Iodine evolution and pH control [electronic resource]
pH is the major factor in determining the extent of I₂ in solution. In containment where no pH-control chemicals are present, the acidity or basicity of the water pool will be determined by materials that are introduced into containment as a result of the accident itself. These materials may be fiss...
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Online Access |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
U.S. Nuclear Regulatory Commission ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1993.
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| Subjects: |
MARC
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| 245 | 0 | 0 | |a Iodine evolution and pH control |h [electronic resource] |
| 260 | |a Washington, D.C. : |b U.S. Nuclear Regulatory Commission ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, |c 1993. | ||
| 300 | |a 4 p. : |b digital, PDF file. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a computer |b c |2 rdamedia. | ||
| 338 | |a online resource |b cr |2 rdacarrier. | ||
| 500 | |a Published through the Information Bridge: DOE Scientific and Technical Information. | ||
| 500 | |a 10/01/1993. | ||
| 500 | |a "conf-931160--21" | ||
| 500 | |a "DE94000471" | ||
| 500 | |a American Nuclear Society (ANS) winter meeting,San Francisco, CA (United States),14-18 Nov 1993. | ||
| 500 | |a Weber, C.F.; Lorenz, R.A.; Beahm, E.C. | ||
| 520 | 3 | |a pH is the major factor in determining the extent of I₂ in solution. In containment where no pH-control chemicals are present, the acidity or basicity of the water pool will be determined by materials that are introduced into containment as a result of the accident itself. These materials may be fission products (i.e., cesium compounds), thermally produced products (i.e., core-concrete aerosols), or compounds produced by radiation (i.e., nitric acid). In situations where pH levels fall below ∼7, the formation of I₂ will occur in irradiated iodide solutions. A correlation between pH and iodine formation is needed so that the amounts I₂ in water pools can be assessed. This, in turn, determines the amount of I₂ in the atmosphere available for escape by containment leakage. A number of calculational routines based on more than 100 differential equations representing individual reactions can be found in the literature. In this work, it is shown that a simpler approach based on the steady-state decomposition of hydrogen peroxide should correctly describe iodine formation in severe accidents. Comparisons with test data show this approach to be valid. The most important acids in containment will be nitric acid (HNO₃), produced by irradiation of water and air, and hydrochloric acid (HCl), produced by irradiation or heating of electrical cable insulation. The most important bases in containment will be cesium hydroxide, cesium borate (or cesium carbonate), and in some plants pH additives, such as sodium hydroxide or sodium phosphate. | |
| 536 | |b AC05-84OR21400. | ||
| 650 | 7 | |a Hydrogen Peroxide. |2 local. | |
| 650 | 7 | |a Reactor Safety. |2 local. | |
| 650 | 7 | |a Boron Compounds. |2 local. | |
| 650 | 7 | |a Quantitative Chemical Analysis. |2 local. | |
| 650 | 7 | |a Ph Value. |2 local. | |
| 650 | 7 | |a Decomposition. |2 local. | |
| 650 | 7 | |a Physical Radiation Effects. |2 local. | |
| 650 | 7 | |a Nuclear Power Plants. |2 local. | |
| 650 | 7 | |a Coolants. |2 local. | |
| 650 | 7 | |a Cesium Carbonates. |2 local. | |
| 650 | 7 | |a Containment. |2 local. | |
| 650 | 7 | |a Aqueous Solutions. |2 local. | |
| 650 | 7 | |a Hydrochloric Acid. |2 local. | |
| 650 | 7 | |a Reactor Cooling Systems. |2 local. | |
| 650 | 7 | |a Nitric Acid. |2 local. | |
| 650 | 7 | |a Iodine. |2 local. | |
| 650 | 7 | |a Cesium Hydroxides. |2 local. | |
| 650 | 7 | |a Reactor Accidents. |2 local. | |
| 650 | 7 | |a Fission Products. |2 local. | |
| 650 | 7 | |a General Studies Of Nuclear Reactors. |2 edbsc. | |
| 710 | 2 | |a Oak Ridge National Laboratory. |4 res. | |
| 710 | 2 | |a U.S. Nuclear Regulatory Commission. |4 spn. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
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