目　　次

■ 報　　告
日本と異なるスイスの暮らし ( 3 )
友藤　洋

■ 紹　　介
高速増殖原型炉もんじゅ
廃止措置と燃料体取出し作業に向けて ( 6 )
古賀和浩 / 鈴木和則 / 浜野知治 / 高木剛彦
プラント過渡応答試験装置（PLANDTL）試験部の更新 (12)
内山尚基 / 小澤達也 / 佐藤康士 / 小林　順 / 小野島貴光 / 田中正暁
原子力発電プラントにおける復水脱塩技術の改善：その２
−イオン交換理論および復水脱塩装置の再生設備の改善− (19)
出水丈志

■ グループ情報
福島第一原子力発電所訪問について (24)
石黒修司
FAPIGの機構 (26)

表紙デザイン：島村俊行

CONTENTS

■ Report
My Experience in Switzerland Different from the Way of Living in Japan ( 3 )
H. Tomofuji

■ Introduction
Prototype Fast Breeder Reactor "Monju" Decommissioning and Unloading Operation of the Fuel Assembly from the Core ( 6 )
K. Koga / K. Suzuki / T. Hamano / T. Takagi
Upgrade and Replacement of Plant Dynamics Test Loop（PLANDTL） (12)
N. Uchiyama / T. Ozawa / K. Satou J. Kobayashi / T. Onojima / M. Tanaka
Improvement of the Performances of Condensate Demineralizers in Nuclear Power Plants（2）
Ion-exchange Theory and Improvement on Regeneration System of Condensate Demineralizers in Nuclear Power Plants (19)
T. Izumi

■ FAPIG Activity
Visit to Fukushima No.1 Nuclear Power Station Site (24)
S. Ishiguro

Cover Design：Toshiyuki Shimamura

SYNOPSES

Hiroshi Tomofuji
My Experience in Switzerland Different from the Way of Living in Japan FAPIG No. 194 pp.3 to 5 (2018)

"Einstein", "Heidi", "Federer", "Wawrinka" and "Permanent Neutral Country". Though these are examples related to Switzerland/Swiss, there might be difficult for many people to imagine what Switzerland is like or what typical Swiss thinks in their mind. As I had a chance to stay at ETH Zurich as a researcher by taking advantage of company internal go-abroad education system, I stayed at Zurich for two years together with my family. I would like to report the way of living in Switzerland, education and work which are different from those in Japan.

KEYWORDS：Switzerland, Sechselauten, ETH Zurich

Kazuhiro Koga,　Kazunori Suzuki, Tomoharu Hamano, Tsuyohiko Takagi Prototype Fast Breeder Reactor "Monju" Decommissioning and Unloading Operation of the Fuel Assembly from the Core FAPIG No. 194 pp.6 to 11 (2018)

The prototype fast breeder reactor "Monju" was decided to decommission policy by Japanese government on 21 December 2016. After that, Japan Atomic Energy Agency (JAEA) submitted "Monju decommissioning basic plan" to MEXT (Charge ministry) on 13 June 2017, then the unloading operation period (about 5.5 years) of the fuel assembly, which is the first stage of decommission, has started.
Fuji Electric is proceeding with various preparations in cooperation with JAEA for the safe work of the unloading operation.
This manuscript introduces the outline of preparation situation such as maintenance and inspection for the unloading operation.

KEYWORDS：fast reactor, Monju, decommission, unloading

Naoki Uchiyama, Tatsuya Ozawa, Kouji Satou, Jun Kobayashi, Takamitsu Onojima, Masaaki Tanaka
Upgrade and Replacement of Plant Dynamics Test Loop（(PLANDTL)）
FAPIG No. 194 pp.12 to 18 (2018)

Japan Atomic Energy Agency (JAEA) aims to diversify the decay heat removal system as the moderating approach of severe accident progress in order to sophisticate the safety of the sodium cooled fast reactor. JAEA is progressing the enhancement of Plant Dynamics Test Loop (PLANDTL) in Oarai Development and Research Center. JAEA will demonstrate the heat and flow phenomena at the decay heat removal by natural convection in the reactor vessel by using PLANDTL.
Kawasaki Heavy Industries (KHI) had got ordered from JAEA and constructed the simulated reactor core, upper plenum, and internal structure of the reactor vessel during FY2014 to 2016. This document shows the manufacturing and the construction of the above mentioned components.

KEYWORDS： decay heat removal system for sodium cooled fast reactor, plant safety research, severe accident

Takeshi Izumi
Improvement of the Performances of Condensate Demineralizers in Nuclear Power Plants (2)
Ion-exchange Theory and Improvement on Regeneration System of Condensate Demineralizers in Nuclear Power Plants FAPIG No. 194 pp.19 to 23 (2018)

In nuclear power plants, it is needed to keep the water quality of reactors or steam generators extremely clean from the viewpoints of the reduction of the radiation exposure and maintenance of the reliability of plant materials. In order to meet these requirements, the role of the condensate demineralizers and the ion exchange resins are very important. Furthermore, the requirements of water quality have been upgrading compared to them in 1970's.
In these 4 reports, the performances and these improvements of condensate demineralizers and ion exchange resins are introduced. On this second report, the ion-exchange theory and the improvements on regeneration system of condensate demineralizing technologies are reported.

KEYWORDS：ion exchange resins, condensate demineralizers, regeneration system