Plant maintenance and aging management: Are they the same? Page: 1 of 11
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
50 OT 5/
PLANT MAINTENANCE AND AGING MANAGEMENT: ARE THEY THE SAME?*
Robert J. Lofaro
Department of Advanced Technology
Brookhaven National Laboratory
Upton, New York
As part of the NRC's Nuclear Plant Aging Research Program, a
number of aging studies were performed on safety-related systems
and components which found that, even with current maintenance
and monitoring practices in place, a large number of the reported
failures are related to aging. This suggests that current practices
are not sufficient to completely manage aging degradation, and
other factors need to be considered. This paper examines the
aging management process and the degree to which maintenance
plays a part in it. Component failures and degradation
mechanisms identified in aging studies of several different safety
systems are summarized and evaluated, then correlated with the
components most frequently failed. This information, along with
an analysis of failure causes, is then used to determine the extent
to which aging is managed by current maintenance practices.
Conclusions and recommendations for proper aging management
are also presented.
Aging of nuclear power plants has been of concern to the U.S.
Nuclear Regulatory Commission (NRC) for more than a decade
and, as a result, a significant amount of research has been
performed in this area. This research has provided a solid
technical basis for understanding the aging process and its effects,
as well as identifying ways of mitigating it. While great strides
have been made by the nuclear industry to better understand and
manage aging degradation in recent years, a common belief that
still exists is that a good preventive maintenance program is all
that is needed to properly manage aging. It is also believed that
since all plants have maintenance programs in place, no additional
effort is needed to address the aging issue.
This paper examines the question of whether a plant maintenance
program and an aging management program are really the same.
Specifically, it examines what maintenance practices are currently
performed for various components and how they are established,
and compares this to the requirements of an aging management
program. Results from several aging studies are presented and
discussed to address the effectiveness of current maintenance
practices at managing aging degradation.
SAMPLE RESULTS FROM AGING STUDIES
In light of the concern over aging degradation in nuclear plants
and its potential effect on plant safety, the NRC instituted the
Nuclear Plant Aging Research (NPAR) Program. As part of this
research program, a significant number of aging studies were
performed on safety-related components and systems to provide
the information needed to better understand the characteristics and
implications of the aging process. These studies were typically
performed in two phases; the first phase would determine if aging
was a concern for that system or component, and the second
phase, if needed, would investigate methods of detecting and
mitigating it. The objectives of the program and the components
and systems selected for study are described in detail by Vora
*This paper based on work performed underthe auspices of the U.S. Nucku Regulatory Commission.
DISTRIBUTION CF THIS DOCUMENT 1S UNLMiTFqj M
Here’s what’s next.
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Lofaro, R.J. Plant maintenance and aging management: Are they the same?, article, June 1, 1995; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc793384/m1/1/: accessed April 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.