See attached photographs for a picture of what we encountered during a safety inspection.
The temporary power distribution panels were found during an area safety inspection. I am not an electrician, but at least 2 of the 3 don't look right to me. Temp Power2 may be ok in that at least the...
I have what I need for check valves. As for the other valves of concerns (solenoid operated valves, air operated valves, etc.), I have decided that I'll have to rely on the concensus of opinion in various documents, especially those by the DOE, as they are closely related to the type of systems...
jt,
[bigsmile] I did ask...now I have to answer the "what tells me I can't use a check valve with 2,500# of water behind it holding it closed as an isolation point?"
I have also been told that in some cases there aren't two in-line valves and also in some cases there is not drain or vent valve...
HEC,
You are exactly right on what I am looking for. In fact, the information from previous threads that discussed the double block and bleed valves are what lead me to the information I have found so far.
The problem with the nuclear industry is it almost takes an act of god to make changes...
Thanks. Checking the NRC Information Notices is an excellent suggestion. I'll do that.
I did find a prohibition against using check valves as an "energy source isolation" in MSS SP-92-1999, Valve User's Guide. I just wished it had been as helpful on the other type valves mentioned in the...
Thank you for the reply. I will probably go with what I have. I work in nuclear power and it has been my experience that unless I can provide to some hard requirement, the operator's are reluctant to accept my input.
I think what I have may be sufficient, I was hoping I was just overlooking...
I found the following definition from the semiconductor industry:
Definition of shutoff valve: A valve designed for and capable of positive closure to prevent flow within a piping system. Typical shutoff valves include, but are not limited to, manually-actuated, power-actuated, or...
