NAVOSH 5-5-2 Heat Stress Monitoring Program Flashcards
Heat Stress Stuff
Who performs Heat Stress monitoring?
The IDC
Define Heat Stress
A combination of air temp, thermal radiation, humidity, airflow, and work load which stress the body as it attempts to regulate temp.
When can Heat injury/death occur?
When heat stress is excessive and exceeds and increases the body’s temperature.
What environmental factors cause Heat Stress?
Thermal Radiation
Ventilation
Humidity
Air/sea Water Temp
What is thermal radiation?
Sun
Heat source (incinerator, engines, generators, laundry dryers, etc.)
What is Ventilation air flow?
Forced air systems: Intakes outside air into workspaces (Spot cooling)
Forced Exhaust systems: Removes stagnant or excess contaminants in the air. (red Devil Blowers)
What is Humidity?
Moisture in the air
-Steam leaks
-Bilge water
-Condensation
What is Air/sea Water Temp?
Intake valves that allow sea water or outside air to be utilized for cooling shipboard equipment.
(Refrigeration Units, Engines, Generators, Evaporators)
What is acclimatization?
The act of becoming accustomed to temperature or new environment.
How long does it typically take to become acclimatized?
Usually 3 weeks or more.
Do past exposures to heat injury affect the induviduals ability to adapt?
Yes
What health conditions affect Heat Stress?
G6PD
Sickle Cell Trait
What are personal factors associated with Heat Stress?
Past exposure
Change in health status
Exercise and fluid intake
Medication
Alcohol Intake
Lack of Sleep
Drugs
Where does Heat Stress typically occur on the ship?
Machinery Spaces
Laundries
Sculleries/Galleys
Incinerator Room
Flight Decks
What are causes and contributors to Heat Stress?
-Steam and Water Leaks
-Boiler Air Casing Leaks
-Missing/Deteriorated Thermal Insulation
-Ventilation Deficiencies
-Weather Conditions
-Arduous Operations
What does PHEL stand for?
Physiological Heat Exposure Limits
How many curves does PHEL have?
6 Curves.
What do the curves indicate?
They compare the WBGT index and degree of work rate to determine max exposure time to the heat.
Who established the PHEL curves and work rates?
Industrial Hygienist and NAVSEA.
Who determines individual Heat Stress locations?
The Industrial Hygienist.
What are some examples of Routine Operations?
Light work
-Sweeping down
-Painting
-Cleaning lube oil strainers
What are some examples of Non-routine Operations?
Ventilation being secured.
What do you need to do for Non-routine operations?
- Use the next higher PHEL
- Increase normal watch stander work rate and minor equipment casualty.
What does ECC stand for?
Evacuation Control Center drills
What are some examples of Heavy work loads?
-Replacing large valves.
-Cleaning lube oil sumps
-Disassembly and reassembly of large or heavy equipment.
What does Stay Time mean?
The maximum allowable time personnel may work in Heat Stress conditions.
What is recovery time?
Minimum of twice the Stay time OR 4 hours (whichever is shorter)
What are Fuel Combustion Gasses (Stack Gas)?
May accumulate in a space due to inadequate ventilation or machinery malfunction.
What are the Symptoms of Stack Gas?
-Causes vasodilation of peripheral blood vessels.
-Watery eyes
-Dyspnea
-Paresthesia
-Mild sensation of alcohol intoxication
What do you do if the sailor has 2 or more symptoms of stack gasses?
Reduce exposure limits by determining new PHEL OR divide current PHEL stay time by 3.
When does the MDR provide Heat Stress training?
Initially during Indoc and annually.
What film is played during Heat Stress training?
“Play it Cool: Heat Stress Prevention Afloat”. for all Hands.
What must heat stress training include at a minimum?
-Hazards
-Symptoms of Exposure
-Heat Stress First-Aid
-Heat Stress Monitoring
-Causes of Heat Stress
How soon do Heat Stress Monitors need to recieve the training?
12 weeks upon assignment.
What additional training requirements do you need for Heat Stress training?
-Complete Heat Stress Survey
-Complete watch station 318 of the Safety Programs Afloat PQS (NAVEDTRA 43704)
What are the 3 ways to report Heat Stress injuries?
-Naval Safety Center using Web Enabled Safety System (WESS)
-Naval Disease Reporting System (NDRS)
-Medical Event Report format in no access to NDRS
What must the Heat Stress surveyor ensure?
WB<DB; GT ≥ DB; and WB<WBGT<GT
Who reviews Heat Stress surveys and who do they get routed to?
-Reviewed by SMDR
-Routed to XO/CO.
Routine reports with no administrative action need to be reported by when?
Submit at 8 o’clock reports (2000 time frame)
Who maintiains the reports and for how long?
SMDR maintains them for 1 year.
Who assigns and qualifies supervisors to review DB temperatures?
Engineer Officer
Where do you place Hanging Dry Bulbs?
-Permanently mounted at watch and work stations where heat stress exist.
-Temporarily mounted at temp work sites.
- Must be properly shielded from radiant heat
How accurate does the Hanging Dry Bulb need to be?
Within 5 degrees of the WBGT.
If not must be repositioned.
How often do you read the DB temperature?
Every 4 hours if <85℉
Hourly if:
-Heat Casualties
-DB temp >85℉
How do you record the DB temperature?
Reviewed by the supervisor once each watch or shift
-Circle in red temps >100℉, and notify supervisor immediately.
What is the WBG Index?
A measurement of environmental conditions. Is a weighted average of DB, WB, GT.
-Helps determine PHEL
What are the 2 types of WBGT?
RSS-220-WBGT Meter
QUESTemp 48N Heat Stress Monitor
If the watch/workstation length is <4hrs and DB is ≥100℉…
PHEL I-III
If the watch/workstation length is >4hrs and DB is ≥90℉…
PHEL I-III
If the DB is ≥85℉…
PHEL IV-VI
WHen are you required to do a Heat Survey?
-Heat casualty
-During a drill ≥3hrs in duration
-CO’s discretion
When do you do follow on surveys?
If the DB temp increases by more than 5℉ from HDB in previous survey.
What is the acceptable range for calibration checks?
100.0℉ + or -0.2℉
What are the survey procedures for the RSS-220?
-Wait 5min initially and 3min for subsequent readings.
- Ensure ventilation is normal and DB/WB face air flow
-Hold at chest level 1’ away from body.
What are the survey procedures for the Questemp 48N?
Wait 10 min initially and when switching workspaces, 5 min subsequent.
-Hold at chest level 18” away from body.
Why must ships with Automated Heat Stress Systems (AHSS) have at least 2 portable WBGT?
In case one breaks or malfunctions.
Who do you route the Survey to?
Immediately notify Supervisor (DH) who will notify the CO.
What 3 things does the Supervisor (DH) notify the CO with?
-Condition
-PPE
-Action to reduce heat
(Will all be noted on the Heat Stress Monitoring Sheet)
