The effect of clogging of the spacer grid on the critical heat flux of a pressureless fuel rod simulator
| dc.contributor.author | Mrázová, Anna | |
| dc.contributor.editor | Mašata, David | |
| dc.date.accessioned | 2025-09-22T08:05:53Z | |
| dc.date.available | 2025-09-22T08:05:53Z | |
| dc.date.issued | 2025 | |
| dc.description.abstract-translated | This poster investigates the influence of partial and complete blockage of the spacer grid on the power required to reach the critical coolant temperature in a vertical unpressurized experimental loop containing a single heated rod simulating a nuclear fuel element. Flow restrictors were designed to obstruct approximately one-third and three-quarters of the flow cross-section, respectively. The experimental setup included a glass channel, a directly heated stainless-steel rod, and advanced data acquisition via thermocouples and ultrasonic flow sensors. Experiments were carried out under various coolant flow rates, and critical heat flux conditions were evaluated. Results show that at higher flow rates, increased power was required to reach the set critical temperature of 180 °C, even in the presence of flow obstruction. Contrary to expectations, the introduced foreign objects (flow restrictors) enhanced local coolant mixing, delaying the onset of critical heat flux compared to the unobstructed case. The presence of the foreign element did not cause local overheating but showed a beneficial thermohydraulic eSect under tested conditions. These findings are particularly relevant for understanding post-operational behaviour of impurities in spent fuel pools where flow rates and thermal conditions diSer significantly from reactor cores. | en |
| dc.format | 2 s. | cs |
| dc.identifier.isbn | 978-80-261-1307-2 | |
| dc.identifier.isbn | 978-80-261-1308-9 (printed) | |
| dc.identifier.uri | http://hdl.handle.net/11025/62815 | |
| dc.language.iso | en | en |
| dc.publisher | University of West Bohemia in Pilsen | en |
| dc.rights | © University of West Bohemia in Pilsen | en |
| dc.rights.access | openAccess | en |
| dc.subject | poster | cs |
| dc.subject.translated | poster | en |
| dc.title | The effect of clogging of the spacer grid on the critical heat flux of a pressureless fuel rod simulator | en |
| dc.type | konferenční příspěvek | cs |
| dc.type | conferenceObject | en |
| dc.type.status | Peer reviewed | en |
| local.files.count | 2 | * |
| local.files.size | 6935191 | * |
| local.has.files | yes | * |
Files
License bundle
1 - 1 out of 1 results
No Thumbnail Available
- Name:
- license.txt
- Size:
- 1.71 KB
- Format:
- Item-specific license agreed upon to submission
- Description: