Chemical Neutralization to Control Denting in Nuclear Steam Generators

[+] Author and Article Information
T. A. Beineke, J. F. Hall, K. E. Marugg, D. B. Scott, R. M. Orsulak, E. E. Grondahl, E. J. Silva, G. C. Fink

Combustion Engineering, Inc., Materials and Chemistry Department, Windsor, Conn. 06095

J. Eng. Power 105(4), 763-770 (Oct 01, 1983) (8 pages) doi:10.1115/1.3227479 History: Received July 27, 1982; Online September 28, 2009


Laboratory testing at Combustion Engineering has indicated promise in controlling simulated steam generator tube denting through chemical neutralization. Testing was limited to on-line treatment, and two neutralizers have been evaluated: (i) calcium hydroxide, and (ii) boric acid. On-line treatment with calcium hydroxide successfully halted active denting whenever the bulk calcium concentration (in ppm) equaled or exceeded the bulk chloride concentration (in ppm). Calcium hydroxide also was effective as an alternative to ammonia as a pH controlling agent in two tests conducted without ingress of chloride. On-line treatment with boric acid consisted of a four-day soak at simulated low (approximately 30 percent) power with 50 ppm B followed by one month full-power operation with 10 ppm B. This treatment also halted denting. Nondestructive and destructive examination of test boilers gave no indication of adverse side effects associated with either neutralizer.

Copyright © 1983 by ASME
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In