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JAEA Reports

Material test data of 316FR Steel (IX)

Odaka, Susumu; Kato, Shoichi; Yoshida, Eiichi; Kawakami, Tomohiro*; Suzuki, Takaichi*; Kawashima, Seiichi*; Ishigami, Katsuo*

JNC TN9450 2005-001, 196 Pages, 2005/03

JNC-TN9450-2005-001.pdf:6.7MB

Material test of 316FR steel, which was used for structure material of fast breeder reactor (FBR) has been preformed in New Technology Development Group. In this report, the result of test obtained up to this time was collected. Many valuable data that long time test more than 40000 hours including sodium environment test data in this report will be use for material examination of FBR in the future.Contents of the data sheet are as follows; (1) Material: 316FR Steel, (2) Test environment: In air,in sodium, (3) Test emperature: Room temperature to 800, (4) Test method: According to JIS and FBR metallic materials test manual (Revised edition), (5) Number of data:Tensile tests 234, Creep tests 408, Fatigue tests 201, Creep-fatigue tests 47, Relaxation tests 6,Total 896 This report consists of the printouts fromthe structural material data processing system, SMAT.

Journal Articles

Development of a faulty reactivity detection system appling a digital H$$infty$$ estimator

Suzuki, Katsuo; Suzudo, Tomoaki; Nabeshima, Kunihiko

Nihon Genshiryoku Gakkai Wabun Rombunshi, 3(1), p.24 - 33, 2004/03

This paper concerns an application of digital optimal H$$infty$$ estimator to the detection of faulty reactivity in real-time. The detection system, fundamentally based on the reactivity balance method, is composed of three modules, i.e. the net reactivity estimator, the feedback reactivity estimator and the reactivity balance circuit. H$$infty$$ optimal filters are used for these two reactivity estimators, and the nonlinear neutronics are taken into consideration especially for the design of the net reactivity estimator. A series of performance tests of the detection system are conducted by using numerical simulations of reactor dynamics with the insertion of a faulty reactivity for an experimental fast breeder reactor JOYO. The system detects the typical artificial reactivity insertions of 1¢ within a few seconds with the accuracy of 0.1¢, and is satisfactory for its practical use.

Journal Articles

Reactivity estimation using digital nonlinear H$$_{infty}$$ estimator for VHTRC experiment

Suzuki, Katsuo; Nabeshima, Kunihiko; Yamane, Tsuyoshi; Fujii, Yoshio*

Nihon Genshiryoku Gakkai Wabun Rombunshi, 2(4), p.408 - 417, 2003/12

On-line and real-time estimation of time-varying reactivity in a nuclear reactor is necessary for early detection of reactivity anomaly and safe operation. Using a digital nonlinear H$$infty$$ estimator, an experiment of real-time dynamic reactivity estimation was carried out in the VHTRC of JAERI. Some technical issues of the experiment are described, such as reactivity insertion, data sampling frequency, anti-aliasing filter, experimental circuit and digitalizing nonlinear H$$infty$$ reactivity estimator, and so on. Then, we discussed the experimental results obtained by the digital nonlinear H$$infty$$ estimator with sampled data of the nuclear instrumentation signal for the power responses under various reactivity insertions. Good performances of estimated reactivity were observed, with almost no delay to the true reactivity and sufficient accuracy between 0.05cent and 0.1cent. From the results of the experiment, it is concluded that the digital nonlinear H$$infty$$ reactivity estimator can be applied as on-line real-time reactivity meter for actual nuclear plants.

Journal Articles

A Mobile robot system executing a task under human assistance

Ishikawa, Nobuyuki; Furukawa, Yoshio*; Suzuki, Katsuo*

Nihon Robotto Gakkai-Shi, 20(2), p.173 - 179, 2002/03

In this study, we have developed new type of mobile robot system, in which robot executes a task under human assistance, aiming to improve efficiency of task performance. Human assistance is utilized in the following two aspects: 1) Problem solving in a navigation such as obstacle avoidance, 2) image information extraction required for correcting position estimation by odometry. As a system component, we have developed navigation command interpreter with intervention function to realize human assisted navigation conveniently. We have also developed GUI(Graphical User Interface) for extracting image information to implement the positioning error correction algorithm. Feasibility of the system is demonstrated by experiment under the mock-up environment.

Journal Articles

Nuclear power plant monitoring with recurrent neural network

Nabeshima, Kunihiko; Inoue, K.*; Kudo, Kazuhiko*; Suzuki, Katsuo*

International Journal of Knowledge; Based Intelligent Engineering Systems, 4(4), p.208 - 212, 2000/10

no abstracts in English

JAEA Reports

Investigation of utilizing plutonium as mixed oxide fuel(3)

*; *; Suzuki, Katsuo*

JNC TJ9440 99-014, 73 Pages, 1999/03

JNC-TJ9440-99-014.pdf:2.31MB

Planning of the plutonium utilization in a thermal reactor have been investigated to evaluate the scenario for FBR development. Plans for the partial loading of MOX fuel in the Takaham-3,4 plant are studied. Information of the full MOX utilizing plans in an advanced light water reactor is summarized based on the documents distributed at the related technical committee. Nuclear compositions of the spent MOX fuel have been evaluated using SRAC and ORIGEN-2 code. Results of the study are as follows: (1)Surveying the status of MOX fuel utilization. Based on the public documents, the status and plans for utilizing both the partial loading and the full loading of MOX fuel in the LWR core have been summarized. (2)Evaluation of spent MOX fuel compositions. Nuclear compositions of the spent MOX fuel have been evaluated and summarized for both the APWR uranium core and APWR plutonium core.

