【正文】 description of the hazards 畢業(yè)論文 and risks of lack of depth , evaluation of objects of different types of evaluation results are not parable。 ⑥ labor administrative department to confirm the other risk, risk factors, large construction projects. (2) security evaluation and acceptance Safety and acceptance in the construction project evaluation is pleted, the test works correctly, through the facilities of construction projects, equipment, devices and management of actual health status of the safety assessment of construction projects put into operation to find the existence of dangerous and harmful factors to determine the extent of and to make reasonably practicable the safety countermeasures and suggestions. (3) evaluation of safety status Security status of device evaluation, also known as inservice safety assessment, for a certain production units (enterprises) in general or local production and business activities of the security status of safety evaluation, to find the existence of dangerous 畢業(yè)論文 and harmful factors and to determine its extent, proposed: reasonably practicable the safety countermeasures and suggestions. (4) special safety evaluation Special safety assessment for a particular activity or place, and a specific industry, products, production methods, production process or production unit, presence of dangerous and harmful factors in the safety evaluation, to find the existence of dangerous and harmful factors to determine the extent feasible and reasonable security countermeasures and suggestions. Such as the 2021 State Administration of Work Safety to carry out a special safety assessment of dangerous chemicals. 2. Quantify the degree of classification based on the evaluation (1) qualitative evaluation Qualitative evaluation is mainly based on experience of the production system technology, equipment, environment, personnel, management and other aspects of the security situation in qualitative judgments. Qualitative evaluation does not quantify the risk of treatment, only for qualitative parison. Qualitative evaluation using systems engineering approach to depose the system, relying on evaluation of personnel, the ability to observe and analyze, by means of the relevant regulations, standards, norms, experience and ability to judge for evaluation. Belong to this type of evaluation methods have safety checklist (Safety Check List, abbreviation SCL), prerisk analysis (Preliminary Hazard Analysis, abbreviation PHA), fault type and impact analysis (FailureMode Effects Analysis, abbreviation FMEA), risk and operability study (HazardandOperabilitySmdy abbreviation HAZOP) and other methods. Such method is characterized by simple, easy to grasp, easy to operate, the results of the evaluation process and intuitive, you can clearly express the equipment, facility or system39。 ② the production of fire risk category A of the Project。 ② predict failures caused by mistake or dangerous。 China39。s behavior safety evaluation, equipment, facilities, and the safety evaluation of operational environment safety evaluation, chemicals safety evaluation, etc. This paper mainly USES the inherent risk degree of qualitative and quantitative analysis and qualitative and quantitative analysis of risk degree method. Through a series of safety evaluation methods and the corresponding safety evaluation results. If use the word of fire and explosion chemical panies to oxygen index method for coal and device of fire and explosion danger level evaluation, and the corresponding safety coefficient of pensation, also used in advance within the risk analyzedof mon accident is analysised, and the accident potential danger. General business or other units in the set up, or running for safety evaluation is required. The main purpose is based on the production or the case of the proposed project, the safety evaluation by the appropriate agency for evaluation of divisionsite inspections for safety deficiencies, and gives corrective measures required by the business for rectification, to achieve safe production purposes. Evaluate the situation according to business division safety evaluation report prepared by the Work Safety 畢業(yè)論文 Supervision Bureau for approval after examination and approval procedures as a business for a variety of important assessment into the safety preevaluation (before the establishment of the project), safety evaluation and safety inspection evaluation of the status quo. Products or byproducts in which dangerous chemicals have to preevaluation and acceptance main purpose of safety evaluation is to help panies identify security deficiencies, provide security services, and approval by the local safety supervision bureau to obtain legal procedures. Safety evaluation in prevent, reduce accidents, reduce disaster losses and the cause of the accident analysis of various aspects play an important role in safety evaluation has been increasingly included in national legislation, standards, and relevant norms of international anizations terms. 1. The status of safety assessment (1) The safety assessment has bee a construction project, a work must be carried out . projects have important safety evaluation. Japan39。 4．根據(jù)評價性質(zhì)進行分類 (1)系統(tǒng)固有危險性評價 畢業(yè)論文 固有危險性是指由系統(tǒng)的規(guī)劃、設(shè)計、制造、安裝等原始因素決定的危險性，即系統(tǒng)投入運行前已經(jīng)存在的危險性。 (3)人的行為的安全性評價 對人的不安全心理狀態(tài)和人機工程要點進行 行為測定，評定其安全性。評價自開始起就用指標值給出，使得評價后期對系統(tǒng)的安全改進工作較困難。E1)評價法、英國帝國化學(xué)公司 (ICI)蒙德 (Mond)分部火災(zāi)、爆炸、毒性指標評價法、日本勞動省化工廠安全評價六階段法、我國的化工廠危險程度分級方法等安全評價方法。但是，這種方法要求數(shù)據(jù)準確、充分，要求分析過程完整，判斷和假設(shè)合理，對于化工、石油化工等行業(yè)，由于系統(tǒng)復(fù)雜、不確定因素多、人員失誤概率的估計十分困難，因此至今未能取得很大進展。 ① 概率風(fēng)險評價方法 它是根據(jù)零部件或子系統(tǒng)的事故發(fā)生概率，求取整個系統(tǒng)的事故發(fā)生概率。其缺點是：評價結(jié)果不能量化；評價結(jié)果取決于評價人員的經(jīng)驗，含有相當(dāng)高的經(jīng)驗成分；對同一評價對象，不同的評價人員可能得出不同的評價結(jié)果；