5-5-2 Heat Stress Monitoring Program Flashcards
What is Heat Stress?
- Combo of Air Temp, Thermal Radiation, humidity, airflow and work load which stress the body as it attempts to regulate temp.
- Can cause heat injury or DEATH
Environment Factors Causing Heat Stress
Thermal Radiation
- The Sun and heat sources aboard ship
Ventilation - Airflow
- Forced Air Systems - Intake of outside air
(a) Spot-Cooling
- Forced Exhaust - Removes fumes
(a) Red Devil Blowwers
Humidity
- Steam Leaks
- Bilge Water
- Condensation
Define Acclimatization
The fact of being accustomed to temperature or new environment.
- Usually within 3 weeks or more
Personal Factors Associated with Heat Stress
- Past heat injuries will affect adaptability
- Current health status or meds may alter physiological body changes; G6PD or Sickle Cell
- Exercise and fluid intake, meds, alcohol, sleep
Common Locations of Heat Stress Conditions
- Machine Spaces
- Laundry Rooms
- Sculleries (PHEL V)/ Galley
- Incinerator Room (Trash Room)
- Flight Decks
Causes of Heat Stress Conditions
- Steam and Water Leaks
- Boiler Casing Leaks
- Missing/Deteriorated Thermal Insulation
- Ventilation Deficiencies
- Weather
PHEL Chart
Physiological Heat Exposure Limit
- Set of SIX curves that compare the WGBT index and degree of effort or work rate to determine the max permissible exposure to heat stress
- Work rates established by IH and NAVSEA
- IH determines Heat Stress Conditions locations, OPNAVINST 5100.19 for reference
Routine/Non-Routine Operations
Routine Ops
- Light work , ie sweeping, painting, etc.
Non-Routine Ops
- Use higher PHEL when determine stay time. For example, ventilation being secured
Describe ECC Exercises/Heavy Work Load
- Evacuation Control Center Drills
- Heavy Work Load
Replacing large valves
Stay Time/Recovery Time
Stay Time
- Maximum allowable personnel may work in heat stress conditions
Recovery Time
- Twice of stay time or 4 hours, whichever is shorter
Describe Fuel Combination Gases (Stack Gases) and List Signs and Symptoms of exposure
Gases that may accumulate in a space due to inadequate ventilation or machine malfunction
Signs and Symptoms
- Watery Eyes
- Dyspnea
- Numbness or Tingling of the tip of tongue, nose or finger/toe tips
- Mild sensation of alcohol intoxication
Heat Stress Training Requirements
- MDR will provide training for all NEWLY reporting personnel, annually after
Training Must Include
- Hazards
- Symptoms oof exposure
- Heat stress first aid, monitoring and causes
Heat Stress Monitors receive training within 12 weeks upon assignment
Requirement for Reporting Heat Stress
- Report using an A&I Report
- Report to Naval Safety Center through WESS
- All heat stress injuries reported to Naval Disease Reporting System (NDRS)
Heat Stress Survey
- All monitoring reports reviewed by SMDR and SMDR will make recommendations on crew health status
- Routine reports where no administrative controls are required , submit at 8 o’clock reports
- ALL REPORTS MAINTAINED BY SMDR FOR 1 YEAR
Dry Bulb Thermometer
Function:
- Measures ambient air temp at work sites where heat stress exists
Placement:
- Permanently mounted at watch and work stations
- Must be properly shielded from radiant heat levels
Accuracy:
- Must be within 5 degrees Fahrenheit of the WGBT meter
Reading of DB Temps:
- Every 4 hours if spaces do not exceed 85 F
- Read hourly IF:
(a) Heat Cas
(b) DB temp over 85 F
High Temps
- Circle in RED for 100 F or higher DB temps
Heat Stress Meter Measures what?
Dry Bulb (Ambient)
Wet Build (Humidity)
Globe (Radiant)
WGBT Index
- Measures Heat Stress, weighted average of DB, WB, Wet Bulb and Globe temps
Equation
- (0.1 x DB)+(0.7 x WB)+(0.2+GT)
Different PHELs Required Monitoring Conditions
PHEL 1-3
- 4 hours or less, DB equal to or greater than 100 F
PHEL 1-3
- Greater than 4 hours, DB equal to or greater than 90 F
PHEL 4-6
- DB is equal to or greater than 85 F
During a drill set that exceeds 3 hours
WBGT
Wet Bulb Globe Temp
RSS-220 WGBT Meter
- Acceptable range is + or - 0.2 degrees F, if meter is operating properly
- Hold 1 foot from bosy
QUESTemp 48N Heat Stress Monitor
- If voltage is less than 6.4 replace or recharge batteries
- First measurement done in 10 minutes to equilibrate to surrounding area.
- If meter is moved, wait 5 mins for stabilization
- Hold 18 inches from body, chest level
AHSS
Automated Heat Stress System
- Mounted for most accurate temp of the area
- Calibration not required
Recording Readings WBGT
ALL WGBT readings recorded and following is documented
- Hanging DB Temp
- WBGT readings to include DB, WB, GT and WGBT index
- Availability of water
- Circle in red all exposure limits less than the watch period
Routing of Heat Stress Survey
Immediately Notify Supervisor
Supervisors (DH) notify the CO with
- Condition
- Personal Protective Measures
- Action to reduce heat
(a) All noted on Heat Stress Monitoring Sheet
