Circular 28/2011/tt-Bkhcn: Regulations On Nuclear Safety Requirements For Nuclear Power Plant Locations

Original Language Title: Thông tư 28/2011/TT-BKHCN: Quy định về yêu cầu an toàn hạt nhân đối với địa điểm nhà máy điện hạt nhân

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The CIRCULAR regulates nuclear safety requirements for nuclear power plant locations _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ based on Atomic Energy Act 3 June 2008;
Pursuant to Decree No. 70/2010/ND-CP on June 22, 2010 the Government detailing and guiding the implementation of some articles of the law on atomic energy in nuclear power plants;
Pursuant to Decree No. 28/2008/ND-CP dated 14 March 2008 of the Government functions, tasks, powers and organizational structure of the Ministry of science and technology;
The Minister of science and technology rules of nuclear safety requirements for nuclear power plant locations as follows: chapter I GENERAL PROVISIONS article 1. Scope this circular regulates nuclear safety requirements and surveys, reviews of service for approving the location of nuclear power plants (hereinafter abbreviated as of NPP).
Article 2. Object applied to this circular is applicable to client agencies and organizations involved in the survey, assessment, appraisal, approval of NPP locations; with respect to the relevant advisory organization.
Article 3. Explanation of terms In this circular, the terms below are interpreted as follows: 1. design basis including conditions, process, factors due to natural or human-caused, was as explicitly when designing of NPP, so that when conditions appear, the process, the factors that , of NPP's safety systems still operate are under design, the safety limits are approved by the competent authority are still guaranteed.
2. Adverse conditions are conditions, the process of natural factors, human-caused or likely to give rise to problems in respect of NPP.
3. active fault is the fault likely cause tectonic shift on or near the ground.
4. Karst is the complex processes and geological phenomena that appear on the surface or in the ground mainly because of chemical dissolved rock, make up the empty caves, destroyed and structural change, the status of soils, groundwater, mechanism peculiarities of terrain, hydrology network mechanism.
5. Problems in conditional design, process, natural and artificial factors likely to give rise to the issue has been included in the design.
Chapter II GENERAL REQUIREMENTS REGARDING NUCLEAR SAFETY for NUCLEAR POWER PLANT LOCATIONS article 4. The principles in assessing the location 1. The location is suitable for the construction of NPP, if satisfies following conditions simultaneously: a) Has the ability to ensure the safety of NPP in normal operating conditions as well as when the incident occurred in the design;
b) have the ability to ensure for the people and the environment is not affected by the harmful radiation during normal operating conditions as well as when the incident occurred in the design;
c) restrictions are harmful effects to humans and the environment in case of the problem exceeds the included in design (hereinafter the incident beyond design).
2. When assessing the location of NPP must fully research survey, the elements, the following characteristics: a) The natural and artificial factors likely to impact from the outside to safety of NPP;
b) The characteristics of the location and the environment related to the spread of radiation from damaging of NPP for humans and the environment;
c) density, population distribution and the characteristics of the area related to the ability to perform incident response measures.
3. where the assessment as specified in paragraph 2 this shows the location of one of the characteristics below then the location cannot be accepted: a) Has active fault;
b) capable of ground vibration caused by the earthquake, with a background of maximum acceleration (PGA) achieved values from 360 cm/s2 upward, with 10,000-year repeat cycle;
c) Are developing or have karst karst create funnels a diameter larger than 20 m on the ground.
4. where the assessment as defined in paragraph 2 of this Article shows that, in addition to the specifications prescribed in paragraph 3 of this article, the site also has other adverse conditions could not be overcome by measures designed, protective solutions or administrative regulations, the location cannot be accepted.
