Meltdown Reactor
Quickstart
- Start a new world with the mod installed — a nuclear power plant structure generates near your spawn point automatically.
- Find the Reactor Core inside the plant (a sturdy block with a distinctive texture, found in the Construction tab of the creative inventory).
- Right-tap/interact with the Reactor Core to check its cooling status. Your chat will show how many Minecraft days remain before a meltdown.
- Keep a water bucket in your hotbar. Before the 7-day deadline, right-tap the Reactor Core while holding a water bucket to cool it. You'll see happy particles and hear a water sound confirming success.
- Watch your action bar and chat for
[Reactor] warnings — they appear when 2 or fewer days remain.
Overview
Meltdown Reactor populates your Overworld with functional nuclear power plant structures. Each plant contains a living Reactor Core that demands regular cooling. Neglect it and you'll face a catastrophic meltdown: massive explosions, a radiation disaster zone, and persistent Radioactive Waste contaminating the area for 14 Minecraft days. Maintain your reactors, or prepare for consequences.
What It Adds
| Block | Description |
|---|
| Reactor Core | The heart of each power plant. Tracks its own cooling timer; must be watered every 7 Minecraft days. Highly blast-resistant. Drops itself when mined with a pickaxe. |
| Radioactive Waste | Spawned after a meltdown. Replaces ground blocks in the blast zone. Drops nothing when broken. Can be mined (takes ~2 seconds) for cleanup. |
Structures
- Starter Nuclear Plant — Generates near your world spawn. Built from stone bricks, yellow and black concrete, iron doors, and other vanilla blocks surrounding a Reactor Core.
- Exploration Plants — Additional power plants appear deterministically as you explore new chunks. Each has its own independent Reactor Core and cooling timer.
How To Use
Cooling a Reactor
There are two ways to cool a Reactor Core before its 7-day deadline:
- Water Bucket (direct): Hold a water bucket and right-tap/interact with the Reactor Core. Your bucket is consumed and returned as an empty bucket. The core resets its 7-day timer.
- Place water nearby: Place a water source block within about 4 blocks of the Reactor Core. The mod detects adjacent water and resets the timer automatically.
After successful cooling, nearby players receive a chat confirmation:
[Reactor] Reactor core cooled by <name>. Next water required in 7 Minecraft days.
Checking Status
- Interact (empty hand): Right-tap the Reactor Core to see exactly how many days remain in the cooling reserve.
- Action bar: A status indicator appears on your action bar when you're near an active reactor.
- Warning messages: When 2 or fewer days remain, the mod broadcasts a warning to all players within ~64 blocks and plays a bass note sound.
Abilities And Mechanics
Meltdown
If a Reactor Core goes 7 Minecraft days without water, a meltdown triggers:
- A massive explosion destroys the core and surrounding structure.
- Lightning, huge explosion particles, and a deep booming sound play.
- The ground in a large radius is covered with Radioactive Waste blocks (replacing smooth stone, stone bricks, and grass).
- All players within ~80 blocks receive Poison II (20 seconds) and Blindness (8 seconds).
- The disaster zone persists for 14 Minecraft days before the area can be considered safe.
Persistence
All reactor timers, active plant locations, and meltdown zone states save across world reloads. You can log off safely — the timers keep running and you'll return to warnings or a meltdown scene exactly as expected.
Placing Your Own Reactor Core
You can pick up and place a Reactor Core block (found under Construction in the creative inventory). When placed, it registers as a new tracked reactor with a fresh 7-day cooling countdown. Breaking it with a pickaxe removes it from tracking and drops the block.
Progression And Strategy
- Early game: Locate your starter plant immediately. Note its position and establish a routine — cool it every 5–6 in-game days to stay comfortably ahead of the deadline.
- Exploration: Each new plant you encounter starts its own independent timer. Spreading across the map means juggling multiple reactors. Consider keeping a dedicated water bucket in your inventory at all times.
- Meltdown mitigation: If a meltdown does occur, stay outside the ~80-block radius until poison and blindness effects are no longer a threat. Bring a pickaxe to clear Radioactive Waste blocks — they take ~2 seconds each and drop nothing, so cleanup is purely cosmetic/structural.
- Containment builds: Since Radioactive Waste replaces surface blocks in a ~10×10 area around the core, you can pre-build containment walls of blast-resistant material around vulnerable plants to limit structural damage.
- Multiple reactors: Plan travel routes between plants so you can service each core within a single play session. The action-bar status and chat warnings make it easy to triage which reactor is most urgent.
