development of nuclear safety goals for npps in china · the hierarchy of legislation in china...

8 Jul - 12 Jul, 2013, Vienna, Austria

Development of Nuclear Safety Goals for NPPs in China

Huang Dongxing

Support Center of Nuclear Technology, CAEA

Technical Meeting on Development of a TECDOC on Development and Application of a Safety Safety Goals Framework for Nuclear

Installations, Vienna, Austria, from 8 to 12 July, 2013


Content

• Regulation of Nuclear Safety in China

• Development of safety goals

• Safety Goals Framework in China

• Summary

Technical Meeting on Development of a TECDOC on Development and Application of a Safety Safety Goals Framework for Nuclear Installations, Vienna, Austria, from 8 to 12 July, 2013


Nuclear Legislation System

• From the very beginning of nuclear industry, Chinese

government has been attaching high importance to

nuclear safety for nuclear facilities and nuclear

activities:

– Principle: Safety first, Quality first

– Establishment of safety regulatory system including

regulatory organizations, legislation and quality

assurance management system



State Council

CAEA MOE/NNSA NEA MOH MOST MOPS SDPC

Organizational Structure of the Government (nuclear and radiation related)

CAEA: China Atomic Energy Authority

MOE: Ministry of Environment Protection

NNSA: National Nuclear Safety Administration

NEA: National Energy Administration

MOH: Ministry of Health

MOST: Ministry of Science & Technology

MOPS: Ministry of Public Security

SDPC: State Development & Planning Commission



The Hierarchy of Legislation in China

Technical Documents

Safety Guides

Ministry’s Rules or Orders

Administrative

Regulations

Laws Mandatory

Mandatory

Mandatory

Guiding Doc.

Reference Doc.

By People’s Congress

By State Council

By

Governmental

Ministry (s)



• General safety goal

– to protect people and the environment from

harmful effects of ionizing radiation(HAF 102)

Goal of radiation protection

Goal of technical safety

Development of Safety Goals



• Quantitative safety goal

– 2002, NNSA published “Technical policy for several

important safety problem during the design of new

nuclear power plant. Quantitative safety goals

were defined as:

CDF for new NPP: 10-5/y

LERF for new NPP: 10-6/y




• Quantitative safety goal

– 2006, NNSA published HAD 102/17 “Safety

Valuation and Verification for NPP”.

CDF for operating NPP 10-4/y, for new NPP: 10-5/y

LERF for operating NPP 10-5/y, for new NPP: 10-6/y

– 2007, NNSA published “Principle of nuclear safety

review for 2nd generation NPP plus”.

CDF for 2nd generation NPP plus: 10-4/y

LERF for 2nd generation NPP plus: 10-5/y




• Safety goal after Fukushima Accident – 2010, NNSA published “Technical Policy of

Application of PSA in Nuclear Safety Field”. – 2012, “12th Five Years Scheme of Nuclear Safety

and Radiation Pollute Preventive Treatment and the Long-range Perspective Goal to 2020” is approved by the State Council.

For new NPP during 12th 5-years: CDF: 10-5/y; LERF: 10-6/y

For new NPP later: Practicalelimination of the possibility

of large release of radiation




• Aimed to the 2nd generation NPP plus – Enhance the capability of prevention and mitigation

of severe accident. • Core injection • containment discharge filtrated system • Analysis of Available and accessibility of equipment • Preparation of SAMG with all scene

– Improvement of cold source design – Improvement of electrical design – Improvement of ability to extreme external event,

such as earthquake, flooding

Specific Safety Goals



• More innovation measures in design – Some measures used in AP1000 and EPR are

reference – Next generation NPP

Specific of Safety Goals



Framework of Safety Goals HIERARCHY

Level Content

Top Level

General Safety Goal

to protect people

and the

environment from

harmful effects of

ionizing

radiation(HAF 102)


Upper level

Safety Goals

Top

level

Immediate level

Safety Goal

Low level Safety Goal



Level Content

Upper Level

Qualitive safety goal

Ensuring adequate

protection in all

operational modes

of NPP: Goal of

radiation protection

Goal of technical

safety

Upper level

Safety Goals

Top

level

Immediate level

Safety Goal





Level content

Intermediate Level

Quatitive Safety Goals

Proven approaches and good practices to achieve the higher level safety goals as well as definition of general requirements.

Upper level

Safety Goals

Top

level

Immediate level

Safety Goal





Level content

Iow Level

Specific Safety Provisions

Providing necessary specific safety measures for nuclear power plant at the site

Upper level

Safety Goals

Top

level

Immediate level

Safety Goal





Summary • The framework of nuclear safety goals could be

constructed as a four-level Hierarchy.

• The safety goal for NPP is strict after Fukushima

Accident.

• Licensing requirements apply to all stages of nuclear

facilities.

• Nuclear Safety Inspection without blindness.

• Effective national nuclear emergency management

system

NPPs should be in safety status.


Thanks for your attention!



Questions


1. If the safety goal is higher and the safety

character is better such as AP1000 and EPR,

are emergence device able decrease a litter?

For example the size of emergence zone?

2. How to use the probability safety goal to

research reactor?