Chapter 5 Safety Technology

2)Decree No. 113/2004/NĐ-CP dated on April 16, 2004 Regulations on deal with violations against Labour law

3)Decree No. 169/2003/NĐ-CP dated on December 24, 2003 Geverment decree for Electrical safety

4)Decree No. 195/CP dated on December 31st, 1994 Government Decree “Decree on detailed regulations and guidelines on implementation of the Labour Law” about working time and rest time.

5)Decree No. 106 /2005/NĐ-CP “Decree on detailed regulations and guidelines on implementation of the Electricity Law” about safeguards of high voltage works.

6)Decision No. 41/2001/QĐ-BCN dated on August 30th ,2001 Decision of Minister of Ministry of Industry about safety of rural electricity network

7)Decision No. 2013/2005/QĐ-BLĐTBXH dated on December 29th, 2005 Regulations on safety technical verification procedure of machine, equipment

(3)Relevant safety regulations and standards are shown as follows in Vietnam;

Article 24. Registration of boiler, pressure tank and crane

The following regulations and standards must be referred to regarding this matter.

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-Boiler : QCVN 01 (2008) /BLĐTBXH Article 6.1 to Article 6.6 TCVN 7704 (2007) Article 11.1 to Article 11.5.

-Pressure vessel : TCVN 6156 (1996) Article 3.1 to Article 3.17

-Pressure pipe : TCVN 6159 (1996)

-Crane : TCVN 4244 (2005) Article 4.1to Article 4.3

6: Investigation (if necessary)

7: Confirmation of report (if necessary)

Figure 24-1 Process flow of registration of boiler and pressure vessel

Article 25. Inspection of safety protection system

1.There are safeguards for the entire area of a power plant and for each facility of power plant.

(1)There are the safeguard for the entire area of power plant, e.g. the automatic surveillance cameras furnished over the entire power plant area, surveillance by infrared rays, a speaker, locking device for entrance, lighting system, etc.

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(2) There are safeguards for the facility of power plant, e.g. an interlock system in the sequence diagram and mechanical lock system internally equipped in some power plant facilities, lock system of control board, power supply board, cubicle, and panel, etc., by key or padlock, and a protection system by the control sequence which includes a protection relay.

The lock systems are applied to the power plant facilities related to security of operationsuch as master control switch for unit operation,switchgear of circuit breaker (CB), disconnecting switch (DS), earthing switch (ES), servomotor of wicket gate, entrance door, CO2 cylinder, control valve for piping, etc.,

2.List of relevant existing regulations

1)Cicular No. 01/2011/TTLT BLDTBXH-BYT Guide to carry out safety and labor hygiene in production unit dated on January 10th 2011 of Ministry of Health and MOLISA.

2)Cicular No. 37/2005/TT-BLĐTBXH-BYT Guide to training on safety and labor hygiene dated on December 29th 2005.

3. Object apparatus (In case of Hydropower station)

1)Intake gate, tailrace gate, outlet gate, dam high-pressure drainage gate (If any)

2)Inlet valve of turbine (if any)

3)Servomotor of turbine wicket gate

4)Switchgear

5)Transformer

6)Fire extinguishing system

7)Emergency power supply unit and uninterruptible control power source unit

8)Power supply unit for emergency lighting

9)Ventilation equipment

10)Control and protective device: Protection of power plant (refer to Article 95)

4. Reference Technical Specification of Step-up Transformer in Son La HPP

Locking Facilities on the access doors

Locking facilities must be provided on the access doors to marshalling operating and terminalboxes or cabinets and cubicles

All locks and padlocks must be of brass and where fitted to access doors, are to be chromium plated. Where a set of locks is provided under any particular section of plant ofapparatus, an additional group master key must be provided

Locks must be designed, constructed and located on the equipment so that they will remain serviceable under the specified climatic conditions, without operation or maintenance for continuous periods of two years and with suitable maintenance must be fit for indefinite service.

The padlocks and keys are to be engraved with suitable identifying code or inscription. 5. Reference Technical Specification of Cameras system in Son La HPP

The camera supervising system is installed on each floor and outside of some locations and the main component are cameras, recorder, central control unit, computer, CRT monitor, etc.,

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prevent occupational accidents and infection in relation to items a) to e) of the above except item b).

2.Bearing appropriate responsibility by indirect staffs in charge of safety and hygiene

Method of bearing responsibility in case vioflating occupational safe and hygienic regulations must be depending on actual cases and must refer to civil law or criminal code in Vietnam.

Article 27. Investigation and report of accident

Occupational incident and accident means any incident or accident occurred on the facilities or workers in a power plant or a network facility during operation, maintenance and any occupational activities except.

Each case of accident or breakdown in equipment operationmust be investigated thoroughly and counted in statistics according to “investigation procedure” and “problem and abnormal phenomena listing procedure” of Ministry of Industry and Trade. When investigating, it is required to define the causes of accident and abnormal phenomena, and suggest timely prevention and remedy measures.

The accident report must describe the following information.

1.Report to Ministry of Industry and Trade

All accidents or incidents must be reported with the following information.

1)Name of power plant or network facility (e.g. AAA power plant, BBB substation)

2)Date and time of accident occurrence

3)Accident status information (detailed description of accident)

4)Cause of accident (tentative for initial report and investigation result for final report)

5)Effect to power supply (expected duration or record of power outage and its area)

6)Measures for solution on effect of accident

7)Measures for preventing similar accident

8)Other necessary information

2.Report to other authorities relevant to the power system operation

Industrial accident which effected power supply must be reported with the following information.

1)Name of power plant or network facility (e.g. AAA power plant, BBB substation)

2)Date and time of accident occurrence

3)Accident status information (brief or detailed description of accident depending on type of accident)

4)Cause of accident (tentative for initial report and investigation result for final report)

5)Effect to power supply (expected duration or record of power outage and its area)

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6)Measures for solution on effect of accident

7)Measures for preventing similar accident

8)Other necessary information

3.Report to Ministry of Labor, War Invalids, & Social Welfare

All human accident which caused injury or death of workermust be reported with the following information.

1)Name of power plant or network facility (e.g. AAA power plant, BBB substation)

2)Date and time of accident occurrence

3)Accident status information (detailed description of accident )

4)Cause of accident (tentative for initial report and investigation result for final report)

5)Measures for solution on effect of accident

6)Measures for preventing similar accident

7)Other necessary information

Article 28. Training of first-aid measure

All personnel who work in installation and repair of powerplants and network facilitiesmust be trained with first-aid measures for people who received an electric shock.

It is recommended to organize the training for all the personnel once a year together with other trainings for emergency cases.

-Sample of first-aid measures for people who received an electric shock is shown as follows ;

-Power supply must be shut off or breaker must be turned off .

-Electric cable must be cleared off by using rubber glove etc.

-Breathing and consciousness must be confirmed and an ambulance must be called.

-Cardiopulmonary resuscitation must be conducted in case of cardiopulmonary arrest.

Article 29. Preparation of first-aid dressings

First-aid dressings must be prepared in each workshop, substations, and maintenance offices whose work may involve dangerous and noxious places.

In addition, it is recommended to provide any workers at outdoor working places such as transmission lines with portable first-aid dressings.

Sample of first-aid dressings is shown as follows;

-Automated External Defibrillator

-Disinfectant

-Gauze

-Bandage

-Triangular bandage

-Adhesive tape

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