Powernet: Questions on PCEs

[Eric . Goldin]

Got three "benchmark" questions on PCEs:

First, do any of you have a PCE occurrence rate you can send to me?  In other words, number of PCEs per 10,000 RCA entries or something like that?  Make it a little easier to compare performance due to outage scope.

Secondly, for both outage and online PCEs, what's a ballpark percentage that you declare "clean area PCEs"?  Those we define as having occurred when a worker entered the RCA, never went into a CA, and then came back to the control point with some contamination - typically on a shoe but no obvious source can be found.  

Lastly, some folks call any small contaminant a "particle."  I'd like to restrict true particle contamination to pure Co-60 discrete pieces of either Stellite or pure fission products from fuel (that are not the problem they used to be).  The reason I'm asking is that we've seen some contract non-HP personnel take the position that "particle" contamination PCEs are due to failure by HP's contamination control program while only distributed contamination PCE can be poor worker practices.  Gives them an excuse for not working hard to correct behavior.  Does anyone make this distinction or have in place some specific definitions?  

Thanks in advance,   Eric

Eric M. Goldin, CHP
Southern California Edison, San Onofre
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