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Guidance on the Implementation of Modifications to Mitigate Beyond Design Basis Accidents

Abstract

Following the events at Fukushima, Canadian Nuclear Power Plants (NPP) procured equipment and initiated modifications to improve response capability for Beyond Design Basis Accidents (BDBA). These changes were not typical of other design modifications to the nuclear power plants and reinforced the need for additional guidance for modifications to address BDBA. This paper describes the guidance that was developed to guide the design, procurement, installation, operation, and maintenance of equipment and modifications to mitigate BDBAs. The guidance developed prescribes a graded approach based on a categorization of the nature of the modification. Four categories of modifications are introduced, with the distinction being the degree of interface with existing design basis systems, structures and components (SSCs). This has resulted in a cost-effective means of implementing additional capability to mitigate BDBA conditions, and yet ensure the design basis capability of SSCs is maintained. (author)
Authors:
Dermarkar, F.; Marczak, J.; O’Neill, M., E-mail: fred.dermarkar@opg.com [1] 
  1. Ontario Power Generation, Pickering, Ontario (Canada)
Publication Date:
Oct 15, 2014
Product Type:
Conference
Report Number:
IAEA-TECDOC-CD-1749
Resource Relation:
Conference: 5. International Conference on Topical Issues in Nuclear Installation Safety: Defence in Depth - Advances and Challenges for Nuclear Installation Safety, Vienna (Austria), 21-24 Oct 2013; Other Information: 6 refs., 1 fig.; Related Information: In: International Conference on Topical Issues in Nuclear Installation Safety: Defence in Depth — Advances and Challenges for Nuclear Installation Safety. Proceedings of an International Conference held in Vienna, Austria, 21-24 October 2013| 353 p.
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; CANADA; DESIGN; DESIGN BASIS ACCIDENTS; MAINTENANCE; MODIFICATIONS; NUCLEAR POWER PLANTS; OPERATION; PROCUREMENT; REACTOR COMPONENTS
OSTI ID:
22318514
Research Organizations:
International Atomic Energy Agency, Safety Assessment Section, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISBN 978-92-0-158214-0; ISSN 1684-2073; TRN: XA14M7030024711
Availability:
Available from INIS in electronic form. Also available on-line: http://www-pub.iaea.org/MTCD/publications/PDF/TE-1749_CD_web.pdf and on 1 CD-ROM from IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books
Submitting Site:
INIS
Size:
page(s) 88-95
Announcement Date:
Mar 21, 2015

Citation Formats

Dermarkar, F., Marczak, J., and O’Neill, M., E-mail: fred.dermarkar@opg.com. Guidance on the Implementation of Modifications to Mitigate Beyond Design Basis Accidents. IAEA: N. p., 2014. Web.
Dermarkar, F., Marczak, J., & O’Neill, M., E-mail: fred.dermarkar@opg.com. Guidance on the Implementation of Modifications to Mitigate Beyond Design Basis Accidents. IAEA.
Dermarkar, F., Marczak, J., and O’Neill, M., E-mail: fred.dermarkar@opg.com. 2014. "Guidance on the Implementation of Modifications to Mitigate Beyond Design Basis Accidents." IAEA.
@misc{etde_22318514,
title = {Guidance on the Implementation of Modifications to Mitigate Beyond Design Basis Accidents}
author = {Dermarkar, F., Marczak, J., and O’Neill, M., E-mail: fred.dermarkar@opg.com}
abstractNote = {Following the events at Fukushima, Canadian Nuclear Power Plants (NPP) procured equipment and initiated modifications to improve response capability for Beyond Design Basis Accidents (BDBA). These changes were not typical of other design modifications to the nuclear power plants and reinforced the need for additional guidance for modifications to address BDBA. This paper describes the guidance that was developed to guide the design, procurement, installation, operation, and maintenance of equipment and modifications to mitigate BDBAs. The guidance developed prescribes a graded approach based on a categorization of the nature of the modification. Four categories of modifications are introduced, with the distinction being the degree of interface with existing design basis systems, structures and components (SSCs). This has resulted in a cost-effective means of implementing additional capability to mitigate BDBA conditions, and yet ensure the design basis capability of SSCs is maintained. (author)}
place = {IAEA}
year = {2014}
month = {Oct}
}