Article 5. Survey and research on the location 1. Conduct surveys, study the characteristics of the venue, the relevant factors and determine the level of harmful according to the following rules: a) survey, the study characteristics of the location has the ability to influence of NPP's safety, including: earthquake, the fault surface, volcanoes , meteorology, flood, tsunami, engineering geology, the elements due to human activity caused, sources of water supply for power and cooling of NPP;
b) data collection, history, measured records data about the number and seriousness of the phenomenon, natural events that are important to the evaluation of safety of NPP location. For meteorological, seismic, hydro, recording of measuring data must be not older than 5 years as of the time of submission of the proposal to approve the location, including the figures of at least 12 months continuous measurement recording and ensure the reliability, accuracy, completeness of the data recorded and measured;
c) predicts a change of characteristics likely to affect the safety of NPP in the period at least equal to the expected activity period of NPP's;
d) survey, research and determine the frequency of hazardous levels of natural and artificial factors likely to affect the safety of NPP;
DD) using the appropriate methodology to determine the level of harmful elements likely to affect the safety of NPP. The method used is advanced and proven to be consistent with the characteristics of the survey area, reviews;
e) using the specific data related to location in order to determine the level of harm. The case does not collect specific data regarding the location of NPP, may use the data of other places have characteristics proved to be equivalent to the characteristics of the location of NPP;
g) When prospecting, researching the characteristics specified in point a of this paragraph, must choose to use the parameter, the parameter values match the determination of hazardous levels of service for the design of NPP;
h) the scope of the survey area, research, determine the extent of the natural and man-made elements must be proven to be large enough to cover all the important features for identification of hazardous levels of phenomena, events and match the specific method used.
2. When the survey, research to select and evaluate locations must apply the standards of Vietnam. With regard to the content of that standard Vietnam yet, incomplete or not yet ensure harmony shall apply the standards of the foreign competent authority to apply.
3. Activities and survey results, research must be established as records to keep and the competent State agencies when the proposal to approve the location of NPP.
Article 6. The influence of the nuclear power plant 1. The survey, the study of environmental factors affecting ability to disperse radioactivity from of NPP including radioactive dispersal through the air, surface water and groundwater. The scope of the survey area, research depends on the ability to disperse radioactivity in case of normal operation of NPP as well in case there is trouble.
2. Determine the impact of radiation for humans and the environment based on the basic design and the amount of radiation emitted in the case of the normal operation of NPP as well in case there is no need to perform incident response plan.
3. Identify and evaluate the way radioactive dispersal directly and indirectly from of NPP, the scope of the area in which humans and the environment are likely to suffer harm. The identification and assessment is made on the basis of the characteristics of the area, paying attention to the characteristics of the biosphere related to the accumulation and transport of radioactive nuclei.
4. Reviews of places in relation to the basic design of the NHĐHN. The reviews are sufficient grounds for the conclusion that irradiation doses, caused by the air for radiation workers and the public are limited to the lowest level that can be achieved in a reasonable manner, does not exceed the limit prescribed by law.
Article 7. Population characteristics and incident response plans 1. Research reviews characteristics and population distribution at present and in the future in the area is likely affected by the spreading of radioactivity from of NPP. The study, evaluation must include the assessment of land use, water and put in relation with the characteristics have the characteristics related to the level of radioactive dispersal that cause harm to humans.
2. Research, ability to set the response to incidents around the location of NPP on the basis of the results of research, reviews the provisions in clause 1 of this article and the characteristics related to the implementation of the incident response plan, so that the dose of radiation caused by the plant to the public do not exceed the limit prescribed by law.
Article 8. Security monitoring The observation of these factors, the characteristics of the relevant locations to ensure the safety of NPP, for humans and the environment are performed throughout the life cycle of the plant, including the monitoring of the increase and population distribution.
Article 9. Quality assurance and testing, inspection, research and survey operations, data collection 1. The owner and the bodies, related institutions, when conducting surveys, research, data collection for the evaluation service must implement the following provisions: a) establish and implement quality assurance programs, specifically noted the activities likely to affect the safety and determining the parameters as a basis set design;
b) Submitted plans to conduct surveys, research, data collection related to nuclear safety requirements for location of NPP Safety Agency for radiation and nuclear.
