Fusion core

A cutaway diagram of Deep Space 9's fusion core

The fusion core was a section of Deep Space 9 and other Nor-class space stations. The fusion core made up the bottom part of the lower core section of the station and housed six fusion reactors which provided power for the facility. In the construction of Terok Nor the fusion core was built in the fourth stage of the station's assembly, following the completion of the structure of the rest of the central core sections. In emergency situations the entire fusion core could be ejected from the station, as an overload in the core would obliterate anything within a hundred kilometers. (DS9 reference: Technical Manual; DS9 novel: Avatar, Book Two)


Since Starfleet took over operation of Deep Space 9 they only maintained four of the six fusion reactors as the remaining two were rated borderline for safety reasons so were kept powered down. (DS9 reference: Technical Manual)

In April 2376 a trio of rogue Jem'Hadar fighters attacked DS9, they were destroyed before they could destroy the station themselves but four of the crew were able to beam aboard the station. The Jem'Hadar, led by Kitana'klan, remained shrouded and attempted to make their way to the stations fusion core to initiate an overload and destroy the station. Another Jem'Hadar, Taran'atar, also beamed to the station, but worked to stop the rogues, successfully killing three of them before they achieved their objective. (DS9 novels: Avatar, Book One, Avatar, Book Two)

Unfortunately he was not able to get to Kitana'klan before he was successful. By this time the station's personnel had also become aware of the situation and a team led by Kira Nerys and Elias Vaughn had also been tracking Kitana'klan. When they realised they were too late they, with Taran'atar, proceeded to the upper levels of the lower core where Kira initiated the lower core emergency separation. The fusion core was jettisoned, and 120km away from the station exploded, pushing the station out of its position but not destroying it. The explosion could be seen from Bajor. (DS9 novels: Avatar, Book Two, Abyss)

Without its fusion core the station was nearly powerless. Fortunately shortly after the incident an allied fleet arrived, in response to the initial Jem'Hadar attack. At the suggestion of Jean-Luc Picard each of the Federation vessels in the fleet donated an energy generator to the station. (DS9 novel: Avatar, Book Two)

The generator network allowed the station to continue basic operations for a fortnight until a plan devised by Nog brought a new fusion core. A fleet of nine vessels were used to tow Empok Nor to the Bajor system, and shortly after the other station's fusion core was connected to DS9, restoring full power. (DS9 novel: Abyss)


Deep Space 9 sections, facilities and establishments (original station)
sections central core (upper coremid-corelower core - fusion core) • habitat ringdocking ringdocking pyloncrossover bridgedefense sail UFP seal BajoranEmblem Starfleet Command logo DS9 insignia
facilities amphitheatre (01-005) • assay officeBajoran Consulate (01-501) • Bajoran Customs Office (01-484) • Bajoran templeCargo Loading and Transfer (01-106) • chief engineer's office (01-409) • dockmaster's office (01-843) • Federation Consulate (02-375) • geological assay office (02-487) • Klingon Consulate (02-620) • Import Protocol Office (02-583) • infirmary (02-682) • lodging and accommodations (02-294) • Medical Doperations centerpromenaderunabout pads (ABCDEF) • schoolroom (03-855) • spacecraft resupply (02-992) • security officestation commander's officestation operations (03-658) • station security (03-582) • subspace communications (03-584) • Tourism OfficeVulcan Embassy (03-589) • wardroom
establishments Andorian Fast Food (01-754) • Bal CabarinBanzai Institute (01-088) • Berman's Dilithium Supply (01-034) • bowling alley (01-854) • Cavor's Gravity Devices (01-332) • Curry's Martial Arts Training (01-112) • Del Floria's Tailor Shop (01-383) • Diet Smith Corporation (01-892) • Diva Droid Corporation (01-874) • Forbin Project (02-874) • Fredrickson's Squid Vendor (02-587) • Garak's Clothiers (02-485) • Gocke's House of Mirrors (02-875) • Jacobson's Used Photons (02-754) • Jupiter Mining Corporation (02-842) • Milliways (02-984) • Pancho's Happy Bottom Riding Club (02-111) • Quark's (02-854) • ReplimatReplimat Cafe (02-395) • Richarz' Accessories (02-734) • Rush Dilithium Crystals (02-742) • Sirius Cybernetics Corporation (02-643) • Spacely Sprockets (02-023) • Tom Servo's Used Robots (03-585) • Vince's GymYoyodyne Propulsion Systems (03-853) • Chez Zimmerman (03-841) • Celestial CaféGalactic AdventuresGalactic Pets UnlimitedGames BazaarGarak's ClothiersGreengrocersKalaw's Klingon KitchenKlingon restaurantMultiplexSpican JewelersStarlight LoungeT'Pril'sWaverly's Wonderful World of DuotronicsUnnamed Promenade Establishments
Deep Space 9 facilities and establishments (second station)
facilities HubMemorial DeckNanietta Bacco ParkObservation GalleryPlazaSector GeneralStockade complex
establishments Alidosa's Fine ArtBella's ConfectionsCafé ParisienneQuark'sReplimatSports & Recreation Reservation OfficeStarlight Gems & JewelryVestel's Deep Space Night ClubWorlds Apart
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