Page 41 - igem-g-4 edition 2

IGEM/G/4 Edition 2
safe-start check
Means to provide safety shut-down or lockout on starting-up if a simulating condition is
indicated by the flame safeguard in advance of the ignition phase.

safety audit
Critical examination of all, or part, of a total operating system with relevance to safety.

safety case
Document containing the particulars for safe operating practice, as required by the Gas Safety
(Management) Regulations (GS(M)R).

safety measure
Any means that eliminates or reduces a risk.

safety report/safety case
Presentation of a justification for the safety of an installation.

safety shut-down
Shutting off of all gas and ignition energy.

safety shut-off system
System of safety shut-off valves (SSOVs) with associated control circuits that enables the
supply of fuel to be shut off.

safety shut-off valve (SSOV)
Valve that is actuated by the safety control so as to admit and stop gas flow automatically.

safety shut-off valve system (SSOV system)
System of SSOVs with associated control circuits which enables the supply of gas to a burner
to be admitted or shut off.

scheme of examination
Written scheme referred to in Regulation 8 of the Pressure Systems Safety Regulations
(PSSR).

seal
Means of indicating that equipment has remained as originally fitted and set, and of deterring
unauthorised tampering.

sealant (seal medium)
Liquid used to form a gastight seal around the periphery of the piston in a waterless
gasholder.

seasonal storage
Facility to enable extra input into a system at time of high demand over a limited number of
days in a severe winter.

secondary grade of release
Release which is not expected to occur in normal operation and, if it does occur, is likely to do
so infrequently and for short periods.

secondary meter
Meter, other than a primary meter, for ascertaining the quantity of gas provided by a person
for use by another person, whether or not there is also a primary meter in respect of the gas
supplied.

secondary sterile area
Area bounded by a specified contour measured in power per area in the event of the ignition
of multiple vents.

37
©IGEM, IGEM House, High Street, Kegworth, Derbyshire, DE74 2DA. Website: www.igem.org.uk