Science and Technology of Nuclear Installations / 2012 / Article / Tab 9

Review Article

The Fukushima Event: The Outline and the Technological Background

Table 9

Summary of background for the Fukushima Daiichi accident.

No.Topic*EHPNotes

1External PIE featuresYESFeedback from monitoring of natural events.
2DSA: SBO and LOOP analysesNotes at rows 6 and 7 apply.
3LOOP mitigation effortYESPromptly bringing additional DG to the site**.
4SFP loss of coolingYESLight pumping device sufficient**.
5PSA: PIE and DG reliabilityYESFailure in estimating DG reliability under tsunami (and aging).
6PSA: core and containment failureCore melt “expected”.
7PSA: SFP failureSFP fuel failure “expected”.
8The licensingYESAging and integrated individual NPP to be better considered.

*Topics (1) to (8) are listed in a synthetic way. **Operators or managers from the Fukushima Utility.

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