Flare Package System Design and Application

A: C is unrelated to the seal; header overpressure is governed by relief rates and line sizing. A is a primary seal function and is lost. B follows directly once the water leg is gone. D becomes credible when air ingress and hydrocarbons mix.

A: C keeps oxygen displaced before fuel is introduced and ignition follows immediately. A delays fuel introduction until after ignition command, risking no light-off. B introduces fuel before purge is established. D mixes steps and relies on delayed indication, not local confirmation.

A: A matches low-load smoking with normal steam supply; over-steaming breaks flame stability. B would show reduced steam flow. C is a peak-load issue, not minimal flow. D causes flame distortion, not persistent smoke at low duty.

A: A follows contractual precedence and is auditable. B sounds safe but overrides contract without MOC. C creates mixed bases that can't be defended. D shifts responsibility and doesn't resolve the edition conflict.

A: B is still credible since emergency use doesn't remove exposure risk. A is covered by the study result. C would require much higher flux or duration. D is unrelated to radiation criteria.

A: A gives physical confirmation that air displacement is happening. B is ideal but not minimum for pre-start. C shows command, not flow. D doesn't confirm installation or current condition.

A: A aligns with transient, high-energy gas release. B would persist during heat-up. C would show liquid carryover evidence. D is independent of PSV lift events.

A: A uses available space to manage noise directly. B reduces noise somewhat but radiation and visibility remain. C adds noise and complexity. D ignores the stated noise constraint.

A: A creates an auditable decision path under change control. B ignores the PO wording. C may introduce new risks without assessment. D relies on absence of failure, not design basis.