Buffer Moisture Protection System

Jouko Ritola, Jutta Peura

Research output: Book/ReportReportProfessional

Abstract

With the present knowledge, bentonite blocks have to be protected from the air relative humidity and from any moisture leakages in the environment that might cause swelling of the bentonite blocks during the "open" installation phase before backfilling. The purpose of this work was to design the structural reference solution both for the bottom of the deposition hole and for the buffer moisture protection and dewatering system with their integrated equipment needed in the deposition hole. This report describes the Posiva’s reference solution for the buffer moisture protection system and the bottom plate on basis of the demands and functional requirements set by long-term safety. The reference solution with structural details has been developed in research work made 2010–2011. The structural solution of the moisture protection system has not yet been tested in practice. On the bottom of the deposition hole a copper plate which protects the lowest bentonite block from the gathered water is installed straight to machined and even rock surface. The moisture protection sheet made of EPDM rubber is attached to the copper plate with an inflatable seal. The upper part of the moisture protection sheet is fixed to the collar structures of the lid which protects the deposition hole in the disposal tunnel. The main function of the moisture protection sheet is to protect bentonite blocks from the leaking water and from the influence of the air humidity at their installation stage. The leaking water is controlled by the dewatering and alarm system which has been integrated into the moisture protection liner.
Original languageEnglish
Place of PublicationOlkiluoto, Eurajoki
PublisherPosiva
Number of pages72
Publication statusPublished - 2013
MoE publication typeD4 Published development or research report or study

Publication series

NameWorking Report
PublisherPosiva Oy
No.2012-05

Fingerprint

moisture
bentonite
dewatering
copper
protection system
air
research work
liner
rubber
water
swelling
leakage
relative humidity
humidity
tunnel
safety
rock

Keywords

  • bentonite
  • buffwer
  • moisture protection
  • design
  • bottom structure
  • moisture protection sheet
  • dewatering
  • monitoring
  • alarm system

Cite this

Ritola, J., & Peura, J. (2013). Buffer Moisture Protection System. Olkiluoto, Eurajoki: Posiva . Working Report, No. 2012-05
Ritola, Jouko ; Peura, Jutta. / Buffer Moisture Protection System. Olkiluoto, Eurajoki : Posiva , 2013. 72 p. (Working Report; No. 2012-05).
@book{61ae9b2fcfd241dfa3e929a009dcd7a3,
title = "Buffer Moisture Protection System",
abstract = "With the present knowledge, bentonite blocks have to be protected from the air relative humidity and from any moisture leakages in the environment that might cause swelling of the bentonite blocks during the {"}open{"} installation phase before backfilling. The purpose of this work was to design the structural reference solution both for the bottom of the deposition hole and for the buffer moisture protection and dewatering system with their integrated equipment needed in the deposition hole. This report describes the Posiva’s reference solution for the buffer moisture protection system and the bottom plate on basis of the demands and functional requirements set by long-term safety. The reference solution with structural details has been developed in research work made 2010–2011. The structural solution of the moisture protection system has not yet been tested in practice. On the bottom of the deposition hole a copper plate which protects the lowest bentonite block from the gathered water is installed straight to machined and even rock surface. The moisture protection sheet made of EPDM rubber is attached to the copper plate with an inflatable seal. The upper part of the moisture protection sheet is fixed to the collar structures of the lid which protects the deposition hole in the disposal tunnel. The main function of the moisture protection sheet is to protect bentonite blocks from the leaking water and from the influence of the air humidity at their installation stage. The leaking water is controlled by the dewatering and alarm system which has been integrated into the moisture protection liner.",
keywords = "bentonite, buffwer, moisture protection, design, bottom structure, moisture protection sheet, dewatering, monitoring, alarm system",
author = "Jouko Ritola and Jutta Peura",
year = "2013",
language = "English",
series = "Working Report",
publisher = "Posiva",
number = "2012-05",
address = "Finland",

}

Ritola, J & Peura, J 2013, Buffer Moisture Protection System. Working Report, no. 2012-05, Posiva , Olkiluoto, Eurajoki.

Buffer Moisture Protection System. / Ritola, Jouko; Peura, Jutta.

Olkiluoto, Eurajoki : Posiva , 2013. 72 p. (Working Report; No. 2012-05).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Buffer Moisture Protection System

AU - Ritola, Jouko

AU - Peura, Jutta

PY - 2013

Y1 - 2013

N2 - With the present knowledge, bentonite blocks have to be protected from the air relative humidity and from any moisture leakages in the environment that might cause swelling of the bentonite blocks during the "open" installation phase before backfilling. The purpose of this work was to design the structural reference solution both for the bottom of the deposition hole and for the buffer moisture protection and dewatering system with their integrated equipment needed in the deposition hole. This report describes the Posiva’s reference solution for the buffer moisture protection system and the bottom plate on basis of the demands and functional requirements set by long-term safety. The reference solution with structural details has been developed in research work made 2010–2011. The structural solution of the moisture protection system has not yet been tested in practice. On the bottom of the deposition hole a copper plate which protects the lowest bentonite block from the gathered water is installed straight to machined and even rock surface. The moisture protection sheet made of EPDM rubber is attached to the copper plate with an inflatable seal. The upper part of the moisture protection sheet is fixed to the collar structures of the lid which protects the deposition hole in the disposal tunnel. The main function of the moisture protection sheet is to protect bentonite blocks from the leaking water and from the influence of the air humidity at their installation stage. The leaking water is controlled by the dewatering and alarm system which has been integrated into the moisture protection liner.

AB - With the present knowledge, bentonite blocks have to be protected from the air relative humidity and from any moisture leakages in the environment that might cause swelling of the bentonite blocks during the "open" installation phase before backfilling. The purpose of this work was to design the structural reference solution both for the bottom of the deposition hole and for the buffer moisture protection and dewatering system with their integrated equipment needed in the deposition hole. This report describes the Posiva’s reference solution for the buffer moisture protection system and the bottom plate on basis of the demands and functional requirements set by long-term safety. The reference solution with structural details has been developed in research work made 2010–2011. The structural solution of the moisture protection system has not yet been tested in practice. On the bottom of the deposition hole a copper plate which protects the lowest bentonite block from the gathered water is installed straight to machined and even rock surface. The moisture protection sheet made of EPDM rubber is attached to the copper plate with an inflatable seal. The upper part of the moisture protection sheet is fixed to the collar structures of the lid which protects the deposition hole in the disposal tunnel. The main function of the moisture protection sheet is to protect bentonite blocks from the leaking water and from the influence of the air humidity at their installation stage. The leaking water is controlled by the dewatering and alarm system which has been integrated into the moisture protection liner.

KW - bentonite

KW - buffwer

KW - moisture protection

KW - design

KW - bottom structure

KW - moisture protection sheet

KW - dewatering

KW - monitoring

KW - alarm system

M3 - Report

T3 - Working Report

BT - Buffer Moisture Protection System

PB - Posiva

CY - Olkiluoto, Eurajoki

ER -

Ritola J, Peura J. Buffer Moisture Protection System. Olkiluoto, Eurajoki: Posiva , 2013. 72 p. (Working Report; No. 2012-05).