Abstract
Measurements of neutron and gamma-ray dose-rates made outside a TN-12 flask loaded with 12 PWR fuel elements were chosen as an experimental benchmark for the NEACRP Intercomparison of Codes. The results of calculations carried out by eight participants are compared with the measured dose-rates. The agreement is mostly very good for the dose-points at the mid-height of the flask, although at positions opposite the top and bottom of the fuel there are bigger discrepancies. The latter are attributed to the greater uncertainties in defining the sources and the shield materials in these regions. The study demonstrated the need to use an accurate response function for the dosimeter rather than assuming it to have a true dose response. One area of inconsistency in the conclusions drawn by participants was in the need for explicit modelling of the copper fins on the outside of the steel flask. Further work is needed to resolve this. Overall the comparison shows that the methods of calculation are accurate in most cases, and gives confidence in their application to flask design.
Citation Formats
Locke, H F.
Summary of the results of the comparison of calculations and measurements for the TN12 flask carried out under the NEACRP intercomparison of shielding codes.
NEA: N. p.,
1992.
Web.
Locke, H F.
Summary of the results of the comparison of calculations and measurements for the TN12 flask carried out under the NEACRP intercomparison of shielding codes.
NEA.
Locke, H F.
1992.
"Summary of the results of the comparison of calculations and measurements for the TN12 flask carried out under the NEACRP intercomparison of shielding codes."
NEA.
@misc{etde_10153303,
title = {Summary of the results of the comparison of calculations and measurements for the TN12 flask carried out under the NEACRP intercomparison of shielding codes}
author = {Locke, H F}
abstractNote = {Measurements of neutron and gamma-ray dose-rates made outside a TN-12 flask loaded with 12 PWR fuel elements were chosen as an experimental benchmark for the NEACRP Intercomparison of Codes. The results of calculations carried out by eight participants are compared with the measured dose-rates. The agreement is mostly very good for the dose-points at the mid-height of the flask, although at positions opposite the top and bottom of the fuel there are bigger discrepancies. The latter are attributed to the greater uncertainties in defining the sources and the shield materials in these regions. The study demonstrated the need to use an accurate response function for the dosimeter rather than assuming it to have a true dose response. One area of inconsistency in the conclusions drawn by participants was in the need for explicit modelling of the copper fins on the outside of the steel flask. Further work is needed to resolve this. Overall the comparison shows that the methods of calculation are accurate in most cases, and gives confidence in their application to flask design.}
place = {NEA}
year = {1992}
month = {Mar}
}
title = {Summary of the results of the comparison of calculations and measurements for the TN12 flask carried out under the NEACRP intercomparison of shielding codes}
author = {Locke, H F}
abstractNote = {Measurements of neutron and gamma-ray dose-rates made outside a TN-12 flask loaded with 12 PWR fuel elements were chosen as an experimental benchmark for the NEACRP Intercomparison of Codes. The results of calculations carried out by eight participants are compared with the measured dose-rates. The agreement is mostly very good for the dose-points at the mid-height of the flask, although at positions opposite the top and bottom of the fuel there are bigger discrepancies. The latter are attributed to the greater uncertainties in defining the sources and the shield materials in these regions. The study demonstrated the need to use an accurate response function for the dosimeter rather than assuming it to have a true dose response. One area of inconsistency in the conclusions drawn by participants was in the need for explicit modelling of the copper fins on the outside of the steel flask. Further work is needed to resolve this. Overall the comparison shows that the methods of calculation are accurate in most cases, and gives confidence in their application to flask design.}
place = {NEA}
year = {1992}
month = {Mar}
}