NukeWorker Forum

Reference, Questions and Help => Nuke Q&A => Lessons Learned => Topic started by: h1234 on Dec 01, 2006, 06:16

Title: Sites that DON'T roll their DG
Post by: h1234 on Dec 01, 2006, 06:16

Sites that DON'T roll their DG before starting the diesel engine.

Info requested:

Site Names

Since when did your site stop rolling the DG?

Why did the site stop rolling the DG?

Thx,

H

Title: Re: Sites that DON'T roll their DG
Post by: h1234 on Dec 05, 2006, 04:56

Some clarification:

DG (Diesel Generator) roll :  barring or rotating the diesel engine one complete rotation to make sure that no oil/fuel/water is in any of the cylinder prior to starting one up.

I am told that these sites DO NOT roll its DGs for a Normal DG start.
Braidwood
Byron
Diablo Canyon
Robinson
Seabrook


Any other sites?

H

Title: Re: Sites that DON'T roll their DG
Post by: Roll Tide on Dec 10, 2006, 07:20

I suppose someone is waiting for one of the more vocal resident OPS guys to answer this. Broadzilla, M1Ark, and yours truly fall into that category. But we have already discussed this in person or via second-party e-mails with "H1234".

So who else can shed some light on the subject. Generally, the question is about barring the EDG before a routine start.

Thanks

Title: Re: Sites that DON'T roll their DG
Post by: shayne on Dec 10, 2006, 12:09

At Fermi, I don't remember barring them before start, but always hand bar them after shutdown.

Title: Re: Sites that DON'T roll their DG
Post by: NucEng for Hire on Dec 10, 2006, 10:11

At River Bend, 2 shaft revolutions prior to routine start, so rule that one out.

Title: Re: Sites that DON'T roll their DG
Post by: JohnK87 on Dec 11, 2006, 05:06

PI has Fairbanks-Morse diesels on Unit 1 and SACM diesels on Unit 2.  We haven't rolled them prior to start in the time I've been here.  We do air roll the F-M diesels after the run to make sure the oil is drained out.  We have modified our shutdown lube oil system so the oil can't get all the way up into the cylinders and fill them up.

Title: Re: Sites that DON'T roll their DG
Post by: h1234 on Dec 20, 2006, 09:31

PI.....what is the abbreviation stand for?

Title: Re: Sites that DON'T roll their DG
Post by: Rennhack on Dec 20, 2006, 10:07

Quote from: h1234 on Dec 20, 2006, 09:31

PI.....what is the abbreviation stand for?

Prairie Island in MN