It has been called to my attention that the initial core inventory of yield of Cs-136 (169 MCi) as calculated by the British codes CACHE and WIMS (see section VI.2.2. "Chornobyl Unit-4 Core Inventory Calculation") is seriously... more
It has been called to my attention that the initial core inventory of yield of Cs-136 (169 MCi) as calculated by the British codes CACHE and WIMS (see section VI.2.2. "Chornobyl Unit-4 Core Inventory Calculation") is seriously in error. 1 Upon investigation, it appears the source of the error is in the codes: because Cs-136 is a special case (so-called shielded nuclide) and comes largely from the activation of Cs-135, only.a small contribution arises from fission. Apparently, the codes do not take this into account. Using the cumulative fission yield of the 136 mass chain yields an incorrect result since the chain terminates at the stable nuclide Xe-136 that, of course, does not decay to Cs-136. The initial inventory of Cs-136 in previous studies is estimated to be in the range of 2.2 to 3.6 MCi, so that a relatively good estimate should be about 3.0 MCi. It should also be noted that the assumption implied by the table that 1-131 and 1-133 have the same fractional release ...
a Música Diretoria é de autoria de MC Sapão, mas na época muitas versões surgiram quase que ao mesmo tempo de sua criação, MC Primo em Sâo Paulo fez a sua. "varios mcs começam a cantar ao mesmo tempo, pois as letras nascem organicamente... more
a Música Diretoria é de autoria de MC Sapão, mas na época muitas versões surgiram quase que ao mesmo tempo de sua criação, MC Primo em Sâo Paulo fez a sua. "varios mcs começam a cantar ao mesmo tempo, pois as letras nascem organicamente nos bailes" (MALTA, 2014)
