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NAVOSH 5.5 - 5.8 > 5.5 Heat Stress Monitoring Program > Flashcards

5.5 Heat Stress Monitoring Program Flashcards

1
Q

What is the role of the IDC in the heat stress monitoring program?

A
  • Perform heat stress monitoring

* provide recommendations to the COC to prevent heat stress injuries

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2
Q

What is the definition of heat stress?

A

Any combo of air temp, thermal radiation, humidity, airflow, and work load which stresses the body as it attempts to regulate its temperature

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3
Q

When does heat stress become excessive?

A
  • When the body cannot compensate and body temperature increases.
  • Can cause heat injury or death
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4
Q

What are the Environmental Factors that cause heat stress?

A
  • Thermal Radiation
  • Ventilation - Airflow
  • Humidity - Moisture in the air
  • Air/sea water temperature
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5
Q

Examples of thermal Radiation?

A
  • Sun

* Heat source (Incinerator, engines, laundry/dryers)

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6
Q

Examples of Airflow?

A
  • Forced Air Systems ( Outside air into workspace - i.e. Spot-cooling)
  • Forced Exhaust Systems (Red Devil Blowers)
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7
Q

Examples of Humidity and Air Flow?

A
  • Steam Leaks
  • Bilge Water
  • Condensation
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8
Q

How is Humidity and Air Flow bad?

A

Can stress the body as it attempts to regulate body temperature

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9
Q

Examples of Air/Sea Water Temperature?

A

Intake valves allow sea water or air to cool shipboard equipment

  • Refrigeration Units
  • Engines
  • Generators
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10
Q

What is acclimatization?

A

Act of becoming accustomed to temperature or new environment.
*body becomes more efficient in coping with heat stress

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11
Q

How long does it take to acclimatize?

A

3 or more weeks

*Navy gives 21-30 days

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12
Q

What personal factors contribute to heat stress?

A
  • Past exposure (Heat stroke)
  • Current health status ( G6PD/Sickle Cell)
  • Exercise/hydration
  • Medication
  • Alcohol Intake
  • Lack of sleep
  • drugs
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13
Q

Common locations of Heat Stress Conditions?

A
  • Machinery Spaces
  • Laundries
  • Sculleries (PHEL V)/ Galleys
  • Incinerator Room
  • Flight Decks
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14
Q

Causes/Contributors to Heat Stress Conditions?

A
  • Steam/Water leaks
  • Boiler air casing leaks
  • Missing/Deteriorated Thermal Insulation
  • Ventilation Deficiencies (BIG ONE)
  • Weather Conditions
  • Arduous Operation
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15
Q

What is PHEL and how many curves?

A
  • Physiological Heat Exposure Limits

* 6

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16
Q

Who establishes PHEL curves?

A

IH and NAVSEA

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17
Q

Who determines individual Heat Stress Condition Locations?

A

IH

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18
Q

What are the assignments of PHEL Curves?

A
  • Routine Operation
  • Non-routine Operations
  • Evacuation Control Center Drills
  • Heavy Work load
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19
Q

Define routine operations for PHEL Curves

A

Light work ( Sweeping, painting)

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20
Q

Fact about non-routine operations for PHEL Curves

A
  • Use next higher PHEL to determine stay time

* Increase normal watch stander work rate

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21
Q

Examples of Heavy Work Load for PHEL Curves

A

Replacing large valves, cleaning lube oil dumps assembly, large/heavy equipment

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22
Q

What is Stay Time?

A

Max allowable work time

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23
Q

What is Recovery Time?

A

Rest from stay time

* Twice stay time or 4 hours, whichever is shorter

24
Q

What are Fuel Combustion Gases?

A

*Stack Gas

gases that accumulate due to inadequate ventilation or machinery malfunction

25
Q

What does Stack Gas do to body?

A

Vasodilatation on peripheral blood vessels

26
Q

Signs/Symptoms of Stack Gas

A
  • Watery Eyes
  • Dyspnea
  • Tingling/numbness of tip of tongue/nose/fingers/toes
27
Q

Action for Fuel Combustion Gas?

A
  • Reduce exposure limits if two or more exposure symptoms

* Determine new PHEL using Table B2-A-5 or divide current Stay Time by 3

28
Q

When must MDR provide heat stress training?

A
  • INDOC

* Annually

29
Q

What must Heat Stress training include?

A
  • Hazards
  • Exposure Symptoms
  • Heat Stress First Aid
  • Heat Stress Monitoring
  • Causes of Heat Stress
30
Q

Within how many weeks must training be conduct upon assignment?

A

12 weeks

* Complete PQS 318 Heat Stress Surveyor

31
Q

How are Heat Stress Injuries Reported?

