Radiolysis of 4.5 mol dm−3 LiOH with 6Li(n, α)3H ion recoil

Elliot, A. John; Chenier, Monique P.

doi:10.1016/0022-3115(92)90502-c

Cited by 11 publications

(18 citation statements)

References 15 publications

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“…When the configuration of the cementitious medium is poorly defined, this unfortunately contributes to diminish the predictive character of the model, both with respect to the time of the equilibrium appearance and with respect to the final state of the system. As a matter of fact, with respect to the initial conditions combination, steady state of the radiolysis proceeds either from a law of mass action on the reactions system in solution, either from the specific activation of the chain reaction (5)- (22), or whether from the mineralogical control of the pore solution by CaO 2 AE 8H 2 O. About this last point, involvement of the calcium peroxide in the O 2 disappearance [1] seems indeed as an erroneous hypothesis because the existence of this phase is obligatory associated to the presence of oxygenated species.…”

Section: Discussionmentioning

confidence: 99%

“…The list, nonstandard, is principally based on the critical review of Elliot [14], completed by twenty or so contributions [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Within this comprehensive list, some crossed reactions or feed-back reactions hold the attention in consideration of their regulating role towards radiolysis.…”

Section: Reactionsmentioning

confidence: 99%

See 1 more Smart Citation

A comprehensive model to describe radiolytic processes in cement medium

Bouniol

Bjergbakke

2008

Journal of Nuclear Materials

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Section: Discussionmentioning

confidence: 99%

Section: Reactionsmentioning

confidence: 99%

A comprehensive model to describe radiolytic processes in cement medium

Bouniol

Bjergbakke

2008

Journal of Nuclear Materials

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“…Models employing the yields from the fast stage of water radiolysis and appropriate chemical reactions are straightforward to develop because the kinetics is homogeneous. , However, even small errors in the input parameters can lead to incorrect predicted yields after extrapolating to long periods of time. Experimental yields for only a few of the radicals and molecular species escaping the tracks of heavy ions are known, so it is difficult to determine the accuracy of any model of the long-time radiation chemistry of water with heavy ions. , Selected experiments that examine the chemistry of water radiolysis in the time domain beyond a few microseconds can greatly aid the development of track models for understanding water radiolysis and for application to practical situations.…”

Section: Introductionmentioning

confidence: 99%

Effect of Molecular Hydrogen on Hydrogen Peroxide in Water Radiolysis

2001

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The long-time chemistry occurring in the radiolysis of water with different types of radiation has been examined. Radiolytic processes were probed by determining the influence of added molecular hydrogen on the formation of hydrogen peroxide in the radiolysis of water with γ rays, 2 and 10 MeV protons, and 5 MeV helium ions. Homogeneous model calculations were used to obtain quantitative information about the yields of radicals and molecular products escaping the heavy ion tracks. The results show that the yields of radicals escaping from the tracks of 10 MeV protons is significant, whereas the corresponding yields with 2 MeV protons and 5 MeV alpha particles are much lower. The addition of molecular hydrogen has a negligible effect on the formation or consumption of hydrogen peroxide in the radiolysis of water using heavy ions with a high linear energy transfer rate, LET. This result is contrary to the predictions of a homogeneous model and suggests that the long-time chemistry of water is not well-known or that a homogeneous model cannot be applied to high LET radiation. There is also the possibility that a significant yield of an oxidizing species is produced at high LET.

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“…Reaction (25) which is the predominant reaction above pH 12 is slower than reaction (23) or (24) because of the charge repulsion so that H 2 O 2 formation does not occur faster than at neutrality. Since hydroxyl radical formation with the neutral set is promoted less than with the alkaline set, the results obtained by the neutral set give more a conservative evaluation for the alkaline effect on the radiolysis of water.…”

Section: 5mentioning

confidence: 99%

Mitigation Effect of Alkaline Water Chemistry upon Intergranular Stress Corrosion Cracking of Sensitized 304 Stainless Steel.

Wada

Tachibana

Uetake

et al. 2001

J. Nucl. Sci. Technol.

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Alkaline water chemistry (AWC) has been studied as a new water chemistry control to mitigate intergranular stress corrosion cracking (IGSCC) of sensitized type 304 stainless steel (SUS304). The AWC was found to be capable of reducing crack growth rates (CGRs) of the IGSCC. At first, the direct effect of AWC upon IGSCC was studied experimentally. The 1/4T compact tension specimen was used for measurement of CGRs of the SUS304 in high temperature and high purity water. Crack length was monitored by a reversing direct current potential drop method. The CGR of SUS304 at 400 ppb O 2 concentration was reduced ten-fold when solution pH was increased to 9. During this time, electrochemical corrosion potential (ECP) of the specimen did not change so much. Second, it was predicted by a radiolysis calculation that the AWC would reduce H 2 O 2 concentration under the hydrogen water chemistry (HWC). Since the H 2 O 2 concentration was more effectively suppressed by AWC, the required hydrogen concentration in feedwater to lessen the ECP of the reactor components was lower in AWC than at neutrality. Therefore, an indirect effect, that is moderation of the corrosive environment, could also be expected in addition to the direct moderation effect under HWC condition.

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Radiolysis of 4.5 mol dm−3 LiOH with 6Li(n, α)3H ion recoil

Cited by 11 publications

References 15 publications

A comprehensive model to describe radiolytic processes in cement medium

A comprehensive model to describe radiolytic processes in cement medium

Effect of Molecular Hydrogen on Hydrogen Peroxide in Water Radiolysis

Mitigation Effect of Alkaline Water Chemistry upon Intergranular Stress Corrosion Cracking of Sensitized 304 Stainless Steel.

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