Preliminary Aging Assessment of Nuclear Air-Treatment and Cooling System Fans
Winegardner,, W. K.
United States. Department of Energy.
Pacific Northwest National Laboratory (U.S.)
1995-07-01
English
A preliminary aging assessment of the fans used in nuclear air treatment and cooling systems was performed by the Pacific Northwest Laboratory as part of the U.S. Nuclear Regulatory Commission's Nuclear Plant Aging Research Program. Details from guides and standards for the design, testing, and installation of fans; results of failure surveys; and information concerning stressors, related aging mechanisms, and inspection, surveillance, and monitoring methods (ISMM) were compiled. Failure surveys suggest that about half of the failures reported for fans are primarily associated with aging. Aging mechanisms associated with the various fan components and resulting from mechanical, thermal, and environmental stressors include wear, fatigue, corrosion, and erosion of metals and the deterioration of belts and lubricants. A bearing is the component most frequently linked to fan failure. The assessment also suggests that ISMM that will detect irregularities arising from improper lubrication, cooling, alignment, and balance of the various components should aid in counteracting many of the aging effects that could impair fan performance. An expanded program, to define and evaluate the adequacy of current ISMM and maintenance practices and to include a documented Phase I aging assessment, is recommended.
42 Engineering
Report
Text
rep-no: PNL-10617
grantno: DE-AC06-76RL0 1830
doi: 10.2172/1105003
osti: 1105003
https://digital.library.unt.edu/ark:/67531/metadc866160/
ark: ark:/67531/metadc866160