Radiation Buildup on Stainless Steel in a Boiling Water Reactor Environment

Honda, Takashi; Izumiya, Masakiyo; Minato, Atsushi; Ohsumi, Katsumi; Matsubayashi, Hideo

doi:10.13182/nt84-a33325

Cited by 28 publications

(19 citation statements)

References 7 publications

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“…However, concerning the deposition behavior, it was reported that SUS304 and SUS316L did not show significant difference to each other. 6) For this reason, the difference in test piece materials is neglected in this paper, when we compare the deposition behaviors in each experiment. As can be seen in Table 1, there is quite a large difference in the level of Co-60 activity between the two experiments.…”

Section: Reference Experiments For Comparisonmentioning

confidence: 99%

Effects of Hydrogen Peroxide on Cobalt Deposition Rate on Primary Cooling System of Boiling Water Reactors

Usui

Fuse

Hosokawa

et al. 2008

J. Nucl. Sci. Technol.

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Experimental data of radioactivity deposition rates on stainless steel specimens exposed to high-temperature water including hydrogen peroxide (H 2 O 2 ) and oxygen (O 2 ) were applied to the evaluation of Co-60 accumulation rates in oxide films on the stainless steel piping of a boiling water reactor (BWR) primary cooling system and then an empirical formula of Co-60 deposition rate coefficient was proposed as a function of exposure time. The empirical formula was applied to the evaluation of the amount of Co-60 deposition on the stainless steel piping of BWR primary cooling systems under normal water chemistry (NWC) and hydrogen water chemistry (HWC) conditions. The results are summarized as follows. 1) The Co-60 deposition rate coefficient was almost independent of2) The proposed empirical formula determined on the basis of experiments under H 2 O 2 conditions could give a much better estimation of the Co-60 deposition rate coefficient on stainless steel under NWC conditions of BWR than the previous formula based on the data under simple O 2 conditions.3) The deposition amounts of Co-60 on stainless steel piping under HWC conditions were evaluated using the formula, which suggested that those without any prefilming treatment were several times as high as those under NWC conditions. 4) The increase in Co-60 deposition under HWC conditions was caused by the less protective film in mitigating Co-60 deposition and it could be avoided by several hundred hours of operation under NWC conditions prior to HWC operation. The effect on material integrity is evaluated to be negligible.

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Section: Reference Experiments For Comparisonmentioning

confidence: 99%

Effects of Hydrogen Peroxide on Cobalt Deposition Rate on Primary Cooling System of Boiling Water Reactors

Usui

Fuse

Hosokawa

et al. 2008

J. Nucl. Sci. Technol.

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“…The hematite suspension obtained by this method contains considerable amounts of chloride ions. For purification the suspension was retained in dialyse membrane tubing (Spectra/Por 2 Membrane, MWCO 12-14,000), which was bathed in 0.1 mM HNO 3 . By this method the hematite sol was kept at pH 4, and aggregation and sedimentation were avoided.…”

Section: Reagents and Reagent Preparationmentioning

confidence: 99%

“…Assuming a particle density of 5.2 g/cm 3 (10), this corresponds to a volume fraction of about 0.5%. The suspension was acidified to pH 3.5 by the addition of HNO 3 and put in an ultrasonic bath for 10 min.…”

Section: Electroacoustic Measurementsmentioning

confidence: 99%

“…The surface properties of oxides are also very important for the understanding of different mechanisms of metal corrosion. In a recent paper (1), we studied the sorption of cobalt(II) on hematite (α-Fe 2 O 3 ) because of its relevance in the nuclear power industry (2,3). Apart from its practical applications, hematite is very suitable for fundamental studies of surface charging properties and the sorption of ions from the liquid phase since it is relatively simple to prepare on a lab scale and has high sorption capacity.…”

Section: Introductionmentioning

confidence: 99%

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Electroacoustic and Potentiometric Studies of the Hematite/Water Interface

Gunnarsson

Rasmusson

Wall

et al. 2001

Journal of Colloid and Interface Science

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“…The expensive depleted Zinc Acetate dehydrate is injected into the pressurized water reactor (PWR) primary coolant as a substitution of the natural Zn. Aluminum (Al) addition may also alleviate the corrosion of the austenitic SS while the natural Al isotopes will not result in the radiation field build-up in the boiling water reactor (BWR) primary coolant [5,6]. However, data is very few about the effects of Al addition on the corrosion behavior of the austenitic SS in the high temperature and high pressure water environment.…”

Section: Introductionmentioning

confidence: 99%

Effects of Aluminum Addition on the Corrosion of 316 Stainless Steel in the Simulated Primary Circuit Water of PWR

Song¹,

Khalil²,

Zhang³

et al. 2017

dteees

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Abstract. The effect of Al addition on the corrosion of 316 SS exposed to simulated primary circuit of PWR has been investigated by potentiodynamic polarization, Mott-Schottky plots and corrosion kinetics. After Al addition, the weight loss of 316 SS was reduced, the semiconductor properties of the oxide film formed on the surface on 316 SS were optimized. The kinetic study indicates that corrosion process is well fitted by the pseudo-first order model. The presence of Al increases the corrosion activation energy resulting in the slowdown of the corrosion of 316 SS. Al additions may impedes the transport of the metal ion in the micropore of the 316 SS. The research may give a good solution for material corrosion in the primary circuit water of PWR.

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Radiation Buildup on Stainless Steel in a Boiling Water Reactor Environment

Cited by 28 publications

References 7 publications

Effects of Hydrogen Peroxide on Cobalt Deposition Rate on Primary Cooling System of Boiling Water Reactors

Effects of Hydrogen Peroxide on Cobalt Deposition Rate on Primary Cooling System of Boiling Water Reactors

Electroacoustic and Potentiometric Studies of the Hematite/Water Interface

Effects of Aluminum Addition on the Corrosion of 316 Stainless Steel in the Simulated Primary Circuit Water of PWR

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