scholarly journals Monte Carlo and deterministic simulations of activation ratio experiments for 238U(n,f), 238U(n,g) and 238U(n,2n) in the Big Ten benchmark critical assembly

2009 ◽  
Author(s):  
M Descalle ◽  
C Clouse ◽  
J Pruet
Keyword(s):  
Monte Carlo ◽  
Critical Assembly ◽  
Big Ten ◽  
Activation Ratio ◽  
Deterministic Simulations

Monte Carlo simulations of the water draining experimentof Giacint critical assembly

2021 ◽  
Vol 164 ◽  
pp. 108505 ◽  
Author(s):  
Yan Cao ◽  
Alberto Talamo ◽  
Yousry Gohar ◽  
S. Sikorin ◽  
S. Mandzik ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Critical Assembly

The Central Neutron Spectrum of the Fast Critical Assembly BIG-TEN

1975 ◽  
Vol 25 (2) ◽  
pp. 381-389 ◽  
Author(s):  
E. J. Dowdy ◽  
E. J. Lozito ◽  
E. A. Plassmann
Keyword(s):  
Neutron Spectrum ◽  
Critical Assembly ◽  
Big Ten

Experimental Study on Reactivity Worth of Burnable Poison in Ultra-Long Life, Small LMR

2002 ◽  
Author(s):  
Shigeto Kikuchi ◽  
Kenji Tsuji ◽  
Akira Nishikawa ◽  
Hiromitsu Inagaki ◽  
Kenichi Yoshioka ◽  
...  
Keyword(s):  
Experimental Study ◽  
Monte Carlo ◽  
Critical Assembly ◽  
Monte Carlo Code ◽  
Fuel Rods ◽  
Burnable Poison ◽  
Power Profile ◽  
Flux Profile ◽  
Long Life ◽  
Water Height

Experimental study using an LWR-type critical assembly, NCA, has been conducted on the reactivity worth of the burnable poison (BP) that is employed in a small reactor, 4S, for achieving an extremely long core life. The experimental BP is composed of natural gadolinium oxide (Gd2O3) mixed in polyethylene. Three types of BPs are prepared: polyethylene without Gd, polyethylene with Gd/H ratio of 0.015at% and 0.943at%. Reactivity worth of each BP assembly is measured through change in critical water height. Power profile of fuel rods and flux profile are also measured. Analyses are conducted with a Monte-Carlo code, MCNP.

Validation of Pb nuclear data by Monte Carlo analyses of sample reactivity experiments at Kyoto University Critical Assembly

2015 ◽  
Vol 53 (4) ◽  
pp. 602-612 ◽  
Author(s):  
Cheol Ho Pyeon ◽  
Atsushi Fujimoto ◽  
Takanori Sugawara ◽  
Takahiro Yagi ◽  
Hiroki Iwamoto ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Nuclear Data ◽  
Critical Assembly

Outbursts of comet Schwassmann-Wachmann 1, and the cloud of interplanetary boulders

1974 ◽  
Vol 22 ◽  
pp. 307 ◽  
Author(s):  
Zdenek Sekanina
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Interplanetary Space ◽  
Porous Matrix ◽  
Maximum Diameter ◽  
Expansion Velocity ◽  
Solid Constituent ◽  
Meteoric Material ◽  
Periodic Comet

AbstractIt is suggested that the outbursts of Periodic Comet Schwassmann-Wachmann 1 are triggered by impacts of interplanetary boulders on the surface of the comet’s nucleus. The existence of a cloud of such boulders in interplanetary space was predicted by Harwit (1967). We have used the hypothesis to calculate the characteristics of the outbursts – such as their mean rate, optically important dimensions of ejected debris, expansion velocity of the ejecta, maximum diameter of the expanding cloud before it fades out, and the magnitude of the accompanying orbital impulse – and found them reasonably consistent with observations, if the solid constituent of the comet is assumed in the form of a porous matrix of lowstrength meteoric material. A Monte Carlo method was applied to simulate the distributions of impacts, their directions and impact velocities.

Monte Carlo Algorithms for Moments of Transition Arrays

1988 ◽  
Vol 102 ◽  
pp. 79-81
Author(s):  
A. Goldberg ◽  
S.D. Bloom
Keyword(s):  
Monte Carlo ◽  
State Vector ◽  
Basis Vector ◽  
Collective State ◽  
Dispersion Characteristics ◽  
Dipole Strength ◽  
The Third ◽  
Monte Carlo Algorithms ◽  
Third Moment ◽  
Very High

AbstractClosed expressions for the first, second, and (in some cases) the third moment of atomic transition arrays now exist. Recently a method has been developed for getting to very high moments (up to the 12th and beyond) in cases where a “collective” state-vector (i.e. a state-vector containing the entire electric dipole strength) can be created from each eigenstate in the parent configuration. Both of these approaches give exact results. Herein we describe astatistical(or Monte Carlo) approach which requires onlyonerepresentative state-vector |RV> for the entire parent manifold to get estimates of transition moments of high order. The representation is achieved through the random amplitudes associated with each basis vector making up |RV>. This also gives rise to the dispersion characterizing the method, which has been applied to a system (in the M shell) with≈250,000 lines where we have calculated up to the 5th moment. It turns out that the dispersion in the moments decreases with the size of the manifold, making its application to very big systems statistically advantageous. A discussion of the method and these dispersion characteristics will be presented.

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