Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 20
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

JAEA Reports

Study on the applicability of the fiber-optic crack detection sensor as a safety technology (FY2015-FY2018) (Joint research)

Kono, Masaru*; Hayama, Kazunori*; Matsui, Hiroya; Ozaki, Yusuke

JAEA-Technology 2019-011, 35 Pages, 2019/07

JAEA-Technology-2019-011.pdf:2.65MB

To verify long-term safety performance of the sensor for decades, we decided the extension of the collaborative research and the evaluation test of long-term durability of fiber-optic crack detection sensor developed by Tokyo Measuring Instruments Laboratory Co., Ltd. at the Mizunami Underground Research Laboratory were continued from FY 2015 to FY 2018. As a result, the measurement system using of the fiber-optic crack detection sensor is applicable for long-term measurement in deep underground area and find the future subject.

Journal Articles

Measurement of beam energy spread of the JAERI AVF cyclotron

Okumura, Susumu; Miyawaki, Nobumasa; Kurashima, Satoshi; Yoshida, Kenichi; Kashiwagi, Hirotsugu; Fukuda, Mitsuhiro; Ishibori, Ikuo; Agematsu, Takashi; Nara, Takayuki; Nakamura, Yoshiteru

JAEA-Review 2005-001, TIARA Annual Report 2004, p.352 - 354, 2006/01

no abstracts in English

Journal Articles

Development of beam energy width measurement system with microslits

Okumura, Susumu; Ishibori, Ikuo; Fukuda, Mitsuhiro; Miyawaki, Nobumasa; Kurashima, Satoshi; Agematsu, Takashi; Nara, Takayuki; Yoshida, Kenichi; Nakamura, Yoshiteru; Arakawa, Kazuo

Dai-14-Kai Kasokuki Kagaku Kenkyu Happyokai Hokokushu, p.518 - 520, 2003/00

no abstracts in English

JAEA Reports

Water permeability test of rock specimen with natural fractures using high viscosity liquid

*;

JNC-TN8430 2001-006, 72 Pages, 2001/10

JNC-TN8430-2001-006.pdf:1.71MB

We had been conducted to study hydraulic permeability along fracture intersection by NETBLOCK system using natural rock specimen. Since the permeability of this rock specimen fracture is high, it was suggest that turbulent flow might be occurred in available range of measurement system. In case of turbulent flow, estimated permeability and fracture aperture from test data tend to be low. Therefore we should achieve laminar flow. This study was used the high viscosity liquid instead of water, and test conditions which could attain laminar flow with the rock specimen was examined. The rock specimen is granite rock, has natural Y-type fractures intersection. A solution of Methyl-cellulose is used as high viscosity liquid. Due to the high viscosity liquid, hydraulic head could be measured in the wide range, and high viscosity liquid improved the accuracy of measurement. Laminar flow could be achieved in the rock specimen by the high viscosity liquid over 0.1wt%.

JAEA Reports

Examination of hydraulic property of natural rock specimen

*; *;

JNC-TN8430 2001-003, 64 Pages, 2001/03

JNC-TN8430-2001-003.pdf:2.15MB

Handling methods and test conditions of hydraulic tests for NETBLOCK system had been examined by using acrylic and/or artificial rock specimen. A natural rock specimen (granite : excavated from Kamaishi mine) with fracture intersection was formed into practicable size for NETBLOCK system. Recently, we conducted a series of hydraulic test, in order to study the influence of fracture intersection by using the natural rock specimen. Hydraulic tests were conducted under several centimeters of head, which could be controlled by improved system because hydraulic permeability of target fractures were high. As a result, 10$$^{-4}$$$$sim$$10$$^{-5}$$(m$$^{2}$$/s) orders of hydraulic transmissivity of target fractures could be measured. A low permeability in the NW direction at the lower fracture was estimated from the heterogeneous head distribution. However, it is also expected that turbulence flow might be occurred under this study condition because fracture permeability is high and flow rate through the fracture is relatively high. In case of turbulence-flow, an estimated hydraulic transmissivity is low. High-viscosity fluid hydraulic test to achieve laminar flow will be needed for correcting an evaluated transmissivity.

JAEA Reports

A study on improvements in accuracy of nuclear data measurements using $$gamma$$-ray spectroscopic methods

