Calculating V-1000 Core Model With Serpent 2: HEXTRAN Code Sequence

    Research output: Contribution to conferenceConference articleScientific

    Abstract

    Continuous-energy Monte Carlo reactor physics code Serpent 2 was used to model the critical steady state conditions measured in V-1000 zero-power critical facility at the present day NRC “Kurchatov Institute”, Moscow in 1990-1992. The Serpent 2 results were compared to measurements and Serpent 2
    was used to generate group constants and albedo boundary conditions for two-group nodal diffusion reactor dynamics code HEXTRAN. The results of a HEXTRAN calculation of the steady state were compared to Serpent 2. Initial 3D Serpent 2 calculation produced an effective multiplication factor of keff = 1.01480 for the critical steady state. Subsequent calculations showed that adding the stainless steel spacer grids of the V-1000 core to the Serpent 2 model lowered this overestimation by 660 pcm. Furthermore, it was found that the soluble boron concentration of the steady state has the potential to shift the effective multiplication factor by up to 577 pcm while still staying within its experimental accuracy. When the soluble boron concentration was set to
    the highest allowable concentration within its experimental accuracy and the spacer grids were taken into account, Serpent 2 produced a keff = 1.00243 for the critical steady state. HEXTRAN produced an effective multiplication factor within 521 pcm of the corresponding full core Serpent 2 calculation. There was a tilt in the HEXTRAN solution relative to Serpent 2 such that the relative powers in the middle of the core were significantly underestimated.
    Original languageEnglish
    Number of pages6
    Publication statusPublished - 2017
    EventInternational Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017 - Jeju, Korea, Republic of
    Duration: 16 Apr 201720 Apr 2017

    Conference

    ConferenceInternational Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017
    Abbreviated titleM&C 2017
    CountryKorea, Republic of
    CityJeju
    Period16/04/1720/04/17

    Fingerprint

    multiplication
    spacers
    reactor physics
    grids
    Moscow
    albedo
    stainless steels
    boron
    reactors
    boundary conditions
    shift
    energy

    Keywords

    • Serpent
    • HEXTRAN
    • Monte Carlo neutronics
    • nodal diffusion

    Cite this

    Sahlberg, V. (2017). Calculating V-1000 Core Model With Serpent 2: HEXTRAN Code Sequence. Paper presented at International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017, Jeju, Korea, Republic of.
    Sahlberg, Ville. / Calculating V-1000 Core Model With Serpent 2 : HEXTRAN Code Sequence. Paper presented at International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017, Jeju, Korea, Republic of.6 p.
    @conference{9419d7d074854dfca15589c9347c18c1,
    title = "Calculating V-1000 Core Model With Serpent 2: HEXTRAN Code Sequence",
    abstract = "Continuous-energy Monte Carlo reactor physics code Serpent 2 was used to model the critical steady state conditions measured in V-1000 zero-power critical facility at the present day NRC “Kurchatov Institute”, Moscow in 1990-1992. The Serpent 2 results were compared to measurements and Serpent 2was used to generate group constants and albedo boundary conditions for two-group nodal diffusion reactor dynamics code HEXTRAN. The results of a HEXTRAN calculation of the steady state were compared to Serpent 2. Initial 3D Serpent 2 calculation produced an effective multiplication factor of keff = 1.01480 for the critical steady state. Subsequent calculations showed that adding the stainless steel spacer grids of the V-1000 core to the Serpent 2 model lowered this overestimation by 660 pcm. Furthermore, it was found that the soluble boron concentration of the steady state has the potential to shift the effective multiplication factor by up to 577 pcm while still staying within its experimental accuracy. When the soluble boron concentration was set tothe highest allowable concentration within its experimental accuracy and the spacer grids were taken into account, Serpent 2 produced a keff = 1.00243 for the critical steady state. HEXTRAN produced an effective multiplication factor within 521 pcm of the corresponding full core Serpent 2 calculation. There was a tilt in the HEXTRAN solution relative to Serpent 2 such that the relative powers in the middle of the core were significantly underestimated.",
    keywords = "Serpent, HEXTRAN, Monte Carlo neutronics, nodal diffusion",
    author = "Ville Sahlberg",
    note = "Peer-reviewed: Abstract only; International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017, M&C 2017 ; Conference date: 16-04-2017 Through 20-04-2017",
    year = "2017",
    language = "English",

    }

    Sahlberg, V 2017, 'Calculating V-1000 Core Model With Serpent 2: HEXTRAN Code Sequence', Paper presented at International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017, Jeju, Korea, Republic of, 16/04/17 - 20/04/17.

