97/04684 Chemical characterization of solid graphitic carbonaceous matter associated with the Oklo natural fission reactors and uranium ore deposits, Gabon (West Africa) (radioactive waste storage)

1997 ◽  
Vol 38 (6) ◽  
pp. 405
Author(s):  
E.V. Kuzmin ◽  
A.V. Kalakutskiy ◽  
M.A. Tarasov ◽  
A.A. Morozov

The paper presents a concept for disposal of Class 2 and Class 3 radioactive waste in existing workings and chambers in the underground uranium mines of the Priargunsky Industrial Mining and Chemical Union PJSC with isolation of radioactive waste storage chambers using paste backfilling made with processed uranium ore materials and sealing of cracks in host rock by injection consolidation. The need is shown to enhance the strength of radioactive waste containers to increase the number of tiers in the storage blocks to make better use of the available chamber space. Data is provided on the forecast hydrogeological conditions in deep levels (up to 1000 m) of Mine No.6.


2003 ◽  
Vol 27 (6) ◽  
pp. 957-967 ◽  
Author(s):  
Olivier Terra ◽  
Nicolas Clavier ◽  
Nicolas Dacheux ◽  
Renaud Podor

Author(s):  
J. B. Elder ◽  
B. J. Wiersma ◽  
R. L. Sindelar

Several of the high level radioactive waste storage tanks at the Savannah River Site (SRS) have been in service nearly 50 years. Periodic visual and ultrasonic (UT) nondestructive examinations (NDE) have been performed on the tanks to monitor the effects of service. These inspections revealed that several of the older tanks had suffered cracking as detected by through-wall visual indications. A new UT in-service inspection program has been recently established to provide for detection and characterization of cracking, thinning, or pitting of the sidewalls of the waste tanks. The program specifies examination of regions of the tank that would be most susceptible to corrosion attack, and to characterize the flaws and demonstrate acceptance to protect against potential leakage and instability. This paper summarizes the implementation of the program and inspection results for a tank that has been in service for over 40 years. No indications of reportable wall loss or pitting were detected. All thickness readings were above minimum design thickness. Several small indications of thinning were detected. The crack detection and sizing examinations detected five previously undetected indications, four of which were only partially through wall. The lengths of cracks that were examined are slightly longer than expected, but well below instability lengths.


1991 ◽  
Vol 93 (3) ◽  
pp. 611-635 ◽  
Author(s):  
Richard W. Stoffle ◽  
Michael W. Traugott ◽  
John V. Stone ◽  
Paula D. McIntyre ◽  
Florence V. Jensen ◽  
...  

Science ◽  
1995 ◽  
Vol 268 (5215) ◽  
pp. 1262-1263
Author(s):  
Ed Fuller

2020 ◽  
Vol 11 (2) ◽  
pp. 17-24
Author(s):  
D. N. Vlasov ◽  
◽  
D. N. Zamaskin ◽  
O. O. Kaminsky ◽  
A. V. Kamorny ◽  
...  

The article discusses one of today’s challenges, namely, the decommissioning of nuclear power facilities. It summarizes the experience in the decommissioning of radioactive waste storage facilities belonging to RosRAO’s Murmansk department branch of the Northwest Territorial District providing detailed overview of pre-decommissioning activities, as well as the decommissioning operations themselves, relevant technology and technical equipment applied. Pre-decommissioning stage involved large-scale efforts (2011—2015) on accumulated RW identifi cation and its inventory taking, as well as a comprehensive engineering radiation survey. Decommissioning projects have been developed and approved, a state environmental examination has been carried out with a Sanitary and Epidemiological Statement on compliance with state sanitary and epidemiological rules and regulations issued by FMBA of Russia. The paper presents the practice of constructing some engineering structures to provide additional safety and security of RW storage facilities during their dismantlement. Particular attention was paid to the problems associated with the use of special equipment.


2021 ◽  
Vol 2021 (1) ◽  
pp. 95-107
Author(s):  
Victoria Olegovna Zharkova ◽  
Yana Yuryevna Karasyova ◽  
Elena Iosifovna Lysakova ◽  
Elena Vasilievna Zakharova

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