Verification Test Results Research Articles

1A2-B06 トルク制御を利用した大型構造体(ITERブランケット)の交換試験

Blanket modules are installed on two keys that are part of the vacuum vessel (VV). Blanket maintenance requires the remote manipulation of the four-ton modules and final installation accuracy is within 0.5 mm between the module and the two key supports in the VV. The most critical issue is to avoid any jamming between the blanket module and the keys as a result of excessive loading during the module installation process, To solve this technical issue, this paper describes a verification test results of control method to avoid any jamming.

Evaluation of Finger-jointed Laminae for Glulam Timber by Acousitic Emission II Development of Evaluation System for Finger-jointed Laminae with Starved Joints

The laminae that comprise glulam timber are generally finger–jointed. However, laminae with starved joints in the finger–joint are occasionally found in the manufacture of glulam timber, and greatly decrease the timbers’ strength. Therefore, for the manufacture of glulam timber with good strength properties, the evaluation of finger–joint properties after finger–jointing is important, and the method is hoped to be simple and non–destructive. In our previous studies, we paid attention to acoustic emission (AE) as a non–destructive method, and bending test for finger–joint laminae with starved joints was performed. We clarified that AE generated during the bending test was promising for the detection of starved joints in the finger–joint at the early stage of the bending test. In addition, it became clear that the position of starved joints in finger–joint could be presumed by one– dimensional method of using AE signal (Ohuchi et al., 2004: Yano et al., 2007). Furthermore, in consideration of installing the AE monitoring method into the production line of the finger–joint laminae, a special attachment (jig) for the AE sensor installed into the production line was developed. From the result of verification test with the jig, it was clear that the possibility of the detection of the starved joints by AE as a non–destructive method was suggested in the case of loading to the finger–jointed part of laminae in 4 kN as the detection load with the jig (Ohuchi et al., 2009). However, it was pointed out that this method with the jig was not efficient for the following two reasons; first, it is difficult to set the position of the jig beforehand because neither the position nor the number of finger–joint parts in the laminae is decided. Secondly, it is necessary to stop the production line for the bending process. In this study, the main objective was to develop the evaluation method for detecting of the laminae with starved joints without stopping the production line regardless of both the position and the number of finger– joint parts in the laminae. In this report, the new type attachment (jig) which installed the AE sensor as non– destructive method for the detection of the laminae with starved joints is designed, and the evaluation tests of finger–jointed laminae were conducted by using this jig. That is, the evaluation system which installed the new Evaluation of Finger–jointed Laminae for Glulam Timber by Acoustic Emission II Development of Evaluation System for Finger–jointed Laminae with Starved Joints

A NUMERICAL ALGORITHM FOR MODELING MULTIGROUP NEUTRINO-RADIATION HYDRODYNAMICS IN TWO SPATIAL DIMENSIONS

It is now generally agreed that multidimensional, multigroup, neutrino-radiation hydrodynamics (RHD) is an indispensable element of any realistic model of stellar-core collapse, core-collapse supernovae, and proto-neutron star instabilities. We have developed a new, two-dimensional, multigroup algorithm that can model neutrino-RHD flows in core-collapse supernovae. Our algorithm uses an approach similar to the ZEUS family of algorithms, originally developed by Stone and Norman. However, this completely new implementation extends that previous work in three significant ways: first, we incorporate multispecies, multigroup RHD in a flux-limited-diffusion approximation. Our approach is capable of modeling pair-coupled neutrino-RHD, and includes effects of Pauli blocking in the collision integrals. Blocking gives rise to nonlinearities in the discretized radiation-transport equations, which we evolve implicitly in time. We employ parallelized Newton-Krylov methods to obtain a solution of these nonlinear, implicit equations. Our second major extension to the ZEUS algorithm is the inclusion of an electron conservation equation that describes the evolution of electron-number density in the hydrodynamic flow. This permits calculating deleptonization of a stellar core. Our third extension modifies the hydrodynamics algorithm to accommodate realistic, complex equations of state, including those having nonconvex behavior. In this paper, we present a description of our complete algorithm, giving sufficient details to allow others to implement, reproduce, and extend our work. Finite-differencing details are presented in appendices. We also discuss implementation of this algorithm on state-of-the-art, parallel-computing architectures. Finally, we present results of verification tests that demonstrate the numerical accuracy of this algorithm on diverse hydrodynamic, gravitational, radiation-transport, and RHD sample problems. We believe our methods to be of general use in a variety of model settings where radiation transport or RHD is important. Extension of this work to three spatial dimensions is straightforward.

