Molecular analysis of heavy ion induced mutations in budding yeast

Matsuo, Yoichiro*; Izumi, Yoshinobu*; Hase, Yoshihiro; Sakamoto, Ayako; Shimizu, Kikuo*

JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013, P. 119, 2015/03

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2014-050.pdf#page=151

https://doi.org/10.11484/jaea-review-2014-050

no abstracts in English

Investigation on analytical method for the transfer behavior of corrosion product (CP) in the fast breeder reactors

Matsuo, Yoichiro; Sasaki, Shinji

JAEA-Review 2013-007, 46 Pages, 2013/05

JAEA-Review-2013-007.pdf:4.68MB

Radioactive corrosion products (CP) are main cause of personal radiation exposure during maintenance without fuel failure in FBR plants. The most important CP species are Mn and Co. The deposited radioactive CP cause radiation fields near the piping and components. Then, the deposited radioactive CP contributes to the radiation exposure of the plant-worker. In this review, firstly, collects knowledge about CP transfer behavior in the fast reactor and analyzes it and organize essence of the CP transfer behavior. Secondly, existing method to parse CP transfer behavior is investigated and extracts the issues and discusses it about the solution of those issues. Finally, about a specific example of the improvement based on the solution, a recent trend is investigated and describes evaluated content.

Simulation of radioactive corrosion product in primary cooling system of Japanese sodium-cooled fast breeder reactor

Matsuo, Yoichiro; Miyahara, Shinya; Izumi, Yoshinobu*

Journal of Power and Energy Systems (Internet), 6(1), p.6 - 17, 2012/03

https://doi.org/10.1299/jpes.6.6

Radioactive corrosion product (CP) is a main cause of personal radiation exposure during maintenance with no breached fuel in fast breeder reactor (FBR) plants. In order to establish techniques of radiation dose estimation for radiation workers in radiation-controlled areas of the FBR, the PSYCHE (Program SYstem for Corrosion Hazard Evaluation) code was developed. We add the Particle Model to the conventional PSYCHE analytical model. In this paper, we performed calculation of CP transfer in JOYO using an improved calculation code in which the Particle Model was added to the PSYCHE code. The C/E (calculated / experimentally observed) value for CP deposition was improved through use of this improved PSYCHE code incorporating the Particle Model.

Predictive analysis of the radiation exposure for the primary cooling system of the rated power operation of MONJU

Matsuo, Yoichiro; Hasegawa, Masanori; Maegawa, Yoshiharu; Miyahara, Shinya

Hoken Butsuri, 46(4), p.304 - 313, 2011/12

https://doi.org/10.5453/jhps.46.304

Radioactive corrosion products (CP) are main source of personal radiation exposure during maintenance without fuel-failure accident in the liquid-metal fast breeder reactor (LMFBR) plants. In order to establish the techniques of radiation dose estimation for personnel, program system DORE has been developed. The DORE system is constructed by PSYCHE code and QAD code system. The density of each deposited CP of primary coolant system in MONJU was estimated by using the PSYCHE. Moreover, the QAD-CGGP2R code is applied to dose rate calculations for the primary coolant system in MONJU. The predicted values were estimated to be saturated at 2-3 mSv/h in twenty years after the start of operation, and the dose rate reaches 4 mSv/h in domains near the IHX and the cold-leg piping.

Molecular analysis of carbon ion induced mutations in yeast cells

Shimizu, Kikuo*; Matsuo, Yoichiro*; Izumi, Yoshinobu*; Hase, Yoshihiro; Nozawa, Shigeki; Sakamoto, Ayako; Narumi, Issei

JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 79, 2011/01

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2010-065.pdf

Prediction of radioactive corrosion product transfer in primary systems of Japanese prototype fast breeder reactor Monju

Matsuo, Yoichiro; Hasegawa, Masanori; Maegawa, Yoshiharu; Miyahara, Shinya

Proceedings of 18th International Conference on Nuclear Engineering (ICONE-18) (CD-ROM), 8 Pages, 2010/05

https://doi.org/10.1115/ICONE18-29171

Radioactive corrosion products are main cause of personal radiation exposure during maintenance with no breached fuel in FBR plants. CP is produced in the core region by activation of fuel cladding and sub-assembly wrappers, and they are transported to the primary circuit with sodium flow and deposited on the wall of the primary piping and components. In order to establish the techniques of radiation dose reduction for of personnel, program system for corrosion hazard evaluation code PSYCHE has been was developed. The PSYCHE code is based on the solution-precipitation model. The density of each deposited CP and dose rate of primary coolant system in Monju was estimated by using the PSYCHE and QAD-CG code.

Study on molecular mechanism of high-LET carbon ion beam induced mutations in

Matsuo, Yoichiro*; Nishijima, Shigehiro*; Hase, Yoshihiro; Sakamoto, Ayako; Narumi, Issei; Shimizu, Kikuo*

JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 60, 2008/11

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2008-055.pdf

no abstracts in English

Study of molecular mechanism of ion beam induced mutations in the

Matsuo, Yoichiro*; Nishijima, Shigehiro*; Hase, Yoshihiro; Sakamoto, Ayako; Tanaka, Atsushi; Shimizu, Kikuo*

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 76, 2007/02

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2006-042.pdf

no abstracts in English

LET dependency of DNA double strand break repair that affects radiation sensitivity

Matsuo, Yoichiro*; Izumi, Yoshinobu*; Hase, Yoshihiro; Sakamoto, Ayako; Shimizu, Kikuo*

no journal, , 

no abstracts in English

Carbon ion-beam induced mutagenesis in budding yeast

Shimizu, Kikuo*; Matsuo, Yoichiro*; Izumi, Yoshinobu*; Nozawa, Shigeki; Hase, Yoshihiro; Sakamoto, Ayako; Tanaka, Atsushi

no journal, , 

no abstracts in English