Topical at research
Three drilling holes made during summer
This past summer saw the making of three drilling holes at Olkiluoto. OL-KR51 reached 650 metres, OL-KR52 427 metres and OL-KR53 300 metres below the ground.
24.07.2009 New drilling holes at Olkiluoto
During the summer two new drilling holes have been made at Olkiluoto.
06.07.2009 Corrosion resistance of disposal canister
The canister plays an important role in the final disposal of spent nuclear fuel. The massive interior of the canister, manufactured from spheroidal graphite cast iron, makes the canister mechanically strong. A five-centimetre thick copper cladding protects the inner part and the canister from corrosion.
03.07.2009 The consideration of permafrost in final disposal
According to Professor Matti Saarnisto, Posiva’s estimates on future periods of permafrost are in conflict with empirical observations and estimates from other studies.
19.12.2005 Fourth meeting of INAGO, INAGO-4
The fourth meeting of INAGO (The International Advisory Group for Olkiluoto Investigations), INAGO-4, took place in November 2005 at the Hanasaari Cultural Centre, Espoo. The purpose of the meeting was to examine various elements of Posiva’s research and investigation programme in the ONKALO, including the revision of the CEIC procedures and the reorganisation of the ONKALO project; to provide a response to subjects raised by INAGO in their Issue List; to present the proposed programme on the EDZ (a subject raised by STUK); to examine elements of the integration of the ONKALO programme and, jointly with the Safety Committee, to consider a report from Posiva entitled “Control of water inflow and use of cement in the ONKALO after penetration of fracture zone R19”.