Krasnodar GRES Project Volume I11 Environmental Assessment

use of individual noise reduction means when working close to equipment
generating excessive noise or when noise covers are removed from the
equipment (GOST 12.1.029-80).
NOISE MITIGATION MEASURES ON POWER PLANT SITE AND ADJACENT
TERRITORIES:
Reasonable facade orientation of major noise generating facilities and
directional noise sources.
Use of effective heat and noise insulation for gas and air ducts, made of
noise absorbing material (ZPM 80 mm basalt or fiber glass) and 20 to 25
mm thick asbestos layer reinforced by metal grid. Effect of this layer is 25
to 30 ~ BA.
Improvement of noise insulating capacity of fencing structures for noise
generating facilities (main building, GRP, etc.) by sealing door and gates
shutting, proper packing of fitting voids and passes for means of
communication.
lnstallation of heat and noise insulation of steam pipelines and gas pipelines.
lnstallation of plastic noise reduction devices in air intake chambers for all
combined cycle units (PGUs).
lnstallation of mufflers in gas exhaust ducts in accordance with the GOST
recommendations. After commissioning of heat recovery boilers it is
necessary to measure acoustic intensity levels at heat recovery boiler
outputs and, if required, to mount ring packing on the lower part of the
stack. Acoustic effect of 20 to 30 dB at all frequency bands can be reached
with packing height of 7 m.
lnstallation of noise reduction devices for steam safety valves and direct
steam exhaust pipeline. The noise reduction devices were developed by
SKBT VKT, YuVTl in cooperation with NIISF. Acoustic effect of the mufflers
is 25 dBA.
The noise mitigation activities listed above shall ensure meeting the sanitary
requirements.
Detailed calculation of noise reduction for each noise source shall be performed at
the next design stage accounting for frequency specifications of the noise
sources. Design of modern power plants reveals that with distance to
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