Environmental Engineering Reference
In-Depth Information
Table 10. Test values of mechanical EIF
Type and Measurements Unit
Test Values of EIF for Degrees of Test Hardness
(see Table 9)
1
2
3
4
Sinusoidal vibration
displacement amplitude
(in frequency rate 1 - 9 Hz), not less
0,75 mm
1,5 mm
3,5 mm
7,5 mm
acceleration amplitude
(in frequency rate 9-150 Hz), not less
2,0 m / sec 2
5,0 m / sec 2
10 m / sec 2
20 m / sec 2
duration, not less
60 min
60 min
60 min
60 min *
influence direction
Z
Z
Z
X, Y, Z
Mechanical shocks
peak shock acceleration, not less
40 m / sec 2
70 m / sec 2
70 m / seс 2
shock impulse duration
100 mseс
50 mseс
50 mseс
shock impulse shape
sinusoid half-wave
period between shocks, not less
2,0 seс
2,0 seс
2,0 seс
number of shocks, not less
1000
1000
1000*
influence direction
Z
Z
Х, Y, Z
* In each direction Note. In the table the following conventional symbols are used: X - direction along the horizontal plane; Y - direction
along the horizontal plane, perpendicular X; Z - direction along the vertical plane
• Seismicity of NPP site (intensity level of
МCE and DBE in points).
• Soil conditions in the site of unit on the
basis of seismic microzoning information.
• Accelerograms of MCE and DBE, syn-
thesized by statistic processing and anal-
ysis of a range of accelerograms of real
earthquakes.
• Rate of own vibrations and damping pa-
rameters (damping factor or algorithmic
decrement) of a building construction.
• Height of location and a mounting tech-
nique of device on a building supporting
construction (ceiling, wall, column), in-
termediate construction (in a room, case,
panel, board) or technological equipment
(piping, pipeline valve, etc.)
Required response spectrum is characterized
by two horizontal and a vertical components act-
ing simultaneously. Acceleration amplitudes in a
vertical direction are accepted with a level 0,7
from the specified in Table 11.
Earthquake resistance of peripheral equip-
ment and SHC is determined on the basis of test
results, during which each of their operating stand-
alone component parts are put under influence
of sinusoidal vibration, simulating seismic EIF.
Degree of test hardness is determined according to
Table 12, depending on the specified intensity
level of МCE and DBE, mounting technique and
height, at which a device will be installed.
During tests a provided technique of device
mounting is simulated, using parts, materials and
technology specified in documentation.
Test influence is chosen according to Table 13
and controlled in the place of device mounting.
Test influence is simultaneously applied along
three mutually orthogonal (two horizontal and
vertical) directions. In case of lack of a required
In case of lack of results of calculation of mod-
eling required response spectrum is determined
on the basis of generalized values of seismic EIF
(Table 11).
 
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