Y. Komori and M. Suzuki. Neutron Irradiation and Testing Reactor Center Oarai Research and Development Center

Transcription

1 5th International Symposium on Material Testing Reactors, Columbia, MO USA, October 22-25, 2012 Current Status of JMTR M. Ishihara, N. Kimura, N. Takemoto, M. Ooka, M. Kaminaga, T. Kusunoki, Y. Komori and M. Suzuki Neutron Irradiation and Testing Reactor Center Oarai Research and Development Center Japan Atomic Energy Agency

2 Contents 1. Introduction of JMTR 2. Refurbishment ubs Project 3. Current and Future Activities 4. Conclusion

3 1.1 Japan Atomic Energy Agency - Largest organization for atomic energy research & development in Japan - Staff : about 4,000 Tsuruga Prototype fast breeder Monju, Decommissioning of Advanced Thermal Reactor Fugen Tono High-level radwaste research Horonobe High-level radwaste research Aomori Decommissioning of nuclear facilities, Broader Approach technologies for nuclear fusion energy R&D Ningyotoge Decommissioning of uranium u enrichment plants Fukushima Office Headquarters of Fukushima Partnership Operations Tokai Basic research, Safety studies, Neutron Science, Nuclear fuel-cycle technologies, Rad- waste management and disposal, etc. Kansai Photon & Synchrotron Radiation Science Takasaki Radiation application Naka Fusion R&D, ITER support Oarai Experimental reactors Joyo, HTTR and JMTR; Advanced reactor R&D including FBR cycle commercialization Staff : about 800 1

4 1.2 Bird s-eye View of Oarai R&D Center Three research reactors are constructed, and five hot laboratories are available for the post irradiation examinations of materials/fuels. Japan Materials Testing Reactor (JMTR) JOYO HTTR 2

5 1.3 Framework and Functions of JMTR Neutron Irradiation and Testing Reactor Center Director: Masahide Suzuki Deputy Director: Masahiro Ishihara Masanori Kaminaga Akinori Naito Department of JMTR Director: Yoshihiro Komori Deputy Director: Tsuyoshi Kusunoki Project Coordination Section Utilization Promotion Section Irradiation Engineering Section Administration Section JMTR Reactor Engineering Section JMTR Reactor Section 1 JMTR Reactor Section 2 JMTR Irradiation Section JMTR Hot Laboratory Section General Manager General Manager General Manager General Manager General Manager General Manager General Manager General Manager General Manager Makoto Ooka Akinori Naito Kunihiko Tsuchiya Kiyoshi Kawata Yoshiharu Nagao Naohikp Hori Akitomi Fukasaku Masao Ohmi Shizuo Sozawa Planning on JMTR project Planning on JMTR utilization Technology development on JMTR irradiation test t and postirradiation examinations Administrative services on JMTR Planning on operation Design and manufacture of irradiation facilities Operation of reactor facilities Fuel management Maintenance of reactor facilities Operation and maintenance on irradiation at facilities Operation and maintenance on post-irradiation facilities 3

6 1.4 Outline of JMTR Purpose The JMTR was constructed to perform irradiation tests for LWR fuels and materials to establish domestic technology for developing nuclear power plants, and also to produce radio isotopes, and for the purpose of education & training. Canal (Waterway) Ancillary Facilities Room Reactor Building Construction (commencement ) :1965 Apr. First Criticality : 1968 Mar. For user operation : 1970 Sep. to 2006 Aug. Reactor thermal : 50 MW power Fast neutron flux : 4 x (n/m 2 s) (Maximum) Thermal neutron : 4 x (n/m 2 s) flux (Maximum) Reactor and Irradiation Facilities Hot Laboratory Major features One of the high neutron flux Materials Testing Reactor in the world Large irradiation area in the core region for various irradiation tests Flexible reactor core configuration allows various irradiation facilities to be installed to the reactor core The reactor building is connected to the hot laboratory by a canal for PIEs for fuels and materials. Concrete Cell : 8 Microscope Lead Cell : 4 Lead Cell : 7 g Steel Cell : 5 X-ray Microscopic analyzer : 1 4

7 1.5 Performance of JMTR Specifications of JMTR Reactor Power 50 MWt Fast Neutron Flux (Max) n/m 2 s Cross Section of the Core Hydraulic Rabbit Low Area Thermal Neutron Flux (Max) n/m 2 s HR Flow of Primary Coolant 6,000 m 3 /h OSF Coolant ttemperature 49 /56 1 Core Height 750mm Fuel Plate type, 19.8% 235 U Irradiation Capability (Max) 60 (20*) capsules Fluence/y (Max) n/m 2 y Shroud Facility dpa of Stainless Steel (Max) 4 dpa Standard d Fuel Element e Diameter of Capsule 30-65mm Fuel Follower / Control Rod Temp. Control (Max) 2,000 Aluminum Reflector Element Beryllium Reflector Element * : capsule with in-situ measurement Beryllium Frame Gamma-ray Shield Plate 5