Furutaka, Kazuyoshi

JNC-TN8400 2000-028, 70 Pages, 2000/10

JNC-TN8400-2000-028.pdf:1.71MB

This report describes the study done by the author as a postdoctoral research associate at Japan Nuclear Cycle Development Institute. This report is divided into two parts: improvements in accuracy in determination of thermal neutron capture cross sections, and improvements in accuracy of photo-nuclear absorption cross section measurements using the HHS. (1)In the measurements of thermal neutron capture cross sections using an activation method, accuracies of the final results attained are limited by (1) accuracy of $$gamma$$-ray peak detection efficiencies, and (2) accuracies of $$gamma$$-ray emission probabilities. In this study; to determine thermal neutron capture cross sections more accurately, the following researches have been done using a newly developed three-dimensional coincidence measurement system: (1)accurate determination of $$gamma$$-ray standard sources using a $$gamma$$-$$gamma$$ coincidence method, for precise calibration of $$gamma$$-ray peak detection efficiency, and (2) development of a $$beta$$-$$gamma$$ coincidence measurement system using a plastic scintillation detector as a $$beta$$-ray detector, for the determination of $$gamma$$-ray emission probabilities of short-lived nuclides, and measurement of $$gamma$$-ray emission probabilities of $$^{100}$$Tc nuclide using the coincidence system. (2)To transform radioactive nuclides with small thermal neutron capture cross sections, use of photonuclear absorption reaction has been suggested. In order to transform these nuclides efficiently using the reaction, one has to know detailed behavior of the photo-absorption cross sections. In this study, a Monte-Carlo simulation code has been used to create a standard set of $$gamma$$-ray response functions of the high-resolution high-energy spectrometer (HHS), to enable reliable analyses of the data obtained by the spectrometer.

JAEA Reports

None

*; *; ; Aoto, Kazumi

JNC-TY9400 2000-010, 138 Pages, 2000/03

JNC-TY9400-2000-010.pdf:5.15MB

None

JAEA Reports

None

*; *; *; *

JNC-TJ7440 2000-002, 74 Pages, 2000/02

JNC-TJ7440-2000-002.pdf:4.7MB

no abstracts in English

JAEA Reports

None

PNC-TN1430 97-001, 28 Pages, 1997/01

PNC-TN1430-97-001.pdf:1.3MB

no abstracts in English

JAEA Reports

None

PNC-TJ8205 96-001, 33 Pages, 1996/02

PNC-TJ8205-96-001.pdf:4.72MB

no abstracts in English

JAEA Reports

None

*

PNC-TJ7422 95-002, 119 Pages, 1995/08

PNC-TJ7422-95-002.pdf:4.36MB

no abstracts in English

JAEA Reports

None

*; *; *; *; *

PNC-TJ1678 95-002, 121 Pages, 1995/02

PNC-TJ1678-95-002.pdf:4.83MB

None

JAEA Reports

None

Mikami, Satoshi; ; Momose, Takumaro

PNC-TN8410 95-319, 60 Pages, 1995/01

PNC-TN8410-95-319.pdf:0.99MB

None

JAEA Reports

Introduction of Nuclear Instrumentations and Radiation Measurements in Experimental Fast Reactor 「JOYO」

;

PNC-TN9420 92-005, 83 Pages, 1992/04

PNC-TN9420-92-005.pdf:2.17MB

This report introduces the nuclear instrumentation system and major R&D (research and development) activities using radiation measurement techniques in Experimental Fast Reactor "JOYO". In the introduction of the nuclear instrumentation system, following items are described; (1)system function (2)roles as a reactor plant equipment (3)specifications and charactelistics of neutron detectors, (4)construction and layout of the system. For reactor dosimetry at various irradiation tests and surveillance tests, multi-foil method employed in "JOYO", neutron fluence evaluation using activation foils and HAFM (Helium Accumulation Fluence Monitor) under development are described briefly. The failed fuel detection system and some experimental equipments using radiation measurement techniques are also introduced here with main results obtained by a series of fuel failure simulation experiments. In addition, following R&Ds are picked up as some examples based on radiation measurement technology; (1)burn-up measurement of spent fuel subassembly (2)measurement and evaluation of radiation source distributions (radioactive corrosion products)

JAEA Reports

None

PNC-TJ1545 92-004, 253 Pages, 1992/03

PNC-TJ1545-92-004.pdf:8.71MB

no abstracts in English

JAEA Reports

None

Hirata, Yoichi*

PNC-TJ1439 92-001, 67 Pages, 1992/02

PNC-TJ1439-92-001.pdf:1.49MB

None

JAEA Reports

Real Time Item Accounting System(RIAS) of Spent Fuel at the Receiving and Storage Areas

Ogata, Yoshiaki; Ochiai, Kazuya; ; ;

PNC-TN8410 91-276, 76 Pages, 1991/11

PNC-TN8410-91-276.pdf:2.09MB

None

JAEA Reports

None

PNC Can*

PNC-TN7410 89-010, 46 Pages, 1988/11

PNC-TN7410-89-010.pdf:0.86MB

None

Journal Articles

None

NE-83-2, p.13 - 18, 1983/00

no abstracts in English

JAEA Reports

None

; ; ; Murano, Toru*; Wakabayashi, Hiroaki*; Yoshii, Koji*

PNC-TN841 77-06, 76 Pages, 1976/03

PNC-TN841-77-06.pdf:4.64MB

no abstracts in English

20 (Records 1-20 displayed on this page)
  • 1