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INDC(SEC)-46/U+R+F+SIN DC INTERNATIONAL NUCLEAR DATA ...

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I. ii<br />

II. B.<br />

Supplementary information from contributors<br />

[ Requestors and national data committees<br />

sometimes supply supplementary information about<br />

the requests for which they are responsible.<br />

The remarks which follow were received from<br />

the USSR.]<br />

General comments to the Soviet Requests<br />

L.N. Usachev's requests<br />

Together all the requests make a unique system of<br />

requirements for the accuracy of evaluated nuclear data<br />

which would assure calculation of K^^, and breeding ratio (BR)<br />

of a fast plutonium breeder with accuracies of lfo ajid 2$<br />

respectively.<br />

Priorities<br />

Accuracy requirements designated 2nd priority would<br />

assure the necessary calculational accuracy on the basis<br />

only of microscopic data without the use of data from<br />

integral experiments.<br />

Accuracy requirements of designated 1st priority are<br />

less stringent because use would be made of evaluated results<br />

from integral experiments, which are available at the Nuclear<br />

Data Centre in Obninsk.<br />

Meaning of uncertainty<br />

Uncertainty (or accuracy) is characterized by one<br />

standard deviation.

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