A
  • Accident and Injury Report ( local command)
  • Naval Disease Reporting System ( NDRS)
  • Web Enabled Safety System WESS ( Naval Safety Center)
  • Medical Event Report if command does not have access to NDRS
32
Q

Who reviews Heat stress monitoring reports and conducts QA checks?

A

SMDR

* SMDR will make recommendation based on crew health status

33
Q

What must surveyor check to ensure is correct on survey?

A

WB < DB
GT >= DB
WB< WBGT < GT

34
Q

Who must be informed of stay times prior to Engineering Casualty or Damage Control Training Team (ECCTT/DCTT) drills?

A

Drill Supervisor

35
Q

Who are heat stress reports routed to and when?

A
  • XO/CO ( CO ultimate approval for stay time reductions)

* 8 o’clock reports (no admin controls required)

36
Q

Who retains all heat stress reports and for how long?

A

SMDR

1 year

37
Q

Function of DB?

A
  • Measure ambient air temp at work sites

* Indicator for further heat stress monitoring by use of WBGT meter

38
Q

Placement of HGB?

A
  • Permanently mounted at watch/work stations
  • Temporarily mounted at temporary work sites
  • Properly shielded from radiant heat levels or influencing (heat/cold) factors
39
Q

Accuracy of DB?

A
  • must be within 4 degrees of WBGT meter

* if outside 4 degrees, shall be re-positioned

40
Q

When are DB Temps read?

A
  • Every 4 hours if DB temp does not exceed 85 degrees

* Read hourly if a) heat casualty or b) DB temp exceeds 85 degrees F

41
Q

How are DB temps recorded?

A
  • Appropriate log sheet
  • Reviewed by Supervisor once per watch/shift
  • Circled in red if 100 F or higher (notify supervisor immediately and monitor space with WGBT meter)
42
Q

What does Heat Stress Meter measure?

A
  • DB sensor (ambient)
  • WB (Humidity)
  • GT (Radiant)
43
Q

Information about DB Temp Sensor?

A
  • Measured with alcohol-in-glass thermometer

* Bulb kept dry and shielded from radiation

44
Q

Information about WB Temp Sensor?

A

Measured with a thermometer (similar to DB) except a wet wick is fitted closely over bulb

45
Q

Info about GT Sensor?

A

Integration of radiant and convective (heating/cooling effects of air movement) heat transfer

46
Q

WBGT Index?

A

Weighted average of DB, WB, and GT
Equation:
(0.1xDB)+(0.7xWB)+(0.2xGT)

47
Q

Purpose of WBGT?

A

Helps determine Physiological Heat Exposure Limit (PHEL) and Environmental heat stress conditions by computing WBGT Index

48
Q

Two types of WBGT Meter/Monitor

A
  • RSS-220 WBGT Meter

* QuesTemp 48N Heat Stress Monitor

49
Q

Required Monitoring Conditions (Survey)

A
  • PHEL I-III when work is <= 4 hrs and DB >= 100 F
  • PHEL I-III when work is > 4 hrs and DB is >= 90 F
  • PHEL IV-VI and DB >= 85 F
  • When heat causality occurs
  • During a drill > 3 hrs in duration
  • Directed by CO
50
Q

When are Follow-on Surveys conducted?

A
  • Stay time greater than watch ( if HDB increases by 5 F)

* Stay time less than normal watch ( If HDB increases by 5 F OR temperature returns to normal

51
Q

Calibration Checks RSS-220 WBGT Meter?

A

Acceptable range is 100.0 plus/minus 0.2 degrees Fahrenheit

52
Q

Survey Procedures for RSS-220 WBGT Meter

A
  • Place at watch stander’s normal working position
  • Wait 5 min for initial DB reading & 3 min for subsequent readings
  • DB/WB sensors face air flow
  • Hold meter chest level approx. 1 foot away from body
53
Q

Info on QuesTemp 48N Heat Stress Monitor

A
  • Turn on, if battery equal to or lower than 6.4 volts, replace/recharge
  • Sensor required to wait 10 min after turning on to take initial reading
  • if sensor moved, wait 5 min to allow for stabilization
  • Hold meter chest level, 18 inches away from body
54
Q

Info documented from WBGT readings

A

1) Specific Locations monitored
2) HGB Temp
3) WBGT readings (DB, WB, GT, and WBGT Index)
4) Determined Exposure limits
5) next WBGT monitoring time
6) Availability of Potable water
7) Manual Calculation of WBGT Index
8) Any noted discrepancies
9) Circle in red all exposure limits less than the watch period

55
Q

Routing of Survey

A
  • Immediately notify supervisor
  • Supervisors (DH) shall notify CO with:
  • Condition
  • Personal Protective Measures
  • Action to reduce heat (noted on Heat Stress Monitoring Sheet)

NAVOSH 5.5 - 5.8 (1 decks)

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