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On May 22, 2023 at 3:05:27 PM UTC,
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| f | 1 | { | f | 1 | { |
| 2 | "author": "", | 2 | "author": "", | ||
| 3 | "author_email": null, | 3 | "author_email": null, | ||
| 4 | "creator_user_id": "fa193346-5c2f-457e-8f46-c1990af53f97", | 4 | "creator_user_id": "fa193346-5c2f-457e-8f46-c1990af53f97", | ||
| 5 | "id": "d629ed96-30de-46b1-b7d7-0813105ca33a", | 5 | "id": "d629ed96-30de-46b1-b7d7-0813105ca33a", | ||
| 6 | "license_id": "iaea", | 6 | "license_id": "iaea", | ||
| 7 | "maintainer": "", | 7 | "maintainer": "", | ||
| 8 | "maintainer_email": "", | 8 | "maintainer_email": "", | ||
| 9 | "metadata_created": "2023-05-22T15:03:25.307748", | 9 | "metadata_created": "2023-05-22T15:03:25.307748", | ||
| t | 10 | "metadata_modified": "2023-05-22T15:05:25.235896", | t | 10 | "metadata_modified": "2023-05-22T15:05:27.276072", |
| 11 | "name": "kit-cora-15-1", | 11 | "name": "kit-cora-15-1", | ||
| 12 | "notes": "The CORA-15 bundle test was performed under transient | 12 | "notes": "The CORA-15 bundle test was performed under transient | ||
| 13 | conditions typical for many CORA-PWR tests with bundle containing two | 13 | conditions typical for many CORA-PWR tests with bundle containing two | ||
| 14 | Ag-In-Cd neutron absorber rods. Unlike other CORA bundles, all heated | 14 | Ag-In-Cd neutron absorber rods. Unlike other CORA bundles, all heated | ||
| 15 | and unheated fuel rod simulators (16 + 7 correspondingly) were filled | 15 | and unheated fuel rod simulators (16 + 7 correspondingly) were filled | ||
| 16 | with helium and pressurized to 6.0 MPa before transient. During the | 16 | with helium and pressurized to 6.0 MPa before transient. During the | ||
| 17 | transient, all rods underwent ballooning and burst. Ballooning | 17 | transient, all rods underwent ballooning and burst. Ballooning | ||
| 18 | progressed for about 100 s. Bursts occurred within 150 s (between 3500 | 18 | progressed for about 100 s. Bursts occurred within 150 s (between 3500 | ||
| 19 | and 3650 s) in the temperature bandwidth between about 700 and 800 | 19 | and 3650 s) in the temperature bandwidth between about 700 and 800 | ||
| 20 | \u00b0C. The mostly probable burst elevation for the bundle was at 750 | 20 | \u00b0C. The mostly probable burst elevation for the bundle was at 750 | ||
| 21 | mm (which was the hottest elevation during the burst period). | 21 | mm (which was the hottest elevation during the burst period). | ||
| 22 | \r\nDuring further heat-ups, temperature escalation due to the | 22 | \r\nDuring further heat-ups, temperature escalation due to the | ||
| 23 | zirconium-steam reaction starts at elevations of 550 to 950 mm at | 23 | zirconium-steam reaction starts at elevations of 550 to 950 mm at | ||
| 24 | temperature of about 1100 \u00b0C. In presence of PWR absorber rods, | 24 | temperature of about 1100 \u00b0C. In presence of PWR absorber rods, | ||
| 25 | the sequence of failure starts with the release, relocation, and | 25 | the sequence of failure starts with the release, relocation, and | ||
| 26 | re-solidification of the (Ag, In, Cd) melt. The melt release occurred | 26 | re-solidification of the (Ag, In, Cd) melt. The melt release occurred | ||
| 27 | between 1290 and 1350 \u00b0C at elevations between 750 and 800 mm. | 27 | between 1290 and 1350 \u00b0C at elevations between 750 and 800 mm. | ||
| 28 | Most of the melt reacted with the cladding and guide tube by | 28 | Most of the melt reacted with the cladding and guide tube by | ||
