IAEA International Atomic Energy Agency International Standards for NPP I&C Presented to TWG-NPPIC 2009 May 21 Vienna, Ausria Gary Johnson +43 (1)

IAEA 2 Three organizations develop I&C standards that are used world-wide IAEA International Electrotechnical Commission IEEE I’ll speak about the first two

IAEA 3 The IAEA statue establishes the agencies standards development function One function of the IAEA is “to establish or adopt standards of safety … and to provide for the application of these standards, … at the request of a State, to any of that State's activities in the field of atomic energy” These standards are to be established in consultation and, where appropriate, in collaboration with the competent organs of the United Nations and with the specialized agencies concerned IAEA statute >

IAEA 4 The purpose of IAEA Safety Guides Provide guidance on how to comply with the safety requirements (In our case NS-R-1) Indicate international consensus that it is necessary to take the measures recommended (or equivalent alternatives) Reflect best practices.

IAEA 5 Use of IAEA Safety Guides Used as the basis for IAEA design reviews, regardless of the national regulations Some member states incorporate IAEA requirements (NS-R-1) and safety guides into their regulations Some member states incorporate IAEA requirements into their regulations but treat safety guides as recommendations Some member states use IAEA requirements and safety guides as references in development of regulations or national standards. (this is the most common) Some member states do not use IAEA safety guides at all IEC uses NS-G-1.3 as the source of elementary guidelines for I&C systems important to safety. IEC standards provide further guidance on implementing these principles. NS-G-1.3 is unique in this regard

IAEA 6 IAEA Guidance Overview Safety of nuclear facilities Radiation protection and safety of radiation sources Safe management of radioactive waste Safe transport of radioactive material General safety (cross-cutting themes) Legal and governmental infrastructure Emergency preparedness and response Management systems Assessment and verification Site evaluation Radiation protection Radioactive waste management Decommissioning Remediation of contaminated areas Thematic standards Nuclear power plants: design Radiation related facilities and activities Research reactors Fuel cycle facilities Waste treatment and disposal facilities Transport of radioactive material Facilities specific standards Nuclear power plants: operation Safety Fundamentals All IAEA safety standards are available at: All free! All IAEA safety standards are available at: All free!

IAEA 7 NS-R-1: “Safety of NPPs – Design” is the top IAEA design requirements document Not legally binding Adopted as regulation in some states Influenced regulations in other states Not intentionally LWR specific Responds to safety fundamentals Prepared by engineers - little lawyer input Outside standards are not incorporated No public comment process Represent a broad consensus All member states have the opportunity to comment Endorsed by the Commission for Safety Standards Approved by the IAEA Board of Governors Other safety standards also relevant at a second order For example, GS-R-3 on management systems (including quality)

IAEA 8 Current safety guidance for design Safety of Nuclear Power Plants: Design Safety Requirements NS-R-1 Software for Computer Based Systems Important to Safety NS-G-1.1 Safety Assessment and Verification NS-G-1.2 Instrumentation and Control Systems Important to Safety NS-G-1.3 Design of Fuel Handling and Storage NS-G-1.4 External Events Excluding Earthquakes NS-G-1.5 Seismic Design and Qualification NS-G-1.6 Protection Against Internal Fires and Explosions NS-G-1.7 Design of Emergency Power Systems NS-G-1.8 Design of the Reactor Coolant System and Associated Systems NS-G-1.9 Design of Reactor Containment Systems NS-G-1.10 Protection against Internal Hazards other than Fires and NS-G-1.11 Design of the Reactor Core NS-G-1.12 Radiation Protection Aspects of Design NS-G-1.13

IAEA 9 There is plan to restructure IAEA safety guides This plan affects the design safety guides Safety Classification Deterministic Safety Analyses PSA for Design & Operations Design of I&C Systems NS-G-1.2 Safety Assessment &Verification Radiation Protection & Radioactive Waste Management NS-G-1.4 Fuel handling & storage systems Reactor Containment Systems & Other Buildings NS-G-1.8 Reactor Coolant & Associated Systems NS-G-1.12 Reactor Core Protection against Internal & External Hazards NS-G-1.6 Seismic Design & Qualification NS-G-1.3 I&C Systems Important to Safety NS-G-1.1 Software for Computer Based Systems Important to Safety NS-G-1.5 External Events Excluding Earthquakes NS-G-1.7 Protection Against Internal Fires & Explosions NS-G-1.8 Design of Emergency Power Systems NS-G-1.10 Design of Reactor Containment Systems NS-G-1.9 Design of the RCS & Associated Systems NS-G-1.11 Protection against Internal Hazards except Fires & Explosions NS-G-1.12 Design of the Reactor Core NS-G-1.13 Radiation Protection Aspects of Design NS-G-1.4 Fuel Handling & Storage + + Auxiliary Systems Electric Power Systems Completion scheduled for material from additional documents to be included Existing StructureNew Structure

IAEA 10 Update of the I&C and electrical guides has started I&C Guide Incorporate and replace the software guide Much less detail on software Leave details to standards Update to address new topics and new consensus, e.g., Communications independence Soft control Cyber security Complex electronics Design for aging management Electrical Guide Expand scope from emergency power systems to all electrical systems To some extent this is a restructuring Offsite power now in an annex Much of the emergency power guidance is applicable to all systems Check guidance for completeness and tie to NS-R-1 E.g., note the role of breaker coordination in limiting the effects of internal events, such as fire Integrate into new structure of safety guides May involve broadening scope from NPP to Nuclear Installations Identify and eliminate unnecessary conflicts with national approaches

