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Zhejiang Zhangda Light Industry Machinery Factory



Description


1。 The acceptance report is for Zhejiang Zhangda Light Industry Machinery Factory to organize quality inspection office, technical department, radiation safety leading group and other members according to the approved welding evaluation report requirements and the experts of Wenzhou Environmental Protection Bureau on March 2, 2018。 The acceptance of the opinion was carried out。

2. The acceptance report is in duplicate, one for each archive and one for the Environmental Protection Agency of the Economic and Technological Development Zone.


Table 1: Basic information

Acceptance basis:

斗地主达人1) Interim Measures for Environmental Protection Acceptance of Construction Projects Completion, National Environmental Assessment [2017] No. 4, starting from November 20, 2017.

2) "Environmental Protection Law of the People's Republic of China", Presidential Decree No. 9 of the People's Republic of China, starting from January 1, 2015.

3) Law of the People's Republic of China on Prevention and Control of Radioactive Pollution, starting in October 2003.

斗地主达人4) Regulations on Environmental Protection of Construction Projects, Order No. 253 of the State Council, starting from November 29, 1998.

5) Regulations on the Safety and Protection of Radioisotopes and Radiation Devices, Order No。 449 of the State Council, from December 2005。

6) "Regulations on the Management of Radiation Environment" State Environmental Protection Administration Order No. 3, from 1990 onwards.

7) Technical Specifications for Radiation Environmental Monitoring, HJ/T 61-2001

8) Technical Requirements for Completion Acceptance Inspection of Environmental Protection Facilities of Construction Projects, State Environmental Protection Administration, 2000.

9) Measures for the Administration of Safety Permits for Radioisotopes and Radiation Devices, Order No. 31 of the State Environmental Protection Administration (revised in 2008).

10) Regulations on the Administration of Safety and Protection of Radioisotopes and Radiation Devices, No。 18 of the Ministry of Environmental Protection。

11) "Measures for the Management of Radiation Environment in Zhejiang Province", Zhejiang Provincial Government Order No. 289, 2012.

12) “Zhejiang Zhangda Light Industry Machinery Factory Industrial Flaw Detection Device Application Project Environmental Impact Report Form”, Zhongfu Environmental Technology Co。, Ltd。, No。 ZFHK-FB17220068, September 2017。

13) Letter on the Approval of the Environmental Impact Report Form for the Industrial Flaw Detection Device Application Project of Zhejiang Zhangda Light Industry Machinery Factory Wenhuanfu [2017] No.13.


Execution criteria, label, level:

The acceptance execution criteria are consistent with the EIA standards, namely:

斗地主达人(1) National Standard of the People's Republic of China, "Basic Standards for Protection of Ionizing Radiation and Safety of Radiation Sources", (GB18871-2002)

This standard applies to the protection of ionizing radiation exposure and the safety of sources in practice during practice and intervention.

B1 dose limit (Standard Appendix B)

B1.1 occupational exposure

B1.1.1 Dose limit

B1.1.1.1 The occupational exposure level of any staff member shall be controlled so as not to exceed the following values:

a) The annual average effective dose for five consecutive years as determined by the regulatory authority (but not for any retrospective average), 20 mSv;

This project takes 20mSv as the management limit for professional staff.

B1。2 Public exposure

B1。2。1 Practice The average dose estimates received by members of the public regarding key population groups should not exceed the following limits: a) annual limited dose, 1 mSv; b) in exceptional cases, if 5 consecutive years If the annual average dose does not exceed 1 mSv, the effective dose in a single year can be increased to 5 mSv;

This project takes 1/4 of 1 mSv, or 0。25 mSv, as the management limit for members of the public。

(2) "Industrial Radiographic Radiological Protection Standards" (GBZ 117-2015)

This standard specifies the radiation protection requirements for industrial X-ray inspection room inspection, industrial X-ray CT inspection and X-ray field inspection.

斗地主达人This standard is applicable to the inspection work carried out by industrial radiographic inspection devices (hereinafter referred to as X-ray devices or flaw detectors) below 500Kv.

4.1 Protection and safety requirements

斗地主达人4.1.1 The setting of the inspection room should fully consider the surrounding radiation safety. The operation room should be separated from the inspection room and avoided as much as possible.

