Page 92 - SD RATCH EN

92
Sustainability Report 2020
RATCH Group PCL.
Management of Tri Energy Power Plant’s decommissioning waste
The 720-MW Tri Energy Power Plant ceased operations on 30 June 2020 when the power purchase agreement with Electricity Generating Authority of Thailand expired.
RATCH reported the measures to prevent and control environmental impacts incurring from the dismantling to the Office of Natural Resources and Environment Policy and Planning, the regulatory body, for its acknowledgement. The report contained waste disposal methods.
A specialized company was contracted to handle the dismantlement, and the conditions and impact preventive and control measures was covered in the contract. The contractor’s operations are monitored and supervised on a daily basis.
Hazardous waste management under stringent oversight
The power plant gives utmost importance to the dismantling of electrical equipment that contains sulfur hexafluoride (SF6) and R22 refrigerant, the hazardous waste that may cause greenhouse gas and hence worsen global warming. The following disposal measures have been defined:
Sulfur hexafluoride (SF6)
Installed at the power plant’s power distribution station, as medium-pressure and high-pressure insulator in circuit breakers and switchgear
R22 refrigerant
Role at the power plant
Supporting the power plant’s cooling system
Disposal volume (kg)
184.4
417.4
Greater global warming potential compared to CO2 (times)
23,500
1,760
Greenhouse gas emissions if leaked to atmosphere (tCO2e)
Disposal/ elimination method
4,333
735
• Contract an industrial waste handler to dispatch the SF6 and R22-containing equipment to the Industrial Waste Management Center (industrial waste incinerator) in Bang Poo, Samut Prakan Province. The dispatch is done by a vehicle licensed for hazardous waste with 60 km/h speed limit and GPS system that allows control from the contractor’s control center.
• Eliminate in accredited incinerators for hazardous waste.