FAPIG誌 最新号目次

2005−3/平成16年度 第3号(No.169)


目  次

■ 報  告
海水ウラン採取用のモール状捕集材の合成と実規模システムの検討 ( 3 )
玉田正男 / 瀬古典明 / 笠井 昇 / 清水隆夫

■ 紹  介
C/C複合材の構造健全性に関する研究 (13)
辻 延昌 / 柴田大受 / 角田淳弥 / 石原正博 / 伊与久達夫
3次元構造に対する1次応力評価手法の開発 (18)
定廣大輔 / 柴本 宏 / 長島英明 / 笠原直人 /井上和彦
構造ヘルスモニタリングシステムの開発 (23)
施設管理システムの紹介 (27)
阿邉川仁 / 鈴木美和

■ 論  文
石炭価格高騰等で有利となる原子力発電 (32)

■ 随  筆
中山道一人旅(その5) 〜近江路を歩く〜 (42)

■ グループ情報
FAPIGの機構 (49)



■ Report
Synthesis and Practical Scale System of Braid
Adsorbent for Uranium Recovery from Seawater ( 3 )
M. Tamada / N. Seko / N. Kasai / T. Shimizu

■ Introduction
Study on Structural Integrity of C/C Composite
Using as Core Restraint Mechanism in HTGR (13)
N. Tsuji / T. Shibata / J. Sumita / M. Ishihara / T. Iyoku
The Study on Evaluation Method for Primary Stress of 3-D Structure (18)
D. Sadahiro / H. Shibamoto / H. Nagashima / N. Kasahara / K. Inoue
Development on Structural Health Monitoring System (23)
H. Kumagai
Facility Management System Promotion (27)
H. Abekawa / Y. Suzuki

■ Paper
The Advantages of Nuclear Power in the Wake of the Soaring Prices of Coal (32)
T. Tanabe

■ Essay
Sentiment of Solitary Journey on Nakasendo
− Hike Through Oumiji − (42)
M. Yoneda

Cover Design:Yoshiaki Uesugi


Masao Tamada, Noriaki Seko, Noboru Kasai, Takao Shimizu
Synthesis and Practical Scale System of Braid Adsorbent for Uranium Recovery
from Seawater
FAPIG No. 169 pp.3〜12 (2005)

Braid adsorbent having functional group of amidoxime is a promising material for the recovery of uranium dissolved in the seawater. This braid adsorbent was made by polyethylene multi-fibers in which amidoxime groups were introduced by radiation-induced graft polymerization and subsequent chemical treatment. Reaction time for graft polymerization was 5h and the resulted braid adsorbent had 2.8mmol/g-adsorbent of amidoxime group. The braid adsorbent obtained was moored at the offing of Okinawa Island. The adsorption of uranium reached 1.5g/kg-adsorbent for 30d soaking. The mooring system for braid adsorbent has possibility which reduces the cost for the recovery of uranium from seawater. It is shown that 134km2 of mooring area is needed for annual product of 1200 tons of uranium. In addition, there is 6000km2 and more of suitable sea area for the collection of the uranium in the regions from Okinawa Islands to Tosa Bay in Japan.

KEYWORDS:recovery of uranium, seawater, braid adsorbent, amidoxime, graft polymerization, marine experiment, uranium adsorption, mooring system, sea area

Nobumasa Tsuji, Taiju Shibata, Junya Sumita, Masahiro Ishihara, Tatsuo Iyoku
Study on Structural Integrity of C/C Composite
Using as Core Restraint Mechanism in HTGR
FAPIG No. 169 pp.13〜17 (2005)

High temperature gas cooled nuclear reactor (HTGR) with higher outlet coolant temperature nearly 1000℃ is expected for utilization of hydrogen production. The thermal analysis with 3 dimensional, flow paths coupled model was conducted to demonstrate how strictly PSR block gaps must be closed to limit core bypass flow rate ratio lest fuel temperature should be remained in admissible level, and the highly heat resistant core restraint mechanism must be developed in consequence. Potential applicability of the core restraint mechanism made of C/C composite, the attractive candidate material, was demonstrated by point design with adequate thickness and FEM stress analysis for material with orthotropic anisotropy.

