ダイバ-タ模擬試験装置を用いた新しいヘリウム灰排出法の研究

ダイバ-タバイアスを利用したヘリウム灰選択排出に関する粒子シミュレ-ションモンテカルロ粒子シミュレ-ションコ-ドにより、ヘリウム灰の選択排出特性の評価を行い、以下の結果を得た。 (1)ACATコ-ドによるイオン反射の計算から、ダイバ-タ板へのイオンの入射角が50〜60度を越えるあたりから反射粒子の角度分布が余弦分布からずれることが判明した。したがって、イオン温度が高い場合や、シ-ス電圧によるイオンの加速エネルギ-が低い場合にはダイバ-タ板へのイオンの斜め入射の効果を取り入れて粒子反射を扱う必要がある。 (2)ダイバ-タバイアスによるイオン入射エネルギ-の制御とダイバ-タ板及びポンプダクト構造の最適化により、燃料粒子である重水素、トリチウムとヘリウム灰との選択的排出が可能であることが示された。ポンプダクト部で得られたヘリウム灰粒子の濃縮率は約3であった。ダイバ-タ模擬試験装置を用いた粒子反射過程の解明に関する実験小型のダイバ-タ模擬試験装置Co-NAGDISにおいて、ダイバ-タ板を模擬するグラファイト又はモリブデン板からの反射中性粒子の反射角度分布を質量分析器により測定し、以下の予備的結果を得た。 (1)ダイバ-タ板からの反射中性粒子数は、磁力線とダイバ-タ板面の法線とのなす角度が約45度の時にピ-クを持つ角度分布を有する。この結果は、反射粒子の角度分布を余弦分布としたときの結果と定性的に一致する。 (2)ヘリウム、アルゴン等の動作ガス種とタ-ゲット板材質の組み合わせを変えて、反射中性粒子数の相対的変化を調べた結果、重い金属であるモリブデン板の方が炭素板に比べて顕著な角度分布を示した。この結果は、固体表面におけるイオン反射の素過程が入射粒子とタ-ゲット材料粒子との間の弾性衝突に基づくことから予測されるものと定性的に一致する。科学研究費補助金 研究種目:一般研究(B) 課題番号:90213339 研究代表者:上杉 喜彦 研究期間:1993-1994年度research repor

放射性廃棄物の長期管理施設の立地調査受容における感情，手続き的公正，信頼が及ぼす影響

Disposal of designated waste that is radioactive contaminated by the Fukushima nuclear accident is a primary issue in Japan. This study examined the determinants of public acceptance of siting a repository for designated waste, focusing on affective reaction, procedural fairness, and trust. The study presumed that affective reaction moderates the effects of procedural fairness and trust on public acceptance. To examine the presumption, the study implemented a hypothetical scenario experiment that manipulated two factors: an opportunity of voice as an antecedent of procedural fairness and similarity value to the authority as a component of trust. 289 people participated in the web-based experiment. Participants were randomly assigned to one of four conditions: procedural fairness (voice vs. no voice) × trust (similarity vs. no similarity) factorial design associated with acceptance of siting investigation for designated waste. The experiment measured affective reaction to the siting, and evaluations of procedural fairness, trust, public acceptance in the decision-making process. Results indicated that affective reaction, procedural fairness, and trust determined public acceptance. Moreover, the interactive effect of affective reaction × trust was found. A process analysis indicated that the effect of trust on public acceptance was strengthened when the affective reaction was negative. However, the interactive effects of affective reaction × procedural fairness and trust × procedural fairness were not found. The study showed that trust was susceptible to affect. This study suggested the significance of trust for people with a strong affective reaction in promoting the public acceptance of siting a facility for designated waste.本研究は文部科学省科学研究費基盤B（課題番号：16H03011，研究代表者：広瀬幸雄）の補助を受けて実施された．departmental bulletin pape

