Foreword
GB/T 17680 consists of the following 10 parts under the general title Criteria for emergency planning and preparedness for nuclear power plants.
——GB/T 17680.1 Criteria for emergency planning and preparedness for nuclear power plants - The dividing of emergency planning zone;
——GB/T 17680.2 Criteria for emergency planning and preparedness for nuclear power plants - Off-site emergency functions and organization;
——GB/T 17680.3 Criteria for emergency planning and preparedness for nuclear power plants - Functional and physical characteristics of off-site emergency facilities;
——GB/T 17680.4 Criteria for emergency planning and preparedness for nuclear power plants - The off-site emergency planning and implementing procedures;
——GB/T 17680.5 Criteria for emergency planning and preparedness for nuclear power plants - Maintenance of off-site emergency response capacity;
——GB/T 17680.6 Criteria for emergency planning and preparedness for nuclear power plants - On-site emergency response functions and organizations;
——GB/T 17680.7 Criteria for emergency planning and preparedness for nuclear power plants - Function and physical characteristics for on-site emergency facilities;
——GB/T 17680.8 Criteria or emergency planning and preparedness for nuclear power plants - On-site emergency planning and implementing procedures;
——GB/T 17680.9 Criteria for emergency planning and preparedness for nuclear power plants - Maintenance of on-site emergency response capacity;
——GB/T 17680.10 Criteria for emergency planning and preparedness for nuclear power plants - Criteria for emergency radiological field monitoring, sampling and analysis conducted by nuclear power plant operating organizations.
This is Part 8 of GB/T 17680, which is revised on the basis of EJ/T 880-1994 Emergency planning and procedures of nuclear power plant operating organizations and formulated based on the requirements of current nuclear emergency regulations in China, in combination with the experience and actual situation of emergency work in nuclear power plants in China, and with reference to relevant national standards in the United States.
EJ/T 880-1994 shall be abolished from the implementation date hereof.
The following main changes have been made with respect to the nuclear industry standard EJ/T 880-1994:
——Special requirements and related contents are added for the preparation of emergency plans by operating organization of nuclear power plants at multi-reactor site;
——Some new nuclear emergency concepts or terms are included, such as: generic intervention level, generic action level and operational intervention level;
——The contents pertaining to training, exercise and plan revision, which were presented as separate clauses in the original industry standard, are merged into a single clause titled "maintenance of emergency response capability";
——The implementing procedures are divided into two categories: emergency response procedures and emergency preparedness support procedures.
This part was proposed by the National Nuclear Emergency Office and the National Technical Committee on Nuclear Energy of Standardization Administration of China.
This part is under the jurisdiction of National Technical Committee on Nuclear Energy of Standardization Administration of China.
Drafting organization of this part: Chinese Nuclear Society.
Chief drafters of this part: Chen Zhuzhou and Bai Guang.
Criteria for emergency planning and preparedness for nuclear power plants - On-site emergency planning and implementing procedures
1 Scope
This part of GB/T 17680 specifies the criteria to be followed in preparing the on-site emergency plan for nuclear power plants and corresponding emergency implementing procedures, and puts forward requirements and recommendations on the format and content of the emergency plan and implementing procedures.
This part is applicable to emergency preparedness and response of various land-based fixed nuclear power plants, and may be used as a reference for other nuclear facilities.
2 Terms and definitions
For the purposes of this part of GB/T 17680, the following terms and definitions apply.
2.1
emergency
status in which certain immediate actions beyond normal working procedures are required to avoid nuclear accidents at nuclear power plants or to mitigate the consequences of accidents, sometimes referred to as emergency status; it also generally refers to taking immediate actions beyond normal working procedures
2.2
emergency plan
approved document that comprehensively describes the emergency response functions, organizations, facilities and equipment of the nuclear power plant operating organization, as well as the coordination and mutual support relationships with external emergency organizations; this document must be supplemented by special implementing procedures
2.3
site
area where a nuclear power plant with legal boundaries and under the effective control of the nuclear power plant operating organization is located
2.4
off-site
area excluding the site
2.5
on-site
area where the operating organization is responsible for making emergency plans and responding to emergencies
2.6
emergency facility
facility for emergency response purposes, which will be arranged in accordance with relevant regulatory requirements and the principle of active compatibility; it includes places for emergency response purposes, and emergency response systems and equipment therein
Note: On-site emergency response facilities generally include: control room, backup control point, technical support center, operation support center, emergency command center, emergency communication facilities, emergency monitoring and evaluation facilities, medical rescue facilities, and public information center.
