Transcript Meeting of the IAEA Technical Working Group on Nuclear Power Plant Instrumentation and Control (TWG-NPPIC) 20-22 May 2009 IAEA Vienna Reporting on I&C status and.

Meeting of the IAEA Technical Working Group on
Nuclear Power Plant Instrumentation and Control
(TWG-NPPIC)
20-22 May 2009
IAEA Vienna
Reporting on I&C status and recommendations to IAEA
Arndt Lindner
Institute for Safety Technology (ISTec) Garching
Institut für Sicherheitstechnologie (ISTec) GmbH
TWG-NPPIC
Content
1. Nuclear energy in Germany
2. I&C status in Germany
3. Recommendations to IAEA
4. Conclusions
Folie Nr. 2
Institut für Sicherheitstechnologie (ISTec) GmbH
Nuclear Energy in Germany
TWG-NPPIC
There are spent fuel
interim storages at
all sites
Folie Nr. 3
Institut für Sicherheitstechnologie (ISTec) GmbH
TWG-NPPIC
Nuclear Energy in Germany
NPP in operation
Output (MWel)
Start of comercial operation
Biblis A
1225
1975
Biblis B
1300
1977
Brokdorf
1440
1986
Brunsbüttel
806
1977
Emsland
1400
1988
Grafenrheinfeld
1345
1982
Grohnde
1430
1985
Gundremmingen B
1344
1984
Gundremmingen C
1344
1985
Isar 1
912
1979
Isar 2
1475
1988
Krümmel
1402
1984
Neckarwestheim I
840
1976
Neckarwestheim II
1400
1989
Philippsburg 1
926
1980
Philippsburg 2
1458
1985
Unterweser
1410
1976
Folie Nr. 4
Nuclear energy
provides
22,1% of power
generation
Institut für Sicherheitstechnologie (ISTec) GmbH
Nuclear Energy in Germany
TWG-NPPIC
 “Consensus on Nuclear Power” (from June 11, 2001)
is still valid (phase-out of nuclear power)
 Several NPPs plan and implement I&C up-grades
 Limitation and reactor control systems (GKN,
KKU, KKI)
 Modernized main control room (KKI)
 Independent emergency protection system (KKP)
 Turbine control and protection in several NPPs
 Applications for digital protection systems have been
submitted (GKN, KWB)
Folie Nr. 5
Institut für Sicherheitstechnologie (ISTec) GmbH
Nuclear Energy in Germany
TWG-NPPIC
 Update of the nuclear regulatory framework
Revision D now available
(http://regelwerk.grs.de/)
 12 modules
 I&C is subject-matter of Module 5
 The modules are available only in
German language
Folie Nr. 6
Institut für Sicherheitstechnologie (ISTec) GmbH
Nuclear Energy in Germany
Folie Nr. 7
TWG-NPPIC
Institut für Sicherheitstechnologie (ISTec) GmbH
I&C status in Germany
TWG-NPPIC
 Although lots of information about measures to
overcome CCF discussion on that issue starts again
 IEC 62340 Nuclear power plants - Instrumentation and
control systems important to safety - Requirements for
coping with common cause failure (CCF) is accepted
 Application to German NPPs is discussed
controversially
 Situation is complicated due to application of
competing standards
Folie Nr. 8
Institut für Sicherheitstechnologie (ISTec) GmbH
I&C status in Germany
TWG-NPPIC
 Example: Safety classification
Functions of Category A
 IAEA:
Functions of Category B
Functions
Category
 IEC 61226:
Safety
Integrityof
Level
(SIL) 0C
Non-categorized
functions
Safety
Integrity
Level
(SIL)(PL)
1 a
 IEC 61508:
Performance Level
Safety Integrity
LevelLevel
(SIL)(PL)
2 b
Performance
 ISO 13849:
Safety Integrity
LevelLevel
(SIL)(PL)
3 c
Performance
Safety Integrity
LevelLevel
(SIL)(PL)
4 d
Performance
Performance Level (PL) e
Folie Nr. 9
Institut für Sicherheitstechnologie (ISTec) GmbH
TWG-NPPIC
I&C status in Germany
Industry makes proposals
Regulators have
additional requirements
Licensed is what neither
industry nor regulators
want
Folie Nr. 10
Institut für Sicherheitstechnologie (ISTec) GmbH
TWG-NPPIC
I&C status in Germany
Ri
Redundancy i; i = 1, 2, 3, 4
IA
Set of input signals of sub system A
A
Sub-system A
IB
Set of input signals of sub system B
B
Sub-system B
PLCAi
PLC(s) Ai; i = 1, 2, 3, 4
PLCBi
PLC(s) Bi; i = 1, 2, 3, 4
i
Internal run time of redundancy i
Folie Nr. 11
Institut für Sicherheitstechnologie (ISTec) GmbH
I&C status in Germany
Folie Nr. 12
TWG-NPPIC
Institut für Sicherheitstechnologie (ISTec) GmbH
I&C status in Germany
Folie Nr. 13
TWG-NPPIC
Institut für Sicherheitstechnologie (ISTec) GmbH
Recommendations to IAEA
TWG-NPPIC
Basis: List of recommendations of TWG-NPPCI
Members to the IAEA to be considered in the
2008-2009 and 2010-2011 Activities
a.
b.
c.
d.
e.
Design, Qualification, and Application of Digital I&C Systems
Modernization of I&C Systems and Components
I&C HW and SW Life-Cycle Related Issues
Human Factors and Reliability, MCR Design, HSI
Improvement and Optimization of Equipment and System
Performance
f. I&C Knowledge Management and Transfer; Aging Workforce
g. Utilizing Lessons Learned in Operation, Maintenance, and
Modernization of I&C
h. Licensing I&C Systems
i. Emerging Technologies
Folie Nr. 14
Institut für Sicherheitstechnologie (ISTec) GmbH
Recommendations to IAEA
TWG-NPPIC
 Signal validation based on modern equipment (c, e, i)
 Complexity of I&C systems, equipment and software
(a, h)
 Concentration of functions on single CPUs (h)
 Qualification and use of FPGA and similar “hard
programmed” equipment (a, h)
 Electromagnetic Influence on I&C equipment by
conducted and radiated disturbances (a, i)
Folie Nr. 15
Institut für Sicherheitstechnologie (ISTec) GmbH
Recommendations to IAEA
TWG-NPPIC
 Control of CCF (a, h)
 Cyber security (new activities in IEC/SC45A) (a, h, i)
 Use of I&C equipment not designed for use in NPPs
in nuclear safety applications (a, h)
 Application of competing standards (nuclear vs.
nonnuclear) in licensing procedures (a, h)
Folie Nr. 16
Institut für Sicherheitstechnologie (ISTec) GmbH
Recommendations to IAEA
Folie Nr. 17
TWG-NPPIC
Institut für Sicherheitstechnologie (ISTec) GmbH