レーザ外面照射応力改善法(L-SIP)の開発と適用

Outer Surface Irradiated Laser Stress Improvement Process (L-SIP) was developed as a counter measure for stress corrosion cracking at the tube and nozzle stub weld in the nuclear power plant and the thermal power plant. L-SIP is a technique for improving the inside tensile residual stress to the compressive stress. Rapidly heating by the laser beam irradiation to outer surface causes the temperature difference between outer surface and inner surface, and it can reduce the residual stress. In this paper, the developed system, the verification test results and the practical use situation are described.

Development of 1100 kV a.c. high‐performance GIS‐arrester and its verification tests

AbstractFor the purpose of realizing 1100 kV a.c. power transmission system to meet the demands for electricity in future Japan, the 1100 kV a.c. high performance gas‐insulated metal enclosed arrester (GIS‐arrester) was developed and its high reliability was confirmed by a long‐term performance verification test. The high‐peformance GIS‐arrester is a key component to determine the insulation level of 1100 kV a.c. power transmission systems and substation equipments. As part of a series of activities started around 1975 by the Special Committee on 1100 kV a.c. Power‐Transmission system, the high‐performance GIS‐arrester with the superior protective performance of the world highest level was developed by applying the ZnO elements developed and commercialized in Japan.This paper introduces the application effects, duties, specifications, progress of development, and results of verification tests for the high‐performance GIS‐arresters for 1100 kV a.c. power transmission system. Copyright © 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

A Verification Test Result of Isolated Operation of a Microgrid Configured with New Energy Generators and a Study of Improvement of Voltage Control

Verification test result of isolated operation of a microgird configured with some new energy generators on Aichi EXPO. 2005 showed stable controllability without rotating machine. However, improvement of voltage fluctuation with changing reactive power of loads had been hoped. Some improvements of system voltage control had been implemented on the maicrogrid moved to Central Japan Airport City. This paper presents a verification test result of the improvement of voltage fluctuation in isolated operation with PAFC output power compensation control by NaS batteries and also presents a simulation study of a further improvement of voltage control strategies of PAFC inverters.

Status and verification of edge plasma turbulence code BOUT

The BOUT code is a detailed numerical model of tokamak edge turbulence based on collisional plasma fluid equations. BOUT solves for time evolution of plasma fluid variables: plasma density N i , parallel ion velocity V ‖ i , electron temperature T e , ion temperature T i , electric potential ϕ, parallel current j ‖ , and parallel vector potential A ‖ , in realistic 3D divertor tokamak geometry. The current status of the code, physics model, algorithms, and implementation is described. Results of verification testing are presented along with illustrative applications to tokamak edge turbulence.

Development of an advanced PWR fuel for OPR1000s in Korea

The advanced PWR fuel for the OPR1000s in Korea, PLUS7, has been developed to enhance thermal performance, high burnup capability and fuel reliability against grid-to-rod fretting wear and debris. The outstanding design features of PLUS7 include mixing vane mid-grids for increasing thermal performance and minimizing vibration-induced fretting wear, optimized fuel dimensions and advanced zirconium alloys for high burnup capability of 72,000 MWD/MTU, and an optimized fuel rod diameter for reducing pressure drop and improving neutron economy. The fuel assembly and its components performances have been verified through a wide spectrum of mechanical, thermal hydraulic, vibration and fretting wear tests. Based on the verification test results and the evaluations with the help of the KNF design code system, it is found that the PLUS7 fuel will maintain its integrity up to the envisaged burnup of 72,000 MWD/MTU. In addition, the PLUS7 fuel performances were evaluated to be considerably improved in comparison with the current fuel used in the OPR1000s.

逆流雷による配電用柱上変圧器の被害メカニズムと低圧配電線で実施する対策

Pole-mounted transformer is one of the equipment that is easier to receive lightning damage. As our information society advances, the needs for supply reliability of electric power become higher, and the decreasing of lightning damages of pole-mounted transformers becomes necessary. In recent years, lightning protective devices (surge arresters) have been installed around the primary bushing of the transformers. Therefore, the number of disconnections around the primary bushing caused by lightning has been decreasing. However, the surge arrester that installed at the primary side of transformer cannot protect the transformer against backflow lightning that invades to the secondary side of transformer. The characteristic of the transformer damage by the backflow lightning is that electro-magnetic force occurring by the current flowing into the secondary side of transformer deforms the windings of the transformer. In this paper, the mechanism of transformer damage by the current flowing into the secondary side is clarified by the comparison between actual lightning damage case and the results of verification test using short-circuit generator. Effective counter measures against the damage of transformer by the backflow lightning are examined by EMTP calculations. From the calculation results, neutral grounding on low-voltage distribution line is the most effective measures in the point of decreasing of the amount of current flowing into the transformer. The less the grounding resistance, the less the amount of current flowing into the transformer. Moreover, decreasing the voltage of the secondary-side of the transformer is important to protect the bushing of the secondary-side. By the calculation result, it is clarified that the surge arresters installed around the secondary side of the transformer are effective for decreasing the voltage of the secondary side of the transformer.

