Confined Spaces Flashcards
How long are the Confined Space Risk Assessment Records kept for?
The MEO/EO/STO is responsible for retaining records of any Confined Space Risk Assessments that are conducted within the unit. Records of Confined Space Risk Assessments must be kept for at least 28 days after the work to which it relates is completed. If a notifiable incident has occurred during the activity, the Risk Assessment must be retained for two years.
How long before entry can a AC870 be completed
Hazards and risks within confined spaces can change quickly; as such, the Confined Space Entry Permit must be issued no more than one hour prior to the confined space entry. Should this time frame be exceeded, confined space mandatory controls, risks and hazards must be reassessed.
How long can a AC870 last for?
Confined Space Entry Permit will last for a total of 10 hours. Once 10 hours have elapsed, the Confined Space Entry Permit may be reissued for a further 10 hours. The maximum life of the Confined Space Entry Permit (including after reissue) is 20 hours.
How long must the Confined Space Entry Permit be kept for?
The MEO/EO/STO is responsible for retaining records of any Confined Space Entry Permits. Records of Confined Space Entry Permits can be disposed of on completion of the activity. If a notifiable incident has occurred during the activity, the Permit must be kept for at least two years after the work to which it relates is completed.
All confirmed and approved Confined Space Entry Permits must be registered in the Confined Space Entry Permit Register.
If a fan is being used to ventilate a confined space, how far should it be from the confined space
If a portable fan is used for force ventilation, the fan must be seven metres from the opening and the discharge hose lowered to near the bottom of the confined compartment.
What are some examples of confined spaces
a. fuel tanks (diesoline, gasoline, kerosene, AVCAT) or any other liquid or gaseous fuel;
b. water tanks (feed, fresh, ballast), void spaces, cofferdams, double bottom/wing compartments, sewage treatment tanks (CHT systems);
c. oil tanks (sludge oil, lubricating, hydraulic);
d. cable lockers (anchor cable stowage);
e. open-topped spaces such as pits or degreasers, pipes, sewers, shafts, trunking ducts and similar structures; and
f. gas turbine rotor casing, piston engine enclosed crankcase, main circulating water inlet and discharge pipes, pressure vessels
What are the responsibilities of a confined space sentry
- Understand nature of hazards
- Remain outside and perform no other task which may interfere with their primary role
- Have all the required rescue equipment read. Understand nature of hazards
- Remain outside and perform no other task which may interfere with their primary role
- Have all the required rescue equipment ready
- Have the authority to order CS Workers to exit
- Never attempt a rescue
- Identify all entry exit spaces and print names and times on the AC870
What are the Safe levels of atmospheric contaminants
Oxygen: 19.5 - 23.5 %
Flammable contaminants: lower 5%LEL
Carbon monoxide: Below 25 ppm
Hydrogen Sulphide: Below 10 ppm
Volatile Organic Compounds: Below 10ppm
What fields are on a AC869
- Details
- Reason
- Hazards
- Mitagation
- Rescue Plan
- Authorisations
What fields are on a AC870
- Details
- Precautions
- PPE
- Initial Gas Reading
- Entry Permit Authorisation
- People entering confined space
- Sentry details
- Repeat Authorisation
- Completion of work
What form is required to update qualifications on PMKEYS
AC399
Record of course outcome, proficiency or test results
What information is included in the Confined Space Register
Name of Compartment, openings, when last sealed, likely hazards, generic mitigations
What is a AC870
Confined Space Entry Permit
What is a confined space
- A space not designed or intended to be occupied by a person
- Is designed to be a normal atmospheric pressure
- Is likely to cause a risk to health and safety from
a. An atmosphere that does not have a safe oxygen level
b. Contaminants including airborne gases, vapours and dusts that may cause injury from fire or explosion
c. Harmful concentrations of any airborne contaminants
d. Engulfment
What is the Confined Space Risk Assessment Form
AC869
What is the CSEPAA?
Confined Space Entry Permit Approval Authority
What safety equipmemt should be placed in the confined space?
An OCCABA, lifeline of suitable length and an ELSRD for each person working in the confined space, and other appropriate emergency rescue equipment are to be provided near the entrance to the compartment.
What’s some examples of Confined Spaces
Tanks, trunks, MASTIS
What’s the reference for Confined Space
ANP4202 Chap 2
When can a Confined Space Entry Permit be issued?
A confined space entry permit can only be issued no more than one hour prior to the confined space entry
When does a confined entry become void?
