0
research-article

Formation of local, transient ?acid spikes? in the fast neutron radiolysis of supercritical water (SCW) at 400 ?C: A potential source of corrosion in SCW-cooled reactors?

[+] Author and Article Information
Md Mohsin Patwary

Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, QC J1H 5N4, Canada
md.mohsin.patwary@usherbrooke.ca

Sunuchakan Sanguanmith

Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, QC J1H 5N4, Canada
sunuchakan.sanguanmith@USherbrooke.ca

Jintana Meesungnoen

Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, QC J1H 5N4, Canada
jintana.meesungnoen@USherbrooke.ca

Jean-Paul Jay-Gerin

Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, QC J1H 5N4, Canada
jean-paul.jay-gerin@USherbrooke.ca

1Corresponding author.

ASME doi:10.1115/1.4044409 History: Received March 29, 2019; Revised July 26, 2019

Abstract

The use of supercritical water (SCW) in GEN IV reactors is a logical approach to the ongoing development of nuclear energy. A proper understanding of the radiation chemistry and reactivities of transients in a reactor core under SCW conditions is required to achieve optimal water chemistry control and safety. A Monte Carlo simulation study of the radiolysis of SCW at 400 °C by incident 2 MeV monoenergetic neutrons (taken as representative of a fast neutron flux in a reactor) was carried out as a function of water density between ~0.15-0.6 g/cm3. The in situ formation of H3O+ by the generated recoil protons was shown to render the "native" track regions temporarily very acidic (pH ~ 1). This acidity, though local and transitory ("acid spikes"), raises the question whether it may promote a corrosive environment under proposed SCW-cooled reactor operating conditions that would lead to progressive degradation of reactor components.

Copyright (c) 2019 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

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