SYMPOSIA PAPER Published: 01 January 1998

Small Specimen Testing Applied at Surveillance Extension


The WWER-440 V-213 type RPVs are equipped with the surveillance specimens used to predict the embrittlement of the RPV material. These specimens are located near the core, resulting in accelerated irradiation. After four years of operation only one overexposed set remains in each unit. To obtain a more extensive database for life time calculation and life time management, a new, more extended surveillance program has been elaborated and implemented. Due to the limited availability of archive materials reconstructed Charpy V specimens and small size smooth and notched tensile bars were used in the program. To develop this surveillance extension, an extensive laboratory study on use of reconstructed Charpy and subsize tensile specimens was performed. Methods for K1a measurements on small size specimens were also studied.

Author Information

Czoboly, E
Atomic Energy Research Institute, Hungary
Gillemot, F
Atomic Energy Research Institute, Hungary
Oszwald, F
Head of Testing Lab. Nuclear Power Plant Paks, Paks, Hungary
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Developed by Committee: E10
Pages: 163–172
DOI: 10.1520/STP37990S
ISBN-EB: 978-0-8031-5565-7
ISBN-13: 978-0-8031-2476-9