HEAT 2 Flashcards
who Establish and enforce an effective heat stress policy that ensures personnel heat exposures are limited per this chapter except in an operational emergency.
a. Commanding Officer
who (1) Ensure heat stress injuries are reported per reference (a).
(2) Ensure the program is evaluated at least annually.
b. Safety Officer
who (1) Review all heat stress surveys to determine obvious inaccuracies, reduced PHEL stay times, and any personnel protective actions being taken. Submit heat stress surveys that result in reduced stay times to the commanding officer daily for review. Maintain originals of all heat stress surveys for 1 year.
(2) Provide training as required in paragraph 5.
(3) Report all cases of heat stress related injuries to the safety officer.
(4) Conduct heat-stress surveys of all spaces not under engineering as needed.
MDR
who (1) Ensure DB thermometers are installed and maintained (3) Assign and qualify supervisors to review DB temperatures or access AHSS readings and take the required action (5) If maintenance or repair is required, record all heat stress related deficiencies on the CSMP and TSIMS (CVNs only).
Engineer Officer or Reactor Officer
who (1) Obtain prompt medical attention for personnel who exhibit heat stress symptoms.
(2) Follow recommended work practices and procedures for controlling heat stress hazards. (3) Complete heat stress training upon reporting aboard.
h. All Hands
WBGT index formula.
WBGT = (0.1 x DB) + (0.7 x WB) + (0.2 x GT)
hanging dy bulb temperature reading range
0-150 degrees farenheit
Where are DB thermometers be placed
- must be permanently mounted at watch and workstations throughout the ship where heat stress conditions may exist.
- Placement of the DB thermometers may be in or out of the ventilation air stream but must be hung at least 2 feet from any supply ventilation terminal or opening.
- hung with a non-heat conducting material such as plastic tie-wrap or string (never hang with metal wire) and positioned to minimize the influence of any adjacent or local heat or cold sources (avoid direct contact between thermometer and hot or cold structural surfaces).
if the WBGT is greater than 5 degrees farenheit or more than the DB thermometer, which one is considered to not be an accurate reading
The dry bulb thermometer
Do you calibrate a DB thermometer?
No.
if found inaccurate, the hanging DB must be replaced or validated
If the dry bulb is found to be inaccurate, how do you validate it
by aligning the etch mark with the freezing point (32 degrees Fahrenheit).
At a minimum, where shall dry bulbs be placed
main machinery spaces, auxiliary machinery spaces, emergency diesel spaces and other engineering spaces containing heat sources, in laundries (not required for self-help laundries), sculleries, galleys, bake shops, and steam catapult spaces.
what about areas where repairs or maintenance are being performed in a heat stress area.
DB thermometer must be temporarily mounted
what about non-air conditioned spaces, not normally manned, in which personnel may have to periodically work or conduct maintenance, such as storerooms.
DB thermometer must be temporarily mounted
How is an AHSS unit installed in regards to ventilation ducts
AHSS unit should be located in relation to the ventilation duct such that airflow across the sensors does not exceed 600 feet per minute (fpm).
How is an AHSS unit installed in regards to orientation
AHSS unit is to be positioned vertically with the sensors at the top of the unit and with a minimum clearance of 4 inches above the sensors and a minimum clearance of 6 inches on the right side of the AHSS unit.
How do you calibrate an AHSS unit
Calibration is not required for the AHSS but the sensors must be validated quarterly by ships force as required by the equipment MRC.
1.
(a) Every 4 hours for manned spaces if DB temperatures do not exceed 85 degrees Fahrenheit.
(b) Every hour for manned spaces if DB temperatures exceed 85 degrees Fahrenheit.
(c) Every hour at temporary installations where the DB temperature exceeds 85 degrees Fahrenheit during repair or maintenance operations
Hanging DB temperatures must be recorded on a prepared paper log form or green log book and reviewed by the space supervisor. How long must logs be kept
1 year.
If a DB temperature reaches or exceeds 100 degrees Fahrenheit (watch or work length 4 hours or less), or 90 degrees Fahrenheit (watch or work length greater than four hours), or 85 degrees Fahrenheit (in the scullery) per subparagraph 3c(3)(a), the space supervisor must circle (in red) the DB reading and immediately notify the watch supervisor (e.g., engineering officer of the watch (EOOW), division officer). The watch supervisor must direct heat stress surveys to be conducted and enforce the resulting stay times.
3.
