YOKOSUKA

The Yokosuka site is situated on the west

coast (Sagami Bay) of the Miura peninsula.

There are R&D facilities on an extensive area of

256,576m , with approximately 230 employees

including researchers on electrical engineering,

mechanical engineering, chemistry, materials

science, and nuclear power engineering engaged

in a wide range of R&D work from basic studies

to practical applications.

There was the Ultra–High Voltage Research

Institute (incorporated foundation) at this site

before 1977. CRIEPI succeeded this Institute and

established the Ultra–High Voltage Research Laboratory in 1977 as a branch of CRIEPI. Later, in 1985, this

laboratory was reorganized into the Yokosuka Research Laboratory as a large-scale R&D base. Since then the

laboratory has added studies such as coal utilization technology, new technology for electricity utilization and

development of inventive technologies for functional materials.

In April 2004, to further enhance the research capabilities, CRIEPI reorganized into eight specialized research

laboratories. At the Yokosuka site, three research laboratories (the Electric Power Engineering Laboratory, the

Energy Engineering Laboratory and the Materials Science Research Laboratory) have been established.

High Power Testing Laboratory

Yok ka Re S C t Overv w

◆High-Voltage and Insulation Sector

Lightning and Electromagnetic Environment Sector

◆Applied High Energy Physics Sector

◆Electric Power Application Sector

Shiobara Testing Yard

Materials Science Research Laboratory

High Efficiency Power Generation Sector

◆Advanced Fuel Utilization Sector

Heat Pump and Thermal Storage Sector

Energy Conversion Engineering Sector

◆Structural Materials Sector

◆Electrochemistry Sector

PD center

Yokosuka Operation & Service Center

Planning Group Yokosuka Research Contracts & Intellectual Property Section

Electric Power Engineering Research Laboratory

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◆Electronic Materials Sector

Energy Engineering Research Laboratory

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Performance Demonstration (PD) is a qualification system to confirm

inspection capability, featuring ultrasonic equipment, inspection proce-

dures, and operators to implement ultrasonic testing of piping for nuclear

power plants.

The Performance Demonstration Center carries out fair and transparent

PD testing.

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Major research on Electric Power Engineering Research Laboratory

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High Power Testing Facility

２ High Voltage Insulation Test Bldg.

Long Length XLPE Cable Deterioration Test Bldg.

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Seaside Insulator Contamination Testing Yard

Research utilizing high voltage

High Voltage Insulation Test Bldg. (Large Hall)

Experiment to protect power distribution lines from lighting

Research on salt damage to outdoor electric power facilities including insulators

Short - Circuit Testing Bldg.

High Voltage application facilites at coastal exposure testing yard.

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Research on insulating performance of underground XLPE cable

Long Length XLPE Cable Deterioration Test Facility

Panoramic view of Hig Power Testing Facility

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５ Coal Combustion Test Facility

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Advanced Fuel Utilization Testing Bldg.７

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Advanced Combustion Test Facility for Diversification of Available Fuel Types

Heat Pump Research & Development Testing Bldg.

Elevated Pressure and Temperature Underwater Stress Corrosion Fracture Testing Equipment

True-to-Life-Component Lifetime Estimation Equipment

Non-Destructive Inspection Equipment

Lithium Secondary Battery Performance Evaluation Testing Equipment

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Coal Gasification Testing Bldg.

High-Temperature Superconductor Testing Equipment

Research on high currentAt this facility, testing research is carried out where high current occurring in electrical power systems caused by light-ning and other problems are artificially generated using a short-circuit generators. The research results are used to develop higher-performance electrical equipment that can withstand high currents, and that can quickly eliminate fault currents.As an accredited laboratory, we also issue performance certifi-cation on electric power equipment including newly devel-oped circuit breakers and etc.

High voltage tests for 500 kV class power equipments and insulators are carried out at a full-scale capacity.The voltage is the maximum voltage of transmission lines in Japan.This research site also evaluates the insulation performance of aged electric power apparatus and insulators under various polluted conditions combined with fog and rain.

