Why is Titanium Dioxide added to the system?

Titanium Dioxide is added to the system primarily to prevent secondary side stress corrosion cracking. This particular application relates to the properties of Titanium Dioxide, which offers excellent corrosion resistance and can help mitigate the effects of various stressors found in high-temperature and high-pressure environments typical of nuclear power plants or other critical thermal systems.

Stress corrosion cracking can occur due to the combination of tensile stress and the presence of corrosive agents, often exacerbated by high temperatures. By incorporating Titanium Dioxide, the likelihood of such cracking is significantly reduced, thereby enhancing the safety and longevity of the system. Its effective use in this capacity is crucial for maintaining the integrity of components exposed to harsh conditions, ensuring reliable operation and reducing maintenance needs.

The other choices do not accurately reflect the main role of Titanium Dioxide. For instance, increasing conductivity or improving oxygen scavenging are unrelated to the protective qualities that Titanium Dioxide provides against corrosion. Similarly, while lubrication is an important aspect in some systems, it does not pertain to the specific benefits offered by Titanium Dioxide in the context of stress corrosion management.