ing design criteria for the space station. The SMAC reports will also be applicable to the space shuttle, because the recommended SMACs will cover the exposure times that are of interest to the space-shuttle program—1-hr and 24-hr SMACs for emergencies and 7-day and 30-day SMACs for continuous exposures.

The subcommittee's review of the SMAC reports prepared by NASA, NASA's contractors, and members of the subcommittee involved both oral and written presentations to the subcommittee by the authors of the reports. The subcommittee provided advice and recommendations for revisions. The authors of the SMAC reports presented their revised reports at subsequent meetings until approved by the subcommittee, which depended upon the appropriate application of the guidelines developed in the first phase of the study (NRC, 1992).

The subcommittee recognizes that many factors, such as the alterations in normal human physiological and biochemical processes associated with spaceflight, are not fully understood and could warrant revisions of proposed SMAC values as additional scientific data become available. Because of the enormity of the data presented in the SMAC reports, the subcommittee could not verify all the data. The subcommittee relied on NASA scientists for the accuracy and completeness of the toxicity data cited in the SMAC reports. Although individual data points were not verfied by the subcommittee, it agrees with the proposed SMAC values.

This report is the first volume in the series Spacecraft Maximum Allowable Concentrations for Selected Contaminants. It contains SMAC reports on 11 spacecraft contaminants; these reports, presented in Appendix B, are approved by the subcommittee as consistent with the 1992 NRC guidelines. SMAC reports for additional spacecraft contaminants will be presented in subsequent volumes.

REFERENCES

NRC (National Research Council). 1968. Atmospheric Contaminants in Spacecraft. Washington, D.C.: National Academy of Sciences.

NRC (National Research Council). 1972. Atmospheric Contaminants in Manned Spacecraft. Washington, D.C.: National Academy of Sciences.



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement



Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text on the opening pages of each chapter. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

Do not use for reproduction, copying, pasting, or reading; exclusively for search engines.

OCR for page 5
Spacecraft Maximum Allowable Concentrations for Selected Airborne Contaminants ing design criteria for the space station. The SMAC reports will also be applicable to the space shuttle, because the recommended SMACs will cover the exposure times that are of interest to the space-shuttle program—1-hr and 24-hr SMACs for emergencies and 7-day and 30-day SMACs for continuous exposures. The subcommittee's review of the SMAC reports prepared by NASA, NASA's contractors, and members of the subcommittee involved both oral and written presentations to the subcommittee by the authors of the reports. The subcommittee provided advice and recommendations for revisions. The authors of the SMAC reports presented their revised reports at subsequent meetings until approved by the subcommittee, which depended upon the appropriate application of the guidelines developed in the first phase of the study (NRC, 1992). The subcommittee recognizes that many factors, such as the alterations in normal human physiological and biochemical processes associated with spaceflight, are not fully understood and could warrant revisions of proposed SMAC values as additional scientific data become available. Because of the enormity of the data presented in the SMAC reports, the subcommittee could not verify all the data. The subcommittee relied on NASA scientists for the accuracy and completeness of the toxicity data cited in the SMAC reports. Although individual data points were not verfied by the subcommittee, it agrees with the proposed SMAC values. This report is the first volume in the series Spacecraft Maximum Allowable Concentrations for Selected Contaminants. It contains SMAC reports on 11 spacecraft contaminants; these reports, presented in Appendix B, are approved by the subcommittee as consistent with the 1992 NRC guidelines. SMAC reports for additional spacecraft contaminants will be presented in subsequent volumes. REFERENCES NRC (National Research Council). 1968. Atmospheric Contaminants in Spacecraft. Washington, D.C.: National Academy of Sciences. NRC (National Research Council). 1972. Atmospheric Contaminants in Manned Spacecraft. Washington, D.C.: National Academy of Sciences.

OCR for page 5
Spacecraft Maximum Allowable Concentrations for Selected Airborne Contaminants NRC (National Research Council). 1984a. Emergency and Continuous Exposure Limits for Selected Airborne Contaminants , Vol. 1 . Washington, D.C.: National Academy Press. NRC (National Research Council). 1984b. Emergency and Continuous Exposure Limits for Selected Airborne Contaminants , Vol. 2 . Washington, D.C.: National Academy Press. NRC (National Research Council). 1984c. Emergency and Continuous Exposure Limits for Selected Airborne Contaminants , Vol. 3 . Washington, D.C.: National Academy Press. NRC (National Research Council). 1984d. Toxicity Testing: Strategies to Determine Needs and Priorities. Washington, D.C.: National Academy Press. NRC (National Research Council). 1985a. Emergency and Continuous Exposure Guidance Levels for Selected Airborne Contaminants , Vol. 4 . Washington, D.C.: National Academy Press. NRC (National Research Council). 1985b. Emergency and Continuous Exposure Guidance Levels for Selected Airborne Contaminants , Vol. 5 . Washington, D.C.: National Academy Press. NRC (National Research Council). 1986. Emergency and Continuous Exposure Guidance Levels for Selected Airborne Contaminants , Vol. 6 . Washington, D.C.: National Academy Press. NRC (National Research Council). 1987. Emergency and Continuous Exposure Guidance Levels for Selected Airborne Contaminants , Vol. 7 . Washington, D.C.: National Academy Press. NRC (National Research Council). 1988. Emergency and Continuous Exposure Guidance Levels for Selected Airborne Contaminants , Vol. 8 . Washington, D.C.: National Academy Press. NRC (National Research Council). 1992. Guidelines for Developing Spacecraft Maximum Allowable Concentrations for Space Station Contaminants , Washington, D.C.: National Academy Press.