Company: NKLR
Filing Date: 2025-12-16
Form Type: 424B3
Source: 0001213900-25-121900
Chunk: 99

Company: Terra Innovatum Global N.V.
Filing Date: 2025-12-16
Form: 424B3
Chunk 99
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 a solid
heterogeneous Beryllium and Graphite matrix.

<div align='center'>53</div>

Coolant

SOLO is Helium cooled. The
coolant, which is helium gas, enters the bottom of the reactor, is heated while passing through dedicated channels adjacent to the fuel
rods and collected into the upper plenum. Keeping a physical separation between the coolant and the fuel rods is a very important design
feature. After being heated, the helium moves from the upper plenum to a heat exchanger transferring the heat to the secondary circuit
for the production of electricity.

Multiple Redundant Shutdown Mechanisms

The reactor is controlled
when everything is operating normally using 12 control blades. It is built with a N+4 redundancy: 8 out of 12 blades are sufficient to
shut down the reactor. In addition to the control system, we built 4 different active and passive redundant shutdown mechanisms; each
of which has its own redundancy. These 4 shutdown systems can be relied upon in case of malfunction or incident:

| ● | 12                                                              
 shutdown blades: 8 of which are enough to shut down the reactor |

| ● | 12                                                             
 shutdown drums, 6 of which are enough to shut down the reactor |

| ● | 6                                                                
 shutdown pellets, 2 of which are enough to shut down the reactor |

| ● | If                                                                                         
 those three systems fail, a mechanism injecting helium 3 into the reactor can be activated 
 to shut down the system                                                                    |

<div align='center'>54</div>

Monolith: Biological Shield

SOLO is encased in all sides
by the 2.5m thick concrete block, the Monolith, serves as a biological shield from radiation and the decay heat removal system. With
the Monolith, decay heat is removed by natural convection. Because almost non-existent radiation reaches the outside of the Monolith,
we expect that an EPZ will be limited to its operation boundary. That means you can build a SOLO anywhere and allow humans to walk right
up to it.

Competitive Strengths

Unique Technology and Safety Features

SOLO has been purposefully
engineered as a compact 4MWt/1MWe reactor to prioritize safety. Its low thermal power output eliminates the risk of core meltdown. By
using helium as a coolant instead of water, SOLO also avoids the danger of hydrogen explosions. Additionally, helium’s inert nature
means it doesn’t become radioactive