Haneul Nuclear Reactor in MW4 DMZ: an atom sculpture in front of two cooling towers in radioactive fog — Screenshot: Call of Duty: Modern Warfare 4 © Activision (enhanced)

Northeast Hajin · Former South Korean side

Haneul Nuclear Reactor: MW4 DMZ Location Guide

A damaged reactor site under a cloud of radioactive vapor. Protective gear and a gas mask are needed to survive there. Highest threat: High.

Last updated October 20, 2026Game version: Pre-launch (official intel, October 2026)

◆ Fortress · ■ Compound · L Lieutenant Tower · U UAV Tower · A Ammo Armor Cache · G Gas Station · M Marine Gas Station. Rings show the highest threat level (Low, Medium, High, Critical, Extreme); the white ring is Haneul Nuclear Reactor. Smaller markers from Activision's official Hajin Tac Map. Screenshot: Call of Duty: Modern Warfare 4 © Activision (enhanced)

Threat level by area

Reactor (with radiation)	High
South Korean Border Zone	Medium

See it on the interactive Hajin map, where you can switch on every kind of marker and zoom in.

What to expect at Haneul Nuclear Reactor

Radiation is strongest inside the reactor building
The blog says a breach covers the containment block and Reactor 02; Reactor 01 is still stable
Possible ways in: by water, or through a tunnel from Compound Delta to the southwest
Fire Stations are where the blog says to look for Radiation Gear

Keys for Haneul Nuclear Reactor

Reactor DRC Locker (grid H4): The DRC Weapons Locker inside Reactor 02's irradiated pool.
The Chemist's Secure Armory (grid I4): A secured bunker near the reactor's boat house. One source so far, not yet verified.

Every key, with where it comes from and a checklist of the ones you have, is in our MW4 DMZ key finder.

Missions at Haneul Nuclear Reactor

Operation Fallen Ember (Story Mission): 5 steps, rewards Reactor DRC Locker key, Cargo Plane (Paid Infil), 25,000 DMZ Cash.

Every step, with a checklist that remembers your progress, is in our MW4 DMZ missions checklist.

Marked around Haneul Nuclear Reactor on the official Tac Map

These are the places on Activision's official Hajin Tac Map that are closer to Haneul Nuclear Reactor than to any other major location (our grouping, by distance on the map). Named areas: Russian Border Crossing (East).

1 Lieutenant Tower: Climb the tall comms tower and use the laptop at the top to get intel on a nearby Lieutenant.
1 UAV Tower: Activate one for a Side Op, DMZ Cash and a pulse that shows nearby players and enemies.
3 Ammo Armor Caches: Refill ammo and Armor Plates, often inside enemy compounds. Each cache has a cooldown after use.
1 Marine Gas Station: A small jetty with two pumps for repairing and refueling boats; Gas Cans can be refilled too.

Nearby major locations

NuriGO Mall to the southwest, highest threat High.
Cheongun Village to the west, highest threat High.
Mirae General Hospital to the southwest, highest threat Low.

Keys, locked rooms and exfils are added here once they are confirmed in play. How threat levels work is in our guide to DMZ threat levels and enemies, and the list of all Hajin map locations compares every place side by side.

Questions

Where is Haneul Nuclear Reactor in MW4 DMZ?

In Northeast Hajin, on the former South Korean side. The closest major locations are NuriGO Mall to the southwest, Cheongun Village to the west and Mirae General Hospital to the southwest.

What is the threat level at Haneul Nuclear Reactor?

Reactor: High; South Korean Border Zone: Medium. Threat rises when you fight there and drops again once you break contact.

Every Hajin location

Sources

Checked against the official posts on October 19, 2026. Before launch, everything here is Activision's own description; we update the page once the game is out and details can be confirmed in play.