EUR volume 3 AES 92 subset

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1 European Utility Requirements for LWR nuclear power plants EUR volume 3 AES 92 subset Yury ERMAKOV, RosEnergoAtom Olivier ROUSSELOT, EDF EUR seminar /12/2005

2 key points of the presentation ❽ Presentation of AES 92 design ❽ Main results of AES 92 assessment ❽ Status of subset chapters ❽ Next steps EUR seminar page 2

3 the AES 92 design as licensed by RF GAN for Novovoronezh-2 NPP in 1999 EUR seminar page 3

4 Overall layout of an AES-92 NPP with a VVER-1000 Reactor EUR seminar page 4

5 Main developers of the AES 92 project Federal State Unitary Enterprise Research, Design and Engineering Survey Institute «Atomenergoproekt» Federal State Unitary Enterprise EDO «Gidropress» Federal State Enterprise Russian Scientific Center «Kurchatov Institute» EUR seminar page 5

6 AES 92 Development ❽ USSR Governemt regulation for improving NPP safety ❽ AES 92 design for REA Novovoronezh-2 NPP in Russia Construction license by RF Gan on April 12, 1999 Design approval by Minatom on December 30, 1999 ❽ AES 92 design for NPCIL Kundankulam NPP in India Construction license by Indian AERB on March 22, 2002 First concrete: unit 1: March 2002 unit 1: July 2002 Physical progress achieved (as on October 2005): unit 1 = 61% unit 2 = 52% Scheduled date of criticality: unit 1: 2007 unit 2: 2008 EUR seminar page 6

7 The safety concept: systematic implementation of diversity for all safety functions EUR seminar page 7

8 AES 92 design: main systems EUR seminar page 8

9 AES 92 design: main systems The main active safety systems: Active emergency core cooling + containment spray (pumps + ejectors, 4 trains) active heat removal from steam generator (active steam condenser) active annulus ventilation system EUR seminar page 8

10 AES 92 design: main systems The main passive safety systems: Hydroaccumulators stage 1 (compressed gas driven) Hydroaccumulators stage 2 (gravity driven) Passive heat removal from steam generator (passive steam condenser) Passive annulus filtration system Fast boron injection system EUR seminar page 8

11 AES 92 Containment Passive filtration system Outer wall Reinforced concrete Metallic liner Inner wall Prestressed concrete EUR seminar page 9

12 Corium Catcher Lower plate Cantilever truss Filler Concrete shaft Housing EUR seminar page 10

13 Main results of AES 92 assessment EUR seminar page 11

14 Partners involved in the AES 92 assessment EUR partners: EDF: Mr Olivier ROUSSELOT ENERGOATOM: Mr Vitaly VORONTSOV FORTUM: Mr Bahey MOHSEN IBERDROLA: Mr Carlos PADILLA ROSENERGOATOM: Mr Vadim SEMISHIN Mrs Elena SOLONKO SOGIN: Mr Alceste RILLI VATTENFALL/FKA: Mr Johan ANDERSSON AES 92 Designers: ATOMENERGOPROEKT Mr Mikhail MALTSEV OKB GIDROPRESS: Mr Nikolay FIL KURCHATOV INSTITUTE Several experts EUR seminar page 12

15 first views on volume 3 AES 92 subset From a preliminary survey of AES 92 compliance analyses: ❽ there is a rather good level of compliance with most of the requirements of the chapters of the EUR Volume 2, revision C ❽ in some cases, there is compliance with objectives only Russian Federation specific regulatory context the designer intends to comply in the detailed design phase. ❽ Only several critical issues identified so far EUR seminar page 13

16 first views on volume 3 AES 92 subset Compliance with the EUR objectives: ❽ PSA targets: the results are quite low for the internal events, thus the EUR objectives are reachable, but most internal and external hazards have not been assessed yet ❽ Safety classification: OPB88/97 based on different principles than EUR. The safety classified part may be a bit larger than allowed in EUR. ❽ Primary and Secondary Containment performance: balanced design achievable because of big reserve for optimisation EUR seminar page 14

17 first views on volume 3 AES 92 subset Compliance with the EUR objectives (continued): ❽ Fuel & core performance Average FA Burn-up: 51 MWd/kgHM (55 for EUR) Type of fuel: initially UO 2 core, 50% MOX feasible Length of fuel cycle: initially 12 months, but capability for 24 ❽ Codes & standards: use of Euronorms looks possible ❽ HV Grid requirements: comparable voltage-frequency fields EUR seminar page 15

18 first views on volume 3 AES 92 subset Critical issues that may lead to non-compliances: provisional list; will be further examined for the next few weeks ❽ Plant autonomy beyond 24 hours in case of LOCA + SBO ❽ Spent fuel storage capacity ❽ Refuelling & regular maintenance outage duration ❽ External events: level of Design Basis Earthquake ❽ Reactor vessel design life ❽ I&C and Man-machine interface ❽ Overall construction time EUR seminar page 16

19 Status of the AES 92 subset chapters EUR seminar page 17

20 EUR Volume 3 AES 92 subset Status of the chapters ❽ Chapter 3.1 AES 92 Plant Description November 2005 version available within EUR Organisation ❽ Chapter 3.2 Highlights of the analysis of compliance detailed assessment of compliance being finalised synthesis reports to be approved by EUR SC tomorrow list of the highlighted topics to be finalised before March 2006 ❽ Chapter 3.3 Specific requirements If requested during SC review No text released outside the EUR Organisation so far EUR seminar page 18

21 EUR Volume 3 AES 92 subset Next steps ❽ EUR Harmonisation Review on March 13-15, 2006 Cross checking of AP1000, AES 92 & EPR assessments Revision of the AP1000 and AES92 assessments where needed to ensure consistency ❽ EUR SC#66 on March 23 & 24, 2006 Green light for release of Volume 3 AES 92 subset ❽ Finalisation of the text, preparation of the published version (paper and electronic) ❽ Volume 3 AES 92 subset distribution possibly from June 06 EUR seminar page 19

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