高レベル放射性廃棄物の管理方策の選択に関する意思決定プロセス : スイスと英国を例として

The purpose of our study is to understand decision-making process on selection of management policy for high-level radioactive waste. We compared decision-making process between Switzerland and UK by document review. The resuls show that decision-making process in both Swizerland and UK have similar features on flow of decision-making, comparative criteria for selecting options of management policy, and trade-off regarding intergenerational faireness, except for manner of public participation. The decision-making was performed extraction of options, establishment of comparative criteria, assessment and selection of options in turn. As comparative criteria, safety and intergenerational faireness etc. were considered to be important. The position of 'Deal with it now by waste disposal' emphasizing the responsibility of the present generation had a trade-off relation with that of 'Leave it until later by long-term storage' emphasizing the rights of future generations. The sense of values, recusing HLW repository as so-called troublesome facility agaist future and present generation, appeared to be mitigated through the consideration of trade-off relation described above. As a result, both coutries have chosen geological disposal considering reversibility of decisions and retrievability of radioactive waste.本研究は文部科学省科学研究費基盤B（課題番号16H03011，研究代表者 広瀬幸雄）の補助を受けて実施された．departmental bulletin pape

親から子への環境配慮の規範・行動の伝播の縦断的研究

The aim of our study is to confirm that children's environmental personal norms were formed by injunctive norms of close others. We conducted a longitudinal survey with one-year interval for 5th and 6th grade elementary school children and their parents/caregivers. The results of the study revealed that children's personal norms were formed by injunctive norms of their parents, and that parents' environmental - conscious behaviors affected children's descriptive norms at the same time point. Parents' attention/praise affected children's injunctive norms at the next year. The study also showed that the influence from their parents were larger than that of their peers.departmental bulletin pape

市民参加による熟議経験の効果と今後の参加意図の規定因としてのエンパワーメント : プランニングセルの参加経験者と未経験者の比較

This study explored whether citizen participation empowers people, and examined the effect of empowerment expectation on intention to participate in future citizen participation programs. We also focused on three subscales of competence: deepening participants' understanding of discussion themes, enabling mutual understanding among participants, and performance appraisal of citizen's panel conference; and examined their relationships with measures of empowerment. We explored the "Citizen's Report for Health" program, conducted from 2003 to 2004 in eight regions of Bavaria, Germany. They used the "Planning Cells" citizen participation and deliberation model, involving randomly selected citizens. Fifty residents from each region (n=405) attended a four-day meeting and discussed the suggestions for future health policies. A questionnaire survey was administered to 405 participants and 3500 non-participants (500 residents randomly selected from each of the seven regions) in early 2007. The main results were as follows: 1) participants revealed higher scores than non-participants regarding participation intention in a future opportunity, each subscale of competence, and, each subscale of empowerment, 2) both participants and non-participants determined the intention to participate in future participation programs by the empowerment expected to be gained. 3) Competence was the main determinant of each empowerment. We discussed the necessity to encourage people with no experience of citizen participation to foster greater expectations of empowerment to promote their participation.本研究は文部科学省科学研究費補助金基盤研究 (B) 海外（課題番号：17402035，研究代表者：広瀬幸雄）の補助を受けて実施された．departmental bulletin pape

Observation of the Decay B0→D±D*∓

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オージエ電子分光分析による合金膜のシリサイド形成初期過程の検討

application/pdfThe process of silicide formation by alloy films contacted with Si has been examined on the basis of results obtained from possible combinations of binary alloy films， such as two near-noble metals, near-noble metal and refractory metal，and two refractory metals. It is found that the phase separation of the alloy films due to the silicide formation is observed in the initial stage of the reaction when the following conditions are satisfied ； (i)the alloy film consists of the combination of near-noble metal and refractory metal，which have different reaction process with Si，in the sense that the diffusion species for the reaction of the slicide formation is metal or silicon，and(ii)the alloy doesn't form a stable intermetallic compounddepartmental bulletin pape