階段状電流を用いた鉛蓄電池シミュレーションモデリング手法

This paper proposes a new simulation model of lead-acid battery characteristics and a modeling method using step changing current. Battery simulation model is necessary to simulate the photovoltaic systems with batteries. The proposed model considers the nonlinearity of internal resistance and includes 36 constants that can be determined by only 4 cycles of charge/discharge test. This paper clearly reports the measuring method and the modeling procedure of the battery characteristics. The result of verification test using charge/discharge pattern that assumes the photovoltaic system shows 1.0% of mean absolute error ratio of simulated power at 17deg C and 32deg C of battery temperature.

SIMM: An integrated forecasting system for the Mediterranean area

AbstractMany ‘high‐impact’ meteorological, marine and hydrological events in the Mediterranean area are characterized by horizontal spatial scales of the order of 10–100 km. Such events are, sometimes, driven by complex dynamical processes involving planetary scale atmospheric flows. Several international programs (ALPEX, POEM, MAP, PYREX, MEDEX) have improved the understanding of some of these processes. However, because of the Mediterranean's geomorphological structure, characterized by mountain chains (e.g. the Alps), semi‐enclosed sea basins and small river catchments, many problems remain. It is clear that such problems have to be faced in the context of analysis‐prediction systems bridging the gap between global and local scales of motion. These systems should allow for an adequate representation of key dynamical processes at all the relevant scales of motion.The Hydro‐Meteorological‐Marine System (‘Sistema Idro‐Meteo‐Mare’, SIMM) is a first step in developing an integrated system, adequately covering all scales of motion from global to local. A short description of the system is presented, highlighting scientific concepts behind design choices. A summary of the results of verification tests is also illustrated, together with a general evaluation of the whole process in planning, developing and running SIMM in order to assist future updates of the system, currently under development. Copyright © 2007 Royal Meteorological Society

A New Extreme-HP/HT Viscometer for New Drilling-Fluid Challenges

Summary Growing demand for natural gas in North America is driving the exploration and production industry to look for new resources in previously unexplored areas, and the deep Gulf of Mexico (GOM) continental shelf is currently attracting substantial attention. Several current deep-shelf high-pressure/high-temperature (HP/HT) wells have anticipated bottomhole temperatures that significantly exceed the operating limits of existing measuring-while-drilling and logging-while-drilling (MWD/LWD) tools; therefore, down-hole annular-pressure measurements will not be available for pressure management. This leaves temperature and hydraulic models as the best, if not the only, source of downhole-pressure information for these wells. These models depend on accurate surface inputs and laboratory-measured fluid properties under downhole conditions. Unfortunately, these anticipated temperatures and pressures also exceed the operating limits of conventional HP/HT viscometers. This lack of measured fluid properties under these extreme conditions will severely limit the ability of hydraulic models to predict downhole pressures. A new extreme-HP/HT (XHP/HT) concentric-cylinder viscometer was designed and built to fill this important technology gap for GOM deep-shelf HP/HT wells. The instrument is capable of measuring typical drilling-fluid viscosities up to 600°F (316°C) and 40,000 psig (276.0 MPa) and is capable of accurate property measurements for drilling fluids containing ferromagnetic materials. Subsequent verification and validation proved that the new viscometer compares favorably to commercially available field viscometers and more-sophisticated laboratory rheometers and therefore lends itself to widespread industry use. This paper reviews the development of the instrument and associated automated control system and explores health, safety, and environment (HSE) issues related to testing drilling fluids at these extreme conditions. The paper also presents results of verification and validation testing on invert-emulsion drilling fluids.

スパイク付き飛しょう体の空力特性制御に関する実験研究

Experimental studies on telescopic aerospikes for aerodynamic control are reported in this paper. Parametric study on the aerodynamic characteristics of the aerospike has performed including the effect of spike length L, base diameter of tip cone D, spike translating speed and direction. The Axial force coefficient Ca of the aerospike suddenly increases at L/D=3.0 due to flow mode transition from the separation to the reattachment. Reattachment/separation flow mode transition phenomenon can be applicable to a newly invented aerodynamic control device, which is called air-breathing aerospike. In this paper, verification test results of this air-breathing aerospike are also reported. A small solenoid valve in the body cylinder successfully controls reattachment/separation flow mode transition at the angle of attacks from 0 to 12 degree. The spiked bodies’ Ca varies according to the mode transition. As a result, we can control the aerodynamic property of the spiked body by opening/closing the valves periodically.