IAEA 11 Work plan Solicit input Meetings to develop outline About 5 experts About August Develop draft (homework) Post draft for review Meeting to discuss draft About November Revise draft (homework) Post again for review Meeting to review draft Different or larger group About January 2010 Finalize draft (homework) Possibility of extra meetings if needed Solicit input Meetings to develop outline About 5 experts About August Develop draft (homework) Post draft for review Meeting to discuss draft About November Revise draft (homework) Post again for review Meeting to review draft Different or larger group About January 2010 Finalize draft (homework) Possibility of extra meetings if needed Draft outline and current document is available on-line The website allows you to: Initiate or participate in threaded discussions Post comments Post markups If you post a mark-up please also post comments explaining the markup This is the first time I’ve tried a web- based process, so Advise me on how to improve the site. Be patient You need an account to access

IAEA International Atomic Energy Agency If you wish to participate Contact me at Or Give me a business card

IAEA 13 IEC SC45A prepares standards applicable to electronic and electrical functions for I&C of nuclear facilities By agreement between IEC and IAEA SC45A standards provide detailed implementation guidance for IAEA safety standards. Thirty-one nations are members of SC45A Twenty-two are voting members About half are regular, active participants Currently there are 7 working groups Sensors & Measurements Digital Systems Special Process Measurements and Rad Monitoring Reliability I&C systems Modernization & Ageing Management Sixty-six standards issued to date

IAEA 14 Work in progress - I&C principles IEC Ed. 2.0 Nuclear power plants - Instrumentation and control important to safety - General requirement for systems IEC Ed. 3.0 Nuclear power plants - Instrumentation and control important to safety - Classification of instrumentation and control functions

IAEA 15 Work in progress - Sensors & Measurements IEC Ed. 2.0 Nuclear Power Plants - Instrumentation important to safety - Temperature sensors (In-core and primary coolant circuit) : Characteristics and test methods IEC Ed. 1.0 Nuclear Power Plants - Instrumentation important to safety - Application of Gamma Thermometers (GT) for Local Power Range Monitor (LPRM) calibration PNW 45A-750 Ed. 1.0 Nuclear Power Plants - Instrumentation important to safety - Thermocouples : Characteristics and test methods IEC Ed. 2.0 Nuclear power plants - Instrumentation important to safety - Acoustic monitoring systems for detection of loose parts: Characteristics, design criteria and operational procedures

IAEA 16 Work in progress - Radiation Monitoring IEC Ed. 2.0 Nuclear power plants - Instrumentation important to safety - Radiation monitoring for accident and post-accident conditions - Part 1: General requirements IEC Ed. 2.0 Nuclear power plants - Instrumentation important to safety - Radiation monitoring for accident and post-accident conditions - Part 2: Equipment for continuous off-line monitoring of radioactivity in gaseous effluents and ventilation air IEC Ed. 2.0 Nuclear power plants - Instrumentation important to safety - Radiation monitoring for accident and post-accident conditions - Part 3 : Equipment for continuous high range area gamma monitoring IEC Ed. 2.0 Nuclear power plants - Instrumentation important to safety - Radiation monitoring for accident and post-accident conditions - Part 4: Equipment for continuous in-line or on-line monitoring of radioactivity in process streams These are actually in publication

IAEA 17 Work in progress - Control Rooms & Human Factors IEC Ed. 2.0 Nuclear power plants - Control rooms - Supplementary control points for reactor shutdown without access to the main control room PNW 45A-748 Ed. 1.0 Nuclear Power Plants - Control rooms - Computer based procedures

IAEA 18 Work in progress - Digital Systems IEC Ed. 2.0 Nuclear Power Plants - Instrumentation and control important to safety - Data communication IEC Ed. 1.0 Nuclear Power Plants- Instrumentation and control important to safety- Selection and use of complex electronic components for systems performing category A functions IPNW 45A-742 Ed. 1.0 Nuclear Power Plants - Instrumentation and control systems important to safety - Requirements for Computer Security Programmes

IAEA 19 Work in progress - Ageing IEC Ed. 1.0 Nuclear Power Plants - Instrumentation and control important to safety - Management of aging of electrical cabling systems IEC Ed. 1.0 Nuclear Power Plants - Instrumentation and control important to safety - Electrical equipment condition monitoring methods - Part 1: General IEC Ed. 1.0 Nuclear power plants - Instrumentation and control important to safety - Electrical equipment condition monitoring methods - Part 2: Method descriptions - Indenter modulus IEC Ed. 1.0 Nuclear power plants - Instrumentation and control important to safety - Electrical equipment condition monitoring methods - Part 3: Method descriptions - Elongation at break IEC Ed. 1.0 Nuclear power plants - Instrumentation and control important to safety - Electrical equipment condition monitoring methods - Part 4: Method descriptions - Oxidation induction temperature IEC Ed. 1.0 Nuclear power plants - Instrumentation and control important to safety - Electrical equipment condition monitoring methods - Part 5: Method descriptions - Optical cables PWI 45A-1 Ed. 1.0 Management of ageing of nuclear power plant sensors PWI 45a-3 Ed. 1.0 Management of aging of nuclear power plant connectors PWI 45a-4 Ed. 1.0 Management of aging of nuclear power plant relays PWI 45a-5 Ed. 1.0 Management of aging of nuclear power plant electronics PWI 45A-6 Ed. 1.0 Obsolescence management for digital and programmable I&C in nuclear power plant

IAEA 20 How to participates Participants must are representatives of their nation You must be nominated by your national committee of the IEC Formal correspondence goes through the national committee Each country has a chief delegate for SC45A Next meeting Yokohama, Japan 2009 September 10 to 18 Much information is available at