مورد إلكتروني
Combining DCVD measurements at different alignments for enhanced partial defect detection performance
| العنوان: | Combining DCVD measurements at different alignments for enhanced partial defect detection performance |
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| بيانات النشر: | Uppsala universitet, Tillämpad kärnfysik 2021 |
| تفاصيل مُضافة: | Branger, Erik Elter, Zsolt Grape, Sophie Jansson, Peter Preston, Markus |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | In the current Digital Cherenkov Viewing Device (DCVD) measurement methodology, the DCVD is aligned over the centre of a fuel assembly when measuring emitted Cherenkov light. Due to the collimation of light, and due to the lifting handle of PWR fuel assemblies covering the fuel periphery, the DCVD is more sensitive to partial defects near the fuel assembly centre than near the periphery. Here, we investigate the sensitivity of the DCVD for detecting partial defects for different instrument alignments. By performing measurements at both the centre and near the assembly periphery, more accurate measurements near the periphery can be obtained. DCVD images were simulated for different partial defect scenarios with 30% of the fuel rods removed or replaced with low, medium or high-density rods. Simulations were run with different DCVD alignments, and the Cherenkov light distribution in the images were quantitatively analysed and compared to simulated images for a fuel assembly without defects. The simulation results were also compared with measurements of intact spent fuel assemblies. The simulations show that the local Cherenkov light intensity deviation due to a partial defect is not sensitive to the alignment. Hence, the current methodology is robust, and will not benefit from measuring at different alignments. Regarding the signal-to-noise ratio, combining measurements at different alignments can improve the measurements. However, the improvement is modest, and for the DCVD it may be preferred to simply use the current methodology and make longer measurements. For future autonomous Cherenkov measuring systems, combining images can be a way of improving the quality of the measurements. |
| مصطلحات الفهرس: | Nuclear fuel, partial defect verification, Cherenkov light, DCVD, Subatomic Physics, Subatomär fysik, Conference paper, info:eu-repo/semantics/conferenceObject, text |
| URL: | Proceedings of the INMM & ESARDA Joint Virtual Annual Meeting August 23-26 & August 30-September 1, 2021 |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/restrictedAccess |
| ملاحظة: | English |
| أرقام أخرى: | UPE oai:DiVA.org:uu-452259 0000-0001-8207-3462 0000-0002-5133-6829 0000-0002-3136-5665 1280664329 |
| المصدر المساهم: | UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1280664329 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |