Irradiation growth of graphite in reflector elements of JRR-4

Horiguchi, Hironori; Shibata, Taiju ; Yagi, Masahiro ; Yokoo, Kenji ; Oyama, Koji; Kusunoki, Tsuyoshi

The Japan Research Reactor No.4 (JRR-4) are used for medical irradiation (Boron Neutron Capture Therapy), education and training for engineers, activation analysis and researches in various fields. A crack was found on the weld of aluminum cladding of a reflector element, in which graphite reflector was set. A survey on the reflector element confirmed that the crack was caused by growth of graphite. The growth of graphite was observed in the other reflector elements by the radiographic testing (RT). In order to understand the relations between irradiation fluence and irradiation growth, the dimensions of irradiated graphite reflectors were precisely measured after dismantling the reflector elements. We revealed that the growth of graphite increased with fast neutron fluence at low temperature which was estimated below 200 $^{circ}$ C under JRR-4 operation condition.

Language	:	English
Journal	:
Volume	:
Number	:
Pages	:
Publication Year/Month	:
Meeting title	:	13th International Topical Meeting on Research Reactor Fuel Management (RRFM 2009)
Held date	:	2009/03
Location (city)	:	Vienna
Location (country)	:	Austria
Patent information	:
PDF	:
Paper URL	:
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	JRR-4(研究炉4)
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. : BB20083763
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.