Results 241 to 250 of about 8,764,696 (266)

Improvement of fuel burn-up fraction in a tokamak reactor by installing a palladium-alloy membrane

Nuclear Fusion, 1981
The possibility of improving the fuel burn-up fraction (of reducing the pumped-out fraction) by installing a palladium-alloy membrane on the duct region of the main evacuating system is investigated. The emphasis is mainly placed on a tokamak reactor with a divertor. It is shown that the burn-up fraction can be improved by a factor of three to four.
M. Sugihara, T. Abe
exaly   +2 more sources

Stromal vascular fraction improves deep partial thickness burn wound healing

Burns, 2014
Objective: The practice of early burn wound excision and wound closure by immediate autologous skin or skin substitutes is the preferred treatment in extensive deep partial and full-thickness burns.
Kemal Deniz, Atilla Çoruh
exaly   +2 more sources

Experiment on the increase of the burn-up fraction of fuel assemblies in VV�R-440 reactor

Soviet Atomic Energy, 1986
The rated fuel lifetime in a standard VVER-440 reactor includes three partial fuel rechargings). One way of intensifying the fuel use is to increase the number of partial reactor rechargings with a simultaneous increase of the full fuel lifetime. This mode of fuel use makes it possible to raise the fuel burn-up fraction. Two conditions, however, should
E. I. Ignatenko, A. A. Matveev, Yu. N. Pytkin, M. V. Panin, V. A. Voznesenskii, V. N. Proselkov   +5 more
openaire   +1 more source

Fuel burn-up fraction in RBMK-1000 reactor

Soviet Atomic Energy, 1986
The authors calculate fuel burnup fractions for the four RBMK reactors of the Leningrad plant for both unloaded and loaded fuel and graph the predicted dependence of average burnup for both scenarios on reactor operation time, the distribution function for a steady-state mode of continuous fuel recharging, and a histogram of fuel element distribution ...
A. P. Eperin, V. S. Romanenko, A. V. Zav'yalov, A. V. Krayushkin, Yu. V. Garusov, G. F. Yaroslavtsev, M. V. Shavlov   +6 more
openaire   +1 more source

Instant release fraction and matrix release of high burn-up UO2 spent nuclear fuel: Effect of high burn-up structure and leaching solution composition

Journal of Nuclear Materials, 2012
Abstract Two weak points in Performance Assessment (PA) exercises regarding the alteration of Spent Nuclear Fuel (SNF) are the contribution of the so-called Instant Release Fraction (IRF) and the effect of High Burn-Up Structure (HBS). This manuscript focuses on the effect of HBS in matrix (long term) and instant release of a Pressurised Water ...
D. Serrano-Purroy, F. Clarens, E. González-Robles, J.P. Glatz, D.H. Wegen, J. de Pablo, I. Casas, J. Giménez, A. Martínez-Esparza   +8 more
openaire   +1 more source

Effects of matrix composition on instant release fractions from high burn-up nuclear fuel

MRS Proceedings, 2013
ABSTRACTThe release of radionuclides from spent nuclear fuel in contact with water is controlled by two processes – the dissolution of the UO2grains and the rapid release of fission products segregated either to the gap between the fuel and the cladding or to the UO2grain boundaries.
Olivia Roth, Jeanett Low, Michael Granfors, Kastriot Spahiu   +3 more
openaire   +1 more source

Effect of Fuel Fraction on Small Modified CANDLE Burn-up Based Gas Cooled Fast Reactors

AIP Conference Proceedings, 2010
A conceptual design study of Gas Cooled Fast Reactors with Modified CANDLE Burn‐up has been performed. The objective of this research is to get optimal design parameters of such type reactors. The parameters of nuclear design including the critical condition, conversion ratio, and burn‐up level were compared.
Menik Ariani, Zaki Su’ud, Abdul Waris, null Khairurrijal, Nur Asiah, M. Ali Shafii, null Khairurrijal, Mikrajuddin Abdullah, Wahyu Srigutomo, Sparisoma Viridi, null Novitrian   +10 more
openaire   +1 more source

RN Fractional Release of High Burn-Up Fuel: Effect of HBS and Estimation of Accessible Grain Boundary

MRS Proceedings, 2008
AbstractThe so-called Instant Release Fraction (IRF) is considered to govern the dose released from Spent Fuel repositories. Often, IRF calculations are based on estimations of fractions of inventory release based in fission gas release [1]. The IRF definition includes the inventory located within the Gap although a conservative approach also includes ...
F. Clarens, D. Serrano-Purroy, A. Martínez-Esparza, D. Wegen, E. Gonzalez-Robles, J. de Pablo, I Casas, J. Giménez, B. Christiansen, J.P. Glatz   +9 more
openaire   +1 more source

Burn severity mapping from Landsat MESMA fraction images and Land Surface Temperature [PDF]

Remote Sensing of Environment, 2017
14 p.Forest fires are incidents of great importance in Mediterranean environments. Landsat data have proven to be suitable for evaluating post-fire vegetation damage and determining different levels of burn severity, which is crucial for planning post ...
Carmen Quintano Pastor, Dar A. Roberts, Alfonso Fernández-Manso   +2 more
exaly   +1 more source

Leaching behaviour of medium and high burn-up spent UOX and (U, Pu)OX fuels under anoxic and reducing conditions – Release of fission gases and their impact on the instant release fraction and matrix dissolution

Several countries worldwide foresee the direct disposal of spent nuclear fuel (SNF) in deep geological formations combined with a resilient multi-barrier concept, in order to safely isolate and confine the highly radioactive waste from the biosphere.
Tobias König, Roberto Gaggiano, Michel Herm, Katrien Meert, Volker Metz, Arndt Walschburger, Horst Geckeis   +6 more
openaire   +1 more source