A Confined Space Entry Permit becomes void if any of the following occurs:
a. after 10 hours have elapsed from time of issue, unless reissue authorised then after 20 hours from time of issue (noting only one reissue is allowed);
b. when gas detection equipment (or other device) indicates that oxygen or atmosphere levels are unsafe; in this circumstance, don Emergency Life Supporting Respiratory Device (ELSRD) or Open Circuit Compressed Air Breathing Apparatus (OCCABA) and vacate the compartment/area and raise the alarm;
c. a new hazard or risk is introduced to the confined space (such as the introduction of additional or new chemicals not listed on the Confined Spaces Entry Permit, or the change of the use of equipment) which alters the risk assessment;
d. if the CSEPAA listed on the Confined Space Entry Permit, or CS Supervisor, changes;
e. if there is a change to the nature of the work that is being performed within the confined space; and
f. if there is a significant change in the confined space atmosphere.
When should OCCACAs be used in confined spaces?
Navy requires OCCABAs to be used when confined spaces are entered in any of the following circumstances:
1. after the authorisation of a risk assessment for the confined space to conduct initial testing or monitoring;
2. following the issue of a Confined Space Entry Permit (Form AC870) where breathing equipment is required by the Confined Space Risk Assessment (Form AC869); and
3. to rescue someone from a confined space.
Where should the AC870 be placed after completion?
Confined Space Entry Permit (Form AC870) has been issued no more than one hour prior to entry and is displayed at a prominent place near the confined space.
Which positions needs to listed on the authorisation matrix WRT confined spaces
Confined Space Entry Permit Approval Authority
Confined Space Supervisor
Confined Space Rescue Team Member
Confined Space Sentry
Confined Space Worker
Who completes the confined space risk assessment
The confined space supervisor
Who is responsive for creating a comprehensive list of confined spaces in Class Standing Orders
CMR
Why should potentially hazardous plant and services should be isolated prior to any person entering the confined space?
Isolate to prevent the:
a. introduction of hazardous contaminants or conditions through piping, ducts, vents, and fire protection equipment;
b. activation or energising of machinery in confined space;
c. activation of plant or services outside the confined space that could adversely affect the space;
d. release of any stored or potential energy in plant; and
e. inadvertent use of electrical equipment.
Will temporary control measures such as providing ventilation declassify a confined space?
No
WRT confined spaces, what monitoring and communication must occur?
- all confined space work party members have been briefed by the CSEPAA on hazards, risks, controls, Standard Operating Procedures, testing and monitoring and communication requirements;
- main broadcast ‘pipes’ warning personnel of the hazards are to be made every 30 minutes as a minimum, or until the compartment has been declared safe; and
- all warning notices, signs and boundaries (including roping) have been erected and are clear and prominently located next to each entry to the confined space. A rope barrier establishing a danger area boundary seven metres, or as near as practicable to seven metres, from the opening is to be erected and warning notices marked ‘NO NAKED LIGHTS’ must be placed at a distance of seven metres from the openings and at the ends of vent pipes.
- During the conduct of confined space operations, the CS Sentry must maintain contact via communications with personnel in the confined space and controls all personnel entering and exiting the confined space using Section 6 of the Form AC870.
What happens on completion of confined space work
The MEO/WEEOs delegate inspects the space to ensure that work has been completed. The CS Supervisor then ensure all people are clear of the confined space and left the space in a safe condition. The CSEPPA who authorised the acceptance must record acceptance of work on the AC870.
What is some of the PPE required for working in a Confined Space
Hand and eye protection
Clothing protection including footwear
OCCABA
Hearing protection
Safety line and harness
Safety helmets
Spermicide suit
Who authorises the AC869
CSEPAA
What are some additional protective measures which can be to included on the AC869
- ceasing work in adjacent compartments
- roping off tank tops
- prevention of falling
- provision of adequate lighting
When does a confined space permit become void
- after 10 hours
- when gas detection equipment indicates that oxygen or atmosphere conditions are unsafe
- a new hazard or risk is introduced
- if the CSEPAA or supervisor changes
- if there is a change to the nature of work
- if there is a significant change in confined space atmosphere
What is the requirements of the Confined Space Sentry:
- continual communication with CS Workers
- monitoring of conditions within confined space, observing working being carried out
- remain outside and recognise signs and symptoms that a worker may experience
- have all required rescue equipment immediately available
- have authority over CS Workers
- never attempt to rescue
- verify all entry and exit points and print names and times of entry into AC870
What is the requirement of the CS Worker:
- understand the nature of conditions within confined space
- if