JAEA Reports

Pulse propagation characteristics of the solenoid electrode for a position-sensitive fission counter

Yamagishi, Hideshi; Suzuki, Katsuo; Kakuta, Tsunemi; ; *; *

JAERI-Research 99-002, 18 Pages, 1999/01

JAERI-Research-99-002.pdf:1.16MB

no abstracts in English

Journal Articles

Development of a human collaborative mobile robot system

Ishikawa, Nobuyuki; *; Suzuki, Katsuo

Dai-4-Kai Robothikusu Shimpojia, p.377 - 380, 1999/00

no abstracts in English

Journal Articles

Design method for 2-degree-of-freedom controller based on Pade approximation of the denominator series expansion

Ishikawa, Nobuyuki; Suzuki, Katsuo

Nihon Genshiryoku Gakkai-Shi, 41(9), p.937 - 945, 1999/00

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Feasibility study on the application of a human collaborative robot system to the inspecting patrol of nuclear power plants

Ishikawa, Nobuyuki; Suzuki, Katsuo

Proc. of Human-Computer Interaction International'99, 2, p.1172 - 1176, 1999/00

no abstracts in English

Journal Articles

Hybrid monitoring system for high temperature gas cooling reactor

Nabeshima, Kunihiko; Tuerkcan, E.*; Suzudo, Tomoaki; Nakagawa, Shigeaki; Inoue, K.*; Oono, Tomio*; *; Suzuki, Katsuo

Proc. of Human-Computer Interaction International'99, 2, p.1187 - 1191, 1999/00

no abstracts in English

JAEA Reports

Obstacle avoidance test using a sensor-based autonomouse robotic system

Fujii, Yoshio; Suzuki, Katsuo

JAERI-Tech 98-054, 65 Pages, 1998/12

JAERI-Tech-98-054.pdf:4.08MB

no abstracts in English

JAEA Reports

Design of the characteristic impedance and trial manufacturing of the solenoid electrode structure for a position-sensitive fission counter

Yamagishi, Hideshi; Suzuki, Katsuo; Kakuta, Tsunemi;

JAERI-Research 98-063, 21 Pages, 1998/11

JAERI-Research-98-063.pdf:1.17MB

no abstracts in English

JAEA Reports

A Method of reactor power decrease by 2DOF control system during BWR power oscillation

Ishikawa, Nobuyuki; Suzuki, Katsuo

JAERI-Research 98-055, 31 Pages, 1998/09

JAERI-Research-98-055.pdf:0.86MB

no abstracts in English

Journal Articles

Real-time nuclear power plant monitoring with neural network

Nabeshima, Kunihiko; Suzudo, Tomoaki; Suzuki, Katsuo; Tuerkcan, E.*

Journal of Nuclear Science and Technology, 35(2), p.93 - 100, 1998/02

 Times Cited Count:35 Percentile:91.65(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Obstacle avoidance test using a redundant manipulator

Fujii, Yoshio; Suzuki, Katsuo

JAERI-Tech 97-071, 42 Pages, 1998/01

JAERI-Tech-97-071.pdf:1.71MB

no abstracts in English

Journal Articles

Correction of position estimation error of mobile robot by using TV image deviation

Ishikawa, Nobuyuki; Suzuki, Katsuo

Dai-3-Kai Robothikusu Shimpojia, p.273 - 278, 1998/00

no abstracts in English

Journal Articles

Nuclear power plant monitoring with recurrent neural network

Nabeshima, Kunihiko; Suzuki, Katsuo; Inoue, K.*; *

Engineering Benefits from Neural Networks, p.257 - 260, 1998/00

no abstracts in English

Journal Articles

Effect of long-term storage of LWR spent fuel on Pu-thermal fuel cycle

Kurosawa, Masayoshi; Naito, Yoshitaka; Suyama, Kenya; *; Suzuki, Katsuo*; *

Nihon Genshiryoku Gakkai-Shi, 40(6), p.486 - 494, 1998/00

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Early fault detection for nuclear power plant using recurrent neural network

Nabeshima, Kunihiko; Inoue, K.*; Suzuki, Katsuo; *

Proc. of 5th Int. Conf. on Neural Information Processing (ICONIP'98), 2, p.1102 - 1105, 1998/00

no abstracts in English

81 (Records 1-20 displayed on this page)