caa a22 4500 463215478 CHVBK 20180405153155.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s00339-007-3883-2 doi (NATIONALLICENCE)springer-10.1007/s00339-007-3883-2 Stored energy release behaviour of disordered carbon [Elektronische Daten] [K. Dasgupta, P. Barat, A. Sarkar, P. Mukherjee, D. Sathiyamoorthy] The use of graphite as a moderator in a low temperature thermal nuclear reactor is restricted due to accumulation of energy caused by displacement of atoms by neutrons and high energetic particles. Thermal transients may lead to a release of stored energy that may raise the temperature of the fuel clad above the design limit. Disordered carbon is thought to be an alternative choice for this purpose. Two types of disordered carbon composites, namely, CB (made up of 15wt. % carbon black dispersed in carbonized phenolic resin) and PAN (made up of 20vol. % chopped polyacrylonitrile carbon fibre dispersed in carbonized phenolic resin matrix) have been irradiated with 145MeV Ne6+ ions at three fluence levels of 1.0×1013, 5.0×1013 and 1.5×1014 Ne6+/cm2, respectively. The XRD patterns revealed that both the samples remained disordered even after irradiation. The maximum release of stored energy for CB was 212J/g and that of PAN was 906J/g. For CB, the release of stored energy was a first order reaction with activation energy of 2.79eV and a frequency factor of 3.72×1028 per second. 13% of the defects got annealed by heating up to 700°C. PAN showed a third-order release rate with activation energy of 1.69eV and a frequency factor of 1.77×1014 per second. 56% of the total defects got annealed by heating it up to 700°C. CB seems to be the better choice than PAN as it showed less energy release with a slower rate. Springer-Verlag, 2007 Dasgupta K. Powder Metallurgy Division, BARC, 400085, Mumbai, India aut Barat P. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700064, Kolkata, India aut Sarkar A. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700064, Kolkata, India aut Mukherjee P. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700064, Kolkata, India aut Sathiyamoorthy D. Powder Metallurgy Division, BARC, 400085, Mumbai, India aut Applied Physics A Springer-Verlag 87/4(2007-06-01), 721-726 0947-8396 87:4<721 2007 87 339 https://doi.org/10.1007/s00339-007-3883-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-3883-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dasgupta K. Powder Metallurgy Division, BARC, 400085, Mumbai, India aut NATIONALLICENCE 700 1- Barat P. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700064, Kolkata, India aut NATIONALLICENCE 700 1- Sarkar A. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700064, Kolkata, India aut NATIONALLICENCE 700 1- Mukherjee P. Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, 700064, Kolkata, India aut NATIONALLICENCE 700 1- Sathiyamoorthy D. Powder Metallurgy Division, BARC, 400085, Mumbai, India aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 87/4(2007-06-01), 721-726 0947-8396 87:4<721 2007 87 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer