ROSA/LSTF test and RELAP5 code analyses on PWR 1% vessel upper head small-break LOCA with accident management measure based on core exit temperature
An experiment was performed using the large-scale test facility (LSTF), which simulated a 1% vessel upper head small-break loss-of-coolant accident with an accident management (AM) measure under an assumption of total-failure of high-pressure injection (HPI) system in a pressurized water reactor (PW...
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| Format: | Article |
| Language: | English |
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Elsevier
2018-12-01
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| Series: | Nuclear Engineering and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573318301542 |
| _version_ | 1819075418025623552 |
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| author | Takeshi Takeda |
| author_facet | Takeshi Takeda |
| author_sort | Takeshi Takeda |
| collection | DOAJ |
| description | An experiment was performed using the large-scale test facility (LSTF), which simulated a 1% vessel upper head small-break loss-of-coolant accident with an accident management (AM) measure under an assumption of total-failure of high-pressure injection (HPI) system in a pressurized water reactor (PWR). In the LSTF test, liquid level in the upper head affected break flow rate. Coolant was manually injected from the HPI system into cold legs as the AM measure when the maximum core exit temperature reached 623 K. The cladding surface temperature largely increased due to late and slow response of the core exit thermocouples. The AM measure was confirmed to be effective for the core cooling. The RELAP5/MOD3.3 code indicated insufficient prediction of primary coolant distribution. The author conducted uncertainty analysis for the LSTF test employing created phenomena identification and ranking table for each component. The author clarified that peak cladding temperature was largely dependent on the combination of multiple uncertain parameters within the defined uncertain ranges. Keywords: Pressurized water reactor, Large-scale test facility, Vessel upper head, Loss-of-coolant accident, Core exit temperature, RELAP5 code |
| first_indexed | 2024-12-21T18:25:05Z |
| format | Article |
| id | doaj.art-44bc54774a024717a1141471bf99522c |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-12-21T18:25:05Z |
| publishDate | 2018-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-44bc54774a024717a1141471bf99522c2022-12-21T18:54:27ZengElsevierNuclear Engineering and Technology1738-57332018-12-0150814121420ROSA/LSTF test and RELAP5 code analyses on PWR 1% vessel upper head small-break LOCA with accident management measure based on core exit temperatureTakeshi Takeda0Nuclear Regulation Authority, Roppongi, Minato-ku, Tokyo, 106-8450, Japan; Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki-ken, 319-1195, Japan; Nuclear Regulation Authority, Roppongi, Minato-ku, Tokyo, 106-8450, Japan.An experiment was performed using the large-scale test facility (LSTF), which simulated a 1% vessel upper head small-break loss-of-coolant accident with an accident management (AM) measure under an assumption of total-failure of high-pressure injection (HPI) system in a pressurized water reactor (PWR). In the LSTF test, liquid level in the upper head affected break flow rate. Coolant was manually injected from the HPI system into cold legs as the AM measure when the maximum core exit temperature reached 623 K. The cladding surface temperature largely increased due to late and slow response of the core exit thermocouples. The AM measure was confirmed to be effective for the core cooling. The RELAP5/MOD3.3 code indicated insufficient prediction of primary coolant distribution. The author conducted uncertainty analysis for the LSTF test employing created phenomena identification and ranking table for each component. The author clarified that peak cladding temperature was largely dependent on the combination of multiple uncertain parameters within the defined uncertain ranges. Keywords: Pressurized water reactor, Large-scale test facility, Vessel upper head, Loss-of-coolant accident, Core exit temperature, RELAP5 codehttp://www.sciencedirect.com/science/article/pii/S1738573318301542 |
| spellingShingle | Takeshi Takeda ROSA/LSTF test and RELAP5 code analyses on PWR 1% vessel upper head small-break LOCA with accident management measure based on core exit temperature Nuclear Engineering and Technology |
| title | ROSA/LSTF test and RELAP5 code analyses on PWR 1% vessel upper head small-break LOCA with accident management measure based on core exit temperature |
| title_full | ROSA/LSTF test and RELAP5 code analyses on PWR 1% vessel upper head small-break LOCA with accident management measure based on core exit temperature |
| title_fullStr | ROSA/LSTF test and RELAP5 code analyses on PWR 1% vessel upper head small-break LOCA with accident management measure based on core exit temperature |
| title_full_unstemmed | ROSA/LSTF test and RELAP5 code analyses on PWR 1% vessel upper head small-break LOCA with accident management measure based on core exit temperature |
| title_short | ROSA/LSTF test and RELAP5 code analyses on PWR 1% vessel upper head small-break LOCA with accident management measure based on core exit temperature |
| title_sort | rosa lstf test and relap5 code analyses on pwr 1 vessel upper head small break loca with accident management measure based on core exit temperature |
| url | http://www.sciencedirect.com/science/article/pii/S1738573318301542 |
| work_keys_str_mv | AT takeshitakeda rosalstftestandrelap5codeanalysesonpwr1vesselupperheadsmallbreaklocawithaccidentmanagementmeasurebasedoncoreexittemperature |