determination of power density in vver-1000 mock-up in lr-0 reactor
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ID: 136922
2017
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Abstract
The pin power density is an important quantity which has to be monitored during the reactor operation, for two main reasons. Firstly, it is part of the limits and conditions of safe operation and, secondly, it is source term in neutron transport calculations used for the adequate assessing of the state of core structures and pressure vessel material. It is often calculated using deterministic codes which may have problems with an adequate definition of boundary conditions in subcritical regions. This may lead to overestimation of real situation, and therefore the validation of the utility codes contributes not only to better fuel utilization, but also to more precise description of radiation situation in structural components of core. Current paper presents methods developed at LR-0 reactor, as well as selected results for pin power density measurement in peripheral regions of VVER-1000 mock-up. The presented data show that the results of a utility diffusion code at core boundary overestimate the measurement. This situation, however satisfactory safe, may lead to unduly conservative approach in the determination of radiation damage of core structures.
| Reference Key |
michal2017epjdetermination
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|---|---|
| Authors | ;Košál Michal;Rypar Vojtìch;Harutyunyan Davit;Schulc Martin;Losa Evžen |
| Journal | utilitas mathematica |
| Year | 2017 |
| DOI |
10.1051/epjconf/201715302001
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