| 29 | liquefying the zirconium components, forming a metallic melt of the | 29 | liquefying the zirconium components, forming a metallic melt of the | ||
| 30 | type (Ag, In, Zr). This melt was capable of dissolving Zircaloy as low | 30 | type (Ag, In, Zr). This melt was capable of dissolving Zircaloy as low | ||
| 31 | as 1250 \u00b0C, i.e., clearly below the melting point of Zircaloy | 31 | as 1250 \u00b0C, i.e., clearly below the melting point of Zircaloy | ||
| 32 | (1760 \u00b0C).\r\nDuring the temperature escalation above 1800 | 32 | (1760 \u00b0C).\r\nDuring the temperature escalation above 1800 | ||
| 33 | \u00b0C, Zr melt formed in the gap between ZrO2 and UO2 was relocated | 33 | \u00b0C, Zr melt formed in the gap between ZrO2 and UO2 was relocated | ||
| 34 | partially inside the gap to lower bundle elevations and partially | 34 | partially inside the gap to lower bundle elevations and partially | ||
| 35 | penetrated through the failed ZrO2 layer into the space between its | 35 | penetrated through the failed ZrO2 layer into the space between its | ||
| 36 | neighbouring elements. The resulting melt of the fuel rod interaction, | 36 | neighbouring elements. The resulting melt of the fuel rod interaction, | ||
| 37 | containing mainly U, Zr and O relocated downwards as a slug and | 37 | containing mainly U, Zr and O relocated downwards as a slug and | ||
| 38 | solidified between 400 and 550 mm according to its solidus temperature | 38 | solidified between 400 and 550 mm according to its solidus temperature | ||
| 39 | as a large lump of porous structure. The maximum bundle blockage | 39 | as a large lump of porous structure. The maximum bundle blockage | ||
| 40 | (almost 100%) was observed at the top of the Inconel grid spacer (at | 40 | (almost 100%) was observed at the top of the Inconel grid spacer (at | ||
| 41 | about 500 mm). The (Ag, In, Cd) absorber melt with the much lower | 41 | about 500 mm). The (Ag, In, Cd) absorber melt with the much lower | ||
| 42 | solidus temperature solidified down at the lower elevation of about | 42 | solidus temperature solidified down at the lower elevation of about | ||
| 43 | 150 mm.\r\nPost-test investigations showed negligible oxidized | 43 | 150 mm.\r\nPost-test investigations showed negligible oxidized | ||
| 44 | cladding up to elevation of about 350 mm. The claddings were | 44 | cladding up to elevation of about 350 mm. The claddings were | ||
| 45 | completely oxidized between elevations 480 and 1000 mm. The maximum | 45 | completely oxidized between elevations 480 and 1000 mm. The maximum | ||
| 46 | hydrogen release rate of 210 mg/s was measured on the end of the | 46 | hydrogen release rate of 210 mg/s was measured on the end of the | ||
| 47 | transient (4800 s). The total hydrogen release was 145 \u00b1 15 g", | 47 | transient (4800 s). The total hydrogen release was 145 \u00b1 15 g", | ||
| 48 | "owner_org": "dd7599ef-0a83-4e45-bbed-e3dcfcdff6b1", | 48 | "owner_org": "dd7599ef-0a83-4e45-bbed-e3dcfcdff6b1", | ||
| 49 | "private": false, | 49 | "private": false, | ||
| 50 | "revision_id": "da2de98d-14f0-47b9-812d-74807ac192a9", | 50 | "revision_id": "da2de98d-14f0-47b9-812d-74807ac192a9", | ||
| 51 | "state": "active", | 51 | "state": "active", | ||
| 52 | "title": "KIT CORA-15", | 52 | "title": "KIT CORA-15", | ||
| 53 | "type": "dataset", | 53 | "type": "dataset", | ||
| 54 | "url": "", | 54 | "url": "", | ||
| 55 | "version": "1.0" | 55 | "version": "1.0" | ||
| 56 | } | 56 | } |