The direction in which the wire harness is illuminated。

4。1。2 Partition management should be implemented for the testing workplace。 Generally, the inner area enclosed by the wall of the inspection room is classified as control。

The area, adjacent to the outside of the wall, is designated as a supervised area。

斗地主达人4。1。3 The radiation shielding of the X-ray inspection room wall and the entrance door shall simultaneously satisfy:

a) The weekly dose reference control level of the person concerned is no more than 100μSv/week for the professional staff and no more than 5μSv/week for the public;

bμSv/h。 b) The highest peripheral dose equivalent rate reference control level is not more than 2. 5μSv / h.

4.1.4 The radiation shielding at the top of the inspection room shall meet:

a) The radiation shielding requirements of the roof of the inspection room are the same as that of the built-in building, the proposed building or the adjacent building next to the inspection room in the solid angle from the radiation source point to the edge of the inner surface of the inspection room。 。 3;

b) For the top of the inspection room where no personnel are required to reach, the dose rate reference control level at 30 cm from the outer surface of the inspection room is usually taken as 100 μSv/h.

4.1.5 The door-to-machine interlocking device shall be provided in the inspection room and ensure that the X-ray device can perform the inspection after the door (including the personnel door and the cargo door) is closed. X-ray exposure should be stopped immediately when the door is opened, and X-ray exposure cannot be automatically started when the door is closed. The door-to-machine interlocking device should be set so that the personnel inside the room can easily leave the inspection room in an emergency.

4.1.6 Indicators and audible prompts indicating “prepared” and “illuminated” status shall be provided at the entrance and inside of the inspection room. The “preparation” signal should be continued for a sufficient amount of time to ensure safe evacuation of personnel inside the inspection room. The “prepared” and “illuminated” signals should be clearly distinguishable and should be significantly different from other alarm signals used in the workplace.

4.1.7 The illumination status indicating device shall be interlocked with the X-ray inspection device.

4。1。8 There should be a clear description of the meaning of the “preparation” and “irradiation” signals at the indoor and outdoor eye-catching locations。

4.1.9 There should be an ionizing radiation warning sign and Chinese warning instructions on the protective door of the inspection room.

4.1.10 Emergency stop button or drawstring should be installed in the inspection room to ensure that the emergency can be stopped immediately in the event of an emergency.

The button or drawstring should be installed so that the person is not required to pass through the main beam when using it anywhere in the inspection room. Buttons or drawstrings should be labeled to indicate how to use them.

4。1。11 The inspection room shall be provided with mechanical ventilation, and the outer outlet of the exhaust duct shall be avoided towards the densely populated area。 The number of effective ventilation per hour should be no less than 3 times。

4.2 Safety operation requirements

4.2.1 When a flaw detection worker enters the inspection room, in addition to wearing a conventional personal dosimeter, a personal dose alarm should be provided. When the radiation level reaches the set alarm level, the dosimeter alarms, the inspection staff should immediately leave the inspection room, and prevent others from entering the inspection room, and immediately report to the radiation protection person in charge.

4。2。2 The radiation level of the area surrounding the inspection area or the ambient dose equivalent rate of the environment shall be measured periodically, including the operator's working position and the location of the person in the adjacent area。 The measured value should be compared to the reference control level。 When the measured value is higher than the reference control level, the flaw detection work should be terminated and reported to the radiation protection person in charge。

4。2。3 Before using the dosimeter or shifting the meter, check that the dosimeter is working properly。 If the dosimeter is not working properly during the inspection, the inspection should not begin。

4.2.4 Detective workers should use the appropriate radiation protection devices, such as collimators and additional shielding, to minimize potential radiation.

4.2.5 Prior to each exposure, the operator should verify that no personnel are present inside the inspection room and that the protective door is closed. The inspection can only be started if the protective door is closed and all protection and safety system are activated and functioning properly.

4.2.6 Unexpected work during the design of the inspection room. If the workpiece is too large, it is necessary to open the door for inspection. 5.1.

3, 5. 4, 5. 5 requirements.

Evaluation of results:

Under the rated working conditions of the X-ray flaw detector, the radiation level around the inspection room complies with the requirements of 4.1.3 and 4.1.4.

The safety measures such as the door-to-machine interlocking device and the beam signal indicator light in use in the inspection room are all in compliance with the requirements of 4。1。5 to 4。1。10。 The company undertakes to use only one device for each flaw detection。 Each device is protected from a door-to-machine chain when multiple devices are used。

(3) "Specifications for Radiation Shielding of Industrial X-ray Inspection Room" (GBZ/T250-2014)

This standard specifies the shielding requirements for industrial X-ray inspection rooms.

