Heat Stress Survey Flashcards
Define Heat Stress
combination of thermal radiation, air temp and flow, humidity, and work load that affect the body’s abilities to regulate temperature
what are the environmental factors causing heat stress
Thermal Radiation
Ventilation
Humidity
Air/sea water temp
Define acclimatization
the act of becoming a custom to temp or new environment
Acclimatization happens how
gradually within 3+ weeks
How does past exposure heat injuries affect an individual
decreases the ability to handle heat stress conditions
what are the med history factors that affect heat personal stress
past exposure
heath conditions
G6PD
Sickle cell
medications
drugs / alcohol
exercise and fluid intake
lack of sleep
excessive heat stress can cause
heat injury or death
what are the areas aboard ships where heat stress injuries are most common
flight deck
incinerator room
Laundries
Machinery spaces
Sculleries
what are the causes and contributors to heat stress condition
arduous operations
ventilation deficiencies
Steam and water leaks
Boiler air casing leaks
missing/deteriorated thermal insulation
weather conditions
a physiological heat exposure limit (PHEL) chart is as set of how many curves
6
the physiological heat exposure limit (PHEL) curve and work rate are est. by who
industrial hygienist / NAVSEA
what are the assignment categories of physiological heat exposure limit (PHEL) curves
Routine operations
Non- routine operations
Evacuation control center exercise
heavy work load
physiological heat exposure limit (PHEL) curve, routine operations is considered as
light work
what is done when physiological heat exposure limit (PHEL) curve, non routine operations is assigned
use next higher PHEL when determining stay time
physiological heat exposure limit (PHEL) curve, non routine is assigned when
increase in normal watch rate and minor equipment casualty
physiological heat exposure limit (PHEL) curve, ECC is assigned when
conducting evacuation control center drills
what physiological heat exposure limit (PHEL) curve, is assigned when conducting a heavy work load
PHEL VI
Define stay time
maximum allowable time personnel may work in heat stress condition at a given time
Define recovery time
minimum of twice the stay time as determined by the PHEL chart or 4 hours whichever is shorter
who must provide heat stress training for newly reporting personnel during indoc
Medical Department representative
what film must the Medical Department representative play
play it cool: heat stress prevention afloat
what are the 5 topics that the Medical Department representative must include in training
causes of heat stress
Hazards
Sx of exposure
heat stress first aid
heat stress monitoring
Heat stress monitors must receive training within how many weeks after appointment
12
what training must a heat stress surveyors complete
Heat stress surveyor watch station 318
NAVEDTRA 43704
what are the requirements for reporting heat stress injuries
Report using A&I report
report to naval safety center using web enabled safety system (WESS)
heat related injuries report to naval disease reporting system
if NDRS is not available how is injury reported
using a medical event report format
all heat stress monitoring will be reviewed by who and for what
SMDR
inaccuracies and QA checks
who will make notation of any existing problems and corrective actions implemented IRT Heat stress
Supervisor
engineering officer of the watch
what must be done Prior to Engineering Casualty or Damage Control Training Team (ECCTT/DCTT) drills,
the Drill Supervisor must be informed of the current STAY TIMES.
who are heat surveys routed to
XO/CO for comments and actions
what time are Routine reports where no administrative controls are required submitted at
8 o’ clock reports (2000 time frame)
how long must the SMDR maintain heat stress survey reports
1 year
what are required monitoring conditions for PHEL I though III
4 hrs or less of watch
and DB is equal or greater than 100
or
4hrs or more of watch
DB equal or greater than 90
what are required monitoring conditions for PHEL IV through VI
DB is equal or greater than 85
What are other events that require monitoring
Any space where a heat casualty occurs
During a drill set that exceeds 3 hrs in duration
When directed by CO
What are the two types of evaluation equipment individual elements
Dry bulb thermometer
Heat stress meter
What are the two types of heat stress meters
RSS-220 WBGT Meter
QUESTemp 48N Heat Stress Monitor
What is the function of the dry bulb thermometer
Measure ambient air temperature at work sites
Serves as an indicator for further heat stress monitoring by use of WBGT meter
Describe placement of hanging dry bulb
Permanently mounted where heat stress may exist
Temporarily mount at Temporary work sites
Properly shielded from influencing factors (heat/cold)
What accuracy is desired compared to wbgt meter for hanging db?
Within 5⁰
If not within 5⁰ from wbgt meter the dB should be
Re-positioned
DB temperatures should be read how often
Every 4 hrs in spaces that dB does not exceed 85⁰ F
Hourly if
- heat casualties
- dB exceeds 85⁰ F
What report can be generated and maintained on file by computer storage for inspection by ISIC or higher
SAMS generated report
Two types of temperature recording
Routine
High temperature
What does dB routine recording consist of
Record on appropriate log sheet
Reviewed by supervisor once each watch or shift
What does db high temperature recording consist of
Circle in red 100⁰ F or higher db temps
Notify supervisor immediately
Monitor all workstations in that space with wbgt meter
Db temperatures shall be recorded on what
Heat stress monitoring sheet during wbgt monitoring
What do heat stress meters measure independently
Db (ambient)
Wb (humidity)
Globe (radiant)
What is the wbgt index
A measurement of environmental conditions that consist of db, wb and gt
Wbgt index equation
(0.1xDB)+(0.7xWB)+(0.2xGT)
Combustion gases which may accumulate in a space due to inadequate ventilation or machinery malfunction is called
Fuel combustion gases (stack gas)
What happens when exposed to Fuel combustion gases (stack gas)
Not signs and symptoms…
Physiological effects intensified with heat stress
Vasodilation of peripheral vessels results in further impairment of cardiovascular system
What are signs and symptoms of fuel combustion gases (stack gas)
Watery eyes
Dyspnea
Tingling or numbness of the tip of the tongue, nose, fingers and toes
Mild sensation of alcohol intoxication
Actions taken for fuel combustion gases (stack gas) exposure
Reduce exposure limits if two other more symptoms detected
Determine new PHEL using table b2-a-5 or divide current phel time by 3.
Calibration checks for rss-220 acceptable range
100.0 + or -0.2 degrees F
Survey procedures for rss-220
Place at watch stander’s normal working position
Ensure ventilation is arranged normally
Db/wb should face air flow
Hold meter at chest level, 1 ft away from body
Wait times for rss-220
Initial 5 mins and 3 mins for subsequent readings
QUESTemp 48N monitor procedures
Turn on, ensure voltage over 6.4 or replace power source
Select view in main menu
Press I/O enter key for measurement screen
Press run/stop key to begin
Use arrow keys to set display to desired items
Hold at chest level, 18” away from body
Wait times for QUESTemp 48N
10 min initial
If moved to another site, 5 mins
Automated heat stress system must be mounted where
Most accurate position of where workers spend the majority of their time
How many portable meters are required with AHSS fitted ships
2
What information shall be documented after wbgt recording
Specific mounting location
Hanging db temp
Wbgt readings (db, wb, gt and wbgt index)
Determined exposure limits
Next wbgt monitoring time
Availability of potable water
Manual wbgt calculation
Any noted discrepancies (missing lagging)
