SYMPOSIA PAPER Published: 01 January 1994

Koeberg Surveillance Capsule Fluence Determination Using PCDC Dosimetry Cross Sections and Activation Measurements


Neutron fluences were calculated for the first Reactor Vessel Surveillance (RVS) capsules extracted from Koeberg Unit 1 and 2. For the calculation of the Koeberg RVS-capsule dosimetry cross sections a calculational system (called PCDC) was developed on a 32-bit i386/i486 personal computer (PC). This system consists of pre- and post-processors, a 171-group neutron reaction cross section library, a 171-group reactor zone flux spectrum library and an interface with the SAND-II, DOSCROS-84 and IRDF-90 dosimetry libraries. The sensitivity of these cross sections was determined for different reactor model parameters, core conditions and dosimetry libraries. Using the IRDF-90 dosimetry library, a maximum difference of 15% was obtained between the fluences predicted with the non-fissionable dosimeters.

Author Information

Stoker, CC
Atomic Energy Corporation of South Africa Ltd. (AEC), Pretoria, South Africa
Reitsma, F
Atomic Energy Corporation of South Africa Ltd. (AEC), Pretoria, South Africa
Lamparelli, G
ESKOM, Johannesburg, South Africa
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Developed by Committee: E10
Pages: 155–164
DOI: 10.1520/STP15108S
ISBN-EB: 978-0-8031-5281-6
ISBN-13: 978-0-8031-1899-7