Your question is unclear and broad. At a high-level:
-Review the analytical/protection requirements that your design code(s) require.
-Review the customer requirements for the design.
-Apply any best practices that your internal processes require.
In my experience (nuclear power plant piping), the experience is similar. For large portions of piping (and associated equipment) that we are fabricating offsite as a piece (module), we provide both the basic isometrics and larger arrangement drawings (showing valves, tanks, piping, etc.). We...
He is in a bind.
In the scenario required by the US NRC to be considered, you can start crediting assistance from temporary equipment stored in a hardened building onsite after 24 hours. You can start crediting in equipment from offsite (via helicopter usually) after 72 hours. This usually...
Nuclear power plant design engineer here.
Containment entries occur during at-power operation; it just is a pain-in-the-ass. Check with your Health-Physics department to see what the real expected dose rates in this area would be...alot of things get relaxed for off-normal scenarios.
What...
Typically, the "curlie-cue" symbol I see (attached to the "Circle-H" symbol) is a note to the drafter to remove that item. It may be that an engineer meant to indicate in the drawing for that item to be removed and it accidentally just got retained. This is just editorial convention though when...
