Heat Stress Flashcards by Nicholas Armes

Define Heat Stress

Any combination of air temperature, thermal radiation, humidity, airflow, and work load which stress the body as it attempts to regulate temperature.

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Environmental factors that cause Heat Stress

Thermal radiation
Ventilation
Humidity
Air/ sea water temp

THAV

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Factors that contribute to Heat stress

Alcohol
Tobacco
Poor Sleep
Dehydration
Diet
Drugs
Past heat cases
G6pd / Sickle cell

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Common spaces heat stress occurs in

Laundry room
Engineering rooms
Sculleries/ galley
Flight deck
Incineration room

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How many PHEL levels are there?

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Examples of Heavy work

Changing large valves
Assembling/ disassembling heavy machinery
PHEL VI

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What is a stack gas?

Gasses that can accumulate in a workspace due to poor or lack of ventilation

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Signs and sxs of gas exposure

Watery eyes
Numbness and tingling in peripherals
AOC
Dyspnea

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Heat stress training is provided by who? How Often? and what?

SMDR, Annually, “Play it cool” video

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How do you report to the Naval Safety Center?

(WESS) Web enabled safety system

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Sources of Humidity

Condensation
Steam Leaks
Bilge Water

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Sources of Air/ Sea water

Refrigerator leaks
Engines
Generators
Evaporators

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Personal Factors that might affect acclimization

Past heat injuries
G6PD / Sickle cell
Medication
Alcohol
Sleep
Drugs
Exercise and fluid intake

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What does PHEL stand for

Physiological Heat Exposure Limit

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Who establishes PHEL?

IH & NAVSEA

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Reasons to conduct a heat survey

Casualty
Heavy work
Drills
Temps @ 100 when working less than 4 hours
Temps @ 90 when working more than 4 hours
CO Requested

Subcatagories of PHEL that effect work time

Routine
Non Routine (add 1)
ECC exercises (use second category on table)
Heavy work (IV)

How do you get a recovery time?

Double the time worked for a max of 4 hours. If work time is less than 4, circle red on survey.

Manual heat stress training must contain what topics?

Hazards
Signs and sxs
First aid
Heat stress monitoring
Cause of heat stress

How long does the heat stress monitor have to be trained? What requirement?

12 weeks
318 Heat stress surveyor PQS, NAVEDTRA 43704

Who notifies of existing problems and corrective actions for surveys?

Engineer of the watch
Supervisor

Who needs to be notified of changes in work times?

How long does the SMDR keep heat survey records?

1 year

What is the equation for manual WBGT?

(0.1 x DB) + (0.7 x WB) + (0.2 x GT)

What are the approved WBGT devices?

RS 220 Quest temp 48N

What is the device called that is permanently installed in work environments?

AHSS

What are other conditions to conduct a heat survey?

Drills greater than 3 hours in length CO requested

How do you use the RS220?

Turn on wait 5 minutes to calibrate wait 3 minutes in between temps of the same area Hold at chest level and 1 foot away from body

How do you use the Questtemp 48N?

Turn on Ensure that the battery reads at least 6.4 volts Allow 10 minutes for calibration Allow 5 minutes between readings Hold at chest level 18 in away from body

What does the HB have to be in relation to the WBGT? What do you do if they don't read the same?

5 degrees, if not move the HB till it reads within limits.

What is the instruction for Heat Stress?

OPNAV 5100.19

What systems can you use to report heat stress injuries?

Accident & Injury Report WESS NDRS Medical event format email

How long will the MDR keep Heat stress records?

1 year

How often does the DB get documented?

every 4 hours if below 85, if over every hour, or if casualties

All Government Motor Vehicle (GMV) or Government Vehicle Other (GVO) mishaps resulting in:

) $5000 or more government vehicle, government property damage, private vehicle, or private property damage.

How does the safety officer get notified of Injuries?

Injury Report

If stack gases are suspected in a work space, what do we do?

Reduce exposure limits if sxs detected. Assign new PHEL

Causes and contributors to heat stress conditions

(1) Steam and Water Leaks (2) Boiler Air Casing Leaks (3) Missing/Deteriorated Thermal Insulation (4) Ventilation Deficiencies (5) Weather Conditions (6) Arduous Operation