Before you start please read the following instructions carefully.
1. This assignment forms part of the formal assessment for this module. If you fail to reach the required standard for the assignment then you will be allowed to resubmit but a resubmission will only be eligible for a Pass grade, not a Merit or Distinction.
You should therefore not submit the assignment until you are reasonably sure that you have completed it successfully. Seek your tutor’s advice if unsure.
2. Ensure that you indicate the number of the question you are answering.
3. Make a copy of your answers before submitting the assignment.
4. Complete all details on the front page of this TMA and return it with the completed assignment including supporting calculations where appropriate. The preferred submission is via your TUOL(E) Blackboard account: https://eat.tees.ac.uk
5. Your tutor’s comments on the assignment will be posted on Blackboard.
1
Teesside University Open Learning (Engineering)
© Teesside University 2011
1. Discuss briefly the assertion that ‘investment by a company in safety procedures and training reduces the risk and probability of accidents and is good for business’.
2. In systematic Risk Assessment when analysing a hazardous incident it is useful to answer four basic questions regarding the incident.
(a) State these four relevant questions.
(b) State briefly the what is meant by a ‘quantitative approach’ to safety assessment.
3. (a) Define the terms ‘hazard’ and ‘risk’ and distinguish between the two.
(b) Describe briefly what is meant by ordinary (industrial), residual, process and societal risks, giving examples of each.
4. Classify the following situations in terms of type of risk and complete the risk table by assigning probabilities between 0 (not possible) and 1 (certain) with 0.1 – 0.3 (low), 0.4 – 0.6 (average), 0.7 – 0.9 (high) for injury and equipment damage for each hazard. State concisely the reasons for your choices and any qualifications you feel are required. Factors such as weather, location and population density should be considered and stated.
(i) Object falling from scaffold.
(ii) Tripping over a low level pipe in a petrochemical plant whilst on nightshift.
(iii) Electric shock from overhead cable/line struck by lightning.
2
Teesside University Open Learning (Engineering)
© Teesside University 2011
(iv) Radioactive leak into a river from nuclear power station.
(v) Electricity supply interruption in an equipment store with emergency lighting.
(vi) Not replacing a walkway grating on an oil rig.
(vii)Hydrogen sulphide release from pocket in the end of a blanked off pipe in a crude oil fractionation plant.
Situation
Orindary Residual Process Societal Probability Probability Risk Risk Risk Risk of Injury of Damage
(i)
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
3
Teesside University Open Learning (Engineering)
© Teesside University 2011
5. The sketch shows a tank which contained a highly flammable volatile liquid at a slightly higher than ambient temperature.
Solid residues had formed on the stirrer shaft and required removal. The vessel was pumped out and charged with nitrogen to minimise the risk of air entering to form a flammable atmosphere of hazardous vapour and air.
The manhole cover was then removed and the residues began to be cleaned off with a scraper rod. The operator, however, went for his lunch before completing the job but left the manhole cover off. Upon his return, a flash fire was caused when he generated a spark by striking the stirrer shaft with the rod.
Write a short report suggesting reasons why this accident occurred.
Flammable vapour and nitrogen
Stirrer Scraper rod
4
Teesside University Open Learning (Engineering)
© Teesside University 2011
Teesside University Open Learning (Engineering)
© Teesside University 2011
Question Before you start please read the following instructions carefully.
1. This assignment forms part of the formal assessment for this module. If you fail to reach the required standard for the assignment then you will be allowed to resubmit but a resubmission will only be eligible for a Pass grade, not a Merit or Distinction.
You should therefore not submit the assignment until you are reasonably sure that you have completed it successfully. Seek your tutor’s advice if unsure.
2. Ensure that you indicate the number of the question you are answering.
3. Make a copy of your answers before submitting the assignment.
4. Complete all details on the front page of this TMA and return it with the completed assignment including supporting calculations where appropriate. The preferred submission is via your TUOL(E) Blackboard account: https://eat.tees.ac.uk
5. Your tutor’s comments on the assignment will be posted on Blackboard.
1
Teesside University Open Learning (Engineering)
© Teesside University 2011
1. Discuss briefly the assertion that ‘investment by a company in safety procedures and training reduces the risk and probability of accidents and is good for business’.
2. In systematic Risk Assessment when analysing a hazardous incident it is useful to answer four basic questions regarding the incident.
(a) State these four relevant questions.
(b) State briefly the what is meant by a ‘quantitative approach’ to safety assessment.
3. (a) Define the terms ‘hazard’ and ‘risk’ and distinguish between the two.
(b) Describe briefly what is meant by ordinary (industrial), residual, process and societal risks, giving examples of each.
4. Classify the following situations in terms of type of risk and complete the risk table by assigning probabilities between 0 (not possible) and 1 (certain) with 0.1 – 0.3 (low), 0.4 – 0.6 (average), 0.7 – 0.9 (high) for injury and equipment damage for each hazard. State concisely the reasons for your choices and any qualifications you feel are required. Factors such as weather, location and population density should be considered and stated.
(i) Object falling from scaffold.
(ii) Tripping over a low level pipe in a petrochemical plant whilst on nightshift.
(iii) Electric shock from overhead cable/line struck by lightning.
2
Teesside University Open Learning (Engineering)
© Teesside University 2011
(iv) Radioactive leak into a river from nuclear power station.
(v) Electricity supply interruption in an equipment store with emergency lighting.
(vi) Not replacing a walkway grating on an oil rig.
(vii)Hydrogen sulphide release from pocket in the end of a blanked off pipe in a crude oil fractionation plant.
Situation
Orindary Residual Process Societal Probability Probability Risk Risk Risk Risk of Injury of Damage
(i)
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
3
Teesside University Open Learning (Engineering)
© Teesside University 2011
5. The sketch shows a tank which contained a highly flammable volatile liquid at a slightly higher than ambient temperature.
Solid residues had formed on the stirrer shaft and required removal. The vessel was pumped out and charged with nitrogen to minimise the risk of air entering to form a flammable atmosphere of hazardous vapour and air.
The manhole cover was then removed and the residues began to be cleaned off with a scraper rod. The operator, however, went for his lunch before completing the job but left the manhole cover off. Upon his return, a flash fire was caused when he generated a spark by striking the stirrer shaft with the rod.
Write a short report suggesting reasons why this accident occurred.
Flammable vapour and nitrogen
Stirrer Scraper rod
4
Teesside University Open Learning (Engineering)
© Teesside University 2011
Teesside University Open Learning (Engineering)
© Teesside University 2011
Question