8 1.6 Outline of the Hot Laboratory Tohoku Univ. PIE for fuels Eddy current test, X-ray micro analysis, Gamma scanning, Microstructure observation, Hardness test PIE for materials Crack propagation, Creep, Tensile, Fatigue, Fracture toughness, Charpy impact, Bulge (Small Punch) Concrete cell Microscope lead cell Lead cell Iron cell Cover type XMA cell : 8 : 4 : 7 : 5 : 1 Specimens RI Production Facility Transfer Post Irradiation Examination Facility (Hot Laboratory) J M T R Irradiated specimen Hot Labo. Inside/outside of JAEA Re-irradiation test Capsule assembling technology in a hot cell for re-irradiation tests Irradiated Heater specimen Canal LWR TIG-welding Sheath :Specimen flow 6

9 Contents 1. Introduction of JMTR 2. Refurbishment ubs Project 3. Current and Future Activities 4. Conclusion

10 2.1 Refurbishment works Refurbishment works of the JMTR have been carried out as following processes described below: 1. Investigation of Aged Components (2006JFY) Aged components were surveyed and selected by evaluating whether those could be used safely after JMTR re-operation. 2. Replacement of Rector Components ( JFY) Replacements were carried out within the range of licensing permission of JMTR. Replacements of the systems and components, such as, boiler system, refrigerator for air conditioning system, power supply system, and air supply / exhaust system, process control and instrumentation system, and so on, were conducted. 3. Installation of New Irradiation Facilities Corresponding to the user s requests, new irradiation facilities, such as test facilities for materials/fuels, production facility for medical isotopes etc. are being installed. 7

11 2.2 Refurbishment of JMTR Renewal of the reactor facilities are shown as encircled. Planning of new irradiation facilities : Irradiation facilities of LWR core materials Irradiation facilities of LWR fuels Production facility for silicon semiconductor Production facility for medical radioisotopes Reactor Building Hot Laboratory Canal Reactor facilities are refurbished during four years from JFY 2007 Reactor facilities are refurbished during four years from JFY New JMTR will restart promptly after the end of the seismic influence evaluation, and will operate for a period of about 20 years. 8

12 2.3 JMTR Refurbishment Schedule JFY JFY JFY Items Periods of JAEA 1st 2nd 3rd Reoperation Evaluation of JMTR by government Operation of JMTR 50MW The 2011 off the Pacific coast of Tohoku Earthquake Refurbishment of JMTR *1 Irradiation facility *2 (include PIE facility) -LWR material - LWR fuel power rump - LWR fuel loop - Improvement of Hot-laboratory *3 *3 *3 Schedule will be changed by user s requests. *1: Refurbishment works are carried out by government budget. *2: Irradiation facilities are installed by users fund. *3: IASCC, Irradiation embrittlement, Hafnium irradiation and fuel ramp tests are being prepared in a NISA (Nuclear and Industrial Safety Agency) project. 9

13 2.4 Seismic influence evaluation of JMTR after the 2011 off the Pacific coast of Tohoku Earthquake Equipment inspections and seismic response analysis for reactor components, reactor building have been carried out. As a result, integrity of the JMTR reactor facilities has been evaluated and verified for re-operation. (1) Equipment inspections for reactor components/facilities and JMTR reactor building Visual inspection and performance tests for reactor components/facilities and JMTR reactor building have been carried out. As the results of inspection, integrity of the JMTR reactor facilities have been evaluated and verified. During the inspection, some cracks of concrete were found. These cracks were evaluated to have no influence on the components or facilities functions. Required repair is on going. It will be completed until at the end of October. (2) Seismic influence evaluation by the seismic response analysis Based on observed record at the 2011 off the Pacific coast of Tohoku Earthquake, the earthquake-proof evaluation (check of generating stress being in an elastic range) has been carried out for buildings and reactor components by the seismic response analysis. (a) JMTR Reactor building As for the reactor building, while seismic response analysis including re-examination of the analytical model was carried out so that 3.11 seismic observation records could be reproduced, and obtained the floor response spectrum (FRS) etc. by the mass system model. As a result, the building was in the elastic range in general. (b) Reactor components/facilities Based on the seismic response analysis, it was verified that generated stresses of all the components/facilities ( equivalent to S class), were in the elastic range. Above results were reported to the MEXT (regulatory agency) on September 7, From now on, validity of the seismic influence evaluation results will be evaluated by the Nuclear Regulation Authority (NRA). JMTR will be re-started after the validation evaluation and the periodical inspection of the JMTR reactor facilities by the NRA. 10

14 2.5 Planning of new irradiation facilities Ageing Management of LWRs - Aging management - Development of next Generation LWRs <Example> : Al Reflector : Be Reflector Gamma ray shield plate Extension of industry use Si semiconductor production 99 Mo production LWR material LWR fuel loop Progress of science and technology LWR fuel power rump Be H flame Basical study - Fusion reactor Development(ITER) - High Temperature Gas cooling Reactor Development - Basic research - University use, etc. 11

