I would argue that it's similar to how things are in the navy. You have an enlisted guy who goes up through the ranks and all the quals, eventually making it to their SIR qual (similar to going NLO to RO), and the to PPWS/EWS (up to SRO). Then you have the guy straight out of college who goes straight to PPWO/EOOW (direct SRO), but is still expected to have the same plant knowledge as everybody else combined, but no real operational experience. The only way for me, as an enlisted, to go direct RO, is to be previously qualified SIR.
There is no EWS/PPWS equivalent really in Commercial. Technically, all the NLOs report to the RO. The RO briefs jobs, evolutions, directs NLO actions, valve manipulations, etc. All the while he/she is watching the Reactor Power meter and "minding his/her panel". Take some of the EOOW responsibility and give it to the RO. Take the EWS, give it to the RO. You then have a closer comparison to Navy RO and Commercial Control Room Operator (CRO). Take the Throttleman and Electrical Operator out and place a 2nd CRO (bathroom breaks, other control room functions, etc) in the Control Room.
So what does the SRO do then if the two CROs are running around the Control Room giving orders? Similar to EOOW oversight but also EDO and SDO duties in port (since there's always some maintenance going on to have tagouts approved, work approved, etc). Who decides if the work is compatible with plant conditions? Take some of what your Engineering Officer and/or Prototype Shift Engineer do and give that to the SRO.
What happens when the SRO comes up against a "RPM Requirement"? There is no asking the squadron, type commander, KAPL, NR, etc for technical deviation. If you don't meet a Technical Specification (see other threads on that ominous subject), and the requirement is to shutdown/cooldown...then guess what: you shutdown/cooldown. Who is responsible for that decision? The person holding the SRO License on watch ultimately. Violate the rules and who gets in trouble? No...not your "commanding officer".
Oh, and yes, the SRO can sit as the CRO if needed. Part of the SRO qualification is also CRO qualification.
There are some very interesting and noteworthy differences that in my opinion we former NNPP guys/gals do not adequately articulate on this Forum for the Navy:Getting Out threads. However, debating commercial regulations is somewhat of a "red herring". It is what it is. However, note that some utilities do NOT (I repeat) do NOT hire Instant SROs! Likewise, if allowed, some would use the direct RO allowance, and maybe others would not. So, regardless of the regulation at hand...MMM is absolutely correct: it comes down to the individual and the plant...not the "sea lawyering" of what we think is logical in the CFRs and NUREGs.
Co60