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Calculate the probability of failure for the top event

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Reference no: EM132170298

Reliability and Availability Assessment

This assessment is about: Learning from Failures and Evaluating Risk.

Paper: 24 Hours at Fukushima: A blow-by-blow account of the worstnuclear accident since Chernobyl by Eliza Strickland. This paper examines the failures whichled to one of the world's worst disaster.

This was a disaster which could have been avoided.In any process industry, especially safety critical systems such as nuclear energy, it isessential that safety is paramount and is built into the design. In such cases, any failure can beattributed to one of two main reasons: either a design integrity failure or an operational andmaintenance failure. Fukushima was clearly caused by the former rather than the latter.

The paper has highlighted a number of shortcomings of initial design and lacked a sufficientfactor of safety. This sums it all up - personal at the plant were aware that disaster couldhappen but no steps were taken to prevent.In addition to the attached paper, you could search for videos: "Seconds From Disaster FukushimaDocumentary" and "Understanding the accident of Fukushima Daiichi NPS - Source IRSN"from the internetto complement the paper and help your understanding on the assignment section.

Your task in this assignment is to look back at the issues and show what could have been done to prevent the disaster. In order to do this:Fully understand the causes and the issues relating to the Fukushima disaster.

Write a detailed report covering the following:

- The technical causes of failure from a design perspective.
- Consequences of failure.
- Carry out an exercise to analyse the cause of the Failure, using Fault Tree Analysis
(FTA), and Reliability Block Diagram (RBD).
- For your FTA, estimate the realistic probabilities of the various events you have highlighted.
- Use Boolean algebra to find the minimal Cut Set and draw the equivalent tree.
- Calculate the probability of failure for the top event.

In the report, you should also make recommendations on what should have been done in terms of emergency and contingency planning.

Article - 24 Hours at Fukushima - A blow-by-blow account of the worst nuclear accident since Chernobyl By Eliza Strickland

Article - WHY FUKUSHIMA WAS PREVENTABLE by James M. Acton and Mark Hibbs

Verified Expert

This task covers a risks analysis for Fukushima Disaster. The work covers different sections within the risk analysis including technical causes of failure from a design perspective, Consequences of failure, analysis of the cause of the Failure, using Fault Tree Analysis (FTA), and Reliability Block Diagram (RBD), estimation of the realistic probabilities of the various events, and cut set.All the requirements were captured in a 1500 word document. The work was properly cited in APA and references listed.

Reference no: EM132170298

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len2170298

11/19/2018 12:57:32 AM

The Report is to be around 1500 words (excluding refrenced). Coursework 2 submission P/T xx December 2018 Dr Babakalli Alkali This assessment is worth 25% of the marks of the Total Coursework marks. Marking is as follows: Topic Marks Discussion of technical causes of failure. 20% FTA, RBD, Cut Sets and probability of failure calculation. 50% Discussion on consequences of failure. 10% Conclusions. 10% References (Harvard or numbering style) 10% Total 100%

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