Tugas Keselamatan Pabrik_kelompok1_ayu_dini_irfan_aidil_tomas.docx

Kelompok 1: Ayu Sinnatawwannah Dini Ferbriana Irfan Dwi Saputra Tomas Surbakti Rachmad Aidil Azhar

TUGAS KESELAMATAN PABRIK 1.1 An employee works in a plant with a FAR of 4. If this employee works a 4-hr shift, 200 days per year , what is the expected deaths per person per year? Answer : FAR Deaths per person per year

4 hour

=(

shift

200 shifts

)(

year

4 deaths

) (108 hours)

= 3,2 x 10-5 deaths/ person-year 1.2 Three process units are in plant. The units have FARs of 0.5 , 0.3, and 1.0, respectively. a. What the overall FAR for the plant, assuming worker exposure to all three units simultaneously? b. Assume now that the unit are FAR enough apart that an accident in one would not affect the workes in another. If a worker spends 20% of his time in process area 1,40% in process area 2, and 40% in process area 3, what is his overall FAR? Answer : a. Overall FARs = ∑FARs = 0,5 + 0,3 +1,0 =1,8 b. Area 1: 20% → FAR = 0,5 Area 2: 40% → FAR= 0,3

Area 3: 40% → FAR= 1,0 Overall FAR = (20%)(0,5) + (40%)(0,3) + (40%)(1,0) = (0,2)(0,5) + (0,4)(0,3) + (0,4)(0,1) = 0,1+ 0,12 +0,4 = 0,62

1.3 Assuming that a car travels at an average speed of 50 miles per hour, how many miles must be driven before fatality is expected? Answer : 57 deaths

Pada table 1-4 FAR car = At au 1 death per

108 57

108 exposed hours

= 1,75 × 106 ℎ𝑜𝑢𝑟𝑠 50 𝑚𝑖𝑙𝑒𝑠

(1,75 × 106 ℎ𝑜𝑢𝑟𝑠) (

ℎ𝑜𝑢𝑟

) = 87,5 𝑚𝑖𝑙𝑖𝑜𝑛 𝑚𝑖𝑙𝑒𝑠

1.5 A plant employes 1500 full-time workes in a process with a FAR of 5. How many industrial related deaths are expected each year? Answer : 2000 hours

Total working hours per year = (1500 workers) (

workes

)

= 3 × 106 hours Deaths per year

5 deaths

= (3 × 106 hours) (108 ℎ𝑜𝑢𝑟𝑠) = (3 × 106 )(5 × 10−8 ) deaths = 15× 10−2 𝑑𝑒𝑎𝑡ℎ𝑠 = 0,15 deaths

1.9 A university has 1200 full-time employess. In a particular year this university hasd 38 reportable lost-time injuries with a resulting 274 lost workdays. Compute the OSHA incidence rate based on injuries and lost workdays. Answer : -

2000 ℎ𝑜𝑢𝑟𝑠

Total hours worked = (1,200 𝑒𝑚𝑝𝑙𝑜𝑦𝑒𝑠𝑠) ( 𝑒𝑚𝑝𝑙𝑜𝑦𝑒𝑠𝑠 ) = 24 × 105 ℎ𝑜𝑢𝑟𝑠

-

OSHA injury rate =

38 𝑖𝑛𝑗𝑢𝑟𝑖𝑒𝑠 24×105 ℎ𝑜𝑢𝑟𝑠

× 200.000 ℎ𝑜𝑢𝑟𝑠

= 3,17 injuries

-

OSHA lost workdays =

274 𝑙𝑜𝑠𝑡 𝑤𝑜𝑟𝑘𝑑𝑎𝑦𝑠 24×105 ℎ𝑜𝑢𝑟𝑠

× 200.000 ℎ𝑜𝑢𝑟𝑠

= 22,8 lost workdays