically for swift relocation and redeployment. TheSBTtechnology is crucial as it extends the TTC capability to be provided even in the BARC Newsletter | May-June 2016 | 1 Brief Communication Development of 50kW, 2-3kHz Induction Heating Inverter for WIP, Trombay R.K. Sadhu, B. Maurya and B.M. Barapatre ATSS, E&I Group Induction Heating Inverters are required for five-zone After satisfactory Factory Acceptance Tests (FAT) at induction furnace of Waste Immobilization Plant ECIL, ten units of these inverters have been delivered to (WIP), Trombay; used for nuclear waste immobilization WIP, Trombay. through vitrification process under Indian Nuclear Waste Management Programme. The electrical power to each zone is supplied by individual 50kW, 2-3kHz Induction Heating Inverter. This inverter has been designed by Advanced Technology Systems Section (ATSS), E&I Group, BARC and mass-produced at ECIL, Hyderabad. Involving ECIL in mass-production of these inverters would serve long-term strategic requirements of Indian Nuclear Waste Management Programme including maintenance for their operating-life. Induction Furnace Heating (~925°C) Primary (yellow) & Load (green) Current 50kW Induction Heating Inverter SCR based half-bridge inverter configuration having 3- phase diode rectifier at its front end and current transformer at rear end is used in these inverters for DC to AC conversion; resulting most reliable system. These are designed with state-of-art technology and with all relevant control & protections required for such power electronics systems. All major heat-generating components (e.g. diode-bridge, DC filter capacitor, commutation capacitor & choke, inverter SCR & diode, current transformer etc.) of these inverters are water- cooled; resulting very compact packaging. Load (pink) & DC-bus (green) Voltage BARC Newsletter | May-June 2016 | 2 Development & Deployment of BARC Vessel Inspection System (BARVIS) for TAPS-1&2 Jit Pal Singh, R. Ranjon, M.P. Kulkarni and N.L. Soni Refuelling Technology Division R.J. Patel Reactor Design & Development Group Introduction TAPS 1&2 are oldest operating plants built in 1960s. Assessment of RPV structural integrity is most important for ageing management and relicensing to extend safe operation of the reactor. RPV is comprised of shells and removable top head with flange & bottom head which is welded to shell and multiple nozzles & penetrations. Cylindrical vessel is made of three cylindrical shell courses each shell course has two longitudinal welds and then each shell course is joined together by circumferential welds. Shells are made of low alloy steel and cladded with 5.56mm (7/32 inch) thick austenitic steel. Vessel internal diameter is 3657.6 mm (144 inch). It has total six longitudinal welds and four circumferential welds as shown in Fig. 1. The vessel welds are to be inspected periodically as part of regulatory requirement. Manipulators for inspecting welds from ID surface of RPV for Boiling Water Reactors (BWR) have been developed in past by GE for inspection - system GERIS 2000 [1] and RPV-Inner Diameter (ID) scanner [2]. These manipulators are big in size and provide circumferential and longitudinal scanning movements to the probes independent to the fuelling bridge. During weld inspection of RPV of TAPS- 1&2, drier and separator assemblies are removed from the RPV top shell. As a result upper shell welds L1-1, L1-2 and their junctions with C1 become accessible for inspection from ID side. A simple and compact size Weld Inspection Manipulator [3] has been used for upper shell welds inspection at TAPS-1&2. Inspection of middle shell (beltline region) welds is extremely difficult. Direct accessibility of welds from ID is hindered by core internals (thermal skirt, sparger, core spray sparger pipes etc) as shown in Fig. 2. C2 weld is located behind the thermal skirt which is not accessible from ID. However, beltline longitudinal (L2-1, L2-2 welds and their junction with C3) welds are accessible through a limited annular gap of 25 mm between RPV wall and thermal shield. Core spray sparger pipes makes the task more challengingThe as individual the location locations of L2-1 for & storing L2-2 weldsvitrified are HLW at SSSF, TarapurFig. 1: Schematic of Reactor Pressure Vessel BARC Newsletter | May-June 2016 | 3 exactly behind these pipes. Newer generation of BWRs have location on the core shroud is fixed by pin guided in to the more gaps between RPV wall and thermal shield and are hole in the bracket welded to core shroud similar to dryer & designed considering In-Service Inspection of RPV [2]. separator assembly and takes lateral support from the Inspection of RPV beltline regions welds of BWR/1which separator guide rod which is fixed to the RPV. Manipulator is have very small annular gap from ID is not attempted further clamped to guide rod by cylinder actuated grip named worldwide. here as monkey grip. For covering weld inspection from both side of the centre line of the welds and Heat Affected Zone (HAZ), probe holder associated with chain drive assembly is swung to avoid core spray pipe obstruction. After inspection of first weld, manipulator is picked up by grappler and is installed at other similar weld location (180⁰ opposite to first weld) on the top of core shroud. Manipulator provides continuous vertical movement of 4000mm (speed 25 mm/s) which covers up to C3 weld junction, indexed cross travel of 500mm at top and 80mm cross travel at probes for scanning/cleaning weld joint and HAZ. Vertical movement to the probes/brush is provided by push pull chain. Circumferential/cross movement is provided by lead screw & nut. Indexed cross movement is restricted by separator guide rod in one side (only150 mm travel from centre of weld) and obstructed by core spray pipe on other side. To avoid obstruction, the probe holder/brush is provided with swinging movement. After clearing obstruction, further cross movement of 250 mm in other side of the centre of weld is available. This cross movement is sufficient to scan the full weld and HAZ.