High voltage experiment using impulse generator with capacity of 12 million volts is possible in Shiobara Testing Yard located in Nasushiobara City, Tochigi Prefec-ture.This facility conducts research on protecting power transmission and distribution lines as well as IT equipment from lightning, and on improving the electromagnetic environment of transmission lines.

XLPE cables have performed a critically important role in urban underground power transmis-sion and in interconnection of substation facilities since they were introduced in 1970s. In recent years, more and more aged XLPE cables have been still used for more than 30 years. Therefore, it is important to clarify causes of insulation deterioration in sampling tests, and to support their renewal strategies for reliable power supply. This facility allows us to carry out the pre-breakdown discharge detection test for 200-meter class XLPE cables. Through this test, withstand voltages and aspects of deterioration are obtained.

Japan being an island nation, insulating performance of outdoor electric power facilities including insulators is affected by salt pollution. Research on salt deposit properties, electrical insulating performance, long term reliability of outdoor insulat-ing materials and equipments are performed at this high voltage application facili-ties located at coastal exposure testing yard.

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Major research findings in materials science research

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Research of diversification of available fuel type for pulverized coal fired power plant

Research on energy-saving technology utilizing waste heat by electric power

Research on reforming low-grade energy resource such as biomass and lignite to suitable fuel for coal-fired power plant

Research on the efficient use of coal , reducing CO emissions

Research predicting residual lifetime of welded pipes at thermal power plants

Bending and internal pressure on real structural samples

Test facility for crack growth measurement utilizing large samples

Research on stress corrosion cracking

Example of non-destructive inspection results

New high-temperature superconductive materials identification and synthesis

Laser-MBE apparatus equipped with pure ozone production system

4 Evaluation Study of Large Scale Lithium Secondary Batteries

Example of non-destructive inspection result

Lithium Secondary Battery Evaluation Facility (Akagi Testing Center)

Carbonization Test Facility

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Coal research gasifier

Testing apparatus for basic study on CO heat pump water heaters (EcoCute prototype)

Coal combustion test facility

Combustion test furnace with single burner Turbulent combustion modeling furnace

The integrated coal gasification combined cycle (IGCC) system is promising as a high-efficiency coal-fired power plant. Our research in this area focuses on improving reliabil-ity of IGCC technology using our small-scale coal gasifier that was the prototype of the 250 MW IGCC demonstration plant in Iwaki City, Fukushima Prefecture.In addition, we have proposed a next-generation IGCC system (oxy-fuel IGCC) with CO capture and storage (CCS) to reduce CO emission significantly without drop of thermal efficiency. We are developing fundamentals on the novel gasification technology.

The heat pump has garnered a great deal of attention both in Japan and otherwise for its energy-saving and CO reducing technologies. Our research in this area focuses on further boosting performance, lowering initial costs, and using of refrigerants with low global warming potential (GWP). The focus is on heat pumps for process heating in industrial use in addition to those in commercial and residential use. In addition, this research center is the originator of EcoCute, the world’s first heat pump water heater utilizing CO as a refrigerant.

A research on carbonization process of biomass is carried out. The biomass is one of the renewable sources of energy. The carbonized biomass is a suitable fuel for coal-fired power plant, because the grindability and the calorific value of biomass are enhanced by carbon-ization process. It makes possible the significant reduction of CO emissions to increase the amount of biomass use in coal-fired power plant. A research on the dehydration of lignite in coal-fired power plant is also carried out. The lignite is not used widely outside the produc-ing country because of its high moisture. An efficient solvent dehydration technology of lignite is currently under development.

