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Some Comparisons of Measured and Predicted Primary Radiation Levels in the Aagesta Power Plant

Abstract

Neutron fluxes and gamma exposure rates in the primary shields of the Aagesta nuclear plant have been measured and the results compared with values predicted during shield design, and with values obtained later by the NRN bulk shielding code. The input data for the problems are given. The radial predictions are conservative by a factor of not more than 2 close to the reactor and by an unknown, higher factor further out. The conservatism is explainable by the differences between the true local conditions and core power distributions and those assumed in the predictions. The axial flux levels based on streaming calculations are found to agree quite well with the estimated values. The conservatism here is not so large and it seems to be necessary to be very careful when handling streaming problems. The experience gained shows that a power plant is less suitable for studying the accuracy of the shield design codes as such, but the practical results from the combined application of massive shield codes and void streaming predictions to complicated problems give information about the true degree of conservatism present.
Publication Date:
May 15, 1968
Product Type:
Technical Report
Report Number:
AE-325
Resource Relation:
Other Information: 8 refs., 11 figs., 6 tabs.
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; AGESTA REACTOR; SHIELDING; FORECASTING; COMPUTER CODES; ACCURACY; NEUTRON FLUX; GAMMA RADIATION
OSTI ID:
20956271
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0708705
Availability:
Commercial reproduction prohibited; OSTI as DE20956271
Submitting Site:
SWDN
Size:
48 pages
Announcement Date:
Dec 29, 2007

Citation Formats

Aalto, E, Sandlin, R, and Krell, Aa. Some Comparisons of Measured and Predicted Primary Radiation Levels in the Aagesta Power Plant. Sweden: N. p., 1968. Web.
Aalto, E, Sandlin, R, & Krell, Aa. Some Comparisons of Measured and Predicted Primary Radiation Levels in the Aagesta Power Plant. Sweden.
Aalto, E, Sandlin, R, and Krell, Aa. 1968. "Some Comparisons of Measured and Predicted Primary Radiation Levels in the Aagesta Power Plant." Sweden.
@misc{etde_20956271,
title = {Some Comparisons of Measured and Predicted Primary Radiation Levels in the Aagesta Power Plant}
author = {Aalto, E, Sandlin, R, and Krell, Aa}
abstractNote = {Neutron fluxes and gamma exposure rates in the primary shields of the Aagesta nuclear plant have been measured and the results compared with values predicted during shield design, and with values obtained later by the NRN bulk shielding code. The input data for the problems are given. The radial predictions are conservative by a factor of not more than 2 close to the reactor and by an unknown, higher factor further out. The conservatism is explainable by the differences between the true local conditions and core power distributions and those assumed in the predictions. The axial flux levels based on streaming calculations are found to agree quite well with the estimated values. The conservatism here is not so large and it seems to be necessary to be very careful when handling streaming problems. The experience gained shows that a power plant is less suitable for studying the accuracy of the shield design codes as such, but the practical results from the combined application of massive shield codes and void streaming predictions to complicated problems give information about the true degree of conservatism present.}
place = {Sweden}
year = {1968}
month = {May}
}