What process is used to ensure a confined space is completely protected from the release of energy and materials?

Isolation is the correct process used to ensure that a confined space is completely protected from the release of energy and materials. This practice involves disconnecting and securing all intended energy sources, such as electrical, hydraulic, pneumatic, or mechanical, which could potentially enter the confined space and cause harm. By implementing isolation, personnel can prevent any accidental release or introduction of hazardous materials, thus creating a safe environment for work.

Isolation typically includes locking out or tagging out equipment and systems that could pose risks, ensuring that no energy can inadvertently re-enter the space during operations. Proper isolation protocols are vital in maintaining safety standards for confined space entry and work, as they help mitigate the risks associated with hazardous atmospheres and potential physical threats.

In contrast, while processes like inerting, blanking, and sealing contribute to safety in different contexts, they do not fundamentally serve the same comprehensive purpose of energy and material prevention as isolation does.