Pulverized coal fired power generation is an important electric power source in Japan. In order to import low cost coal stably, it is important to utilize unused and low quality coal, and biomass blended with coal to reduce CO emission.The coal combustion test facility ( ) consists of mill, furnace and flue gas cleaning equipment scale-downed from actual coal fired power plant. Characteristics of grindability and combustibility of unused fuel, and ash quality and so on are evaluated in total system by the coal combustion test facility.Based on these results, we are developing an evaluating tool to adapt to actual coal fired power plant to be estimated by fuel property preliminary. Combustion characteristics of coal and other fuel are evaluated and combustion technologies are developed at the advanced combustion test facility for diversification of available fuel type ( ) .

High-efficiency fossil power plants are plagued with problems relating to creep damage in welded parts of the tubes made from heat resistant alloys. High-precision inspection and residual lifetime assessment technologies are key to the reliable main-tenance of welded parts.CRIEPI is investigating the deformation behavior and damage process of actual large-diameter welded pipes subjected to internal pressure and bending load at elevated temperatures. The tests are designed to demonstrate the applicability of our residual lifetime assessment techniques for the steam pipes in fossil power plants.

At this facility, we evaluate crack growth rates of stress corrosion cracking under simulated primary coolant conditions at light water reactors. The facility enables us to use large compact tension samples of a thickness of three inches (approximately 75 mm), for accurate evaluation of crack growth under high constraint crack tip conditions.

We study the basic physics of high-Tc superconductors to design new materials that work at higher temperatures. The current target material is cuprate superconductor thin film prepared using high-vacuum laser MBE with pure ozone as an oxidant. We also conduct basic research on other oxides and new iron-based superconductors.

Three high-vacuum chambers are combined by tunnel chambers in order to transfer the samples from the growth chambers to the analysis chambers without exposing to the air. The inset shows two thin-film superconductor samples set on the holder for DC resistivity measurements.

Our non-destructive inspection teams research material degradation and flaw evaluation tech-nologies that contribute to the safety of electric power generation and distribution systems. To this end we utilize state-of-the-art inspection equipment, simulation technology, and analysis technology.Our outcomes will increase the reliability of facilities through plant maintenance activities and the investigation where damage is detected.

Focusing on the capacity of lithium batters for highly efficient electricity storage, we carry out performance testing and evaluation of large scale lithium secondary batter-ies with a view to application in electric vehicles and stationary energy storage systems. This contributes to the robustness of electric power systems in renewable energy penetration.

Generate B, C, D scope images corresponding to transparent ranges

Transparent C scope

Transparent D scope

Transparent B scope

ProbeIndex axis

C scope

Scan axis

B scope

D scope

Combustion technologies for high moisture content coal, low grindability coal and biomass are developed at the combustion test furnace with single burner in the advanced combustion test facility. In addition, we investigate detail characteristics of coal combustion field (ex. gas composition, ash property and so on) by means of the turbulent com-bustion modeling furnace coupled with the state of the art laser measurement technologies.We are developing numerical simulation based estima-tion technology which can predict combustion charac-teristics from fuel properties and plant specification.

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Major research on Energy Engineering Reseach Laboratory

Electric Power Engineering Research Laboratory

Main missions of the Electric Power Engineering Research Laboratory are development of lifetime estimation methods for aged power apparatus and cables in transmission and distribution systems; development of insulation design and lightning protection methods for power apparatus, solution of electromagnetic compatibility ( EMC ) and electromagnetic field ( EMF ) issues development of appropriate countermeasures for high-current arcs; development of next-generation power technologies; and realization of laser, plasma, and superconductivity applications.

At the Energy Engineering Laboratory, aiming at highly efficient, low-cost and clean utilization of energy resources such as fossil fuels, we are involved in research activities on energy conversion, energy storage, energy utilization, environmental protection, biomass utilization, energy systems, the development of systems and elemental equipment in thermal power plants, diagnosis of plant equipment problems, operation and maintenance technologies，and advanced thermal utilization and storage technology on customer side such as heat pumps.

