Krasnodar GRES Project Volume I11 Environmental Assessment

Noise range in the engine room falls within a wide frequency range of 100 to
8000 Hz. During the normal mode of operation of equipment, noise is steady and
of wide band.
Maximum permissible noise levels at the work stations were defined by Sanitary
Code 3223-85, and those within the compound by SC 3077-84 and
corresponding GOST 12.1.003-89 and GOST 12.1.036-81.
These standards limit the constant noise level at work stations to 80 dB.
Maximum acoustic level Le max of non-constant noise (except pulse noise) at the
work stations should not exceed 110 ~ BA. Maximum acoustic level of pulse noise
is 125 ~ B (GOST A 12.1.003-89).
Maximum level of non-constant noise within the compound should not exceed 60
~BA; within the territory of hospitals 50 ~ B (SC A 3223-85).
Figure 5.3 is indicative of marking and location of noise sources.
~0 (NS) - 1 (6 pcs)
A group of air intake chambers. Noise is generated by CT compressor and by
release of excessive air through fire safety valves into suction channel. Acoustic
intensity of one chamber is Ld = 145 ~ B (see A Diagram 1 and Table 3). All noise
sources may work simultaneously. Total acoustic intensity of the group is - Ld
= I 54 ~BA.
~0 (NS) - 2 (1 PCS)
Ferro-concrete stack i= 150 m Ld = 110 ~ B with A one unit operational. Acoustic
intensity level generated by stack mouth shall be equal to the sum of intensity
values of the units operated simultaneously disregarding acoustic intensity
decrease in heat recovery steam generators Ld = 1 19 ~BA.
~0 (NS) - 3 (3 pcs) Cooling towers. Acoustic intensity levels of the cooling towers
Ld =115 ~BA.
ED (NS)- 4 Steam pipeline of emergency steam release Ld = 130 ~ B A
simultaneous release - 1 noise source.
~0 INS) - 5 (1 pcs) Gas pipeline on the rack. Ld = 11 5 ~ BA.
The plant layout plan indicatives the location of the above reference points.
Reference point 001 is located on the industrial site 50 m from the group of air
intake chambers.
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