A cArbon cApture And storAge network for yorkshire And humber
A cArbon cApture And storAge network for yorkshire And humber
A cArbon cApture And storAge network for yorkshire And humber
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5.11 SAFETY IMpACTS<br />
Any specification <strong>for</strong> a CO2 pipeline must<br />
consider the safety issues associated<br />
not only with CO2 but with each of the<br />
contaminants. Whilst the consideration of<br />
the safety impact was not strictly within the<br />
scope of this report it has been considered<br />
in depth.<br />
The danger from a CO2 transmission system<br />
is essentially the occurrence of leaks both<br />
short term and long term. Whilst the CO2 is<br />
hazardous the impurities it may contain, such<br />
as hydrogen sulphide are significantly higher.<br />
There<strong>for</strong>e in considering dispersion and the<br />
effects of a release the contaminants must<br />
also be considered ensuring as a minimum<br />
they stay within their short term exposure<br />
limit (STEL) and the SLOT/SLOD data from<br />
the HSE.<br />
5.12 pROJECT SpECIFICATION<br />
Given the discussion in the previous<br />
section the specification from the Dynamis<br />
project provides a reasonable basis. The<br />
contaminant levels specified are such that<br />
they minimise the risk of hydrate and free<br />
water <strong>for</strong>mation, ensure the stability of the<br />
fluid at a typical pressure range. In addition<br />
the hazardous contaminants H2S, CO, SO2<br />
and NO2 have limits such that they are<br />
significantly lower than their accepted<br />
STEL values.<br />
Carbon Capture and Storage Network 19<br />
Table 5.5 Dynamis SP3 recommended entry specification<br />
Component Limit<br />
CO2 >95%<br />
N2<br />
Ar<br />
H2<br />
O2<br />
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