2. radiation safety agency and is responsible for nuclear inspections, the Inspector of survey activities, research, collecting material related to nuclear safety requirements for location of NPP as prescribed by law.
Chapter III surveys, REVIEWS of NATURAL CONDITIONS and HUMAN ACTIVITIES RELATED to article 10. The earthquake, the fault surface, volcanoes

1. hazard assessment of vibration induced by earthquake ground for location, taking to the tectonic and seismic characteristics of the special conditions of the ground. Perform analysis of the reliability of the results of the reviews.
2. Research, reviews the evidence about the fault activity, the possibility of volcanic activity and the level of hazardous of them for safety of NPP. The reviews are done by the methods and survey research, detailed enough to be able to make reasonable decisions.
Article 11. Meteorology 1. Survey research, meteorological parameters and the extreme meteorological phenomena likely to affect the safety of NPP including: lightning, Gust, storms and other meteorological phenomena.
2. The survey results, research must be adequate and appropriate for the purposes of NPP design, including the assessment of the probability of occurrence of extreme meteorological phenomena have parameters exceed design details.
Article 12. Flooding flooding assessment in place according to the following rules: 1. Determine the cause by one or a combination of the natural phenomena, including: heavy rain, rising tide, tide, ocean waves, flood and other phenomena. The case has the potential for flooding affecting the safety of NPP it must collect, observation, analysis of meteorological and hydrological data required, including collect, analyze historical data. For historical data, to review the relevance and reliability of the data for the assessment of the location.
2. Analysis of data concerning the structure of the regulatory system of water resources at the upstream has contributed to the possibility of flooding.
3. Construction of meteorological, hydrologic model fit are the limitations on the accuracy and the amount of data, the limitations of time collecting data and changes in the past of relevant characteristics in the area.
Article 13. Tsunami 1. General review of the relevant area to determine the possibility of tsunamis affecting the safety of NPP. Where there is the possibility of a tsunami affecting the safety of NPP it must collect, record, analyse the seismic data, seismic tectonics needed, including data collection, analysis, history. For the prehistoric, historic data, to review the relevance and reliability of the data for the assessment of the location.
2. On the basis of the data collected and compares that area with the area having similar characteristics have been studied adequately about the tsunami phenomenon, reviews the frequency happens, destructive and the height of the tsunami to identify hazardous levels, taking to the sea coast features increase the hazard.
3. Modeling the effects of the tsunami match there as the limitations on the accuracy and the amount of data, the limitations of time collecting data, evaluate the influence of NPP's safety under the different scenarios.
Article 14. Engineering geology 1. Ability to destabilize the slopes, the landslide of rocks affect the safety of NPP. The case potentially destabilize slopes affecting safety of NPP must then determine the level of harm, using the parameters and values background vibration characteristic of the area.
2. lifting ability, subsidence surface location due to the natural and artificial elements such as karst formations, caves, mines, water wells, oil wells on the basis of geological maps and the appropriate data.
3. Evaluating the possibility of liquefied soil at the location on the base using the parameters and the value soil vibration. Use the terrestrial survey methods and suitable methods of analysis to determine the level of background soil liquefaction of NPP.
4. technical characteristics of the ground, and the chemical properties of groundwater must be surveyed, research. The layers of rock in the place must be identified and described as suitable for the purpose intended. The stability of the Foundation under the action of static loads and seismic loads must be evaluated.
Article 15. The elements due to human activities cause 1. Ability to crash in the place of NPP and hazardous levels, taking into account the frequency and characteristics of current and future aircraft. The case likely to crash at the venue must then determine the level of harm with respect of NPP.
2. Identify the activities in the area are related to the processing, storing, transporting of chemicals capable of causing explosions or create explosive gas. Determine the extent of harm caused by explosive chemicals, including effects due to toxic and causes pressure, taking into account the distance to the location.
