Comprehensive renewal of IC at Loviisa Nuclear Power Plant

1. 27.10.2008 Generation Ulf Lind�n 1 Comprehensive renewal of I&C at Loviisa Nuclear Power Plant IAEA Technical Meeting on the Impact of Digital Instrumentationand Control Technologies on the Operation and Licensing of Nuclear Power Plants3-6 November 2008 Beijing, China

2. Generation Ulf Lind�n 27.10.2008 2 Loviisa 1 and 2 Reactor: 510 MWe PWR (VVER-440 213) Plant owner: Fortum Power and Heat Location: Finland, Loviisa, 80 km east of Helsinki Commissioning: Unit 1 1970 - 1977, Unit 2 1972 - 1980 High energy availability, short outages Originally installed I&C systems: Siemens hardwired solution for operational I&C and ESFAS (Teleperm C, Simatic P) Russian solution for RPS (SUZ) and Control rod I&C Renewal 2008: part of RPS: AREVA TXS waste water handling systems: Siemens T2000

3. Generation Ulf Lind�n 27.10.2008 3 Load Factors of Loviisa Power Plant 1977-2007

4. Generation Ulf Lind�n 27.10.2008 4 Renewal of I&C - Reasons for Renewal The nuclear power units Lo1 and Lo2 were commissioned in 1977 and 1980. Plant life time has been extended to at least 50 years. It is not possible to maintain the original I&C systems to the end of the plant lifetime; the systems are obsolete and problems with spare parts will increase. It is hard to get new engineers that have the knowledge in maintaining and repairing 30 years old electronic cards An I&C renewal was required. The objective of the renewal is to ensure that the I&C systems will not limit the safe and economical use of the plant during the remaining lifetime of plant. The units are now around the half of their lifetime. Now it is the right time to make the renewal while there is still a lot of lifetime left.

5. Generation Ulf Lind�n 27.10.2008 5 Milestones passed Here we can se what has been done We started in the late 1990s and in 1999 the strategy for the renewal was ready. In strategy renewal in two parts a conceptual part and an implementation part Project plan ready for conceptual part in 2000Here we can se what has been done We started in the late 1990s and in 1999 the strategy for the renewal was ready. In strategy renewal in two parts a conceptual part and an implementation part Project plan ready for conceptual part in 2000

6. Generation Ulf Lind�n 27.10.2008 6 Overall Scope of the Renewal

7. Generation Ulf Lind�n 27.10.2008 7 STAGE 1 (pilot stage) Reactor shutdown, control rod sequence control and position indication automation systems of waste water handling Time schedule

8. Generation Ulf Lind�n 27.10.2008 8 Main Principle of the Renewal The functions of the old automation remain. Single failure tolerance is built into the automation concept New cabinets are placed into new buildings that fulfill all new requirements (seismic req., EMC, etc.). Selection of a competent supplier, who has applicable products of reliable and proven technology that can be licensed in Finland Simulators shall be used effectively in the renewal process. process and automation design disturbance and accident analyses design, testing and validation of the control room MMI testing of automation training of control room operatorsprocess and automation design disturbance and accident analyses design, testing and validation of the control room MMI testing of automation training of control room operators

9. Generation Ulf Lind�n 27.10.2008 9 New I&C buildings

10. Generation Ulf Lind�n 27.10.2008 10 Control room Hybrid control room Process computer very important, since startup 1977 PCS important Large, extensive performance calculation Lot of trends and trend groups, long history, fast response time, good process pictures designed together with control room operators.Hybrid control room Process computer very important, since startup 1977 PCS important Large, extensive performance calculation Lot of trends and trend groups, long history, fast response time, good process pictures designed together with control room operators.

11. Generation Ulf Lind�n 27.10.2008 11 Loviisa 1 main control room before renewal of I&C for unit 1 stage 1)

12. Generation Ulf Lind�n 27.10.2008 12 Loviisa 1 Control room stage 1

13. Generation Ulf Lind�n 27.10.2008 13 Doing I&C projects in stagesChallenges Doing the project in stages may be more economical than in one big outage, but: Several stages have to go on in parallel More resources are needed Are the software and hardware version installed in the first stage still usable in later stages or will a long project cause ongoing updates? There will be several test fields and several factory acceptance tests � is testing only in small parts enough? Can people involved commit themselves to be in the project for so many years? Persons may change on both the supplier and purchaser side

14. Generation Ulf Lind�n 27.10.2008 14 Challenges: Critical Path Installation and commissioning performed in outages Short time for work A problem during installation or commissioning can prolong the outage in an unacceptable way A delay in one stage can move the schedule for other stages Very challenging to do the modifications in the control room in stages May need temporary controls during outages for critical systems and components Challenging to do the modifications in the simulator The training of control room operators must start 6 - 12 months before commissioning,

15. Generation Ulf Lind�n 27.10.2008 15 Some lessons learned Good Requirement Specifications are very important tools for tracing requirements needed Collection of initial data from an old plant huge amount, in which form and in which language shall it be delivered can the engineers of today read 30 year old hand written circuit diagrams Resources most experienced people on the plant needed not the only project for the supplier Supplier's organisation the supplier must have a project organisation on the site that closely works together with plant people Authorities national nuclear guidelines must be taken into account in licensing

16. Generation Ulf Lind�n 27.10.2008 16 Success factors Fortum had a good knowledge of the new system Comprehensive training of people, participating in the testfield, installation and commissioning Large pre-installations were done before outage Simulated assisted testing Automation systems must be tested before installation Like virtual commissioning, dynamic tests can be run Errors from faulty initial data could also be found

17. Generation Ulf Lind�n 27.10.2008 17 Summary Two Nuclear Power Plant Units Four modernization stages/unit between 2008 and 2014 Two main suppliers New I&C buildings enable pre-installations Installation and commissioning in normal refueling outages Modifications made also to the control room and full scope training simulator Successful commissioning in 2008 of stage 1.