Control Rod
Impact of control rod position and homogenization on sodium void effect in CFV-type SFR
... 3.1. Control Rod Partitioning and Homogenization Based on previous work [ 6 , 7 ], the 80 cm control rod absorber is partitioned into 10 cm segments, each assigned a unique set of cross ...
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Upgrade of apollo3® internal thermohydraulic feedback model with THEDI, and application to a control-rod ejection accident
... For the code-to-code benchmark, FLICA4 model used in CORPUS SALOME calculations uses “closed” channels in order to reproduce the multi-1D modelling of THEDI. However, CORPUS SALOME results with open channels in FLICA4 ...
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New calculation method for PWR control rod assemblies with APOLLO3®
... In order to reproduce this configuration, we propose a new representation of control rods for the lattice step of the calculation (cf. Fig. 4). The calculation is performed on a 3x3 cluster, with one ...
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ASTRID an innovative control rod system to manage reactivity
... all control rod groups (GD1 and GD2) are normally inserted, the analysis takes into account the fact that one control rod may be unloaded from the ...
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BFS-115 : An experimental physics program to measure sodium void and control rod worth in an axially-heterogeneous fast reactor core
... Abstract. As part of a bilateral agreement on the study of large axially-heterogeneous oxide-fueled SFR cores, CEA and IPPE have recently performed neutron physics experiments in the BFS facility. The configurations of ...
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Ag-In-Cd control rod behavior and aerosol formation in severe reactor accidents
... Ag-In-Cd control rod behavior and aerosol formation in severe reactor accidents are examined in an attempt to improve the methodology used to estimate reactor.. accident [r] ...
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Neutron flux monitoring with in-vessel fission chambers to detect an inadvertent control rod withdrawal in a sodium-cooled fast reactor
... Abstract Neutron flux monitoring system forms an integral part of the safety design of a Generation IV sodium cooled fast reactor system. During the initial design phase of a neutron flux monitoring system, one needs to ...
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Innovative Sodium Fast Reactors Control Rod Design
... pins size, alternative absorber materials, and application of moderators. These designs possess potentials to improve its neutronic characteristics safety margin, economical performance while its complete analysis ...
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Innovative sodium fast reactors control rod designs
... pins size, alternative absorber materials, and application of moderators. These designs possess potentials to improve its neutronic characteristics safety margin, economical performance while its complete analysis ...
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Uncertainty analysis methodology for multi-physics coupled rod ejection accident
... The control rod is inserted in the central assembly and the core is rendered critical by boron concentration ...the control rod worth and thus the inserted ...The control rod is ...
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Analysis of the rod-drop experiments performed during the CABRI commissioning tests
... Mean 1R 0.99 0.94 Tab 4. Reactivity Worth ($) inferred from the measurements and corrected by spatial MSM factors. Comparison with the calculated values. Results for “6R_P4” and “6R_P7” are questionable (red values in ...
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A numerical study of the penetration test at constant rod velocity
... In order to understand the mechanisms involved in the static penetration test and especially concerning the energy dissipation, the study of energy distributions is proposed for the static test presented. The energy ...
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IL-1β induces rod degeneration through the disruption of retinal glutamate homeostasis
... neurons—including rod and cone PRs—express glu- tamate ionotropic receptors such as AMPA and NMDA receptors [ 21 – 24 ], and glutamate excitotoxicity has been demonstrated to be a major threat for PR survival [ 20 ...
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KymoRod: a method for automated kinematic analysis of rod-shaped plant organs
... A major challenge in plant systems biology is the development of robust, predictive multiscale models for organ growth. In this context it is important to bridge the gap between the, rather well-documented molec- ular ...
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Asymptotic derivation of high-order rod models from non-linear 3D elasticity
... Ideal one-dimensional model In this section we explore a formal method for reducing the equilibrium of the prismatic solid, which is a problem in three-dimensional elasticity, to a one-d[r] ...
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Coupled fluid structure simulations for application to grid-to-rod fretting
... In a PWR, grid-to-rod fretting wear is generated at grid-to-rod contact areas by flow induced vibrations.[8] The internal vibrations are of three kinds: self-excited[r] ...
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Coupled wave propagation in a rod with a dynamic absorber layer
... Previous studies [21,22,36,42] relating vibration control to a continuous dynamic absorber layer focused on the attenuation of flexural or longitudinal wave propagation[r] ...
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Thioredoxin rod-derived cone viability factor protects against photooxidative retinal damage
... Nxnl1+/+ control mice (isogenic on BALB/c background) were exposed to either 1,700, 2,500 or 5,000 lx for 1 hour (h), sacrificed 10 days (d) later, and then their outer nuclear layer (ONL) thickness was ...to ...
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Hydraulic and statistical study of metastable phenomena in PWR rod bundles
... First, initial and intermediary states from 2D free- decay simulations were inserted as a cross- flow into a 3D flow with a large advection velocity in order to observe the decay process in a quasi-2D setup. Similarities ...
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Magnetically controlled growing rod in early onset scoliosis: a 30-case multicenter study
... at the end of follow-up if compared to a standard GR treatment. Alike in Choi et al.’s study [ 26 ], most of the revisions and complications (rod breakage and proximal pull-outs) were not related to the MCGR ...
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