|Chapter 6670 Thermal Stress|
Jefferson Lab defines thermal stress as the physical and physiological reactions of a worker to temperatures that fall outside the normal comfort zone. The potential for heat and cold stress at Jefferson Lab exists mainly during the summer and winter months.Scope
Mitigation actions are used to reduce thermal stress hazard conditions. The actions defined within this section meet or exceed the contractual requirements of 10 CFR 851.
Jefferson Lab recognizes that the most effective mitigation technique for thermal stress conditions is to wear appropriate clothing, and personal protective equipment. Work planning at Jefferson Lab, particularly during the summer months, considers ambient temperature and implements mitigation techniques as required.
Jefferson Lab uses the National Weather Service Heat Stress Index for areas exposed to ambient conditions. For temperature monitoring, application guidelines, and calculations, the 2016 Threshold Limit Values for Physical Agents in the Work Environment section on Thermal Stress - Heat Stress & Heat Strain is used (measured as the Wet Bulb Globe Temperature (WBGT)).
This chapter does not address specific hazards or injuries resulting from sudden exposure to cryogenic materials. (See ES&H Manual Chapter 6550 Cryogenic Safety Program.)
T1 Heat Stress Mitigation
Areas of known routine hot working environments for all or part of the year are monitored on a periodic basis. ES&H Manual Chapter 6670 Appendix T1 Heat Stress Mitigation addresses the procedure used to monitor and mitigate potential injury or illness due to heat stress.
T2 Cold Stress Work Cessation Procedure
As of the approval date of this chapter, there are no known work environments with temperatures that would be considered cold stress areas. One area with routine cold conditions is the food refrigeration area of CEBAF Center. However, this area is not occupied for continuous work but only visited as needed. ES&H Manual Chapter 6670 Appendix T2 Cold Stress Work Cessation Procedure addresses the procedure used to mitigate potential injury or illness due to cold stress.
Management responsibility may be delegated to a task qualified Jefferson Lab employee at the discretion of the responsible manager.
Everyone at Jefferson Lab
Facilities Management and Logistics
Supervisor/Subcontracting Officer's Technical Representative (SOTR)/Sponsor
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