KEYWORDS:HTGR, core restraint mechanism, C/C composite, core bypass flow

Daisuke Sadahiro, Hiroshi Shibamoto, Hideaki Nagashima, Naoto Kasahara, Kazuhiko Inoue
The Study on Evaluation Method for Primary Stress of 3-D Structure
FAPIG No. 169 pp.18〜22 (2005)

This paper describes an evaluation method of primary stress in 3-D structures. In "Design by Analysis" for nuclear components, the stresses in structures are classified into the primary and the secondary stresses. The primary stress in axisymmetric structures can be evaluated by linealization of stress distribution in the specified section, but it is difficult to define the evaluation section in the 3-D structures, and to evaluate the primary stress with the conventional procedure. From this reason, the alternative evaluation method is needed.
In this paper, the evaluation method of primary stress in 3-D structures is presented utilizing the feature of primary stress that is independent from stress re-distribution.

KEYWORDS:nuclear components, primary stress, stress classification, stress redistribution

Hitoshi Kumagai
Development on Structural Health Monitoring System
FAPIG No. 169 pp.23〜26 (2005)

The authors have developed "structural health monitoring system" comprised of sensing, data processing, and diagnosis subsystems, for building and civil infrastructure. In this paper, application of this SHM system to the actual buildings with vibration suppression system and base isolation system are introduced. Internet-based data processing and analysis system is also successfully utilized in these buildings.

KEYWORDS:structural health monitoring, fiber optic sensing, internet based system

Hitoshi Abekawa, Yoshikazu Suzuki
Facility Management System Promotion
FAPIG No. 169 pp.27〜31 (2005)

In Fujitsu, we have been developing, and providing the facilities management systems for a quarter of century.
The system described in this article as an efficient facility management system is called Futuric/B. Fujitsu provides Futuric/B in cooperation with the Shibusawa Warehouse Ltd. installation system.
The movement to make this facilities management system open is also getting stronger day by day.
Since October 2003, the needs for a system to be compatible with the BACnet protocol (approved by the ISO standard) have increased, and the equipment side and the intelligence have advanced resulting in an increase in a number of products that are compatible with the LonWorks.
Today, Fujitsu is proud to present the facilities management system (Futuric/SX) that is compatible with the BACnet and the LonWorks. Futuric/SX has been developed, commercialized, and added to the line of our products.
The article gives an outline of the newly developed functions in the facilities management system and it talks about the features of each of equipment.

KEYWORDS:the facilities management systems, for a quarter of century, the BACnet protocol, the LonWorks

Toshinori Tanabe
The Advantages of Nuclear Power in the Wake of the Soaring Prices of Coal
FAPIG No. 169 pp.32〜41 (2005)

The cost of coal fueled energy production is twice the cost of long-term nuclear power generation. The direct reason for this is the soaring price of coal, which has reached a height not attained in a quarter of a century. Like crude oil in countries such as China, it is expected to be short in supply and short in demand for some time coming. While many look to the development of new energy mechanisms such as solar energy panels and wind turbines, the increase in extreme weather brought about by changes in the global climate sheds doubt on the effectiveness of these methods. In the 21st century, as we witness great changes in our global environment and energy utilization, the advantages of nuclear power generation in terms of costs, global warming measures, and resource conservation are being increasingly recognized. Now is the time to capitalize on these advantages. Responsible explanations about the safety of nuclear power are needed in order to restore the peopleユs trust in this resource. Meanwhile, we should push forward with those projects that have clearly demonstrated their safe utilization of nuclear reactor technologies.

KEYWORDS:Japan nuclear power, global warming, industrial reform policy







168 2004/11
167 2004/ 7
166 2004/ 3
165 2003/11
164 2003/ 7
163 2003/ 3
162 2002/11
161 2002/ 7
160 2002/ 3
159 2001/11