The Decomposition of Light and Heavy Water Boric Acid Solutions by Cp-3' Pile Radiations

Hart, Edwin J.; McDonell, W.R.; Gordon, S.

doi:10.2172/4370404

Cited by 5 publications

(10 citation statements)

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“…Decomposition will still occur even in the presence of additives but they serve to alter the net outcome by affecting the chemical reactions such that one process becomes more dominat. This was seen somewhat in Figure 2 and is shown more explicitly in Figure 3 [ 26 ] which shows that the equilibrium point or threshold for which beyond negative effects manifest can be increased through bolstering the scavenging capacity and altering the balance such that the favorable processes are dominant.…”

Section: Parallels Between Radiation Chemistry Of Water and Radiobiologmentioning

confidence: 99%

“…Manifestation of negative systematic effects is reflected by the amount of water decomposition from radiolysis as reflected by H 2 gas generation rates measured in micro-molar concentrations per minute on the ordinate. Figure illustrates that the addition of dissolved H 2 increases the scavenging capacity of the water therefore increasing the threshold and delaying the onset of when decomposition becomes the dominant process [ 26 ].…”

Section: Parallels Between Radiation Chemistry Of Water and Radiobiologmentioning

confidence: 99%

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A hypothesis on biological protection from space radiation through the use of new therapeutic gases as medical counter measures

et al. 2012

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Radiation exposure to astronauts could be a significant obstacle for long duration manned space exploration because of current uncertainties regarding the extent of biological effects. Furthermore, concepts for protective shielding also pose a technically challenging issue due to the nature of cosmic radiation and current mass and power constraints with modern exploration technology. The concern regarding exposure to cosmic radiation is biological damage that is associated with increased oxidative stress. It is therefore important and would be enabling to mitigate and/or prevent oxidative stress prior to the development of clinical symptoms and disease. This paper hypothesizes a "systems biology" approach in which a combination of chemical and biological mitigation techniques are used conjunctively. It proposes using new, therapeutic, medical gases as chemical radioprotectors for radical scavenging and as biological signaling molecules for management of the body's response to exposure. From reviewing radiochemistry of water, biological effects of CO, H2, NO, and H2S gas, and mechanisms of radiation biology, it can be concluded that this approach may have therapeutic potential for radiation exposure. Furthermore, it also appears to have similar potential for curtailing the pathogenesis of other diseases in which oxidative stress has been implicated including cardiovascular disease, cancer, chronic inflammatory disease, hypertension, ischemia/reperfusion (IR) injury, acute respiratory distress syndrome, Parkinson's and Alzheimer's disease, cataracts, and aging. We envision applying these therapies through inhalation of gas mixtures or ingestion of water with dissolved gases.

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Section: Parallels Between Radiation Chemistry Of Water and Radiobiologmentioning

confidence: 99%

Section: Parallels Between Radiation Chemistry Of Water and Radiobiologmentioning

confidence: 99%

A hypothesis on biological protection from space radiation through the use of new therapeutic gases as medical counter measures

et al. 2012

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“…These pumping demands are less than the demands made on the system for maintaining reactor control. 1.33 Flow and Pressure Drop. Based upon an equivalent 250 ft of 3/4-in.-od x 0.065-in.-wall, seamless, stainless steel tubing and a pumping rate of 10 gal/min, the total head loss is calculated to be 430 ft.…”

Section: Parameter Studiesmentioning

confidence: 99%

“…A quantitative estimate of the rate of gas generation under the in-pile conditions was necessary in order to design the off-gas system to remove this explosive hazard. Since the literature contains references [1,2,3] to this radiolytic gas generation only at low boric acid concentrations and low neutron fluxes it was deemed necessary to determine the gas generation rate under conditions similar to those anticipated in the in-pile control and corrosion test loops. Accordingly, capsule experiments were performed in the hydraulic rabbit facility of the MTR [4], showing a production rate of The design objectives of the off-gas system ( Figure 13) are:…”

Section: Heat Transfermentioning

confidence: 99%

The Design of a Dynamic Corrosion and Chemical Control Test Loop and Preliminary Out-of-Pile Test Results

Zelezny¹

1963

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This report was prepared as an account of Government sponsored work. Neither the United States, nor the Commission, nor any person acting on behalf of the Commission:A. Makes any warranty or representation, express or implied, with respect to the accuracy, completeness, or usefulness of the information contained in this report, or that the use of any information, apparatus, method, or process disclosed in this report may not infringe privately owned rights; or B. Assumes any liabilities with respect to the use of, or for damages resulting from the use of any information, apparatus, method, or process disclosed in this report.As used in the above, "person acting on behalf of the Commission" includes any employee or contractor of the Commission, or employee of such contractor, to the extent that such employee or contractor of the Commission, or employee of such contractor prepares, disseminates, or provides access to, any information pursuant to his employment or contract with the Commission, or his employment with such contractor.Printed in USA ADDENDUM FOR IDO -16812 NOTE ON RESUMPTION OF PROJECTThe AEC has indicated that it anticipates that funds, for lack of which the project had to be interrupted, will be available for resumption of activities on a limited basis in FY 6L and on an extended scale in FY 65. TEST LOOP AND PRELIMINARY OUT-OF-PILE TEST RESULTS ABSTRACTA project having the objective of developing and demonstrating in actual operation a system for the chemical control of nuclear reactors has been carried to partial completion and now is temporarily discontinued because of interruption of funds. The design developed by this project embodies a circulating loop in the E TR, replacing one of the conventional mechanical control rods. Control of the reactor is to be effected by varying the concentration of a boric acid solution circulating through the loop. A second objective of the project is the performance of long-term corrosion tests on boric acid-aluminum alloy combinations. At the time of interruption the design was complete and 80% of the necessary components had been purchased. These components are being held in readiness, pending resumption of the project.This report describes the overall loop design and the means by which this design was developed. These include critical facility measurements, analog computer calculations, hydraulic and heat transfer computations, and the construction and operation of an out-of-pile mock-up loop to determine the dynamic characteristics of the loop.iii

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“…One school of thought suggests that the amount of water in the thermosyphons is small resulting in a small path length and prompt recombination, yielding a minimal amount of gas formation (Ref. 3). Another thought suggests that the distribution of fluid and vapor within the operating thermosyphons inhibits recombination, making gas formation from the working fluid in the thermosyphons likely (Ref.…”

Section: Introductionmentioning

confidence: 99%

Titanium-Water Thermosyphon Gamma Radiation Exposure and Results

Sanzi

Jaworske

Goodenow

2012

10th International Energy Conversion Engineering Conference

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The Decomposition of Light and Heavy Water Boric Acid Solutions by Cp-3' Pile Radiations

Cited by 5 publications

References 0 publications

A hypothesis on biological protection from space radiation through the use of new therapeutic gases as medical counter measures

A hypothesis on biological protection from space radiation through the use of new therapeutic gases as medical counter measures

The Design of a Dynamic Corrosion and Chemical Control Test Loop and Preliminary Out-of-Pile Test Results

Titanium-Water Thermosyphon Gamma Radiation Exposure and Results

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