The following corrective actions have been taken:
The non-return valve was dismantled, cleaned, and tested. Following positive testing, the system was restarted and pressurized without any further malfunctioning.
The hydrogen discharge pipe was extended from the low roof of the compressor building (2.5 m) to the higher roof of a neighboring building (6 m). With this modification, any potential hydrogen ignition would occur at approximately 6 meters from ground, farther from personnel than the 2.5 meters of the previous situation.
The compressor was sent to the manufacturer for preventive maintenance in order to lower the frequency of component malfunctioning.
Plans for regular maintenance of the non-return valve will be recorded in the next revision of the Design and Safety Report.
A flame arrestor was purchased and mounted at the end of the exhaust pipe on top of the building.