Experimental investigation of optimum processes for the control of a nuclear reactor by the neutron flux

1975 ◽  
Vol 39 (6) ◽  
pp. 1088-1092
Author(s):  
G. N. Aleksakov ◽  
V. P. Alferov ◽  
V. I. Belousov
Keyword(s):  
Experimental Investigation ◽  
Neutron Flux ◽  
Nuclear Reactor

Experimental investigation on the coolability of nuclear reactor debris beds using seawater

2022 ◽  
Vol 184 ◽  
pp. 122347
Author(s):  
Zayed Ahmed ◽  
Chance Jordan ◽  
Prashant Jain ◽  
Kevin Robb ◽  
Hitesh Bindra ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Nuclear Reactor

THE PRODUCTION OF Na22 BY A (H3, n) REACTION IN A NUCLEAR REACTOR

1954 ◽  
Vol 32 (2) ◽  
pp. 94-97 ◽  
Author(s):  
L. G. Cook ◽  
K. D. Shafer
Keyword(s):  
Aluminum Alloy ◽  
Ion Exchange ◽  
Neutron Flux ◽  
Paper Chromatography ◽  
Half Life ◽  
Nuclear Reactor ◽  
Specific Activity ◽  
Separation And Purification

The positron emitting Na22 of 2.6 year half-life has been prepared in a nuclear reactor by the double reaction Li6(n, α)H3, Ne20(H3, n)Na22. The over-all yield was 2.3 × 10−7 atoms of Na22 per atom of tritium formed. Eleven grams of lithium as aluminum alloy turnings in a neon atmosphere at 200 p.s.i. was irradiated for 175 days in a neutron flux of about 4 × 1012 n./cm.2/sec. About 380 μc. of Na22 was obtained in a sodium extract having a specific activity of 10 mc. Na22/gm. of Na23. A specific activity in the curie/gm. level would be expected from a longer irradiation in the highest flux (6 × 1013 n./cm.2/sec.) in the NRX reactor. The separation and purification of the sodium proved practicable by paper chromatography or ion exchange; the analyses for trace Li and Na23 were carried out by radioactivation.

A Reduced Basis Approach for Modeling the Movement of Nuclear Reactor Control Rods

2016 ◽  
Vol 2 (2) ◽  
Author(s):  
Alberto Sartori ◽  
Antonio Cammi ◽  
Lelio Luzzi ◽  
Gianluigi Rozza
Keyword(s):  
Neutron Flux ◽  
Nuclear Reactor ◽  
Voronoi Tessellation ◽  
Sampling Technique ◽  
Computational Time ◽  
High Fidelity ◽  
Reduced Basis ◽  
Reactor Control ◽  
Control Rods ◽  
Nuclear Reactor Control

This work presents a reduced order model (ROM) aimed at simulating nuclear reactor control rods movement and featuring fast-running prediction of reactivity and neutron flux distribution as well. In particular, the reduced basis (RB) method (built upon a high-fidelity finite element (FE) approximation) has been employed. The neutronics has been modeled according to a parametrized stationary version of the multigroup neutron diffusion equation, which can be formulated as a generalized eigenvalue problem. Within the RB framework, the centroidal Voronoi tessellation is employed as a sampling technique due to the possibility of a hierarchical parameter space exploration, without relying on a “classical” a posteriori error estimation, and saving an important amount of computational time in the offline phase. Here, the proposed ROM is capable of correctly predicting, with respect to the high-fidelity FE approximation, both the reactivity and neutron flux shape. In this way, a computational speedup of at least three orders of magnitude is achieved. If a higher precision is required, the number of employed basis functions (BFs) must be increased.

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