This standard applies to the inspection room of industrial X-ray inspection equipment below 500kV。

3.2 Radiation requiring shielding

3.2.1 The entire wall of the corresponding useful harness is considered to be useful for wire harness shielding, without regard to entering the useful harness area.

Scattering radiation.

3。2。2 Scattering radiation Consider 90° scattered radiation from a workpiece that is incident at 0°。

3。2。3 When there is a possible combination of leakage and scattered radiation, the leakage radiation and the various scattering radiation are usually estimated separately

Shots, when their shield thickness differs by a value layer thickness (TVL) or greater, use a thicker shield. When the phase difference is less than one TVL, add a half-value layer thickness (HVL) to the thicker shield. .

3.3 Other requirements

3.3.1 The inspection room should generally have a personnel door and a separate workpiece door. For small workpiece inspection rooms that can be manually transported for inspection, only personnel doors can be provided. The door of the inspection room should be in the form of a lost road.

3。3。2 The control room of the flaw detection device should be placed outside the inspection room。 The control room and personnel door should avoid the direction of the beam irradiation。

3.3.3 Shielding design should consider the shielding of gaps, pipe holes and weak links.

3.3.4 When multiple X-ray inspection devices are used in the inspection room, the shielding is designed according to the maximum tube voltage and the common maximum tube current corresponding to the tube voltage.

3。3。5 The structure of the inspection room, the construction cost and the space occupied should be considered。 The commonly used materials are concrete, lead and steel plate。

5.1 Typical conditions

Typical conditions for flaw detection in the inspection room are as follows:

a) The dose rate control value outside the 30 cm inspection surface is 2。5 μGy/h。

b) The X-ray tube current (I) is 5 mA, and the angle between the central axis of the conical beam and the cone boundary of the X-ray inspection device is 20. .

c) The dose rate of the leakage radiation of the X-ray flaw detector at 1 m from the target point is shown in Table 1.

5。2 Typical shielding thickness table of inspection room

Under typical conditions of 5。1, different kilovolts of X-rays are useful for harnesses, leakage radiation, and 90。 Required for scattered radiation shielding

The required lead and concrete thicknesses are listed in Table 1-1, Table 1-2 and Table 1-3.

现主体墙任意方向为混凝土500MM厚,铅门厚度为12MM厚,屋顶与迷道外侧墙厚300MM,符合规定,采用的混凝土密度为2.4-2.5的C30标号混凝土。

(4)《职业性外照射个人检测范围》GBZ 128-2002


表二项目概况和环保设施运行情况

2.1工程基本情况

浙江章达轻工机械厂成立于1994 年,原位于温州经开区沙城街道大郎桥西路22 号,是设计、开发、制造、工程安装及提供完善售后服务于一体,专业生产葡萄酒、白酒、饮料、啤酒、生物发酵、中西制药、精细化工等成套工程及高精度流体设备的企业,是中国食品工业用不锈钢薄壁容器领域专业制造厂家。公司为扩大产能,在温州市经济技术开发区滨海园区五道678 号新建一座厂房,进行淀粉衍生物设备及卫生流体配件的生产,于2018年1月在厂区内新建一间工业X 射线探伤室,约占地67.2m2,搬迁原厂区的2 台X 射线探伤机(1 台XXQ-2505 型定向和1 台XXH-2505 型周向探伤机),并新增一台XXQ-1605型定向探伤机(3台设备的最大管电压为250Kv,最大管电流为5mA).根据国家有关辐射环境管理的规定,企业于2017年7月委托中辐环境科技有限公司对该项目进行了辐射环境影响评价,2017年9月初编制完成,并于2017年9月14日通过温州市环境保护局的审批,2018年3月初项目取得辐射许可证并投入试运行,年生产日为100天,探伤机生产时间约为4小时,本次验收规模为3台X射线探伤机。设备技术参数见表2-1.

