The aim of the informative material is to inform the people living in the surrounding of Inčukalns underground gas storage of the joint-stock company „Conexus Baltic Grid” (hereinafter – IUGS) and companies located in the vicinity about the potential threats and the required action in case of incidents in IUGS objects and about the anticipated protection measures.
The safety activities implemented by IUGS are focused on prevention of an industrial accidents and are organized to comply with the requirements stated in the normative acts of the Republic of Latvia. IUGS certifies that it applies the normative acts on the industrial accident risk assessment procedure and risk reduction measures. In accordance with Cabinet Regulations No. 131 Industrial Accident Risk Assessment Procedures and Risk Reduction Measures as of 01.03.2016, we have elaborated Object’s Safety Report that is submitted to State Environmental Bureau, a Civil Protection Plan that is submitted for revision at State Fire and Rescue Service and an application about the dangerous chemical substances is submitted to the State Environmental Service.
During the operation, IUGS follows internationally recognize quality, environment, health and safety system standards and are certified in accordance with the requirements of standards ISO 14001:2004 and OHSAS 18001:2007.
INFORMATION ABOUT THE OBJECT
JSC „Conexus Baltic Grid” is a unified natural gas transmission and storage operator in Latvia. The company was established in December 2016 when approaching the liberalization of Latvian gas market on 03.04.2017 in accordance with the European Union (EU) Gas Directive and regulated market principles defines by the Cabinet, JSC „Latvijas Gāze” was reorganized in two individual structural units. JSC „Conexus Baltic Grid” received the natural gas infrastructure: operator of unified natural gas transmission system and storage operator – Inčukalns underground gas storage.
JSC „Conexus Baltic Grid” Inčukalns underground gas storage, Ragana, Krimulda Parish, Krimulda Municipality, LV-2144
Person in charge of maintenance of IUGS existing safety system, planning and implementing of civil protection measures, management and coordination of action in case of industrial accidents – Ivars ŠČERBICKIS, manager of IUGS.
Joint-stock company „Conexus Baltic Grid”
Phone: 67087900, 67087999
Inčukalns underground gas storage:
Phone: 67048000, mob. 27880227 (secretary)
67048017, mob. 29440121 (operators’ station)
POSSIBILITIES TO OBTAIN ADDITIONAL INFORMATION
OUTLINE OF OBJECT’S AND EQUIPMENT OPERATION
IUGS is an important strategic object in the whole Baltic Sea region that provides the energy security and independence of the whole region. The active natural gas capacity of IUGS can reach up to 2.3 million cubic meters, which can fully supply the fuel raw material needs of Latvia and the region.
IUGS principal activity’s processes are:
The existing IUGS technological processes management, surveillance and safety system is automated that reduces the possibilities of industrial accidents and allows react operatively to the happened accidents.
For suction of natural gas IUGS uses two compressor stations (KS1 and KS2) that ensure gradual compression of natural gas to the pressure of 105 bars. Natural gas, through pipes is transmitted to the exploitation bores and pumped in the porous sandstone that is covered with gas-tight rock layers. In IUGS there are 93 exploitation bores, 47 observation bores and 23 control bores.
Gas storage depth is 700-800 m that allows safe and cost-effective storage of natural gas. The area of the underground geological structure formations is ~ 25 km2 in the territories of Sēja, Krimulda and partially in Inčukalns Municipalities. Gas bubble monitoring is performed during the gas storage period.
When performing the removal of natural gas, specific gas storage bores are opened and natural gas with the storage pressure is transmitted to the gas collection points where it is purified and dried. After the accounting of the natural gas it is transmitted to the natural gas transmission system owned by the company. The total length of the transmission system gas lines in the territory of Latvia is 1191 km and they connect the Latvian natural gas market with Lithuania, Estonia, North-West region of Russia.
INFORMATION ON DANGEROUS SUBSTANCES THAT CAN CAUSE AN INDUSTRIAL ACCIDENT
Dangerous chemical substances that can cause a chemical accident:
Chemical mixture that is lighter than the air. Main ingredient – methane 98% and other gases and compounds. The natural gas has no odour that’s why the transmission system operator performs its odorization by adding the ethyl mercaptan so that people could feel it.
When mixed with air, natural gas can form an explosive mixture. Natural gas is one of the gases causing the greenhouse effect.
Symptoms and effects of exposure: If concentrated gas jet gets on the skin or in the eyes, it may cause frost-bites. Natural gas is not toxic if inhaled. In big concentrations may cause asphyxiating effect.
Methanol, CAS No. 67-56-1
Characteristic hazards: category 2 flammable and category 3 toxic liquid
IUGS uses to ensure ancillary products trouble-free technological process. Flammable. Vapour is heavier than the air, they spread close to the ground and create explosive mixtures in connection with the air. May cause flammable or explosive mixture of vapour and air.
Symptoms and effects of exposure:
Conjunctive redness in the eyes conjunctive oedema (chemosis), conjunctivitis (red eyes) possible after contact with eyes. Local redness appears after contact with skin. If swallowed: nausea, dizziness, vomiting, narcotic effect. Huge doses may cause coma and death, headache and dizziness may be followed by fainting or unconsciousness, risk of blindness. If inhaled: cough.
