論文
ナトリウム中に噴出する不活性ガス不足膨張衝突噴流の 局所構造と対応するエロージョン試験法の開発
著者:
工藤 秀行,Hideyuki KUDOH,太田 淳己,Junki OHTA,杉山 憲一郎,Ken-ichiro SUGIYAMA,奈良林 直,Tadashi NARABAYASHI,大島 宏之,Hiroyuki OHSHIMA,栗原 成計,Akikazu KURIHARA
発刊日:
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キーワードタグ:
When a heat transfer tube wall in a steam generator of a sodium-cooled fast reactor fails, high-pressure steam leaks into low-pressure liquid sodium side. Then the high-temperature and highly corrosive reaction jet causes secondary failures of neighboring heat transfer tubes. The objective of the present study is to develop an experimental method to obtain data that is necessary to validate and improve a safety evaluation code on the sodium?water reaction. In the present paper, the methods of sodium?...
英字タイトル:
Development of Erosion Test Methods on Underexpanded Inert-Gas Impinging Jets Injected in Liquid Sodium
論文
ポンプ静止翼の脈動励振のメカニズムと対策
著者:
宮野 廣,Hiroshi MIYANO,奈良林 直,Tadashi NARABAYASHI,萩原 剛,Takeshi HAGIWARA
発刊日:
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Many studies about the vibration of rotating vane of turbine had been performed. As in this paper, it was observed on a centrifugal pump operation that stationary part, ring-hat disk vane was vibrating, then it was studied that a mechanism of the phenomena was presumed from the vibration mechanism of turbine vanes.he experimental studies by using actual pump and analytical studies were performed. It was made clear that the interference between pump vanes and pump volute water cuts generate turbulence...
英字タイトル:
Cause and Countermeasure of Stationary Disk Vibration Damage in Centrifugal Pump
論文
塑性率を考慮した静的震度設計の高度化による 原子力発電所設備の耐震設計の多様化について
著者:
長澤 和幸,Kazuyuki NAGASAWA,飯島 唯司,Tadashi IIJIMA,奈良林 直,Tadashi NARABAYASHI
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In Japanese regulatory guide for seismic design of nuclear power plants, the combination of the design by the dynamic response analysis with design basis earthquake and the design by the design basis seismic static coefficient (DSC) is required. This paper proposes new static seismic design methodology with newly defined DSC derived from elastic-plastic time historical seismic response analysis of components and allowable ductility factor to prevent damage to components. The process of the seismic re...
英字タイトル:
Diversification of Seismic Design of Components of Nuclear Power Plants with Improvement of Static Seismic Coefficient considering Ductility Factor
論文
福島第一原子力発電所第1号機~第3号機の 地震から津波来襲までの時系列評価(その 1)
著者:
小林 正英,Masahide KOBAYASHI,奈良林 直,Tadashi NARABAYASHI
発刊日:
公開日:
キーワードタグ:
The Fukushima Daiichi nuclear power plant's units 1/2/3 which were under operation when the Tohoku - Pacific Ocean Earthquake occurred at 14:46 March 11, 2011, were analyzed by time series evaluation from the earthquake occurrence to the tsunami invasion as to whether safety functions were effective. The shutdown function and containment function were analyzed in this paper, and it showed both the safety functions were kept effective during the earthquake occurrence to the tsunami invasion....
英字タイトル:
Time-series evaluation on Fukushima Daiichi NPP units 1/2/3 from Tohoku - Pacific Ocean Earthquake to the related tsunami invasion (1)
論文
福島第一原子力発電所第1号機~第3号機の 地震から津波来襲までの時系列評価(その2)
著者:
小林 正英,Masahide KOBAYASHI,奈良林 直,Tadashi NARABAYASHI
発刊日:
公開日:
キーワードタグ:
The Fukushima Daiichi Nuclear Power Plant units 1, 2, and 3 were evaluated to determine whether their safety functions were effective. These units, which were under operation when the Tohoku - Pacific Ocean Earthquake occurred at 14:46 JST on March 11, 2011, were analyzed via a time series evaluation from the time the earthquake occurred to the subsequent tsunami attack. The cooling function of each unit was analyzed and the results show that the cooling functions were effective during the evaluation...
英字タイトル:
Time series evaluation on Fukushima Daiichi NPP units 1/2/3 from Tohoku - Pacific Ocean Earthquake to the tsunami invasion(2)