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JAEA Reports

Test methods for robots for nuclear emergency response and decommissioning; Tests for moving performances of robots (JAEA-TM-0004 and JAEA-TM-0005)

Kawabata, Kuniaki; Yamada, Taichi; Abe, Hiroyuki*

JAEA-Technology 2021-021, 30 Pages, 2021/11

JAEA-Technology-2021-021.pdf:2.55MB

This report describes the test procedures for performance evaluation of remotely operated robot utilized for nuclear emergency responses and decommissioning that provide to compare among the robot's performances quantitatively and relatively. After the accident at Fukushima Daiichi Nuclear Power Station of the Tokyo Electric Power Company Holdings Inc. (FDNPS) occurred, remotely operated robots have been deployed and utilized in the response tasks. Such post-accident work experiences and lessons learned are very valuable for developing the robots in the future. Therefore, we were motivated to develop the test methods for performance evaluation of the robot by referring with such experiences and lessons. In recent decommissioning tasks, reconnaissance on the distribution and status of nuclear fuel debris inside the Primary Containment Vessel (PCV) have been carried out. The insertion and deployment of robots into PCV were carried out through a penetration pipe with small diameter to prevent the scattering of radioactive materials. According to the authors' survey on such works have carried out in Units 1 and 2 of FDNPS, in order to carry out the reconnaissance work by the robot deployed into the PCV, it was clarified that the robots are required to run freely on the floor located below the exit of the penetration pipe and run freely on the inclined surface located below the exit of the pipe. This document describes two test procedures for performance evaluation of the robot connected with the cable such as running on the floor after being deployed through a penetration pipe and running on the inclined surface after being deployed through a penetration pipe. Typical course layout and the demonstration of test running are also illustrated for the references.

Journal Articles

Pressure dependence of effective pair potentials in AgBr determined by extended X-ray absorption fine structure

Yoshiasa, Akira*; Murai, Keiichiro*; Nagai, Takaya*; Katayama, Yoshinori

Japanese Journal of Applied Physics, Part 1, 40(4A), p.2395 - 2398, 2001/04

 Times Cited Count:5 Percentile:26.29(Physics, Applied)

The pressure dependence of extended X-ray absorption fine structure (EXAFS) Debye-Waller factors in AgBr has been investigated using the cumulant expansion method. The Br K-edge EXAFS spectra were measured in the transmission mode under high pressure ($$leq$$9.1GPa) at room temperature using a cubic anvil type apparatus (MAX90) and synchrotron radiation from the Photon Factory, Tsukuba. The effective pair potentials $$V(u)=au^{2}/2+bu^{3}/3!$$, were evaluated and the potential coefficient $$a$$ at 2.1, 4.2 and 6.1GPa are 1.59(4), 1.75(4) and 1.91(4) eV/$$AA^{-2}$$, respectively. The energies of the third-order anharmonic potential coefficient $$b$$ maintain nearly constant values with pressure though the third-order cumulant $$sigma_{3}$$ decreases with increasing in pressure.

JAEA Reports

None

; ; Shimizu, Kazuhiko; Miyahara, Kaname; ; Seo, Toshihiro; Fujita, Tomoo

JNC TN1410 2000-008, 100 Pages, 2000/10

JNC-TN1410-2000-008.pdf:4.23MB

no abstracts in English

Journal Articles

Current profile reproduction study on the basis of a new expansion method with the eigenfunctions defined in the tokamak plasma interior

Kurihara, Kenichi

Fusion Technology, 34(3), p.548 - 552, 1998/11

no abstracts in English

JAEA Reports

Journal Articles

Fluctuations and the many-body Lyapunov exponent

D.M.Barnett*; Tajima, Toshiki*

Physical Review E, 54(6), p.6084 - 6092, 1996/12

 Times Cited Count:11 Percentile:48.01(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Nearing completion of NUCEF construction; Present status and prospects of NUCEF project

Tsujino, Takeshi; Naito, Yoshitaka; Maeda, Mitsuru; ; Hoshi, Michio; Izawa, Naoki; Takeshita, Isao; ; Okazaki, Shuji; Dojiri, Shigeru

Genshiryoku Kogyo, 40(5), p.9 - 59, 1994/00

no abstracts in English

Journal Articles

Analytic formula for fully relativistic Thomson scattering spectrum

Naito, Osamu; Yoshida, Hidetoshi; Matoba, Toru

Phys. Fluids B, 5(11), p.4256 - 4258, 1993/11

 Times Cited Count:51 Percentile:86.32(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Boundary element formulation of fission neutron source problems using only boundary integrals

; C.A.Brebbia*

Engineering Analysis with Boundary Elements, 8(5), p.239 - 244, 1991/10

 Times Cited Count:9 Percentile:76.25(Engineering, Multidisciplinary)

no abstracts in English

JAEA Reports

THRUSH: A code for calculating thermal neutron scattering kernel

*

JAERI-M 8927, 26 Pages, 1980/06

JAERI-M-8927.pdf:0.63MB

no abstracts in English

Journal Articles

Derivation of finite series of linearly independent spherical harmonics

Kumazawa, Shigeru

Denshi Tsushin Gakkai Rombunshi, A, 61(8), p.774 - 781, 1978/08

no abstracts in English

Journal Articles

A Spherical harmonic expansion method using the orthogonality for finite sum

Kumazawa, Shigeru

Denshi Tsushin Gakkai Rombunshi, A, 61-A(10), p.1053 - 1054, 1978/00

no abstracts in English

Journal Articles

Incommensurate phase in (ND$$_{4}$$)$$_{2}$$BeF$$_{4}$$

;

Solid State Communications, 22(1), p.37 - 39, 1977/01

 Times Cited Count:112

no abstracts in English

Journal Articles

Convergence and error estimate of perturbation method in reactor calculations

Journal of Nuclear Science and Technology, 13(8), p.413 - 422, 1976/08

 Times Cited Count:0

no abstracts in English

Oral presentation

Development of generalized area ratio method for subcriticality measurement

Katano, Ryota; Nishihara, Kenji; Tsujimoto, Kazufumi; Endo, Tomohiro*

no journal, , 

no abstracts in English

Oral presentation

Introduction of the promotion system of JAEA intellectual properties

Otsubo, Michiro

no journal, , 

no abstracts in English

Oral presentation

Monte Carlo criticality calculation of random media with bounded fluctuation due to normal noise

Ueki, Taro

no journal, , 

Monte Carlo particle transport calculation of random media is an effective means for evaluating the uncertainty of criticality. In this presentation, the author reports Monte Carlo criticality calculation methodology for the random media with bouded fluctuation modeled by superposed Brownian motion and implemented by Karhunen-Loeve expansion.

21 (Records 1-20 displayed on this page)