Study on safety margins assessment practices

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

This study concerns Finnish safety factor definitions applied to structural integrity analyses of nuclear power plant (NPP) piping components. On global level, International Atomic Energy Agency (IAEA) provides information and definitions on safety margins and safety factors of NPP components. In Finland, the significant documents concerning the safety factors of NPP components are YVL Guides. However, they do not give the actual safety factor data, but instead refer to certain applicable standards. These are mainly ASME code Sections III and XI. Both deterministic and probabilistic crack growth analyses were performed for two representative BWR piping components. For comparison purposes, the analyses were carried out both with and without safety factors. Due to various kinds of safety factors and conservative assumptions, it is difficult/ impossible to define what is the total safety margin of a structure or component. Structural integrity analyses of structures and components would benefit from such more specific definitions of safety factors that would give a more accurate assessment of the total safety.
Original languageEnglish
Title of host publicationBaltica X
Subtitle of host publicationInternational Conference on Life Management and Maintenance for Power Plants
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages15
ISBN (Electronic)978-951-38-8436-9, 978-951-38-8435-2
Publication statusPublished - 2016
MoE publication typeA4 Article in a conference publication
EventBALTICA X - International Conference on Life Management and Maintenance for Power Plants - Cruise, Helsinki-Stockholm, Finland
Duration: 7 Jun 20169 Jun 2016

Publication series

NameVTT Technology
PublisherVTT
Volume261
ISSN (Print)2242-122X

Conference

ConferenceBALTICA X - International Conference on Life Management and Maintenance for Power Plants
Abbreviated titleBaltica X
CountryFinland
CityHelsinki-Stockholm
Period7/06/169/06/16

Fingerprint

Safety factor
Nuclear power plants
Structural integrity
Nuclear energy
Crack propagation

Cite this

Cronvall, O. (2016). Study on safety margins assessment practices. In Baltica X: International Conference on Life Management and Maintenance for Power Plants Espoo: VTT Technical Research Centre of Finland. VTT Technology, Vol.. 261
Cronvall, Otso. / Study on safety margins assessment practices. Baltica X: International Conference on Life Management and Maintenance for Power Plants. Espoo : VTT Technical Research Centre of Finland, 2016. (VTT Technology, Vol. 261).
@inproceedings{2e3f648dfe2d48d99168e6709ffad672,
title = "Study on safety margins assessment practices",
abstract = "This study concerns Finnish safety factor definitions applied to structural integrity analyses of nuclear power plant (NPP) piping components. On global level, International Atomic Energy Agency (IAEA) provides information and definitions on safety margins and safety factors of NPP components. In Finland, the significant documents concerning the safety factors of NPP components are YVL Guides. However, they do not give the actual safety factor data, but instead refer to certain applicable standards. These are mainly ASME code Sections III and XI. Both deterministic and probabilistic crack growth analyses were performed for two representative BWR piping components. For comparison purposes, the analyses were carried out both with and without safety factors. Due to various kinds of safety factors and conservative assumptions, it is difficult/ impossible to define what is the total safety margin of a structure or component. Structural integrity analyses of structures and components would benefit from such more specific definitions of safety factors that would give a more accurate assessment of the total safety.",
author = "Otso Cronvall",
year = "2016",
language = "English",
series = "VTT Technology",
publisher = "VTT Technical Research Centre of Finland",
booktitle = "Baltica X",
address = "Finland",

}

Cronvall, O 2016, Study on safety margins assessment practices. in Baltica X: International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland, Espoo, VTT Technology, vol. 261, BALTICA X - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 7/06/16.

Study on safety margins assessment practices. / Cronvall, Otso.

Baltica X: International Conference on Life Management and Maintenance for Power Plants. Espoo : VTT Technical Research Centre of Finland, 2016. (VTT Technology, Vol. 261).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Study on safety margins assessment practices

AU - Cronvall, Otso

PY - 2016

Y1 - 2016

N2 - This study concerns Finnish safety factor definitions applied to structural integrity analyses of nuclear power plant (NPP) piping components. On global level, International Atomic Energy Agency (IAEA) provides information and definitions on safety margins and safety factors of NPP components. In Finland, the significant documents concerning the safety factors of NPP components are YVL Guides. However, they do not give the actual safety factor data, but instead refer to certain applicable standards. These are mainly ASME code Sections III and XI. Both deterministic and probabilistic crack growth analyses were performed for two representative BWR piping components. For comparison purposes, the analyses were carried out both with and without safety factors. Due to various kinds of safety factors and conservative assumptions, it is difficult/ impossible to define what is the total safety margin of a structure or component. Structural integrity analyses of structures and components would benefit from such more specific definitions of safety factors that would give a more accurate assessment of the total safety.

AB - This study concerns Finnish safety factor definitions applied to structural integrity analyses of nuclear power plant (NPP) piping components. On global level, International Atomic Energy Agency (IAEA) provides information and definitions on safety margins and safety factors of NPP components. In Finland, the significant documents concerning the safety factors of NPP components are YVL Guides. However, they do not give the actual safety factor data, but instead refer to certain applicable standards. These are mainly ASME code Sections III and XI. Both deterministic and probabilistic crack growth analyses were performed for two representative BWR piping components. For comparison purposes, the analyses were carried out both with and without safety factors. Due to various kinds of safety factors and conservative assumptions, it is difficult/ impossible to define what is the total safety margin of a structure or component. Structural integrity analyses of structures and components would benefit from such more specific definitions of safety factors that would give a more accurate assessment of the total safety.

M3 - Conference article in proceedings

T3 - VTT Technology

BT - Baltica X

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Cronvall O. Study on safety margins assessment practices. In Baltica X: International Conference on Life Management and Maintenance for Power Plants. Espoo: VTT Technical Research Centre of Finland. 2016. (VTT Technology, Vol. 261).