Microcosm Approach to Study Transport of Polychlorinated Biphenyls in Sediment

The transport of polychlorinated biphenyls (PCBs) in sediment is difficult to study in the laboratory due to their low solubility and strong tendency to sorb to sediment and experimental equipment. A small-scale laboratory microcosm was designed to study PCB transport in anaerobic surface sediment at microscale and to quantify transport rates. Results of verification testing showed that the experimental system enabled quantitative characterization of the diffusive transport of PCBs in sediment in a reasonable time frame (months). The fine-spatial-resolution results obtained were as expected with the less chlorinated, more mobile congeners transporting the fastest and the more heavily chlorinated compounds transporting more slowly. This laboratory microcosm system could be used to study the transport of many types of pollutants in sediment, but is particularly useful for hydrophobic organic compounds.

Development and Verification of 3000 Rpm 48 Inch Integral Shroud Blade for Steam Turbine

The 3000rpm 48inch blade for steam turbine was developed as one of the new standard series of LP end blades. The new LP end blades are characterized by the ISB (Integral Shroud Blade) structure. In the ISB structure, blades are continuously coupled by blade untwist due to centrifugal force when the blades rotate at high speed. Therefore, the number of the resonant vibration modes can be reduced by virtue of the vibration characteristics of the circumferentially continuous blades, and the resonant stress can be decreased due to the additional friction damping generated at shrouds and stubs. In order to develop the 3000rpm 48inch blade, the latest analysis methods to predict the vibration characteristics of the ISB structure were applied, after confirming their validity to the blade design. Moreover, the verification tests such as rotational vibration tests and model turbine tests were carried out in the shop to confirm the reliability of the developed blade. As the final verification test, the field test of the actual steam turbine was carried out in the site during the trial operation, and the vibration stress of the 3000rpm 48inch blade was measured by use of telemetry system. In the field test, the vibratory stress of the blade was measured under various operating conditions for more than one month. This paper first presents the up-to-date design technology applied to the design of the 3000rpm 48inch blade. In the second place, the results of the various verification tests carried out in the shop are presented as well as their procedure. Lastly, the results of the final verification tests of 3000rpm 48inch blade carried out in the site are presented.

交流超電導電力機器基盤技術研究開発 交流超電導電力機器基盤技術研究開発プロジェクトの成果の概要―超電導電力応用機器の開発成果―

The Superconducting—AC Equipment (Super-ACE) project was started in 2000 fiscal year as a national project to research and develop superconducting AC power equipment. The goal of the project is to develop basic technologies for high-temperature superconducting (HTS) cable, HTS fault current limiters (FCL), and HTS magnets for reactors and transformers. This paper describes major results of studies on the HTS superconductors, and outlines some of the results of verification testing completed for 500-m cable, FCL and HTS magnets.

적층고무형 면진 장치를 갖는 철근콘크리트 건물의 면진 특성

초록·키워드 목차 오류제보하기 등록된 정보가 없습니다. ABSTRACT1. 서론2. 실험체3. 면진 장치(NRB) 설계 및 성능 평가4. 실험체 설치 및 실험 방법5. 실험 결과 및 분석6. 결론참고문헌요약

R & D of Superconductive Cable in Japan

Super-ACE (Superconducting AC Equipments) project was started in 2000 fiscal year as a national project to research and develop superconducting AC power equipment. This project goal to develop basic technologies for high temperature superconducting (HTS) cable, HTS fault current limiter (FCL), HTS magnet for reactor and transformer. Main subjects of the cable study are development of: HTS conductor having 3 kA rated current with 1 W/m AC loss, cooling technologies for a 500 m HTS cable with 1 kA rated current, and analytical study of integrated HTS power system. This paper describes major results of studies on the HTS superconductors, and outline and some results of verification test of 500 m cable.

Verification test results of the experimental model coil for power system stabilization

The authors are engaged in technological endeavors to create a coil at a drastically reduced cost with the aim of making it practical for SMES for power system stabilization. With focus on its novel conductor material and uniquely shaped coil, which were exclusively developed with the target of reducing the cost of the coil, an experimental model coil was devised. It is characterized by a single solenoid coil made of aluminum stabilized NbTi CIC. Experiments such as a rated 9.6 kA current-carrying test and current interrupting test were conducted to examine the performance of the model coil. The test results proved that the SMES model coil would perform as initially designed.

QUALITY ASSURANCE IN MICROBIOLOGY

Quality assurance (QA) is the total process whereby the quality of laboratory reports can be guaranteed. The term quality control covers that part of QA, which primarily concerns the control of errors in the performance of tests and verification of test results. All materials, equipment and procedures must be adequately controlled. Culture media must be tested for sterility and performance. Each laboratory must have standard operating procedures (SOPs). QA of pre-analytical, analytical and post-analytical stages of microbiological procedures should be incorporated in SOPs. The laboratory must be well lit with dust-free air-conditioned environment. Environmental conditions should be monitored. Supervisory and technical personnel should be well qualified. The laboratory should participate in external and internal quality assurance schemes.