Use of MAG-1 spectacles with positive- and negative-pressure respirators
Results of testing conducted at Los Alamos National Laboratory, Personnel Protection Studies Section, using MAG-1 spectacles in conjunction with positive- and negative-pressure full-facepiece respirators, are reported. The purpose of the three-phase study was to determine if the specially constructed strap of the MAG-1s affected the protection factors (PFs) of the respirators or the cylinder life of selected self-contained breathing apparatus (SCBA). The following respirators were tested with the MAG-1s: (1) Phases I and II, positive-pressure full facepiece: Presur-Pak II SCBA (pressure-demand) Scottoramic facepiece, MSA 401 Air Mask Ultravue facepiece (medium), Survivair pressure-demand SCBA/silicone full facepiece, MSA powered air-purifying respirator/Ultravue facepiece (medium); and (2) Phase III, negative-pressure full facepiece: MSA Ultravue (small, medium, large), MSA Ultra-twin (small, medium, large), Norton Series 7600 (one size only). Statistical analysis and review of the test data from Phases I and II indicated little, if any, variation with and without the MAG-1s with most protection factors greater than 10,000. Test data also indicated little, if any, difference in the cylinder life with and without the MAG-1s, except the Scott Presur-Pak II SCBA used with the Scottoramic facepiece. Statistical analysis of the quantitative fit test data indicated no difference in PFs for the negative-pressure devices for the Ultravue negative-pressure respirator, but a significance at the 0.05 and 0.01 levels for the Ultra-twin and Norton full facepieces, respectively.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5828790
- Report Number(s):
- NUREG/CR-3953; LA-10229-MS; ON: TI85010351
- Country of Publication:
- United States
- Language:
- English
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