Current Issues on Pra Regarding Seismic and Tsunami Events at Multi Units and Sites Based on Lessons Learned From Tohoku Earthquake/Tsunami

Ebisawa, Katsumi; Fujita, Masatoshi; Iwabuchi, Yoko; Sugino, Hideharu

doi:10.5516/net.03.2012.704

Cited by 22 publications

(14 citation statements)

References 2 publications

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“…2. The Emergency Diesel Generators and switchboards installed in the basement floor of the reactor and the turbine buildings were flooded except for Unit 6, and the emergency power source supply was lost (Japanese Government, 2011;Ebisawa et al, 2012c;Kameda, 2012).…”

Section: Overview Of Fukushima Npp Accident and Lessons Learned Frommentioning

confidence: 99%

“…Failure of reactor core cooling resulted in core damage in about 5 or 6 h. Temperature and pressure in the primary containment vessel rose up, and radioactive materials were released through seals into the power plant and then the surrounding area. Consequently, a wide area was contaminated by the radioactive materials (Japanese Government, 2011;Ebisawa et al, 2012c;Kameda, 2012).…”

Section: Overview Of Fukushima Npp Accident and Lessons Learned Frommentioning

confidence: 99%

“…The tsunami height was so high that the experts estimated it to be more than 10 m from a photograph showing the overflow status of tsunami seawall (10 m) in Fig. 1 (Japanese Government, 2011;Ebisawa et al, 2012c;Kameda, 2012). As to the sea water pump facilities for component cooling, all units were flooded by the tsunami as shown in Fig.…”

Section: Overview Of Fukushima Npp Accident and Lessons Learned Frommentioning

confidence: 99%

“…Based on the above method, one of authors developed the procedure for evaluating the failure correlation coefficient and response correlation coefficient between the multi components under the strong seismic motion (Ebisawa et al, 2012c). These procedure and failure correlation coefficients were applied to two different BWR units and their CDF was evaluated.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, authors proposed the concept and method for evaluating CDF considering failure correlation at the multi units and sites (Ebisawa et al, 2012c). Based on the above method, one of authors developed the procedure for evaluating the failure correlation coefficient and response correlation coefficient between the multi components under the strong seismic motion (Ebisawa et al, 2012c).…”

Section: Introductionmentioning

confidence: 99%

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Concept and methodology for evaluating core damage frequency considering failure correlation at multi units and sites and its application

Ebisawa¹,

Teragaki²,

Nomura³

et al. 2015

Nuclear Engineering and Design

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h i g h l i g h t s• We develop a method to evaluate CDF considering failure correlation at multi units.• We develop a procedure to evaluate correlation coefficient between multi components. • We evaluate CDF at two different BWR units using correlation coefficients.• We confirm the validity of method and correlation coefficient through the evaluation. a b s t r a c tThe Tohoku earthquake (Mw9.0) occurred on March 11, 2011 and caused a large tsunami. The Fukushima Daiichi Nuclear Power Plant with six units were overwhelmed by the tsunami and core damage occurred. Authors proposed the concept and method for evaluating core damage frequency (CDF) considering failure correlation at the multi units and sites. Based on the above method, one of authors developed the procedure for evaluating the failure correlation coefficient and response correlation coefficient between the multi components under the strong seismic motion. These method and failure correlation coefficients were applied to two different BWR units and their CDF was evaluated by seismic probabilistic risk assessment technology. Through this quantitative evaluation, the validity of the method and failure correlation coefficient was confirmed.

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Section: Overview Of Fukushima Npp Accident and Lessons Learned Frommentioning

confidence: 99%

Section: Overview Of Fukushima Npp Accident and Lessons Learned Frommentioning

confidence: 99%

Section: Overview Of Fukushima Npp Accident and Lessons Learned Frommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations