Topical Issues in
Nuclear
Installation Safety
Safety Demonstration of Advanced
Water Cooled Nuclear Power Plants
Proceedings of an International Conference
6–9 June 2017, Vienna, Austria
IAEA Library Cataloguing in Publication Data
Names: International Atomic Energy Agency.
Title: Topical issues in nuclear installation safety / International Atomic Energy Agency.
Description: Vienna : International Atomic Energy Agency, 2018. | Series: Proceedings
series (International Atomic Energy Agency), ISSN 0074–1884 | Includes bibliographical
references.
Identifiers: IAEAL 18-01171 | ISBN 978–92–0–104618–5 (paperback : alk. paper)
Subjects: LCSH: Nuclear reactors — Safety measures — Congresses. | Nuclear reactors —
Design and construction. | Reliability (Engineering)
Classification: UDC 621.039.58 | STI/PUB/1829.
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BEPU and Safety Margins in Nuclear Reactor Safety
F. D’Auria, H. Glaeser, N. Debrecin
BEPU AND SAFETY MARGINS IN NUCLEAR REACTOR SAFETY
F. D’AURIA
University of Pisa (DESTEC/GRNSPG Pisa, Italy Email: f.dauria@ing.unipi.it H. GLAESER Consultant, Eching, Germany N. DEBRECIN
University of Zagreb (FEEC) Zagreb, Croatia
Abstract
Approaches like Best Estimate Plus Uncertainty (BEPU) and concepts like Safety Margins (SM) are well established in Nuclear Reactor Safety (NRS). However continuous improvements in analytical techniques and in the sophistication of hardware products do not necessarily correspond to new industrial applications within Nuclear Power Plants (NPP) technology.
The declining condition for nuclear technology also contributes to the lag between developments and
applications definitely causing NPP safety at a level below the achievable level. The possibility to extend BEPU to all areas of the Final Safety Analysis Report (FSAR), so-called BEPU-FSAR is outlined in the paper. This should be combined with the Extension of the SM concept (E-SM). BEPU-FSAR techniques may be at the origin of E-SM which also will need specific monitoring hardware. All of this may open new horizons for NRS and for acceptance of NPP by the public and the decisions makers. The paper describes recent
accomplishments in the areas of BEPU and E-SM.