Help | Contact Us
NukeWorker.com
NukeWorker Menu Stellite Reduction

Author Topic: Stellite Reduction  (Read 10086 times)

0 Members and 1 Guest are viewing this topic.

Offline Roll Tide

  • Nearly SRO; Previous RCO / AUO / HP Tech / MM1ss
  • Very Heavy User
  • *****
  • Posts: 1876
  • Karma: 1447
  • Gender: Male
  • Those who wait upon God..rise up on eagles' wings
Stellite Reduction
« on: Sep 08, 2004, 11:54 »
I recently was briefed on a new program that sounds like an odd cross between FME, RADCON, and Chemistry. We are going to try to reduce loose stellite in new components in order to reduce the amount of Co-60 after activation.

I would love to have some anecdotal evidence for successes in this area. I haven't been able to pin anyone down to specifics, but "some other plants" have significantly reduced shutdown doserates.

Thanks!
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.
.....
And for the support of this Declaration, with a firm reliance on the protection of divine Providence, we mutually pledge to each other our Lives, our Fortunes and our sacred Honor.

Offline Roll Tide

  • Nearly SRO; Previous RCO / AUO / HP Tech / MM1ss
  • Very Heavy User
  • *****
  • Posts: 1876
  • Karma: 1447
  • Gender: Male
  • Those who wait upon God..rise up on eagles' wings
Re: Stellite Reduction
« Reply #1 on: Sep 13, 2004, 07:58 »
Let me clarify: I would like to hear the experiences of my fellow techs that have been involved with this, regardless of success or failure.
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.
.....
And for the support of this Declaration, with a firm reliance on the protection of divine Providence, we mutually pledge to each other our Lives, our Fortunes and our sacred Honor.

Offline Roll Tide

  • Nearly SRO; Previous RCO / AUO / HP Tech / MM1ss
  • Very Heavy User
  • *****
  • Posts: 1876
  • Karma: 1447
  • Gender: Male
  • Those who wait upon God..rise up on eagles' wings
Re: Stellite Reduction
« Reply #2 on: Dec 27, 2004, 05:31 »
Is this thing on??

 :( ::)
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.
.....
And for the support of this Declaration, with a firm reliance on the protection of divine Providence, we mutually pledge to each other our Lives, our Fortunes and our sacred Honor.

Offline MrHazmat

  • Principal Hazardous Material Specialist - DOE
  • Moderate User
  • ***
  • Posts: 186
  • Karma: 136
  • Gender: Male
  • DragRacing Ain't Nothing Like It!!!!!!
Re: Stellite Reduction
« Reply #3 on: Dec 28, 2004, 07:50 »
BREAKER BREAKER RT................You coming in loud and clear  ;)
Keeping our highways safe for over 40 years

garcma

  • Guest
Re: Stellite Reduction
« Reply #4 on: Dec 31, 2004, 02:52 »
I have to ask the obvious....what is stellite?

Offline Nuclear NASCAR

  • Electrician
  • Forum Administrator
  • *
  • Posts: 938
  • Karma: 3094
  • Gender: Male
  • Everyone needs a Harley. Mine's furry with 4 legs.
Re: Stellite Reduction
« Reply #5 on: Dec 31, 2004, 04:20 »
[n]  (trademark) a cobalt-base alloy with chromium and other metals; very hard; used to make cutting tools and for surfaces subject to heavy wear 

Chronic health effects specific to an element may be difficult to detect due to the numerous elements in this alloy. Chronic inhalation effects may include chronic obstructive lung disease, pulmonary fibrosis, rhinitis and/or bronchitis. Chronic occupational exposure to cobalt has been associated with polycythemia (an increase in the total cell mass of the blood), bloody urine, and goitre (enlargement of the thyroid gland).
"There is much pleasure to be gained from useless knowledge."

  -Bertrand Russell

Offline grantime

  • Heavy User
  • ****
  • Posts: 295
  • Karma: 468
  • Gender: Male
  • Retired Plant Health Physicist CHP, NRRPT
Re: Stellite Reduction
« Reply #6 on: Jan 22, 2005, 12:13 »
My plant is starting to look at this.  If we can reduce the amount of stellite in system we will reduce the amount of Co-60 formed.  We have already done the common things of trying to reduce the amount of stellite valve seats in the system.  The focus now will be on reducing the amount of Co that is loose on outside of new components as well as reducing any added to system from valve work.

What levels are you trying to get to?  Is it a ppm level or by weight?

We are currently looking at instrumentation.  Do you have any suggestions?  Some of what we are looking at is lab grade stuff.  Awfully expensive and not portable.  There are some portable allow type testers that may work. 

We are just starting to look at it here and I have more questions than answers. 

breath in, breath out, move on----j buffett

bjb

  • Guest
Re: Stellite Reduction
« Reply #7 on: Feb 12, 2005, 08:08 »
I think it is:
Stellite:
The build-up of crud and crap in the piping, valves and any other area of the reactor. Causes corrision and high activity rates.

Offline RDTroja

  • Site Heretic
  • Gold Member
  • *
  • Posts: 4015
  • Karma: 4558
  • Gender: Male
  • I knew I got into IT for a reason!
Re: Stellite Reduction
« Reply #8 on: Feb 16, 2005, 02:21 »
I think it is:
Stellite:
The build-up of crud and crap in the piping, valves and any other area of the reactor. Causes corrision and high activity rates.

Ummm... that is not a definition of stellite. See Nuclear Nascar's post above. Stelleite is a specific very hard cobalt alloy used in valve seats that gets loose in the RCS through corrosion and wear and then becomes activated. It is the major source of Cobalt-60 in the waste stream of a nuclear plant. Thus the high dose rates (two reasonably hard gammas per decay.)
« Last Edit: Feb 16, 2005, 02:23 by RDTroja »
"I won't eat anything that has intelligent life, but I'd gladly eat a network executive or a politician."

                                  -Marty Feldman

"Politics is supposed to be the second-oldest profession. I have come to understand that it bears a very close resemblance to the first."
                                  -Ronald Reagan

I have never made but one prayer to God, a very short one: 'O Lord, make my enemies ridiculous.' And God granted it.

                                  - Voltaire

 


NukeWorker ™ is a registered trademark of NukeWorker.com ™, LLC © 1996-2024 All rights reserved.
All material on this Web Site, including text, photographs, graphics, code and/or software, are protected by international copyright/trademark laws and treaties. Unauthorized use is not permitted. You may not modify, copy, reproduce, republish, upload, post, transmit or distribute, in any manner, the material on this web site or any portion of it. Doing so will result in severe civil and criminal penalties, and will be prosecuted to the maximum extent possible under the law.
Privacy Statement | Terms of Use | Code of Conduct | Spam Policy | Advertising Info | Contact Us | Forum Rules | Password Problem?