2。1。1 企业及探伤室地理位置

斗地主达人公司新建厂房位于温州市经济技术开发区滨海园区五道678 号,厂区东北面紧邻日中轻工和宁波港博机械有限公司,与探伤室的距离约50m;厂区东南面为下横河,与探伤室的距离约为84m,河对面是海桐路;厂区西南面现为空地;西北面为滨海五道,与探伤室的距离约为150m,隔路为空地。拟建探伤室位于厂房南端,探伤室东侧紧邻拟建焊接车间、南侧紧邻拟建锻压车间、西侧紧邻厂区的配电房和消防通道,北侧为车间内的道路。本项目50m 范围内无学校、医院、居民住宅等环境敏感目标。地理位置及周围环境示意图见附图1。

2.2工作原理

2.2.1探伤原理

The X-ray flaw detector is a detecting device that transmits and photographs an object by using X-rays. X-rays generated by the X-ray tube illuminate the X-ray film attached to the weld of the workpiece to be tested. When the ray passes through the crack, the attenuation is significantly reduced, the radiation received by the film is increased, and a film is produced on the developed film. The darker image shows where the crack is, and the X-ray flaw detector


According to this, the purpose of flaw detection is achieved.

The X-ray machine is mainly composed mainly of an X-ray tube and a high-voltage power source. The X-ray tube consists of a cathode and an anode sealed in a vacuum glass envelope, as shown in Figure 9.1-1. The cathode is a tungsten filament that is contained in a focusing cup. When the filament is energized and heated, the electrons "evaporate" out, and the focusing cup causes the electrons to be gathered into a bundle and fire directly onto the target embedded in the tungsten anode. The higher the filament current, the higher the temperature, the greater the amount of electrons emitted. A high voltage power supply is applied between the two poles of the X-ray tube to form an electric field between the two poles, and the electrons are accelerated to a high speed before being incident on the target. The target is generally made of a high atomic number refractory metal such as tungsten, platinum, gold or the like. High-speed electron bombardment of the target produces X-rays and a large amount of heat.

2。2。2 Detection process

The company's radiographic inspection is in a fixed exposure room。 The workpieces that need to be radiographically inspected are placed in the exposure chamber。 X-ray film is placed on the part to be inspected and numbered。 The inspection is correct, the staff evacuates the exposure chamber, and the work door is closed。 Then, according to the thickness of the workpiece, the part to be inspected, the nature of the inspection, etc。, the corresponding tube voltage, tube current and exposure time are adjusted, and the exposure is performed without any error。 When the predetermined irradiation time is reached, the power is turned off。 After the full exposure film is completed, the worker enters the exposure room, opens the workpiece door and sends the flaw detection workpiece out of the exposure chamber, and removes the exposed X piece from the flaw detection workpiece。 After the dark room is processed, the film is given and the flaw detection is completed。

2.2.3 Pollution factors

2.2.3.1 X-ray

The flaw detector of this project is a II-ray device. It is known from the working principle of the X-ray device that the X-ray is generated and disappeared by the opening and closing of the random device. The X-ray flaw detector used in this project will emit X-rays only when it is turned on and in the outgoing state (exposure state). Therefore, during the boot exposure, X-rays become a major factor in polluting the environment.

(1) Normal working conditions

The X-ray flaw detector has no radiation when it is stopped. Only in the course of work, due to the direct X-rays and the scattering of the reflector, it may have a radiation effect on the staff of the attachment and the surrounding public, by X-ray external irradiation. During the exposure process of the X-ray flaw detector, after the X-rays are shielded by the relevant radiation protection of the inspection room, the X-rays are basically shielded in the inspection room, which has less radiation impact on the workplace and the surrounding environment.

(2) Accident conditions

The radiation device used is a Class II radiation device, and the following three situations can occur in the accident conditions:

A。 When the X-ray machine takes a picture of the workpiece, the door interlocking device fails, the worker mistakenly enters the inspection room to receive additional illumination; or the lead door is not completely closed, causing the X-ray to leak outside the inspection surface, giving People around the activity cause unnecessary exposure。

B. The personnel stayed in the inspection room and have not completely withdrawn. The X-ray machine began to inspect the workpiece, causing the staff to receive additional exposure.

斗地主达人C, artificially caused by the illumination.

2.2.3.2 Exhaust gas

When the X-ray flaw detector is turned on, the air is decomposed under the action of X-rays to generate a small amount of harmful gases such as ozone and nitrogen oxides, and is ventilated through the ceiling exhaust device (the number of ventilations in the inspection room is not less than 3 times/h). , harmful gases have less impact on the environment.

2.2.3.3 Waste water, solid waste

The waste (fixed) shadow liquid and film produced during the X-ray inspection process belong to the HW16, a photosensitive material waste in the National Hazardous Waste List. It is non-radioactive and is expected to produce 30kg per year. It is regularly entrusted to companies with hazardous waste treatment qualifications.

