Temporal absences in observation records lead to release losses during the source term
inversions of atmospheric radionuclide emissions. Consequently, objectively-estimated …

Eleven years after the Fukushima accident, independent objective estimates of the
atmospheric 137 Cs release still suffer from discontinuities such as negative release terms …

The source term of atmospheric radionuclide releases is essential for the hazardous
consequence assessment and emergency response. However, the artificial release …

During nuclear accidents, large amounts of short-lived radionuclides are released into the
environment, causing acute health hazards to local populations. Therefore, it is particularly …

Modern society is confronted with emerging threats from chemical, biological, and
radiological (CBR) hazardous substances, which are intensively utilized in the chemical …

Abrupt air pollution accidents can endanger people's health and destroy the local ecological
environment. The appropriate emergency response can minimize the harmful effects of …

Release rate estimation is crucial for the consequence assessment and emergency decision-
making in nuclear accidents. However, inevitable model biases can lead to significant …

Source term estimation based on environmental monitoring data is a key method for
obtaining source information, which is required by the emergency response system. This …

Tritium contributes majority to the total airborne radioactive effluents from the nuclear facility
because of its considerable production and difficulty in separation. Tritium inventory in the …

In this study, we rigorously assess the performance of three gradient-free optimization
algorithms—Ensemble Kalman Inversion (EKI), Particle Swarm Optimization (PSO), and …