Chernobyl Risk Assessment Essay

1607 words - 7 pages

Background and literature Review

The Chernobyl accident was a disastrous nuclear event that happened on 26th April 1986 at the Chernobyl Nuclear Power Plant in Ukraine. The Chernobyl disaster is classified as a level 7 event according to the International Nuclear Event Scale (only two events have been classified this high in the past) and has caused damages that consist of the cost of 500,000 workers and 18 billion rubles, 31 deaths according to the Soviet casualty count (this is still being disputed) and between 4000-27000 affected future deaths due to radiation exposure [G1].

Casual Chain

The main reason that could be attributed to the cause of the Chernobyl accident was due to ...view middle of the document...

Public and All people in the area.
Government and stakeholders of the reactor.
Entire Industry and business centre within area.
Massive financial loss and reimbursement.
Massive injury, death and radiation exposure.
Area completely abandoned and evacuated.
Initiating Event
Exposure
Outcomes
Consequences

Risk Assessment

4.4 Method of Analysis
Low (RPN = 1 to 100)Acceptable | Moderate (RPN = 100 to 500)Tolerable with Monitoring | High (RPN = 501 to 750)Not Tolerable | Extreme (RPN = 750 to 1000)Not Tolerable |

Table 1.4 – Failure Mode and Effect Analysis (FMEA) |
RiskID | Risk Description and Impact | Initial Risk Rating | Risk Treatment Plan | Residual risk rating(After Risk treatment) |
| | Probability | Severity | Detectability | Risk Priority Number (RPN) (RPN) | | Probability | Severity | Detectability | Risk Priority Number |
1 | Reactor explosion and radiation release from poor management or faulty system. | 8 | 10 | 8 | 640 | Safety and proper training. Improve and update system and create backups. | 1 | 10 | 3 | 30 |
2 | Production and operation risk | 7 | 5 | 5 | 175 | Implement new software for management and organization | 3 | 5 | 2 | 30 |

Table 1.4 – Failure Mode and Effect Analysis (FMEA) |
RiskID | Risk Description and Impact | Initial Risk Rating | Risk Treatment Plan | Residual risk rating(After Risk treatment) |
| | Probability | Severity | Detectability | Risk Priority Number (RPN) (RPN) | | Probability | Severity | Detectability | Risk Priority Number |
3 | Commercial and financial risk | 5 | 5 | 5 | 125 | Proper advertisement to the necessary people. Educate skeptics on Nuclear power. | 3 | 5 | 3 | 45 |
4 | Strategic risks: Eg. Purpose of nuclear reactor supplying energy is no longer needed in the near future. | 3 | 8 | 5 | 120 | Have a backup plan for the use of the nuclear reactor as well as more thoroughly research the changing human technology and needs. | 2 | 8 | 4 | 64 |

HSE RISK Tolerability Test
Risk Tolerability
Risk Categories Typical quantifiable values

Nuclear explosion and radiation release.
Nuclear explosion and radiation release.
Nuclear Waste
Nuclear Waste
Operational management failure, strategic management failure, operation and production and financial failure.
Operational management failure, strategic management failure, operation and production and financial failure.

Intolerable risk cannot be justified unless in extraordinary circumstances
Intolerable risk cannot be justified unless in extraordinary circumstances

Undesirable, tolerable only if reduction is impractical or if cost is too grossly disproportionate to improvement gained
Undesirable, tolerable only if reduction is impractical or if cost is too grossly disproportionate to improvement...

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