    Calculating V-1000 Core Model With Serpent 2 : HEXTRAN Code Sequence. / Sahlberg, Ville.

    2017. Paper presented at International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017, Jeju, Korea, Republic of.

    Research output: Contribution to conferenceConference articleScientific

    TY - CONF

    T1 - Calculating V-1000 Core Model With Serpent 2

    T2 - HEXTRAN Code Sequence

    AU - Sahlberg, Ville

    N1 - Peer-reviewed: Abstract only

    PY - 2017

    Y1 - 2017

    N2 - Continuous-energy Monte Carlo reactor physics code Serpent 2 was used to model the critical steady state conditions measured in V-1000 zero-power critical facility at the present day NRC “Kurchatov Institute”, Moscow in 1990-1992. The Serpent 2 results were compared to measurements and Serpent 2was used to generate group constants and albedo boundary conditions for two-group nodal diffusion reactor dynamics code HEXTRAN. The results of a HEXTRAN calculation of the steady state were compared to Serpent 2. Initial 3D Serpent 2 calculation produced an effective multiplication factor of keff = 1.01480 for the critical steady state. Subsequent calculations showed that adding the stainless steel spacer grids of the V-1000 core to the Serpent 2 model lowered this overestimation by 660 pcm. Furthermore, it was found that the soluble boron concentration of the steady state has the potential to shift the effective multiplication factor by up to 577 pcm while still staying within its experimental accuracy. When the soluble boron concentration was set tothe highest allowable concentration within its experimental accuracy and the spacer grids were taken into account, Serpent 2 produced a keff = 1.00243 for the critical steady state. HEXTRAN produced an effective multiplication factor within 521 pcm of the corresponding full core Serpent 2 calculation. There was a tilt in the HEXTRAN solution relative to Serpent 2 such that the relative powers in the middle of the core were significantly underestimated.

    AB - Continuous-energy Monte Carlo reactor physics code Serpent 2 was used to model the critical steady state conditions measured in V-1000 zero-power critical facility at the present day NRC “Kurchatov Institute”, Moscow in 1990-1992. The Serpent 2 results were compared to measurements and Serpent 2was used to generate group constants and albedo boundary conditions for two-group nodal diffusion reactor dynamics code HEXTRAN. The results of a HEXTRAN calculation of the steady state were compared to Serpent 2. Initial 3D Serpent 2 calculation produced an effective multiplication factor of keff = 1.01480 for the critical steady state. Subsequent calculations showed that adding the stainless steel spacer grids of the V-1000 core to the Serpent 2 model lowered this overestimation by 660 pcm. Furthermore, it was found that the soluble boron concentration of the steady state has the potential to shift the effective multiplication factor by up to 577 pcm while still staying within its experimental accuracy. When the soluble boron concentration was set tothe highest allowable concentration within its experimental accuracy and the spacer grids were taken into account, Serpent 2 produced a keff = 1.00243 for the critical steady state. HEXTRAN produced an effective multiplication factor within 521 pcm of the corresponding full core Serpent 2 calculation. There was a tilt in the HEXTRAN solution relative to Serpent 2 such that the relative powers in the middle of the core were significantly underestimated.

    KW - Serpent

    KW - HEXTRAN

    KW - Monte Carlo neutronics

    KW - nodal diffusion

    M3 - Conference article

    ER -

    Sahlberg V. Calculating V-1000 Core Model With Serpent 2: HEXTRAN Code Sequence. 2017. Paper presented at International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering, M&C 2017, Jeju, Korea, Republic of.