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Related Experiment Videos

Implementation of a source term control program in a mature boiling water reactor.

G J Vargo1, A J Jarvis, J F Remark

  • 1New York Power Authority, Lycoming 13093.

Health Physics
|June 1, 1991
PubMed
Summary

Hydrogen water chemistry and zinc addition in boiling water reactors reduced corrosion product buildup but caused unexpected transport and 65Zn production. This study details the first combined application at the James A. FitzPatrick Nuclear Power Plant.

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Area of Science:

  • Nuclear Engineering
  • Radiological Chemistry
  • Materials Science in Nuclear Power

Background:

  • James A. FitzPatrick Nuclear Power Plant (JAF), a mature boiling water reactor (BWR), has operated since 1975.
  • A chemical decontamination of reactor water recirculation piping occurred during the 1988 refueling outage.
  • This outage marked the initiation of a source term control program.

Purpose of the Study:

  • To discuss the implementation and results of a source term control program at JAF.
  • To detail the radiological benefits and impacts of combined hydrogen water chemistry (HWC) and feedwater zinc (Zn) addition.
  • To evaluate the first-time application of both HWC and feedwater Zn addition in a BWR facility.

Main Methods:

  • Implementation of hydrogen water chemistry (HWC) post-decontamination.

Related Experiment Videos

  • Addition of zinc (Zn) to the feedwater.
  • Monitoring of corrosion product transport and activation during Cycle 9.

    • Main Results:

    • HWC implementation led to greater-than-anticipated transport of corrosion products within the reactor coolant system.
    • Feedwater Zn addition showed effectiveness in controlling the buildup of activated corrosion products like Cobalt-60 (60Co) on recirculation piping.
    • A significant adverse impact was the production of Zinc-65 (65Zn), released during outages and operational transients.

    Conclusions:

    • The combined operation of HWC and feedwater Zn addition at JAF yielded mixed results.
    • While Zn addition helped control 60Co buildup, the generation of 65Zn presents a notable challenge.
    • Further research is needed to optimize these strategies for BWR source term control.