The X-ray flaw detector does not produce any other waste when it is in operation.

2.2.4 Operation of environmental protection facilities

During the test run, the door-to-machine interlocking device of the inspection room can effectively realize the safety of the personnel when the door is not closed or opened during work, or the person in the inspection room presses the emergency stop button to cut off the power of the ray machine。 In the inspection room, there is a blower in the elbow connection room。 When the inspection room closes the door, it starts pumping work and continues to work after the radiation exposure to meet the requirements of the EIA document for exhaust gas treatment。 The enterprise is equipped with collection waste in the dark room。 The liquid storage tank (plastic, development, fixing separately stored) and anti-leakage measures, and signed a hazardous waste and waste film processing agreement with Wenzhou Xinpeng Renewable Resources Co。, Ltd。, did not violate the law and deal with itself。

3.1 Comparison of the contents of the EIA with the actual situation (table):

Table 4 (test instrument and test report omitted)

斗地主达人Dose estimation formula:

斗地主达人According to the calculation formula in the EIA report (Appendix A of the UNSCEAR-2000 report), calculate the annual effective dose of external exposure generated by X-ray:

HEr = H × t × 10-3 (mSv / a)

斗地主达人 Where: HEr: X-ray external exposure per capita annual effective dose equivalent, mSv / a;

H: dose rate of concern, μSv/h;

t : X-ray irradiation time, h / a.

Staff additional dose:

X-ray inspection room staff are exposed to radiation mainly from X-rays that leak into the environment at startup.

It can be seen from Table 4-2 that the X-radiation dose rate of the working position does not increase after the start-up, and is within the fluctuation range of the background value. Therefore, the additional annual effective dose received by the staff under normal conditions is negligible.

Analysis of exposure doses of other staff members and members of the public:

When the X-ray flaw detector is turned on, the work warning light is turned on and there is a voice broadcast, and other staff in the workshop are advised not to stay around the inspection room。 The enterprise has established a strict management system, and members of the public are generally not allowed to enter the plant area。 Therefore, other personnel and public personnel in the workshop will not receive additional radiation exposure, so it complies with the Basic Standards for Protection of Ionizing Radiation and Radiation Sources (GB18871-2002)。 Requirements for "dose limits"。


Table 5 Radiation dose

Dose estimation formula:

According to the calculation formula in the EIA report (Appendix A of the UNSCEAR-2000 report), calculate the annual effective dose of external exposure generated by X-ray:

HEr = H × t × 10-3 (mSv / a)

Where: HEr: X-ray external exposure per capita annual effective dose equivalent, mSv / a;

H: dose rate of concern, μSv/h;

t : X-ray irradiation time, h / a。

Staff additional dose:

斗地主达人X-ray inspection room staff are exposed to radiation mainly from X-rays that leak into the environment at startup.

It can be seen from Table 4-2 that the X-radiation dose rate of the working position does not increase after the start-up, and is within the fluctuation range of the background value. Therefore, the additional annual effective dose received by the staff under normal conditions is negligible.

Analysis of exposure doses of other staff members and members of the public:

When the X-ray flaw detector is turned on, the work warning light is turned on and there is a voice broadcast, and other staff in the workshop are advised not to stay around the inspection room. The enterprise has established a strict management system, and members of the public are generally not allowed to enter the plant area. Therefore, other personnel and public personnel in the workshop will not receive additional radiation exposure, so it complies with the Basic Standards for Protection of Ionizing Radiation and Radiation Sources (GB18871-2002). Requirements for "dose limits".


Table 6 Environmental management and safety protection inspection results

According to the National Environmental Protection Environmental Assessment [2017] No。 4 Document, “Interim Measures for Environmental Protection Acceptance of Construction Project Completion”, Presidential Decree of the People's Republic of China No。 9 “Environmental Protection Law of the People's Republic of China”, State Council Order No。 449 “Safety of Radioisotopes and Radiation Devices” And Protection Regulations and the "Decision on Amending the Regulations for the Administration of Safety Permits for Radioisotopes and Radiation Devices" (Order No。 3 of the Ministry of Environmental Protection), "Administrative Measures for the Safety and Protection of Radioisotopes and Radiation Devices" (Ministry of Environmental Protection) Order No。 18), "Measures for the Administration of Radiation Environment in Zhejiang Province" (Provincial Government Order No。 289) and the requirements of the competent department of environmental protection shall use the management system and safety protection measures required by the EIA document and the EIA approval document。 To this end, the company organized the technical department, the quality inspection department, and the radiation safety team members as well as the qualified units of the foreign committee to inspect the radiation environment management and safety protection measures of the inspection room。


I. Organization


Zhang Kuiping, the corporate legal person (head of the unit) of Zhejiang Zhangda Light Industry Machinery Factory, is the person in charge of radiation work safety of the enterprise. At the same time, he has set up a leading group for radiation safety and protection management of the full-time organization, and appointed Zhang Qing to be responsible for the safety and protection of full-time ray.

