Impact of fuel type and discharge burnup on source term

    Research output: Contribution to conferenceConference articleScientificpeer-review

    Abstract

    Knowledge of spent nuclear fuel (SNF) source term (decay heat, reactivity, nuclide inventory, other relevant properties of SNF) is essential in the safe handling and final disposal of SNF. For example, decay heat power is one of the key limiting factors to determine how densely the fuel canisters can be packed in the final disposal tunnels. The fuel type and burnup affect the nuclide inventory of the SNF and therefore have an essential impact on the source term. Fuel discharge burnup has increased over time and new types of fuel typically enable higher burnups than before. In Finland, two different reactor types have been operated (VVER-440 and BWR) and two others (EPR and VVER-1200) are planned to be operated in the near future. The fuel assembly design used in these types of reactors varies in many parameters such as e.g. geometric shape, axial enrichment zoning and nuclide content (VVER-1200). Also, several different fuel assembly types can be used in one type of a reactor. The possible differences include e.g. average enrichment, enrichment zoning, number of burnable absorber rods and geometric parameters, such as fuel pellet dimensions and cladding thickness. The operating parameters such as power and boron concentration also depend on the reactor and fuel assembly types and have an effect on the SNF source term. In this work, the source term of different VVER-440 and VVER-1200 fuel assemblies are calculated as a function of fuel burnup using the Monte Carlo particle transport code Serpent 2. The effect of burnup and fuel type to different components of the source term such as decay heat, activity and the nuclide inventory will be examined.
    Original languageEnglish
    Publication statusPublished - 2019
    MoE publication typeNot Eligible
    Event28th International Conference Nuclear Energy for New Europe, NENE 2019 - Grand Hotel Bernardin, Portorož, Slovenia
    Duration: 9 Sep 201912 Sep 2019
    Conference number: 28
    http://www.nss.si/nene2019/

    Conference

    Conference28th International Conference Nuclear Energy for New Europe, NENE 2019
    Abbreviated titleNENE 2019
    CountrySlovenia
    CityPortorož
    Period9/09/1912/09/19
    Internet address

    Fingerprint

    Spent fuels
    Nuclear fuels
    Isotopes
    Zoning
    Safe handling
    Paramagnetic resonance
    Boron
    Tunnels
    Hot Temperature

    Cite this

    Juutilainen, P., & Häkkinen, S. (2019). Impact of fuel type and discharge burnup on source term. Paper presented at 28th International Conference Nuclear Energy for New Europe, NENE 2019, Portorož, Slovenia.
    Juutilainen, Pauli ; Häkkinen, Silja. / Impact of fuel type and discharge burnup on source term. Paper presented at 28th International Conference Nuclear Energy for New Europe, NENE 2019, Portorož, Slovenia.
    @conference{e05f5abb875d48ada39ba52fce9d1b75,
    title = "Impact of fuel type and discharge burnup on source term",
    abstract = "Knowledge of spent nuclear fuel (SNF) source term (decay heat, reactivity, nuclide inventory, other relevant properties of SNF) is essential in the safe handling and final disposal of SNF. For example, decay heat power is one of the key limiting factors to determine how densely the fuel canisters can be packed in the final disposal tunnels. The fuel type and burnup affect the nuclide inventory of the SNF and therefore have an essential impact on the source term. Fuel discharge burnup has increased over time and new types of fuel typically enable higher burnups than before. In Finland, two different reactor types have been operated (VVER-440 and BWR) and two others (EPR and VVER-1200) are planned to be operated in the near future. The fuel assembly design used in these types of reactors varies in many parameters such as e.g. geometric shape, axial enrichment zoning and nuclide content (VVER-1200). Also, several different fuel assembly types can be used in one type of a reactor. The possible differences include e.g. average enrichment, enrichment zoning, number of burnable absorber rods and geometric parameters, such as fuel pellet dimensions and cladding thickness. The operating parameters such as power and boron concentration also depend on the reactor and fuel assembly types and have an effect on the SNF source term. In this work, the source term of different VVER-440 and VVER-1200 fuel assemblies are calculated as a function of fuel burnup using the Monte Carlo particle transport code Serpent 2. The effect of burnup and fuel type to different components of the source term such as decay heat, activity and the nuclide inventory will be examined.",
    author = "Pauli Juutilainen and Silja H{\"a}kkinen",
    year = "2019",
    language = "English",
    note = "28th International Conference Nuclear Energy for New Europe, NENE 2019, NENE 2019 ; Conference date: 09-09-2019 Through 12-09-2019",
    url = "http://www.nss.si/nene2019/",

