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DEESIDE POWER - ENVIRONMENT
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Environment - Introduction

There were no reportable incidents or breeches of the conditions of the Environmental Permit during 2016.

Deeside operated regularly during the year, although in ‘two-shift’ operation. This is the term given to plant operation requiring start up and shut down within the same day. The plant still emits significantly less greenhouse gas and acid forming gas emissions than coal-fired power plants due to low sulphur content of the fuel gas and relatively low NOx emissions.

At the end of March 2015, due to the demand in output from gas fired plants Deeside declared its capacity on to the National Grid down to 260 MW (half its previous capacity). This means that it can only run one of its two gas turbines for normal electricity market trading. However it has also secured a “Supplemental Balancing Reserve” (SBR) contract with National Grid to meet Winter Peak Demand in emergency conditions. When called upon under this contract both gas turbines need to run simultaneously. We successfully delivered this extra capacity during 2015 and 2016 winter periods.

The emissions from the gas turbine stacks are continuously monitored as required by the site Environmental Permit that is policed by Natural Resources Wales (NRW). In 2016 we remained compliant with BS EN 14181 as required by the Large Combustion Plant Directive. The site has never exceeded its authorised limits to air since commencing commercial generation in 1994.

From 1st January 2016 Deeside began operation in the UK’s Transitional National Plan (TNP) in accordance with the EU Industrial Emissions Directive. A new Environmental Permit has been issued by Natural Resources Wales (NRW) effective from that date and specifies new lower emissions limits which must be complied with. In order to comply with the requirements of the TNP Deeside also carried out Gas flow Emissions tests to verify the quantities of mass emissions reported.

Deeside has maintained the integrated standards required under ISO 14001 for Environmental Management, OHSAS 18001 for Health and Safety Management and ISO 9001 for Quality Management, and was successfully re-certificated for a further three years in 2016.

Further details of our environmental policy and improvement programme can be obtained from the site

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