Second, the safety management system


The enterprise has established a radiation protection management system, and the system specified includes:

1. Work system: The Radiation Safety and Protection Management System clearly establishes the work requirements for the account, the relevant system, the certificate holding, and the health management; the "radiation equipment maintenance and maintenance system" clarifies the periodic inspection of equipment and equipment. Work requirements such as maintenance and repair; The Radiation Workers Health Checkup and Training Program Program specifies the physical examination, safety training and assessment requirements for radiation operators.


2. Operating procedures: "X-ray machine operating procedures", clearing the precautions for the safe operation of the flaw detector; "Darkroom operating procedures", clearing the operating procedures of the darkroom and the precautions during the operation; "Safety and technical operation of the chamber" The Regulations clarify the precautions in the film area and the operation process.


3. Formulated the “Responsibilities for Radiation Jobs”: clarified the duties and tasks of the radiation workers and the precautions during work.


4. The rules and regulations formulated by the enterprise include the “Safety Operation System”, “Safety Measures for Radiation Prevention in Accidental Irradiation in Workplaces”, “Radiation Environment and Personal Dose Testing Plan”, “Regulations on Radiation Accident Management”, and “Emergency Plan for Radiation Accidents”. "The system of storage and use of ray machines".


斗地主达人 The above system has complied with the relevant requirements of the State Environmental Protection Administration Order No. 31: “Administrative Measures for the Safety of Radioisotopes and Radiation Devices”.


III. Implementation of management system and environmental protection measures


1. The person in charge of the unit Zhang Kuiping has signed the “Responsibility Letter for Radiation Work Safety”. The enterprise is responsible for the safety protection management of the radiation equipment in accordance with the requirements of national laws and regulations in the form of “Risk Work Safety Responsibility Letter”.


2. Engage in the education and training of radioactive staff. According to the production needs of the enterprise and the number of operators with qualifications to be equipped, there are 3 existing X-ray machines, but each time only one of them is selected for radiography according to the product, one class per day, 4 per class. Hours, 100 days a year, according to production needs, the company is equipped with 2 operators. The company's existing 3 radiation workers have passed the radiation safety and protection training organized by Zhejiang Radiation Environmental Monitoring Station or Zhejiang Guofu Environmental Protection Technology Co., Ltd., and obtained the certificate of qualification and obtained the certificate. Zhang Kuiping obtained the certificate of legal person radiation safety training.

斗地主达人4。 Safety inspection of the X-ray inspection room。 The operator should inspect the X-ray inspection room before and after each use and establish a record of inspection use。 After on-site inspection, the X-ray machine and the door interlocking device are all operating normally。


5. X-ray machine ledger. The account is basically complete, including the name, model, type, type, use, source and destination of the radiation device.


6. Wash the waste liquid. The company signed a hazardous waste treatment agreement with Wenzhou Xinpeng Renewable Resources Co., Ltd., and has already registered the annual processing volume and treatment agreement at No. 22 Dalangqiao West Road in the Environmental Protection Bureau. required

Waste treatment and transportation 5 joint order system。

Fourth, security protection

1. The protective walls around the inspection room are 500MM thick cast-in-place concrete walls, and the ceiling and the lost wall are 300MM thick cast-in-place concrete. The workpiece door and the staff entrance are all made of frame structure. The sliding door is laid with 12MM thick lead plates, and the overlap is more than 10 times the door gap to meet the radiation protection ability.

