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Principle

39. Inert Environment

a. Replace the normal environment with an inert one
b. Carry out the process in a vacuum

  • Principle Description:  Create a neutral (inert) atmosphere or environment in order to support a desired function.

  • Hints on Usage:  To use this principle, first understand the system’s associated risks — what prevents the realization of a desired function?  Decide what must be protected, then create an inert atmosphere or environment for that parameter.

  • Consider the types of possible atmospheres or environments:  vacuum, gas, liquid or solid.  A solid inert atmosphere can include neutral coatings, particles, or parts.

  • Do you need an all encompassing or localized environment?

  • Do not only consider chemically inert environments.  Also consider “environments that do no create harmful interactions”.

  • For non-physical systems, how would you make an environment inert to support a desired function?

Examples:
  • Inert atmospheres are used in many manufacturing processes, such as:

•Inert gases are used in heat treatment processes to control part oxidation and to reduce the risk of fire or explosion.

•Argon gas replaces air over vessels filled with molten iron in foundries.

•Nitrogen and CO2 control the atmospheric oxygen content inside aircraft tanks to prevent unwanted fuel ignition.

  • Nitrogen, CO2, and water are all used to remove hazardous fuel vapors from an empty tank so the tank can be safely welded.

  • Deprivation tanks create an environment where all sound and stimulation are removed. These neutral conditions help reduce all stresses on a body and create an atmosphere uniquely suited to meditation.

  • A vacuum tube functions with a self-contained inert environment as does a light bulb.

  • We build our homes to have weather-neutral environments so we live more comfortably.

  • Team facilitators create safe (inert) environments so team members can speak freely.

  • Psychologists set conditions so patients can openly verbalize thoughts and concerns they have not even shared with loved ones.

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