Showing 2 results for Nasel saraji
J Adl, A Ghahramani , J Nasel Saraji ,
Volume 3, Issue 4 (4 2005)
Abstract
stundy (HAZOP) and the component’s failures of major equipments were assessed by
Failure mode and Effect Analysis (FMEA).
Totally 68 hazards were identified and their risks were calculated. The highest risk
(60) was belonged to the reduction of gas temperature before entering to the refinery
and failure of DEA cooling system at the final node (DE). The failures of P-6 pump,
F.C.V.4 valve, L.C.V.2 and F.C.V.12 (all in the same node) and reduction of gas
temperature in nodes AB, BC and CD had the lowest calculated risk (12). Comparing
with the acceptable level of risk in the refinery which was 200, all of the identified
hazards risk were very low therefore did not need any appropriate measure of risk
reduction to be proposed.
For overcoming the fact that both HAZOP and FMEA techniques, instead of being
performed by a team was accomplished by both of us, we used the consultations given
us by the experienced exploitation engineers of under study unit. This consultation
was also very useful in fulfilling deficiencies of existing record keeping system.
Performing the protective maintenance and preparing a precise timing program for
P.M was given as a main proposal for risk reduction by decreasing the probability of
occurrence.
J Nasel Saraji , S.a Mosavi , S.j Shahtaheri , M Pourmahabadian ,
Volume 3, Issue 4 (4 2005)
Abstract
The exposure index was used to obtain integrated and concise assessment of the various risk factor analyzed and to classify occupational scenarios featuring significant and diversified exposure to risk factors.
In this study, an integrated procedure from four data gathering methods include observational methods (for jobs and tasks analyzing featuring repetitive movements) interview method (for asking about upper limbs musculoskeletal disorders), Nordic musculoskeletal questionnaire (NMQ) method and Occupational repetitive actions method (OCRA) were used .
A 385 persons group was studied, working in 33 various jobs in a textile factory. The results showed that, 0.86% of work tasks had low risk level, 87.93% of work task were located in moderate risk level and 11.21% of work task had a high risk level. Mean of exposure indices in four jobs include primary of spinning, spinning, primary of weaving, and weaving had significant difference (p=0.003). Also, the weaving job had a highest risk of occurrence upper extremity musculoskeletal disorders. Mean of right and left hand exposure indices showed a significant different (p<0.001). There was significant relationship between UEMSDs with age (p<0.05).
It was concluded that, the OCRA methods can be a useful method for evaluation of UEMSDs in repetitive activities.
