NT Worksafe has launched an investigation after a woman was hospitalised at the Darwin Festival last week.

The 28-year-old technician was adjusting a fire effects device that failed to detonate during a show, when it exploded, burning her face, arms and chest.

She had to be taken to the Royal Darwin Hospital for treatment, and is now recovering.

NT WorkSafe says the malfunction in the device known as the "SAFEX-FLAMEJETT" is still unknown.

The FLAMEJETT is a small black box that ejects a pillar of flame about 3 metres high.

It will not appear in the upcoming performances of the show, and the production company that owns it is currently reviewing its future use in consultation with NT Worksafe.

Darwin Festival chief executive Emily Mann said the Limbo performance - a mix of cabaret, circus and acrobatics – will continue.

“The show is as spectacular as it always will be,” Ms Mann said.

“[The device] is a more an enhancement of the show.”

Ms Mann said the festival has the “highest standard of safety” was in place.

“The production team has the highest standard of safety in place and uses qualified techs,” she said.

“At no time during any performance is the audience, or performers or crew at any risk from injury.

“We have no concerns. The show is a runaway success, we have a sell out night after night and we looked forward to all the people of Darwin coming along to enjoy the rest of the season of Limbo.”