1994 Fiscal Year Annual Research Report

JMTR照射とRTNS‐II照射の比較による核分裂-核融合中性子照射損傷相関の研究

Research Project

Project/Area Number	04302063
Research Institution	Nagoya University
Principal Investigator	桐谷道雄名古屋大学, 工学部, 教授 (70033826)
Co-Investigator(Kenkyū-buntansha)	岡田亜紀良北海道大学, 工学部, 助教授 (40001341) 木下智見九州大学, 工学部, 教授 (50037917) 下村義治広島大学, 工学部, 教授 (40033831) 吉田直亮九州大学, 応用力学研究所, 教授 (00127317) 義家敏正京都大学, 原子炉実験所, 教授 (20124844)
Keywords	中性子照射 / 核融合中性子 / 核分裂中性子 / 原子炉照射 / 核分裂-格融合相関 / 照射損傷 / 核融合炉材料 / カスケード損傷
Research Abstract	核分裂炉および核融合中性子源による固体材料の照射損傷を、それぞれ系統的にその要素過程・素過程に分解して解析・理解することにより、相互の類似と相違を定量的に明らかにし、核融合炉材料開発に指針を与えるとともに、原子炉材料の改良に対しても基礎的・長期的立場から貢献することを目的として行った研究である。三カ年継続した研究の全体としての報告は、500ページにのぼる科学研究費補助金研究成果報告書に纏めつつあるため省略し、本年度特に力点を置いた研究項目についてその概要を述べる。1.多分割原子炉照射装置による欠陥蓄積モードの解明:照射温度を制御しつつ原子炉JMTRの稼動中に試料群を部分的に順次炉外に移送する照射を世界ではじめて実施した。多種の金属・合金でRTNS-II核融合中性子照射の場合と同性質の欠陥蓄積が観察され欠陥構造蓄積過程の類似点が確認された。また、照射量(損傷エネルギー)に対する両者の大きな差から、核分裂-核融合中性子照射損傷相関に関する知識・データが確実なものとなった。2.交番温度変動原子炉照射:照射中に温度を任意に上下させる交番温度変動照射をJMTRにおいて実行し、発生した欠陥構造の観察・解析から、低温側で発生した欠陥の高温側での重要な役割が明らかになった。欠陥構造発達の機構の理解に大きく貢献するとともに、原子炉等の実際の稼働時のシミュレーションとしても有益な知見が得られた。3.中性子照射した試料の超高圧電子顕微鏡による電子照射:名古屋大学超高圧電子顕微鏡室に放射線管理区域の設定が完了し、世界ではじめて中性子照射により放射化した試料の電子照射が可能となった。通常の観察のみでは判定の困難なカスケード衝突から直接発生した極微細点欠陥集合体の性質が、それらの電子照射下での挙動から明かとなり、主要な多くの材料についての長年の研究の基盤を確固なものとすることができた。

Research Products
(19 results)

All Other

All Publications (19 results)

[Publications] H.Fukushima: "Dependence of observed cascade defects on neutron spectrum and dose in Au and Ag irradiated with fission and fusion neutrons at low temperature" Journal of Nuclear Materials. 212-215. 154-159 (1994)
[Publications] T.Yoshiie: "Factors to influence the nucleation and growth of interstitial clusters during cascade damage" Journal of Nuclear Materials. 212-215. 186-191 (1994)
[Publications] M.Kiritani: "Formation of vacancy clustered defects from cascade collisions during heavy ion irradiation and their annihilatin by freely migrating interstitial atoms" Journal of Nuclear Materials. 212-215. 192-197 (1994)
[Publications] M.Kiritani: "Microstructure evolution by neutron irradiation during clyclic temperature variation" Journal of Nuclear Materials. 212-215. 241-245 (1994)
[Publications] M.Horiki: "Microstructural evolution in low dose neutron irradiated Fe‐15Ni‐15Cr alloy" Journal of Nuclear Materials. 212-215. 246-251 (1994)
[Publications] Q.Xu: "Effects of temperature variation on damage microstructures in Fe‐Cr‐Ni alloy induced by heavy ion irradiation" Journal of Nuclear Materials. 212-215. 258-262 (1994)
[Publications] K.Hamada: "Role of solute atoms on microstructural evolution in neutron irradiated nickel" Journal of Nuclear Materials. 212-215. 270-274 (1994)
[Publications] T.Yoshiie: "Effect of cascade localization enduced bias effect and fluctuation of point defect reactions on defect structure evolution near planar sinks" Journal of Nuclear Materials. 212-215. 315-319 (1994)
[Publications] Y.Shimomura: "Experiments to examine the contribution of the gaseous atoms on the void formation in irradiated metals" Journal of Nuclear Materials. 212-215. 352-357 (1994)
[Publications] A.Okada: "Mechanical property change in neutron irradiated Fe‐Cr and Fe‐Mn alloys and their defect structures" Journal of Nuclear Materials. 212-215. 382-387 (1994)
[Publications] N.Yoshida: "Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation" Journal of Nuclear Materials. 212-215. 471-475 (1994)
[Publications] H.Watanabe: "The influence of combined addition of phosphorus and titanium on void swelling of austenitic Fe‐Cr‐Ni alloys at 646‐700 K" Journal of Nuclear Materials. 212-215. 503-508 (1994)
[Publications] M.Narui: "Development of experimental rigs for temperature‐controlled reactor irradiation for fundamantal study of radiation effects on fusion materials" Journal of Nuclear Materials. 212-215. 1645-1648 (1994)
[Publications] M.Narui: "Development of controlled temperataure‐cycle irradiation technique in JMTR" Journal of Nuclear Materials. 212-215. 1665-1670 (1994)
[Publications] H.Watanabe: "Defect formation in austenitic stainless steels during shutdown procedure of FFTF" Journal of Nuclear Materials. 217. 178-186 (1994)
[Publications] K.Fukumoto: "The mechanism of radiation‐resistance of MgO・nAl_2O_3 through the formation process of defect clusters under irradiation" Nuclear Instruments and Methods in Physics Research. B91. 252-257 (1994)
[Publications] Y.Satoh: "Diffraction contrast image of small stacking fault tetrahedra in fcc metals" Philosophical Magazine. A70. 869-891 (1994)
[Publications] M.Kiritani: "Microstructure Evolution during Radiatoin Damage" Journal of Nuclear Materials. 216. 220-264 (1994)
[Publications] C.Kinoshita: "Radiation effects of ceramics and their characteristics" Materia Japan. 33. 1351-1355 (1994)

