Find an Irradiated Container in a yellow Chemical Storage locker, then take it to the cleansing machine on the ground floor of Reactor 02 at Haneul Nuclear Reactor. Process the box, reopen the machine to collect its contents, and extract with the loot. Bring radiation protection before entering the facility. Finding the box is random, and its rewards vary.
Already carrying one? Skip the search and go straight to entering Reactor 02. A container is an item you carry to the machine; the yellow Chemical Storage locker is the container you search to find it.
Find the yellow Chemical Storage lockers
Use the Tac-Map to identify clinics, then search their medical rooms for the tall yellow lockers labelled Chemical Storage. Check the item name when the loot appears: a red highlight alone does not identify an Irradiated Container. Small first-aid cabinets and ordinary weapon lockers are different search targets.
Clinics are a useful starting point because they are spread across Hajin. Larger clinics can have lockers in more than one room, so check the back rooms before moving on. The clinic and reactor walkthrough shows the yellow lockers and demonstrates finding another container inside the nuclear facility. The longer clinic search route explicitly notes that individual lockers do not guarantee a box.
| Search area | What to look for | When to include it |
|---|---|---|
| Ordinary clinics | Yellow Chemical Storage lockers in medical rooms | Check nearby clinics while moving toward the reactor. An empty locker is a normal result. |
| Large fire stations | A locked Fire Station Storage room containing yellow lockers | Search the station for its matching key. Check whether someone has already opened the room; avoid depending on window-entry glitches. |
| Mirae General Hospital | The locked Hospital Chemical Lab and additional locked chemical lockers inside | Use the matching lab key; the inner lockers require their own keys. This detour is useful when you already have the keys. |
| Chang-san Air Base clinic | Several Chemical Storage lockers across the clinic's rooms | Optional for a prepared squad or an experienced solo player. The air base is a dangerous detour. |
| Nuclear reactor buildings | Yellow lockers inside the facility | Search while equipped for radiation. A box found here can be processed without another cross-map trip. |
For the fire-station option, look through the lower-floor rooms and shelves for the Fire Station Storage key, then use it on the upstairs storage door. The fire-station demonstration shows the key search and two yellow lockers inside. The key's exact resting place can differ; do not build the run around a single desk.
At the hospital, the lab key and the keys for its inner lockers are separate. The hospital route demonstration searches the upper-floor offices for the lab key and the lower morgue area for locker keys. Skip that detour if the search is consuming the time or supplies you need for the reactor.
Once you have a box, put it in a Secure Slot if your backpack has one. The official FOB guide explains that these slots protect eligible stored items if you fail to exfil. Leave room for the contents you intend to bring back, including a weapon slot if you want to keep a weapon from the box.
Prepare before entering the radiation
Haneul Nuclear Reactor is in northeast Hajin. Identify the damaged Reactor 02 rather than the intact Reactor 01. The official Hajin guide confirms severe radiation around the site, stronger concentrations inside, and a breach across Reactor 02.
Bring gas masks with usable durability, preferably durable masks with spare protection, plus healing supplies and equipment for the guards. Inspect your mask condition before setting out. A nearly depleted mask can fail before you reach the machine; enemy mask drops are not a dependable substitute for packing your own.
Hazmat suits can be found within the reactor complex, including medical-tent and interior locations. Treat them as a possible resupply, rather than an item that will certainly be waiting at one wall. They provide longer-lasting protection during the raid and disappear when you leave. Continue watching your protection and health instead of assuming unlimited immunity. The decontamination walkthrough explains the raid-only suit, while the solo opening guide stresses bringing spare masks and monitoring them.
If Operation Fallen Ember is already unlocked, selecting it is an optional way to begin near the reactor and follow its approach markers. It is not required to process the container. You can travel to the facility during another deployment; do not delay opening a box solely to unlock that mission.
Reach the machine inside Reactor 02
A boat approach to the facility's western or northwestern waters is one demonstrated route. The official Hajin guide also identifies waterborne insertion as possible. Road approaches are available, but give yourself enough protection for any fighting or navigation delays.
- Approach the damaged reactor from the water side. Leave your boat where you can return to it. Locate the gap in the perimeter fence and the damaged exterior staircase leading toward the open reactor structure.
- Climb the exterior stairs and ladders. The demonstrated route uses a yellow ladder, then another dark metal ladder, to reach the broken upper structure. You are aiming to enter the breached Reactor 02 from above.
- Work down to the ground floor. Use the remaining walkways and platforms, clearing guards that threaten your descent. Do not jump blindly into the middle of the room while enemies above still have a clear shot.
- Find the processing chamber beside the damaged yellow platforms. Look for the machine with the Process Radioactive Material interaction. This is the destination for the box, rather than a locked loot room elsewhere in the facility.
- Place the Irradiated Container in the machine. Wait for processing to finish, then interact again to search the processed container and take its contents.
The boat-to-machine walkthrough shows the approach and operation; the solo decontamination run independently demonstrates descending into the same chamber. Use the visible stairs, breach, and machine to orient yourself rather than relying on a guessed map coordinate.
If you cannot see the processing prompt, confirm that you still have the Irradiated Container in your backpack and that you reached the processing chamber inside Reactor 02. You do not need to complete the story mission or open a separate keyed locker to use this machine.
Collect the rewards and leave
The recorded openings produce different combinations of weapons, Weapon Manuals, equipment, and valuables. Make space for the items you want before leaving the chamber. There is no supported fixed weapon, manual, reward quantity, or published drop rate to promise for your box.
Move valuable eligible items into Secure Slots, then leave the radiation and head for an available exfil. Processing the container does not automatically extract you. Activating Fallen Ember also does not turn this opening procedure into a free mission extraction. Keep enough mask protection and time for the exit, rather than spending everything reaching the machine.
For a normal exfil, locate an active site, call the helicopter, defend the position, and board it. Other squads can contest the extraction. The official Hajin guide warns that exfil signals can attract ambushes, so choosing a route out is part of the opening run.
A Weapon Manual found inside still needs to be extracted to unlock its matching weapon for purchase. See Weapon Manuals and permanent Gunsmith access for that process. If you only wanted to open the container, collecting the loot and extracting completes the trip.