INFORMATION ABOUT INDUSTRIAL ACCIDENT HAZARD, THEIR DEVELOPMENT SCENARIOS AND RISK FACTORS
IUGS has performed an industrial risk assessment where risk factors with extra-object effect are analysed that can cause accidents in each of the technological objects. The potential industrial accident risk factors are:
Risk assessment doesn’t discuss the accidents development scenarios related with the underground gas storage because the geological studies show that the layers covering the storage are tight and there is no gas flow in vertical direction.
Industrial accidents in IUGS territory may be related with a leakage of dangerous chemical substances and mixtures (natural gas and methanol) and consequences of this leakage.
Natural gas is lighter than air so in case of leakage, if there are no sources of ignition, it rises quite quickly and gets mixed with other masses of clean air. However, due to the high pressure of natural gas there’s a possibility that mechanical sparks are created in the gas communications and technological equipment that can ignite the leaking gas. Considering the properties of natural gas, the following accidents with spread of effect are possible:
During a sudden natural gas fire and/or explosion, heat radiation, combustion products, smoke and toxic vapour spread in the vicinity of fire source is possible. In case of gas cloud explosion an overpressure wave is spread that can demolish buildings and threaten humans’ lives and the surrounding environment. The impact distance caused by the explosion and the caused consequences depend on the amount of product that is involved in the explosion. People may suffer from flying subjects caused by the explosion wave that has cause death or sever personal injuries.
Attention! Huge heat radiation may form in the area of 600 m in case of gas line explosion with subsequent burning of gas, so promptly leave this area.
Since methanol is a liquid chemical substance, a puddle of product forms if it leaks that depending on the place of leakage may leak in limited amount (in ferroconcrete wave). If methanol does not ignite, it evaporates by causing air pollution. However, the made calculations show that in typical external environment conditions the dangerous steam concentrations are anticipated only in the direct vicinity of the place of spillage.
In case methanol ignites, the accident develops as a puddle fire with the spread of heat radiation effect cause by it.
The possible industrial accidents development scenarios of IUGS are assessed in cooperation with the consultants of SIA „Risks un audits” and they are summarized in IUGS Safety Report. The most important conclusions and data of the assessed industrial accidents risks are included in IUGS Civil Protection Plan.
INFORMATION ABOUT WARNING AND INFORMING ABOUT AN INDUSTRIAL ACCIDENT AND HOW RESIDENTS WHO MAY GET INFLUENCED IN SUCH ACCIDENT SHOULD ACT AND BEHAVE
IUGS confirms that it has installed an alarm and notification system and a procedure (notification scheme) is established how the cooperation with State Fire and Rescue Service and other operative services is arranged, how responding and consequences elimination measures are performed in case of unwanted events or in case of an industrial accident. In case of an accident all the required state authorities, municipalities and IUGS persons are notified in correspondence with the operative notification scheme.
The 3 alarm sirens installed in IUGS objects will be activated to warn the residents in case of an industrial accident in the result of which people may be threatened with the effect of dangerous substances or heat radiation; these sirens are located so that the audible signal is heard in the radius of ca. 1.5 km.
Besides, in case of an accident it is planned to inform the local municipalities and the neighbouring companies by phone.
We ask the people to call the following phones as soon as possible if the alarm sirens are heard to receive information about the cause of activation:
phones of municipalities:
Information! Currently IUGS works at the engineering solutions that can ensure early notification of people about the threat of an industrial accident and the required action.
ACTION AFTER WARNING ABOUT AN ACCIDENT IS RECEIVED
If a continuous alarm signal is heard – additional information about the industrial accident and the protection measures to be taken may be received by calling to IUGS phones 67048017, 67048019, mob. 29440121
Action when indoors – after a warning about an accident is received, close and seal the windows, doors, ventilation hatches, chimneys and switch off the air conditioners.
Action when outdoors- after a warning about an accident is received, leave promptly the dangerous area perpendicularly to the wind direction (so that wind blows from the side). If it is impossible, look for the shelter in the closest building.
Listen to the information given by State Fire and Rescue Service, State Police and staff of IUGS through the loudspeakers and comply with the instructions.
Don’t use open flame and not perform activities that cause sparks or flame. If possible, make sure other people are aware of the accident and they know how to act.
Evacuation – the residents receive information about the necessity for evacuation and its procedure from mass media or from the rescue services or police. In case of evacuation take with you ID documents, money, medications and basic goods. Before evacuation, cut off the power supply, gas and water supply.
In case of aggravation of the health condition (headache, weakness, balance disorders and vomiting), go to the closes medical institution or, if there are any victims nearby, call emergency medical aid by phone 113.
DON’T PANIC AND KEEP CALM!
IN CASE OF AN ACCIDENT OBSERVE THE INSTRUCTIONS AND REQUIREMENTS OF OPERATIVE SERVICES!
WHERE ELSE TO CALL IN EMERGENCY SITUATIONS?
IUGS has the required equipment to take measures in case of an industrial accident and to implement preventive measures to reduce, limit or eliminate the potential emergency consequences. IUGS continues working at the improvement of risk situations surveillance, analysis and safety system.
This informative material is reconciled in the State Fire and Rescue Service and is available at the website of State Environmental Service.
Inčukalns underground gas storage of the joint-stock company „Conexus Baltic Grid”, 2017
Viktors Kislovs 67048007