1994 Fiscal Year Annual Research Report

JMTR照射とRTNS‐II照射の比較による核分裂-核融合中性子照射損傷相関の研究

Principal Investigator

桐谷 道雄 名古屋大学, 工学部, 教授 (70033826)

Research Products

[Publications] H.Fukushima: "Dependence of observed cascade defects on neutron spectrum and dose in Au and Ag irradiated with fission and fusion neutrons at low temperature" Journal of Nuclear Materials. 212-215. 154-159 (1994)

[Publications] T.Yoshiie: "Factors to influence the nucleation and growth of interstitial clusters during cascade damage" Journal of Nuclear Materials. 212-215. 186-191 (1994)

[Publications] M.Kiritani: "Formation of vacancy clustered defects from cascade collisions during heavy ion irradiation and their annihilatin by freely migrating interstitial atoms" Journal of Nuclear Materials. 212-215. 192-197 (1994)

[Publications] M.Kiritani: "Microstructure evolution by neutron irradiation during clyclic temperature variation" Journal of Nuclear Materials. 212-215. 241-245 (1994)

[Publications] M.Horiki: "Microstructural evolution in low dose neutron irradiated Fe‐15Ni‐15Cr alloy" Journal of Nuclear Materials. 212-215. 246-251 (1994)

[Publications] Q.Xu: "Effects of temperature variation on damage microstructures in Fe‐Cr‐Ni alloy induced by heavy ion irradiation" Journal of Nuclear Materials. 212-215. 258-262 (1994)

[Publications] K.Hamada: "Role of solute atoms on microstructural evolution in neutron irradiated nickel" Journal of Nuclear Materials. 212-215. 270-274 (1994)

[Publications] T.Yoshiie: "Effect of cascade localization enduced bias effect and fluctuation of point defect reactions on defect structure evolution near planar sinks" Journal of Nuclear Materials. 212-215. 315-319 (1994)

[Publications] Y.Shimomura: "Experiments to examine the contribution of the gaseous atoms on the void formation in irradiated metals" Journal of Nuclear Materials. 212-215. 352-357 (1994)

[Publications] A.Okada: "Mechanical property change in neutron irradiated Fe‐Cr and Fe‐Mn alloys and their defect structures" Journal of Nuclear Materials. 212-215. 382-387 (1994)

[Publications] N.Yoshida: "Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation" Journal of Nuclear Materials. 212-215. 471-475 (1994)

[Publications] H.Watanabe: "The influence of combined addition of phosphorus and titanium on void swelling of austenitic Fe‐Cr‐Ni alloys at 646‐700 K" Journal of Nuclear Materials. 212-215. 503-508 (1994)

[Publications] M.Narui: "Development of experimental rigs for temperature‐controlled reactor irradiation for fundamantal study of radiation effects on fusion materials" Journal of Nuclear Materials. 212-215. 1645-1648 (1994)

[Publications] M.Narui: "Development of controlled temperataure‐cycle irradiation technique in JMTR" Journal of Nuclear Materials. 212-215. 1665-1670 (1994)

[Publications] H.Watanabe: "Defect formation in austenitic stainless steels during shutdown procedure of FFTF" Journal of Nuclear Materials. 217. 178-186 (1994)

[Publications] K.Fukumoto: "The mechanism of radiation‐resistance of MgO・nAl_2O_3 through the formation process of defect clusters under irradiation" Nuclear Instruments and Methods in Physics Research. B91. 252-257 (1994)

[Publications] Y.Satoh: "Diffraction contrast image of small stacking fault tetrahedra in fcc metals" Philosophical Magazine. A70. 869-891 (1994)

[Publications] M.Kiritani: "Microstructure Evolution during Radiatoin Damage" Journal of Nuclear Materials. 216. 220-264 (1994)

[Publications] C.Kinoshita: "Radiation effects of ceramics and their characteristics" Materia Japan. 33. 1351-1355 (1994)

桐谷道雄名古屋大学, 工学部, 教授 (70033826)