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Life Safety. Practical RIU - BZH93
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Objective 1.
Define the following indicators of injury: CZK Ktyazh, Knetr, Kc if the number of injured in the production for the year is 10 people., Of which temporary disability - 8 people., 1 person. became disabled and one died. The total number of working days during which sick for all the victims with temporary disability - 160 days. The average number of employees in the company of 500 people.
Objective 2.
The shop is located 4 noise source, creating a workplace intensity of 60 dB each. What is the noise level in the shop, if all three sources of running? (External noise neglected).
Task 3.
Included are two identical noise source. The noise level in the room is 0 dB. What will be equal to the noise level, if you turn off one of the sources, and what will be the intensity of the noise (external noise neglect)?
Task 4.
Define by utilization of light flux required number of fixtures if necessary to ensure E = 150 lx. Background: the room of 200 m2 has two longitudinal rows of lamps such as LSP 13-2x40 (type CMP - A) with lamps LB40; take in = 0,8; Ks = 1,5, z = l, 15; p = 0.5; pc = 0.5; RR = 0.3. The missing data are defined in the tables 1.2.
Task 5.
Define by utilization of light flux required number of fixtures type LVP06 (KCC type D-1) with lamps LB65. Take the area of \u200b\u200bthe room
S = 150 m2 in = 0,8; Ks = 1,5, z = l, 15; p = 0.7; pc = 0.3; RR = 0.1, E = 200 lx. (To determine the missing data, use Table 1.2. See reference 2).
Task 6.
Online IT (impeding Ul = 380) is short-circuited two different phases into two separate earthed housing. Earthing first body has a hemispherical shape with a radius r = 0.2 m and is located on the ground surface. A man stands with one foot on this earth electrode. The distance to the second grounding more than 30 m. Determine the voltage step Ush and current Ih, flowing through a person if
Additional information
net short step ..... person .......
Target 7.
It is required to determine the concentration of the mixture and the pressure and conclude the characteristics of destruction for the next emergency. At the closed area chemical plant leak of acetylene tank. In contact with hot spring there was an explosion resulting gas mixture.
Initial data:
1) The mass leaked from the tank acetylene m = 1,000 kg;
2) the size of the site: the height of 10 m, width 50 m, length 100 m;
3) Vsv - conditionally equal to 80% of the geometrical volume of the room m³;
4) the initial pressure P0 = room 101 kPa;
5) the density of air to blast ps = 1,293 kg / m³;
6) heat capacity of air Cp = 1.0110³ J / (kgK);
7) the initial temperature T0 = 290K;
8) participation rate of fuel gas in the blast z = 0,3;
9) The lower and upper limits LEL concentration = 16.5 g / m³, VKPV = 885.6 g / m³;
10) The heat of combustion of acetylene Qt = 49105 (J / kg).
Target 8.
As a result of the accident at the nuclear power plant with the destruction of the VVER-440 was REM. On the industrial site radiation levels measured 10 hours after the accident was 7 Gy / h. Determine the location of the object on the REM. The necessary data taken from the tables 8.1, 8.2 manual.
Target 9.
Given: The accident at the plant without destroying the VVER-440 reactor was REM. On the industrial site radiation levels measured at 0.5 hours after the accident amounted to 2 Gy / h. Determine the location of the object on the REM. The necessary data taken from the tables 8.1, 8.2 manual.
Target 10.
Predict the fracture zone when the shock wave of the explosion of a possible ground capacitance, which is ethyl alcohol, and to assess the degree of damage to unprotected people, as well as the nature of possible damage to the production of industrial objects within the blast zone.
Initial data:
1) the mass of ethyl alcohol m = 1.3 m.
2) the distance from the center of the explosion to the object - 600 m.
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