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Title: Vacuum Systems Consensus Guideline for Department of Energy Accelerator Laboratories

Abstract

Vacuum vessels, including evacuated chambers and insulated jacketed dewars, can pose a potential hazard to equipment and personnel from collapse, rupture due to back-fill pressurization, or implosion due to vacuum window failure. It is therefore important to design and operate vacuum systems in accordance with applicable and sound engineering principles. 10 CFR 851 defines requirements for pressure systems that also apply to vacuum vessels subject to back-fill pressurization. Such vacuum vessels are potentially subject to the requirements of the American Society of Mechanical Engineers (ASME) Pressure Vessel Code Section VIII (hereafter referred to as the 'Code'). However, the scope of the Code excludes vessels with internal or external operating pressure that do not exceed 15 pounds per square inch gauge (psig). Therefore, the requirements of the Code do not apply to vacuum systems provided that adequate pressure relief assures that the maximum internal pressure within the vacuum vessel is limited to less than 15 psig from all credible pressure sources, including failure scenarios. Vacuum vessels that cannot be protected from pressurization exceeding 15 psig are subject to the requirements of the Code. 10 CFR 851, Appendix A, Part 4, Pressure Safety, Section C addresses vacuum system requirements for such casesmore » as follows: (c) When national consensus codes are not applicable (because of pressure range, vessel geometry, use of special materials, etc.), contractors must implement measures to provide equivalent protection and ensure a level of safety greater than or equal to the level of protection afforded by the ASME or applicable state or local code. Measures must include the following: (1) Design drawings, sketches, and calculations must be reviewed and approved by a qualified independent design professional (i.e., professional engineer). Documented organizational peer review is acceptable. (2) Qualified personnel must be used to perform examinations and inspections of materials, in-process fabrications, non-destructive tests, and acceptance test. (3) Documentation, traceability, and accountability must be maintained for each unique pressure vessel or system, including descriptions of design, pressure conditions, testing, inspection, operation, repair, and maintenance. The purpose of this guideline is to establish a set of expectations and recommendations which will satisfy the requirements for vacuum vessels in general and particularly when an equivalent level of safety as required by 10 CFR 851 must be provided. It should be noted that these guidelines are not binding on DOE Accelerator Laboratories and that other approaches may be equally acceptable in addressing the Part 851 requirements.« less

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
944956
Report Number(s):
BNL-81715-2008-IR
R&D Project: 71303; TRN: US0900801
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; DEWARS; DOCUMENTATION; ENGINEERS; GEOMETRY; IMPLOSIONS; MAINTENANCE; PERSONNEL; PRESSURE RANGE; PRESSURE VESSELS; PRESSURIZATION; RECOMMENDATIONS; REPAIR; RUPTURES; SAFETY; TESTING; VACUUM SYSTEMS; WINDOWS

Citation Formats

Casey,R., Haas, E., Hseuh, H-C., Kane, S., Lessard, E., Sharma, S., Collins, J., Toter, W. F., Olis, D. R., Pushka, D. R., Ladd, P., and Jobe, R. K. Vacuum Systems Consensus Guideline for Department of Energy Accelerator Laboratories. United States: N. p., 2008. Web. doi:10.2172/944956.
Casey,R., Haas, E., Hseuh, H-C., Kane, S., Lessard, E., Sharma, S., Collins, J., Toter, W. F., Olis, D. R., Pushka, D. R., Ladd, P., & Jobe, R. K. Vacuum Systems Consensus Guideline for Department of Energy Accelerator Laboratories. United States. doi:10.2172/944956.
Casey,R., Haas, E., Hseuh, H-C., Kane, S., Lessard, E., Sharma, S., Collins, J., Toter, W. F., Olis, D. R., Pushka, D. R., Ladd, P., and Jobe, R. K. Tue . "Vacuum Systems Consensus Guideline for Department of Energy Accelerator Laboratories". United States. doi:10.2172/944956. https://www.osti.gov/servlets/purl/944956.
@article{osti_944956,
title = {Vacuum Systems Consensus Guideline for Department of Energy Accelerator Laboratories},
author = {Casey,R. and Haas, E. and Hseuh, H-C. and Kane, S. and Lessard, E. and Sharma, S. and Collins, J. and Toter, W. F. and Olis, D. R. and Pushka, D. R. and Ladd, P. and Jobe, R. K.},
abstractNote = {Vacuum vessels, including evacuated chambers and insulated jacketed dewars, can pose a potential hazard to equipment and personnel from collapse, rupture due to back-fill pressurization, or implosion due to vacuum window failure. It is therefore important to design and operate vacuum systems in accordance with applicable and sound engineering principles. 10 CFR 851 defines requirements for pressure systems that also apply to vacuum vessels subject to back-fill pressurization. Such vacuum vessels are potentially subject to the requirements of the American Society of Mechanical Engineers (ASME) Pressure Vessel Code Section VIII (hereafter referred to as the 'Code'). However, the scope of the Code excludes vessels with internal or external operating pressure that do not exceed 15 pounds per square inch gauge (psig). Therefore, the requirements of the Code do not apply to vacuum systems provided that adequate pressure relief assures that the maximum internal pressure within the vacuum vessel is limited to less than 15 psig from all credible pressure sources, including failure scenarios. Vacuum vessels that cannot be protected from pressurization exceeding 15 psig are subject to the requirements of the Code. 10 CFR 851, Appendix A, Part 4, Pressure Safety, Section C addresses vacuum system requirements for such cases as follows: (c) When national consensus codes are not applicable (because of pressure range, vessel geometry, use of special materials, etc.), contractors must implement measures to provide equivalent protection and ensure a level of safety greater than or equal to the level of protection afforded by the ASME or applicable state or local code. Measures must include the following: (1) Design drawings, sketches, and calculations must be reviewed and approved by a qualified independent design professional (i.e., professional engineer). Documented organizational peer review is acceptable. (2) Qualified personnel must be used to perform examinations and inspections of materials, in-process fabrications, non-destructive tests, and acceptance test. (3) Documentation, traceability, and accountability must be maintained for each unique pressure vessel or system, including descriptions of design, pressure conditions, testing, inspection, operation, repair, and maintenance. The purpose of this guideline is to establish a set of expectations and recommendations which will satisfy the requirements for vacuum vessels in general and particularly when an equivalent level of safety as required by 10 CFR 851 must be provided. It should be noted that these guidelines are not binding on DOE Accelerator Laboratories and that other approaches may be equally acceptable in addressing the Part 851 requirements.},
doi = {10.2172/944956},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {9}
}

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