SubCargo Reactor and Fuel Rods

Power is the silent win condition in SubCargo’s Roblox alpha. DeltaCore Studio’s CTV Atlas—the Hadron-built cargo transport vessel you pilot—is a nuclear submarine that runs on fuel rods. Run out of power and lights, oxygen generation, and other core machines shut down; keep flooding the reactor room and those machines die early even if rods remain. This guide consolidates community-verified reactor rules so engineers stop guessing mid-delivery.

If you only skim one systems page besides Ballast and Systems, make it this one. Fuel mistakes wipe more alpha crews than Larry does on shallow routes.

Why the CTV Atlas needs two rods

Community documentation for Hadron’s sub states the Atlas uses two fuel rods in the reactor. Loading only one rod causes instability and drains the core faster than a balanced dual-rod setup. Treat single-rod play as an emergency limp, never as a budget strategy.

When both rods are seated correctly:

• Core burn is more stable across long ocean-vein legs
• Engineers can plan dock stops around known burn windows
• Oxygen and lighting stay online while repair teams weld

When power finally hits zero, expect shutdown of core functions—lights, O2 generation, and related machines—followed by hull stress that eventually cracks the sub and kills the crew. Full reactor meltdowns are not currently scripted as a separate event in documented alpha builds; blackout-plus-hull-failure is the practical end state.

SubCargo gameplay reference for systems and pacing

Fuel rod economy at ReCore

Every dock spawns ReCore, which sells fuel rods:

• Price: about $320 per rod
• Stock: typically three rods for sale
• Free tip: every game, a free fuel rod spawns on top of the ReCore shop—grab it before someone else does

Community timing puts a rod’s useful burn around ±8 minutes, with variance from route load and ping. Plan deliveries so you never enter a Larry fight or structure dive on a near-empty core.

Cross-check purchase order with Dock Shops and the Crew Checklist so the pilot or engineer owns fuel duty aloud.

The 20% water rule

Hadron documentation notes that machines—including the reactor and oxygen generation—shut off after the room’s water level reaches 20% or more. That means flooding is not only a hull-integrity problem; it is a power problem.

Practical implications:

1. Prioritize welding the reactor/engine room above cosmetic storage leaks—see Hull Repairs.
2. Close doors early to keep water out of engineering while divers return.
3. Do not celebrate a “dry bridge” if engineering is already past the 20% threshold.

Pair this rule with ballast discipline. A sinking sub that floods engineering mid-fight will black out pumps and turrets even if rods still show charge.

Engineer loop for stable power

1. Dock check — collect the free ReCore rod, buy spares to hold two installed + one backup when credits allow.
2. Seat two rods — confirm both slots before undocking.
3. Call burn time — announce when you estimate under four minutes remaining.
4. Protect the room — keep water under 20%; mop and weld before shopping greed.
5. Never both leave — on duo crews, one player stays near reactor controls while the other shops or dives.

Solo and duo players should read Solo Runs for compressed duty stacks that still respect fuel ownership.

Linking fuel to deliveries and combat

Long Cargo Delivery routes burn rods faster than short dock hops. Structure farming in Diving and Structures often costs an extra rod if you loiter. Larry encounters on Beat Larry become unwinnable when lights and O2 die mid-fight.

Budget rule of thumb for alpha crews:

1. Welder / wrench first (survive breaches)
2. Dual rods + free ReCore grab (survive blackouts)
3. Budget gun for Larry
4. Luxury APS or cosmetics last

Lore context without spoilers

Hadron manufactures the Atlas and operates docks across the Ocean Veins after the surface became uninhabitable. Players are effectively corporate freight employees, not free pirates. For corporation backstory and setting timeline, read Hadron and Lore. Reactor mechanics on this page stay grounded in gameplay facts, not speculation.

Alpha caveats

SubCargo remains early access. Rod burn time, shop stock, and flood thresholds can change. After patches, re-time a quiet dock run and update your crew callouts. Track changes on Patch Notes 0.2 and Alpha Overview.

Related pages

• Ballast and Systems — pumps and trim that keep engineering dry
• Hull Repairs — stop the 20% flood trigger
• Dock Shops — ReCore prices and free rod tip
• Hadron and Lore — who built the Atlas
• Guides Hub — full walkthrough index