scholarly journals Study of neutron energy and directional distribution at the Beloyarsk NPP selected workplaces

2020 ◽  
Author(s):  
Mariia Pyshkina ◽  
Aleksey Vasilyev ◽  
Aleksey Ekidin ◽  
Evgeniy Nazarov ◽  
Vitaly Nikitenko ◽  
...  
Keyword(s):  
Neutron Energy ◽  
Directional Distribution

Analisis Pola Kebakaran Lahan di Kalimantan Timur dengan MODIS dan VIIRS

2020 ◽  
Vol 21 (1) ◽  
pp. 84
Author(s):  
Aditya Pranata Wibowo ◽  
Frederik Samuel Papilaya
Keyword(s):  
Spatial Autocorrelation ◽  
Nearest Neighbor ◽  
Directional Distribution

Kebakaran adalah suatu peristiwa timbulnya reaksi oksidasi saat adanya bahan bakar, oksigen, dan energi panas yang menyebabkan pembakaran yg tidak terkendali dan menyebabkan kerugian. Pemantauan secara spasial terhadap kebakaran menjadi suatu hal yang sangat penting untuk dikaji. Penelitian ini bertujuan untuk mengetahui daerah manakah yang paling banyak mengalami kebakaran dan juga pola dari kebakaran tersebut. Sumber data didapatkan dari website FIRMS yang merupakan data yang bersifat kuantitatif dan data primer. Metode analisis yang digunakan adalah metode analisis Spatial Autocorrelation, Average Nearest Neighbor, Optimized Hotspot, Directional Distribution (Standard Devitional Ellipse), dan Temporal Collect Event. Hasil yang telah didapatkan dari analisis bermetode Directional Distribution, Optimized Hotspot, dan Temporal Collect Event adalah terdapat banyak titik api yang berada di Kecamatan Kutai Kartanegara, Kutai Barat, Kutai Timur, Berau, dan Paser. Dalam analisis Spatial Autocorrelation ditemukan bahwa terdapat korelasi antara lokasi terjadinya titik api dan ukuran sejati dari titik api. Analisis Average Nearest Neighbor menunjukkan bahwa titik api terkumpul pada beberapa tempat dan tidak tersebar merata.

Space to Air High-Altitude Region Adjoint Neutron Transport

2021 ◽  
pp. 154851292110316
Author(s):  
Zachary W LaMere ◽  
Darren E Holland ◽  
Whitman T Dailey ◽  
John W McClory
Keyword(s):  
Energy Spectrum ◽  
High Altitude ◽  
Neutron Energy ◽  
Neutron Transport ◽  
Energy Sources ◽  
Source Spectrum ◽  
Detector Response ◽  
Neutron Energy Spectrum ◽  
True Source ◽  
Adjoint Transport

Neutrons from an atmospheric nuclear explosion can be detected by sensors in orbit. Current tools for characterizing the neutron energy spectrum assume a known source and use forward transport to recreate the detector response. In realistic scenarios the true source is unknown, making this an inefficient, iterative approach. In contrast, the adjoint approach directly solves for the source spectrum, enabling source reconstruction. The time–energy fluence at the satellite and adjoint transport equation allow a Monte Carlo method to characterize the neutron source’s energy spectrum directly in a new model: the Space to High-Altitude Region Adjoint (SAHARA) model. A new adjoint source event estimator was developed in SAHARA to find feasible solutions to the neutron transport problem given the constraints of the adjoint environment. This work explores SAHARA’s development and performance for mono-energetic and continuous neutron energy sources. In general, the identified spectra were shifted towards energies approximately 5% lower than the true source spectra, but SAHARA was able to capture the correct spectral shapes. Continuous energy sources, including real-world sources Fat Man and Little Boy, resulted in identifiable spectra that could have been produced by the same distribution as the true sources as demonstrated by two-dimensional (2D) Kolmogorov–Smirnov tests.

Neutron induced cross section measurements on gallium isotopes at neutron energy 14.90 ± 0.01 MeV and covariance analysis

2019 ◽  
Vol 992 ◽  
pp. 121613 ◽  
Author(s):  
Rebecca Pachuau ◽  
B. Lalremruata ◽  
A. Gandhi ◽  
S.V. Suryanarayana ◽  
B.K. Nayak ◽  
...  
Keyword(s):  
Cross Section ◽  
Neutron Energy ◽  
Covariance Analysis

Simulation and analysis of time-dependent neutron energy spectra

1995 ◽  
Vol 37 (10) ◽  
pp. 1187-1196 ◽  
Author(s):  
B Wolle ◽  
U Gerstel ◽  
K Hubner ◽  
L -G Eriksson ◽  
G Sadler ◽  
...  
Keyword(s):  
Neutron Energy ◽  
Time Dependent ◽  
Energy Spectra

Neutron-Energy Spectra for Fast Reactor Irradiation Effects

1970 ◽  
Vol 9 (4) ◽  
pp. 454-507 ◽  
Author(s):  
D. Okrent ◽  
W. B. Loewenstein ◽  
A. D. Rossin ◽  
A. B. Smith ◽  
B. A. Zolotar ◽  
...  
Keyword(s):  
Neutron Energy ◽  
Fast Reactor ◽  
Energy Spectra ◽  
Reactor Irradiation ◽  
Irradiation Effects

RBE as a Function of Neutron Energy: I. Experimental Observations

1975 ◽  
Vol 64 (2) ◽  
pp. 245 ◽  
Author(s):  
Eric J. Hall ◽  
Judy K. Novak ◽  
Albrecht M. Kellerer ◽  
Harald H. Rossi ◽  
Stephen Marino ◽  
...  
Keyword(s):  
Neutron Energy

Utilance photometry

2002 ◽  
Vol 34 (4) ◽  
pp. 269-275 ◽  
Author(s):  
JA Lynes
Keyword(s):  
Directional Distribution

A novel relationship is postulated expressing the direct ratio of a luminaire as a function of the room index. This permits the production of an approximate table of utilization factors for a given luminaire without any need for the directional distribution of intensity to be determined. Applications of the method are discussed.

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