| Project/Area Number |
25400307
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | High Energy Accelerator Research Organization |
|---|
Principal Investigator |
Oyama Yuichi 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 講師 (30213896)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
山田 善一 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 教授 (00200759)
石田 卓 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 研究機関講師 (70290856)
|
|---|
| Project Period (FY) |
2013-04-01 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| Keywords | ニュートリノ / J-PARC / T2K / ビームライン / 放射線 / ベリリウム / 放射化水 / 放射化水処理 / イオン交換樹脂 / 大強度陽子ビーム / Ｊ－ＰＡＲＣ / Ｔ２Ｋ |
|---|
| Outline of Final Research Achievements |
In J-PARC neutrino facility, cooling water for beam line instruments are highly radioactivated.To dispose the radioactive water, radioactive source such as 7Be should be removed by ion-exchanger. Efficient radioactive sources from water were studied.Using the circulation system for ion-exchangers, the reduction efficiency of 7Be was 99.99%. This is good number even when the beam power is increase to 750kW, which is the present goal of the operation. No deterioration of ion-exchanger was found. On the other hand, the time for the ion-exchanger circulation will be limited in future because more frequent disposal of the radio active water is required from the concentration of 3H. It was found that maintenance for pre- and post-filters as well as circulation pump are very important for future upgrade of the beam power, Facility upgrade such as larger flow in the ion-exchanger circulation system and multiple buffer tank will be needed.
|