Materials Science Research LaboratoryMaterials technology has the potential to lead to breakthroughs in all other technological fields,

and is thus a key pursuit. The Materials Science Research Laboratory pursues solutions to material technology issues relevant to the electric utilities and other energy industries. The laboratory provides materials engineering solutions that not only enable the advanced operation of energy equipment, but also play an active role in general research and development of new materials.

Energy Engineering Research Laboratory

Cross-sectional research

Since the occurrence of the Great East Japan Earthquake, more detailed explanations are required for the safety of nuclear power plants. The NPP Maintenance Research Team conducts research concerning maintenance activities. The team is comprised of four units: the Reactor Structure Safety Unit, Equipment and Pipe Safety Unit, Cable Safety Unit, and Non-Destructive Testing Unit. With a view to incorporation into standards, codes and on-site application, the team engages in research on irradia-tion embrittlement, pipe wall thinning, water chemistry, insulation cable aging, and development of non-destructive testing technique. To improve maintenance activities, we have launched new projects such as risk base maintenance.

NPP Maintenance Research Team

Voltage and power flow in the distribution system sharply fluctuate by the mass connection of intermittent power such as photovoltaics (PV). These big changes in the demand side affect sequentially power distribution, power transmission, power generation, also business management. Therefore, it is essential to manage power supply & demand in terms of overall optimization. MPSD strongly promotes the research in the field of demand side such as the provision of customer experience and improvement of the load factor besides power quality maintenance, supply reliability and public safety in the field of distribution system.

Research Team for Advanced Management of Power Supply & Demand (MPSD)９

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2015.4

Electric Power Engineering Research Laboratory 61 personsMaterials Science Research Laboratory 71 persons

Energy Engineering Research Laboratory 68 personsYokosuka Operation & Service Center 27 persons

2015.7

From JR Yokosuka line Zushi Station and Keikyu Shinzushi StationBy public bus

At JR Zushi Station southern bus stop No.2, Keikyu Shizushi Station southern bus stop No.1Get on the bus via Yokosuka Shimin Byoin (Yokosuka City Municipal Hospital) or Nagai, get off at Kashima bus stop and walk 3 min.Get on the bus via Denryoku Chuo Kenkyujo (CRIEPI) and get off at the terminal Denryoku Chuou Kenkyujo (in front of the main building of CRIEPI)By taxi

About 30 min. required from JR Zushi Station

From JR Yokosuka line Yokosuka Station or Keikyu Yokosuka-Chuo StationBy public bus

At JR Yokosuka Station southern bus stop No 2, Keikyu Yokosuka-Chuo Station bus stop No.5 across a pedestrian's bridgeGet on the bus via Ogusu-ashinaguchi, get off at Kashima bus stop and walk 3 min.(service in the morning and evening)Get on the bus via Yokosuka Shimin Byoin (Yokosuka City Municipal Hospital) or Nagai, get off at Yokosuka Shimin Byoin bus stop and walk 10 min.By taxi

About 30 min. required from JR Yokosuka Station or Keikyu Yokosuka-Chuo Station

Established the Electric Technology Research Institute in Komae city, Tokyo Metropolis for the Central Research Institute of Electric Power Industry

1952 Renamed the Central Research Institute of Electric Power Industry added the Social Economic Research Laboratory

1977 Established the High Voltage Power Laboratory merged the High Voltage Power Laboratory (present ; the High Power Testing Laboratory)

1979 Renamed the Takeyama Testing and Research Center

1985 Renamed the Yokosuka Research Laboratory

2001 Founded the High Power Testing Laboratory

2004 Reorganized the eight Research Laboratories, Organized the Electric Power Engineering Research Laboratory, the Energy Engineering Research Laboratory and the Materials Science Research Laboratory in the Yokosuka Site

2005 Inaugurated the PD center

2010 Purchased he neighboring land (Approx. 45,000 sqm)

2-6-1, Nagasaka, Yokosuka-shi, Kanagawa-ken, 240-0196

TEL 046-856-2121 (representation) FAX 046-857-3072

Yokosuka Research Contracts & Intellectual Property Sec ion 10 persons