Article 16. Power and cooling water for the nuclear power plant 1. Reviews of the places related to water supply for cooling of NPP, including: a) the temperature and the humidity of the air;
b) water temperature;
c) water source with the data on the flow of water reserves, at least, about the time that water supplies in reserve of at least, have to regulate the structure of water.
2. Determine the cause do decline or change the nature of NPP for cooling water source due to natural or human-induced activities such as change or block the flow of the River, making the water reservoir viaduct, arises a too large impurities or marine, oil spill, fire.
3. Determine the power source for the structures, systems and components important to the safety of NPP.
Chapter IV survey, ABILITY to DISPERSE RADIOACTIVITY FROM NUCLEAR POWER PLANTS that AFFECT the PUBLIC in article 17. Radioactive dispersal through the air 1. Meteorological Research, surveys and other relevant factors, including: the terrain, the phenomena and basic meteorological parameters such as rainfall, humidity, wind speed and direction, air temperature, stability and perturbation of the air.
2. Perform the observation program in place and the related areas of service for the evaluation of radiation dispersal through the air. Using monitoring devices capable of recording the measurement of meteorological parameters at the appropriate level and location. Determining the monitoring area and the most recent monitoring equipment depends on the terrain characteristics, atmospheric. In addition to monitoring data, to collect meteorological data available in other sources.
3. Assess the dispersal of radiation through the air on the basis of use of the data collected and distributed to the appropriate model. The dispersal pattern of the topographic characteristics of the area concerned and place affect the dispersal of radiation through the air, the characteristics of the basic design.
Article 18. Radioactive dispersal through surface water 1. The survey, the study of characteristics of surface water in the area related to radioactive dispersal ability through the water surface, including the natural and artificial water sources, the main structures used for the control of water resources, the location of the installation of water structure and the use of surface water resources in the area.
2. Perform surveys, surface water studies to determine the possibility of dilution and diffusion of water sources, the ability to concentrate and sediment transport mechanisms, creatures of radioactive nuclei in the hydrosphere and the way of causing radiation exposure.
3. Evaluate the influence of surface water contaminated with radiation for the population on the basis of use of the data collected and distributed to the appropriate model.
Article 19. Radioactive dispersal through groundwater 1. The survey, the study of characteristics of groundwater in the area related to the ability to disperse radioactivity through underground water, including characteristics of water sources, interactions with surface water and groundwater use in the area.
2. Perform surveys, the study analyzes the characteristics of groundwater to assess the mechanism of transport of radioactive nuclei. This program should include surveying, research characteristics of soil, water, physical and chemical properties of the material in the soil related to the mechanism of human transportation, accumulation of radioactivity in groundwater and pathway cause radiation exposure.
3. Evaluate the influence of groundwater contaminated with radiation for the population on the basis of use of the data collected and distributed to the appropriate model.
Article 20. Population distribution and radiation font 1. Identified data on population distribution based on the latest census and extrapolate to current and future data for regions where the population is likely affected by radioactive dispersal. If there is not enough reliable data to conduct the survey, the study added. The data must be analyzed to determine population distribution according to the direction and distance of NPP. Evaluate the effects of the radiation for the population in terms of normal radioactive emissions and in case of a problem, including the problem particularly severe, have the characteristic parameters of location.
2. evaluation of atmospheric radiation font, hydrosphere, lithosphere and biology in the area as the basis for determining the influence of radiation of NPP in the future.
Article 21. Irradiation dose limit for the public on the location selected must ensure: 1. In the case of the normal operation of NPP, the dose of radiation caused by the plant to the public do not exceed the limit prescribed by law.
2. In case of incidents, incident response plan can be made to the dose irradiation caused by the plant to the public do not exceed the limit prescribed by law.
Chapter V ENFORCEMENT PROVISIONS Article 22. Effect 1. This circular effect since January 15, 2011.
2. During the implementation process, if there are obstacles, suggest that the agencies, organizations, individuals in timely reflections on Science and technology for consideration of additional amendments.