Study on the criticality monitoring method by measurements of short-half-life noble-gas fission products for the criticality monitoring of fuel debris inside a primary containment vessel of Fukushima Daiichi Nuclear Power Stations

Riyana, E. S. ; Sakamoto, Masahiro ; Matsumura, Taichi ; Terashima, Kenichi ; Okumura, Keisuke

We investigated the possibility of estimating the effective neutron multiplication factor (keff) of the fuel-debris inside the primary containment vessel (PCV) of unit-2 of Fukushima Daiichi Nuclear Power Station (1F) using remote gas-radioactivity measurement. Our calculation result demonstrates the correlation between keff and the activity ratio (AR) of $^{88}$ Kr-to- $^{135}$ Xe for various fuel debris compositions and geometry. We also show the time-dependent behavior of the AR of $^{88}$ Kr-to- $^{135}$ Xe when the keff changes suddenly in PCV.

Language	:	English
Journal	:
Volume	:
Number	:
Pages	:
Publication Year/Month	:
Meeting title	:	日本原子力学会2023年春の年会
Held date	:	2023/03
Location (city)	:	東京
Location (country)	:	日本
Patent information	:
PDF	:
Paper URL	:
DOI for research data	:
Keywords	:	福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident; Fuel Debris; Subcritical System; Monte Carlo Calculation; Short Half-life Fission Products
Research Facility	:
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:

Accesses	:	- Accesses
Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:
Altmetrics	:

Registration No. : BB20221559
JAEA Abstracts No. :
Paper Submission No. :

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.