2.7
emergency classification
classification of emergency statuses; the emergency statuses of nuclear power plants are divided into the following four classes:
Emergency standby: some specific working conditions or external events that may endanger the safety of the plant occur; the relevant personnel of the plant are on standby, and some emergency organizations outside the plant may be notified
Plant emergency: the radiation consequences are limited to some areas of the plant; the on-site personnel take actions according to the emergency plan of the operating organization, and relevant emergency organizations outside the plant are notified
Site emergency: the radiation consequences are limited to the site; the on-site personnel take actions, and off-site emergency organizations are notified, some of which may also take actions
Off-site emergency: the radiation consequences have exceeded the boundary of the site; the on-site and off-site personnel take actions, and the general emergency plan shall be implemented
2.8
corrective actions
measures and actions taken at or near the area of accident leading to emergency for the purpose of terminating or mitigating the consequences brought by emergency status, such as mitigation controls for core damage, emergency overhaul, fire extinguishing, flooding treatment in plant building, typhoon impact resistance and earthquake disaster resistance
2.9
emergency action level
parameters or criteria used as the basis for emergency classification, which are generally predetermined, site-specific and observable thresholds corresponding to a certain emergency status
2.10
emergency planning zone
zone established in advance around a nuclear power plant for the purpose of taking timely and effective protective actions to protect the public in the event of an accident, which is provided with a developed emergency plan and for which emergency preparedness has be made; at present, the emergency planning zones in China are divided into plume emergency planning zone for plume exposure pathway and ingestion emergency planning zone for ingestion exposure pathway
2.11
emergency protective action
protective action taken in emergency status, with an aim to avoid or reduce doses that may be received by staff and the public
2.12
intervention level
dose level expressed in terms of preventable dose in the case of emergency exposures, at which specific protective or remedial action shall be taken
2.13
generic intervention level
internationally recommended intervention level with certain generality
2.14
generic action level
internationally recommended generic intervention level for controlling food under continuous or emergency exposure, expressed as activity concentrations in food, milk, and water
2.15
operational intervention level
measurable amount of radioactivity equivalent to an intervention level expressed in avertable dose, expressed as a radionuclide level or a measurable dose rate in an environmental or food sample
3 Emergency plan
3.1 Preparation of on-site emergency plan for nuclear power plant
The nuclear power plant operating organization shall prepare its emergency plan as per the format specified in 3.6 and the contents specified in 3.7 of this part, in which the personnel, organizations, facilities, equipment and other resources that the operating organization may use for emergency purposes, and other emergency preparedness to be carried out shall be highlighted, and the emergency response actions that may be taken under emergency status, as well as the connection, coordination and support with other off-site emergency organizations shall also be described.
3.2 Expression of emergency plan
The on-site emergency plan of nuclear power plant is a working document for performing emergency preparedness and implementing emergency response by operating organizations, which shall be concise, focused, comprehensive, informative and with good operability. Supporting documents and information related to the emergency plan shall be incorporated in the plan or annexes to the plan as much as possible.
3.3 Changes in the format and content of emergency plan
Considering the different characteristics of each nuclear power plant and its surrounding environment, the nuclear power plant operating organization may make appropriate changes to the format and content specified in 3.6 and 3.7 when preparing the emergency plan, but it shall ensure that the emergency plan has covered the main contents specified in this part, and the changed writing format and content have been approved by relevant departments.
3.4 Revision of emergency plan
To ensure the continuous improvement and effectiveness of the emergency plan, it shall be reviewed every 2~3 years, and revised based on the results of the review and the problems identified in training and exercises. The plan shall also be revised in time in case of major accidents or major changes in national laws and regulations. The revised emergency plan shall be submitted for approval following the legal procedures.
3.5 On-site emergency plan for nuclear power plants at multi-reactor site
The operating organization of nuclear power plants at multi-reactor site shall fully consider the following issues when preparing an emergency plan:
a) Impact of the accident occurring in the unit (or power plant) on the unit (or power plant) where the accident does not occur;
b) Making full use of and sharing emergency resources for emergency preparedness and response, and avoiding the focused arrangements of emergency organizations and emergency facilities and equipment;
c) It is necessary to not only adhere to the principle of unified command and active coordination, but also require the owner to fulfill nuclear safety responsibilities and obligations for nuclear emergency preparedness. Under this principle, a unified emergency organization and a unified emergency planning zone shall be established for the site area.
Foreword i
1 Scope
2 Terms and definitions
3 Emergency plan
4 Emergency plan implementing procedures
