Вплив дозування цинку на потужність дози від петель першого контуру для енергоблоків PWR і прогнозні оцінки для ВВЕР-1000
The paper analyzed the advisability of zinc injection into the VVER primary system coolant in order to minimize radioactive fields of equipment. In the western NPPs with PWR, zinc injection into the coolant leads to permanent decrease of dose rates caused by radioactive cobalt. Zinc is introduced in...
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| Date: | 2017 |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
State Scientific and Technical Center for Nuclear and Radiation Safety
2017
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| Online Access: | https://nuclear-journal.com/index.php/journal/article/view/134 |
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| Journal Title: | Nuclear and Radiation Safety |
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Nuclear and Radiation Safety| Summary: | The paper analyzed the advisability of zinc injection into the VVER primary system coolant in order to minimize radioactive fields of equipment. In the western NPPs with PWR, zinc injection into the coolant leads to permanent decrease of dose rates caused by radioactive cobalt. Zinc is introduced into the oxide film on the primary system equipment surfaces to form the most stable zinc spinel, which prevents the further introduction of radioactive cobalt in the oxide film. Predictive assessments for VVER-1000 show that under the zinc concentration of µg/dm3 in the coolant, cation vacancies in the spinel lattice will be occupied mostly by zinc, preventing the penetration of cobalt in the spinel and increase of radioactive fields of equipment. |
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