EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR
EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR. Few decades ago a large number of nuclear reactors were designed to use HEU as the fuel. But the use of HEU is being discouraged since it can be used as a nuclear explosive material which makes its prol...
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| Format: | Article |
| Language: | English |
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Pusat Teknologi Bahan Bakar Nuklir
2022-02-01
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| Series: | Urania |
| Online Access: | http://jurnal.batan.go.id/index.php/urania/article/view/6625 |
| _version_ | 1818007682462777344 |
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| author | Suwoto Suwoto R. Andika Putra Dwijayanto Wahid Luthfi Zuhair Zuhair |
| author_facet | Suwoto Suwoto R. Andika Putra Dwijayanto Wahid Luthfi Zuhair Zuhair |
| author_sort | Suwoto Suwoto |
| collection | DOAJ |
| description | EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR. Few decades ago a large number of nuclear reactors were designed to use HEU as the fuel. But the use of HEU is being discouraged since it can be used as a nuclear explosive material which makes its proliferation potential. Most of the HEU-fueled nuclear reactors in the world are either closed or being converted to other types having LEU fuel with 235U enrichment below than 20%. To extend lifetime, LEU fuel with high density is developed. The change in fuel density from low to high will also change core neutronics and thermal-hydraulics of the reactor, and as a result, it affects the transient response of the reactor. This paper studies the effects of fuel density on reactivity coefficients and kinetic parameters of pebble bed reactor through several calculations with MCNP6 code combine with ENDF/B-VII continuous energy cross-section nuclear data library. The overall calculation results show that the Doppler temperature coefficient (DTC) increases with the increase of fuel density, but the moderator temperature coefficient (MTC) decreases due to hardening of neutron spectrum. Kinetic parameters such as effective delayed neutron fraction (βeff), prompt neutron lifetime (ℓ) and neutron generation time (Ʌ) which significantly reduced with increasing fuel density will strongly affect the reactor control and safety. The results of this work conclude that the selection of 9-15 g/cm3 fuel density should be considered carefully given its effect on reactor controllability. |
| first_indexed | 2024-04-14T05:18:53Z |
| format | Article |
| id | doaj.art-c9765347c6a94c1abf91484594c4a972 |
| institution | Directory Open Access Journal |
| issn | 0852-4777 2528-0473 |
| language | English |
| last_indexed | 2024-04-14T05:18:53Z |
| publishDate | 2022-02-01 |
| publisher | Pusat Teknologi Bahan Bakar Nuklir |
| record_format | Article |
| series | Urania |
| spelling | doaj.art-c9765347c6a94c1abf91484594c4a9722022-12-22T02:10:17ZengPusat Teknologi Bahan Bakar NuklirUrania0852-47772528-04732022-02-01281455610.17146/urania.2022.28.1.66255349EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTORSuwoto Suwoto0R. Andika Putra Dwijayanto1Wahid Luthfi2Zuhair Zuhair3Pusat Riset Teknologi Reaktor Nnuklir Organisasi Riset Teknologi Nuklir Badan Riset dan Inovasi Nasional (BRIN)Pusat Riset Teknologi Reaktor Nnuklir Organisasi Riset Teknologi Nuklir Badan Riset dan Inovasi Nasional (BRIN)Pusat Riset Teknologi Reaktor Nnuklir Organisasi Riset Teknologi Nuklir Badan Riset dan Inovasi Nasional (BRIN)Pusat Riset Teknologi Reaktor Nnuklir Organisasi Riset Teknologi Nuklir Badan Riset dan Inovasi Nasional (BRIN)EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR. Few decades ago a large number of nuclear reactors were designed to use HEU as the fuel. But the use of HEU is being discouraged since it can be used as a nuclear explosive material which makes its proliferation potential. Most of the HEU-fueled nuclear reactors in the world are either closed or being converted to other types having LEU fuel with 235U enrichment below than 20%. To extend lifetime, LEU fuel with high density is developed. The change in fuel density from low to high will also change core neutronics and thermal-hydraulics of the reactor, and as a result, it affects the transient response of the reactor. This paper studies the effects of fuel density on reactivity coefficients and kinetic parameters of pebble bed reactor through several calculations with MCNP6 code combine with ENDF/B-VII continuous energy cross-section nuclear data library. The overall calculation results show that the Doppler temperature coefficient (DTC) increases with the increase of fuel density, but the moderator temperature coefficient (MTC) decreases due to hardening of neutron spectrum. Kinetic parameters such as effective delayed neutron fraction (βeff), prompt neutron lifetime (ℓ) and neutron generation time (Ʌ) which significantly reduced with increasing fuel density will strongly affect the reactor control and safety. The results of this work conclude that the selection of 9-15 g/cm3 fuel density should be considered carefully given its effect on reactor controllability.http://jurnal.batan.go.id/index.php/urania/article/view/6625 |
| spellingShingle | Suwoto Suwoto R. Andika Putra Dwijayanto Wahid Luthfi Zuhair Zuhair EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR Urania |
| title | EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR |
| title_full | EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR |
| title_fullStr | EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR |
| title_full_unstemmed | EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR |
| title_short | EFFECTS OF FUEL DENSITY ON REACTIVITY COEFFICIENTS AND KINETIC PARAMETERS OF PEBBLE BED REACTOR |
| title_sort | effects of fuel density on reactivity coefficients and kinetic parameters of pebble bed reactor |
| url | http://jurnal.batan.go.id/index.php/urania/article/view/6625 |
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