Published December 2022 | Version v1
Journal article Metadata-only

A new approach for modeling pulse height spectra of gamma-ray detectors from passing radioactive cloud in a case of NPP accident

Creators

  • 1. Nuclear Safety Institute of the Russian Academy of Sciences, Moscow (Russian Federation)

Description

A comprehensive approach for modeling the pulse height spectra of gamma-ray detectors from passing radioactive cloud in a case of accident at NPP has been developed. It involves modeling the transport of radionuclides in the atmosphere using Lagrangian stochastic model, WRF meteorological processor with an ARW core and GFS data to obtain spatial distribution of radionuclides in the air at a given moment of time. Applying representation of the cloud as superposition of elementary sources of gamma radiation the pulse height spectra are calculated based on data on flux density from point isotropic sources and detector response function. The proposed approach allows us to obtain time-dependent spectra for any complex radionuclide composition of the release. The results of modeling the pulse height spectra of the scintillator detector NaI(Tl) Ø63x63 mm for a hypothetical severe accident at a NPP are presented

Additional details

Publishing Information

Journal Title
Nuclear Engineering and Technology
Journal Volume
54
Journal Issue
12
Journal Page Range
p. 4715-4721
ISSN
1738-5733

INIS

Country of Publication
Korea, Republic of
Country of Input or Organization
Korea, Republic of
INIS RN
55095408
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
ATMOSPHERES; GAMMA RADIATION; METEOROLOGY; NAI DETECTORS; NUCLEAR POWER PLANTS; RADIOACTIVE CLOUDS; RADIONUCLIDE MIGRATION; SEVERE ACCIDENTS; SIMULATION
Descriptors DEC
ACCIDENTS; BEYOND-DESIGN-BASIS ACCIDENTS; CLOUDS; ELECTROMAGNETIC RADIATION; ENVIRONMENTAL TRANSPORT; IONIZING RADIATIONS; MASS TRANSFER; MEASURING INSTRUMENTS; NUCLEAR FACILITIES; POWER PLANTS; RADIATION DETECTORS; RADIATIONS; SCINTILLATION COUNTERS; SOLID SCINTILLATION DETECTORS; THERMAL POWER PLANTS

Optional Information

Notes
28 refs, 8 figs