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Sources say that two more east Texas refineries have returned to normal operation.

People familiar with the plant's operations said that Motiva Enterprises’ 640,500 barrels per day (bpd), Port Arthur, Texas refinery, along with two other refineries in the east Texas Gulf Coast, were now operating normally following repairs.

Sources at both plants say that the Motiva refinery in Louisiana and Valero Energy’s Port Arthur refinery with a capacity of 380,000 bpd suffered multiple malfunctions due to a loss of nitrogen gas.

Sources familiar with the operations of the plant said that the TotalEnergies Port Arthur refinery, which produces 238,000 bpd, suffered a boiler failure on October 26. This caused the refinery's steam supply to be cut off. Steam is needed both for the production of electrical power and the refining of crude.

Marie Maitre, spokesperson for TotalEnergies, declined to comment on the operations of the refinery.

No comment was received from Motiva or Valero's spokespersons.

Sources claim that the Motiva refinery restarted its units on October 27, after the nitrogen supply was interrupted.

Sources claim that Valero's refinery units restarted Tuesday.

Sources said that TotalEnergies units were operating again by mid-week.

Sources said that TotalEnergies' disruption occurred just days after the refinery completed a two-month planned overhaul.

TotalEnergies started the overhaul of the 35,000 bpd Continuous Catalytic Reformer (CCR) in mid-August. The CCR, three diesel hydrotreaters that have a combined throughput capacity of 84,000 bpd and a naphtha hydratreater with a throughput rate 42,000 bpd along with an sulfur block and the 40,000 bpd ACU-2 CDU with its 51,000 bpd Vacuum Distillation Unit-1 (VDU-1 (VDU),

ACU-2 was closed, but ACU-1 CDU continued to operate at 150,000 bpd.

CDUs work at atmospheric pressure to break crude oil down into feedstock for other refinery units.

The VDUs are also capable of converting crude oil to feedstocks but they operate under vacuum pressure.

Reformers add octane boosting components to unfinished gas by converting refining waste.

Hydrotreaters are used to remove sulfur from motor oils and feedstocks in order to comply with U.S. Environmental rules. Reporting by Erwin Seba, Editing by Muralikumar Aantharaman and Himani Skar

(source: Reuters)