15 Contents 1. Introduction of JMTR 2. Refurbishment ubs Project 3. Current and Future Activities 4. Conclusion

16 3.1 Expected Role of New JMTR LWR materials and fuels safety research 12

17 Target of new JMTR 3.2 Concept of New JMTR 13

18 3.3 Operational Plan of New JMTR 100 The refurbishment of the JMTR facilities were completed by the end of FY2010. However, seismic influence evaluation is in progress with directions of the government. Re-starting would be after the completion of the seismic influence evaluation. Reactor op av vailability(% peration %) ra ate(%) Top Level OPAL HFR HBWR BR-2 JRR-3 JMTR HANARO (present) HFIR OSIRIS SM Corresponding to the increase in JMTR irradiation utilization, reactor availability should be increased. - After restarting, 5 to 7 cycles per year are planned. Expected progress of - Application to JMTR utilization started from March 20 RNew JMTR operation rate2010 by the JMTR website. ( ussj.jaea.go.jp) Foreign users are also welcome to use the JMTR facilities. Thermal output (MW) Reactor availability 14

19 3.4 Human Resources Development (1/2) 1. On-Job Training The refurbishment of reactor facilities and the installation of new irradiation facilities could contribute tib t to HRD as on-job training. 2. Practical Training The development of advanced irradiation technology could be a valuable chance for education and training. - Development of advanced in-situ instrumentation technology [ex] In-situ Observation Technology of Reactor Core under reactor operation, Remote Sensing Technology of Irradiation Behavior without Cable, Elemental technology (High temperature multi-paired thermocouple, Uniformly irradiation, sensor of oxygen and hydrogen) - 99 Mo production technology development by new Mo solution irradiation method - Development of recycling technology on used beryllium reflector irradiated by neutron (recycling technology aiming at production of beryllium pebbles as a neutron multiplier for ITER blanket test module) - Basic and practical trainings using testing reactor simulator. 15

20 3.4 Human Resources Development (2/2) - Basic and practical trainings using simulator for materials testing reactor - Simulator for materials testing reactor For domestic HRD Real time simulator based on the JMTR for HRD (1) Training course using JMTR and related and safe/stable reactor operation facilities i as advanced d research Extension tools of the simulator to respond infrastructures (from JFY2010- ) training requirement and study. 800 trainees day (JFY2010-JFY2012) Reactor control panel Large size monitor Process control panel Hardware overview [Practical training using the simulator] Operation of reactor and irradiation facility (start-up, irradiation test, shutdown) Simulation of abnormal/accident conditions (LOCA, loss of all electricity, etc.) Irrad. facility control panel (2) Internship for technical college students (from JFY2011- ) 120 trainees day (JFY2011-JFY2012) For foreign HRD (1) Training for foreign young researchers and engineers (from JFY ) 340 trainees day (JFY2011-JFY2012) Start of training using the simulator from JFY

21 3.5 JAEA s Proposal on World Network Construction of world network is proposed to achieve efficient facility utilization and providing high quality irradiation data by role sharing of irradiation tests with materials testing reactors. World Network WWR-K HANARO European center TRIGA PUSPATI BR2 HBWR JMTR OPAL Asian Network HFIR ATR US center Asian center World Network Construction of international cooperation system by world wide testing reactor network Mutual understanding Information exchange Interchange of staffs, etc. Efficient facility utilization and providing high quality irradiation data by role sharing of irradiation tests with characteristics of each htesting ti reactor Contribution - Study of fuel / material for LWRs - Education, training etc. - Stable supply of RI, 99 Mo etc. 17

22 3.6 Conceptual Design study of Multipurpose Compact Test and Research Reactor JAEA (Special team) College students and university students in Asian countries Colleges, universities and technical junior colleges in Japan Contribution to Nuclear Human Resources Development in Japan / Overseas NEXT GENERATION RESEARCH AND TEST REACTOR * Design group Contribution to Nuclear Human Resources Development in Overseas Ref: Presented by H.Nagata, N.Hori, et al. ISMTR-4, December 8. Industrial arena Contribution to the Introduction of Nuclear Power Plant in Asian Countries JAEA Nuclear Human Resource Development Center Young Researchers / Engineers in Asian Countries (*) the Shutdown of JMTR :around

23 Contents 1. Introduction of JMTR 2. Refurbishment ubs Project 3. Current and Future Activities 4. Conclusion

24 4.Conclusion JAEA placed the JMTR as a facility which supports the basic technology of the nuclear energy, and carried out the refurbishment of the reactor facilities taking four years from JFY 2007 for prolonged operation; the new JMTR will be re-started promptly p after the completion of seismic influence evaluation. New irradiation facilities are under installation in the JMTR; LWR fuels/materials irradiation facilities, industrial use for RI production, and so on. Human resource development program by both on-job training and practical training i is being proceeded d for domestic as well as foreign young researchers, engineers. New JMTR, as one of the core irradiation testing reactors in Asia, would provide high quality irradiation data by construction of world/asian networks, and also would contribute to the introduction of nuclear power plants in Asian countries by the HRD etc. 19