Which reason supports the need for lightening protection in tank bund design?

The need for lightning protection in tank bund design is primarily supported by the reason of preventing explosions. Tank bunds are often used to contain hazardous materials, including flammable liquids stored in tanks. When lightning strikes, it can create a significant risk of ignition if there are flammable vapors present. If lightning strikes a tank directly or nearby, it could cause an electrical discharge that ignites vapors or the contents of the tank itself, potentially leading to a catastrophic explosion.

Incorporating lightning protection systems in the design of tank bunds helps mitigate this risk by directing electrical charges safely into the ground, thereby preventing any dangerous reactions. This is a crucial safety measure to protect both people and the environment, as explosions can have severe consequences.

The other reasons like enhancing aesthetics, ensuring ease of access, or improving operational efficiency do not directly address the critical safety concern posed by lightning risks to flammable substances stored in tanks. Therefore, their relevance to the necessity of lightning protection is minimal compared to the risk of explosions.