INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Use and application of ANSI/ANS 51.1 and 58.14

Use and application of ANSI/ANS 51.1 and 58.14

(OP)
I have a question regarding use and application of ANSI standards. If the components, systems of structures are classified in accordance with ANSI/ANS 18.2 1973 »Nuclear Safety Criteria For The Design Of Stationary PWRs«, and this standard is referenced in USAR, are you allowed to use ANSI/ANS 58.14 »Safety and Pressure Integrity Classification Criteria for Light Water Reactors«. Are you allowed to declassify some parts of systems for minor modifications? ANSI/ANS 58.14 is currently not referenced in USAR. My second question is, what is the correlation between ANSI/ANS 18.2 and ANSI/ANS 51.1 »Nuclear Safety Criteria for the Design of Stationary Pressurized Water Reactor Plants«? In foreword of ANSI/ANS 51.1 is stated that is complete revision of ANSI/ANS 18.2. In this case are you allowed to apply this standard instead of ANSI/ANS 18.2, which is referenced in USAR.

RE: Use and application of ANSI/ANS 51.1 and 58.14

Once declassified, it would be nearly impossible to return the component to its current (original) certification.

RE: Use and application of ANSI/ANS 51.1 and 58.14

In regards to your 51.1 question, in my experiences, we could not justify the use of an alternate standard, even if superseding an original, without a licensing amendment. Doing so would be the equivalent to committing to an earlier code year/addenda in your USAR, and then trying to invoke a later code year in design/operation. Your experience may differ.

RE: Use and application of ANSI/ANS 51.1 and 58.14

(OP)
If the plant is licensed in accordance with ANSI/ANS 18.2, and ANSI/ANS 51.1 is complete revision of 18.2, it is not allowed to use it without a licensing amendment. Therefor application of ANSI/ANS 58.14 standard which has no direct link to ANSI/ANS 18.2 is not permitted. Is my thinking OK?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close