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Safety case for the disposal of spent nuclear fuel at Olkiluoto. Complementary considerations 2012

Abstract

Complementary Considerations sits within Posiva Oy's Safety Case 'TURVA-2012' report portfolio and has the objective of enhancing confidence in the outcomes of the safety assessment for a spent nuclear fuel repository to be constructed at Olkiluoto, Finland. The main emphasis in this report is on the evidence and understanding that can be gained from observations at the site, including its regional geological environment, and from natural and anthropogenic analogues for the repository, its components and the processes that affect safety. In particular, the report addresses diverse and less quantifiable types of evidence and arguments that are enclosed to enhance confidence in the outcome of the safety assessment. These complementary considerations have been described as evaluations, evidence and qualitative supporting arguments that lie outside the scope of the other reports of the quantitative safety assessment. The experience with natural analogues for the long-term durability of the materials involved and the extent of processes provides high confidence in our understanding of the disposal system and its evolution. For each engineered barrier and key process, there is increasing analogue evidence to support the conceptual models and parameters. Regarding the suitability of the Olkiluoto site to host a spent fuel repository, a number of  More>>
Publication Date:
Dec 15, 2012
Product Type:
Technical Report
Report Number:
POSIVA-12-11
Resource Relation:
Other Information: 472 refs.
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; RADIOACTIVE WASTE DISPOSAL; UNDERGROUND DISPOSAL; SPENT FUELS; SAFETY ANALYSIS; RISK ASSESSMENT; SITE CHARACTERIZATION; GEOLOGY; NATURAL ANALOGUE; STABILITY; HYDROLOGY; BASEMENT ROCK
OSTI ID:
22134703
Research Organizations:
Posiva Oy, Helsinki (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ISBN 978-951-652-192-6; TRN: FI1304048
Availability:
Commercial reproduction prohibited. Available from ETDE as OSTI ID: 22134703; Available also in fulltext at http://www.posiva.fi or as a soft back edition
Submitting Site:
FIN
Size:
262 page(s)
Announcement Date:
Oct 03, 2013

Citation Formats

None. Safety case for the disposal of spent nuclear fuel at Olkiluoto. Complementary considerations 2012. Finland: N. p., 2012. Web.
None. Safety case for the disposal of spent nuclear fuel at Olkiluoto. Complementary considerations 2012. Finland.
None. 2012. "Safety case for the disposal of spent nuclear fuel at Olkiluoto. Complementary considerations 2012." Finland.
@misc{etde_22134703,
title = {Safety case for the disposal of spent nuclear fuel at Olkiluoto. Complementary considerations 2012}
author = {None}
abstractNote = {Complementary Considerations sits within Posiva Oy's Safety Case 'TURVA-2012' report portfolio and has the objective of enhancing confidence in the outcomes of the safety assessment for a spent nuclear fuel repository to be constructed at Olkiluoto, Finland. The main emphasis in this report is on the evidence and understanding that can be gained from observations at the site, including its regional geological environment, and from natural and anthropogenic analogues for the repository, its components and the processes that affect safety. In particular, the report addresses diverse and less quantifiable types of evidence and arguments that are enclosed to enhance confidence in the outcome of the safety assessment. These complementary considerations have been described as evaluations, evidence and qualitative supporting arguments that lie outside the scope of the other reports of the quantitative safety assessment. The experience with natural analogues for the long-term durability of the materials involved and the extent of processes provides high confidence in our understanding of the disposal system and its evolution. For each engineered barrier and key process, there is increasing analogue evidence to support the conceptual models and parameters. Regarding the suitability of the Olkiluoto site to host a spent fuel repository, a number of factors have been identified that indicate the suitability of crystalline host rock in general, and that of the Olkiluoto site in particular. The report also provides radiation background information for the use of complementary indicators, which aid in putting the results of the safety analysis presented in Assessment of Radionuclide Release Scenarios for the Repository System and Biosphere Assessment in a broader perspective to show that the radiation originating from a spent nuclear fuel repository remains in most cases much below natural background radiation or that caused by non-nuclear industries. (orig.)}
place = {Finland}
year = {2012}
month = {Dec}
}