斗地主达人2。 There is a door interlocking device between the protective door of the inspection room and the X-ray machine。 Before all the protective doors are closed, the X-ray machine cannot be started without a power supply。 When the X-ray machine is working, the protective door is opened and the ray machine stops working immediately。 The door interlocking device operates normally and meets the radiation safety requirements。

3。 The inspection room is equipped with an air outlet to enhance the ventilation of the inspection room and reduce the concentration of indoor ozone and nitrogen oxides。

4, ionizing radiation signs, warning lights and cordon with "prepared", "in the middle of illumination" and language prompts。 The enterprise has obvious signs of ionizing radiation on the protective door and the X-ray device。 In the inspection room, the staff members are provided with a warning light with "preparation", "irradiation" and language prompts。 A warning line was set 1 meter away from the entrance door of the inspection room。

5, video surveillance system. In the inspection room, a camera is installed above the entrance door and diagonally, and the display is placed on the X-ray machine console to monitor any corner of the inspection room in real time, and the abnormality can be immediately stopped.

6, emergency stop device, in the inspection indoor wall is equipped with emergency stop button, the control cabinet has a short-circuit switch, press the switch, the ray machine can immediately stop working, the door for personnel access can be manually opened from the inside or outside, the motor of the workpiece door The button is in the inspection room to meet the requirements that the room can be opened when the person is turned off.

7, the exposure room area is about 67.2 M2, its length * width is 9.6 * 7 meters, height is 5.5 meters, no window design, with door interlock, door light interlock, X-ray machine cable through the bottom of the inspection room U-shaped The tube is connected to the outer control cabinet and meets the requirements of the environmental assessment.

V. Implementation of the safety assessment system

According to the requirements of the radioactive isotope and radiation device safety permit management measures, the radiation work unit shall prepare an annual assessment report on the safety and protection status of the radiation device, and report it to the local environmental protection department before January 31 of the following year. The annual assessment report shall include the radiation equipment ledger, the operation and maintenance of radiation safety and protective facilities, the establishment and implementation of radiation safety and protection systems and measures, accidents, emergency and file management, personal dose monitoring reports and annual protection test reports. Content, the above requirements, the company will be executed as required at the original No. 22 West Dalangqiao Road, and will be strictly enforced in the future.

Sixth, radiation safety permit

The enterprise has applied for a radiation safety license to the Wenzhou Environmental Protection Bureau as required. According to the provisions of Article 24 of the Measures for the Administration of Safety Regulations for Radioisotopes and Radiation Devices (State Environmental Protection Administration Order No. 31), the radiation safety license is valid for five years. If the validity period expires and needs to be extended, the continuation application shall be submitted to the original issuing authority before the expiration of the license. The enterprise will promptly complete the application for the renewal of the license.


Table 7 Conclusion

1. During the various stages of design, construction and trial operation of Zhejiang Zhangda Light Industry Machinery Factory, the national “three simultaneous” system for environmental protection of construction projects was basically implemented, and radiation protection was basically implemented during project construction. The environmental protection and the main project are designed, constructed and put into operation at the same time.

2。 On-site monitoring surface, under normal operating conditions, the X-radiation dose rate of each monitoring point around the inspection room is in compliance with the requirements of “Industrial Radiographic Radiological Protection Standards” (GBZ 117-2015) (see Appendix 2 of the report for details)。 )。 Radiation exposures received by radiation workers and the public are lower than their dose management limits, respectively, in line with the requirements of the Basic Standards for Protection of Ionizing Radiation and Radiation Sources (GB18871-2002)。

斗地主达人3. The on-site inspection results show that the company has formulated various radiation protection safety management systems.

4. The on-site inspection results show that the company's radiation protection management system and environmental protection measures have been basically implemented. The company's current on-the-job staff (Kong Weiwei, Tian Wancang, Zhang Qing) participated in the radiation safety and protection training, and obtained the certificate of certification. The number of certified employees is sufficient for the company's radiation work needs.


In summary, the construction project of X-ray inspection room of Zhejiang Zhangda Light Industry Machinery Factory basically meets the requirements for environmental protection acceptance.


Acceptance group: April 10, 2018


annex:

1. Wenzhou Environmental Protection Bureau Document, Wenhuanfu [2017] No. 13 "Letter on the Approval of Environmental Impact Report of Industrial Inspection Equipment Application Project of Zhejiang Zhangda Light Industry Machinery Factory"

2。 Radiation Protection Test Report of Zhejiang Dingqing Environmental Testing Technology Co。, Ltd。

3. Acceptance group member signature table


0086-577-868 21338

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Zhejiang Zhangda Light Industry Machinery Factory

Add: No. 678, 5th Binhai Avenue, Economic&Technological Development Zone, Wenzhou, Zhejiang, China, 325025

Tel:0086-577-868 21338

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