    }

    Juutilainen, P & Häkkinen, S 2019, 'Impact of fuel type and discharge burnup on source term', Paper presented at 28th International Conference Nuclear Energy for New Europe, NENE 2019, Portorož, Slovenia, 9/09/19 - 12/09/19.

    Impact of fuel type and discharge burnup on source term. / Juutilainen, Pauli; Häkkinen, Silja.

    2019. Paper presented at 28th International Conference Nuclear Energy for New Europe, NENE 2019, Portorož, Slovenia.

    Research output: Contribution to conferenceConference articleScientificpeer-review

    TY - CONF

    T1 - Impact of fuel type and discharge burnup on source term

    AU - Juutilainen, Pauli

    AU - Häkkinen, Silja

    PY - 2019

    Y1 - 2019

    N2 - Knowledge of spent nuclear fuel (SNF) source term (decay heat, reactivity, nuclide inventory, other relevant properties of SNF) is essential in the safe handling and final disposal of SNF. For example, decay heat power is one of the key limiting factors to determine how densely the fuel canisters can be packed in the final disposal tunnels. The fuel type and burnup affect the nuclide inventory of the SNF and therefore have an essential impact on the source term. Fuel discharge burnup has increased over time and new types of fuel typically enable higher burnups than before. In Finland, two different reactor types have been operated (VVER-440 and BWR) and two others (EPR and VVER-1200) are planned to be operated in the near future. The fuel assembly design used in these types of reactors varies in many parameters such as e.g. geometric shape, axial enrichment zoning and nuclide content (VVER-1200). Also, several different fuel assembly types can be used in one type of a reactor. The possible differences include e.g. average enrichment, enrichment zoning, number of burnable absorber rods and geometric parameters, such as fuel pellet dimensions and cladding thickness. The operating parameters such as power and boron concentration also depend on the reactor and fuel assembly types and have an effect on the SNF source term. In this work, the source term of different VVER-440 and VVER-1200 fuel assemblies are calculated as a function of fuel burnup using the Monte Carlo particle transport code Serpent 2. The effect of burnup and fuel type to different components of the source term such as decay heat, activity and the nuclide inventory will be examined.

    AB - Knowledge of spent nuclear fuel (SNF) source term (decay heat, reactivity, nuclide inventory, other relevant properties of SNF) is essential in the safe handling and final disposal of SNF. For example, decay heat power is one of the key limiting factors to determine how densely the fuel canisters can be packed in the final disposal tunnels. The fuel type and burnup affect the nuclide inventory of the SNF and therefore have an essential impact on the source term. Fuel discharge burnup has increased over time and new types of fuel typically enable higher burnups than before. In Finland, two different reactor types have been operated (VVER-440 and BWR) and two others (EPR and VVER-1200) are planned to be operated in the near future. The fuel assembly design used in these types of reactors varies in many parameters such as e.g. geometric shape, axial enrichment zoning and nuclide content (VVER-1200). Also, several different fuel assembly types can be used in one type of a reactor. The possible differences include e.g. average enrichment, enrichment zoning, number of burnable absorber rods and geometric parameters, such as fuel pellet dimensions and cladding thickness. The operating parameters such as power and boron concentration also depend on the reactor and fuel assembly types and have an effect on the SNF source term. In this work, the source term of different VVER-440 and VVER-1200 fuel assemblies are calculated as a function of fuel burnup using the Monte Carlo particle transport code Serpent 2. The effect of burnup and fuel type to different components of the source term such as decay heat, activity and the nuclide inventory will be examined.

    M3 - Conference article

    ER -

    Juutilainen P, Häkkinen S. Impact of fuel type and discharge burnup on source term. 2019. Paper presented at 28th International Conference Nuclear Energy for New Europe, NENE 2019, Portorož, Slovenia.