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Cryogenic Liquid Hazards and Controls

    Title:

    Cryogenic Liquid Hazards and Controls

    Publication date:

    9/10/2013

    Effective date:

    1/29/2010

    BRIEF

    Policy Summary

    This policy describes the restrictions and conditions for persons who handle cryogens or who operate cryogenic-liquid-handling systems at Berkeley Lab.
    Cryogenic liquids include, but are not limited to, liquid nitrogen, liquid helium, and liquid argon.

    Who Should Read This Policy

    Berkeley Lab employees, visitors, affiliates, and subcontractors who handle cryogens or who operate cryogenic-liquid-handling systems at Berkeley Lab

    To Read the Full Policy, Go To:

    The POLICY tab on this wiki page

    To Read the EH&S Program Details, Go To:

    http://www.lbl.gov/ehs/pub3000/CH29/CH29.html

    Contact Information

    For assistance on cryogenic-liquid applications, including safety engineering and industrial hygiene, contact:
    EH&S Division
    Subject Matter Expert for Cryogens
    Joe Dionne
    (510) 486-7586
    JEDionne@lbl.gov

    For assistance with cryogenic system repairs, maintenance, and modifications, contact:
    Facilities Division
    Mike Botello
    (510) 486-7941
    MLBotello@lbl.gov

    Title:

    Cryogenic Liquid Hazards and Controls

    Publication date:

    9/10/2013

    Effective date:

    1/29/2010

    POLICY

    A. Purpose

    This policy describes the restrictions and conditions for persons who handle cryogens or who operate cryogenic-liquid-handling systems at Lawrence Berkeley National Laboratory (Berkeley Lab).
    Cryogenic liquids include, but are not limited to, liquid nitrogen, liquid helium, and liquid argon.

    B. Persons Affected

    Berkeley Lab employees, visitors, affiliates, and subcontractors who handle cryogens or who operate cryogenic-liquid-handling systems at the Laboratory

    C. Exceptions

    None

    D. Policy Statement

    1. The primary hazards associated with cryogenic liquids are:
      1. Thermal hazards due to extremely low temperatures
      2. Pressurization hazards due to inadequate venting
      3. Oxygen deficiency due to oxygen displacement (for inert cryogens)

        There are additional hazards including any hazardous characteristics associated with the cryogenic liquid (e.g., flammability of hydrogen). See Work Processes A and F for more details on hazards.
    2. Cryogenic liquids are obtained by:
      1. The Principal Investigator placing an order for a portable cryogenic liquid dewar through a request to the on-site chemical supplier or
      2. The Principal Investigator making a request to the Facilities Division to connect to a cryogenics liquid tank (the Facilities Division has responsibility for the Laboratory's bulk cryogenic systems and for their safe design, operation, and maintenance.)
    3. Orders and Facilities Requests should be followed with a note or call to the Cryogenic Liquids Subject Matter Expert (SME) to start assessment processes.
    4. Before work with cryogenic liquids is undertaken, an oxygen-deficiency risk assessment must be conducted (Work Process A).
    5. Prior to use, persons who handle cryogens or who operate cryogenic-liquid-handling systems at Berkeley Lab must complete training that covers:
      • Awareness of hazards related to the equipment
      • Methods for controlling those hazards
      • Proper operating procedures applicable to the equipment (Work Process B)
    6. Ensure all hazards associated with the handling of cryogenic liquids in an area are identified and controlled (Work Processes C, D, E, F. J, K, and L).
    7. Line management must ensure:
      1. Only equipment intended for cryogenic service is used
      2. Equipment, commercial or otherwise, is not modified in a fashion that could defeat the designed safety features of the equipment or otherwise create an unforeseen hazard, such as inadequate venting of cryogen spaces
      3. Equipment is appropriately designed, fabricated, and used for cryogenic use (See Work Processes D, J, K, and L of Pub-3000 Chapter 29.
    8. Users of cryogenic systems must follow training guidance and written procedures covering:
      1. Operation of cryogenics systems (Work Processes G, H, I, J, K, L, and M)
      2. Use of controls for cryogenic liquid handling, including personal protective equipment (PPE) (Work Processes C, D, H and I)
      3. Transportation of cryogenic liquids (Work Process N)
      4. Disposal of cryogenic materials (Work Process O)
      5. Reporting of incidents with cryogenic liquids (Work Process P)

    E. Roles and Responsibilities

    See Pub-3000 for roles and responsibilities related to the execution of this policy's implementation.

    Role

    Responsibility

    Facilities Division

    Oversees the Laboratory's bulk cryogenic systems and their safe design, operation, and maintenance

    Industrial Hygiene SME

    Is responsible for development, approval, revision, and administration of this policy and its implementing documents

    Line Managers

    Ensure that persons within their areas of responsibility comply with this policy and its implementing documents

    Supervisors and Work Leads

    Ensure that persons within their areas of responsibility comply with this policy and its implementing documents, and in particular have completed the required training prior to beginning work

    Cryogenic Liquid Users

    Follow all guidance provided in training and Work Processes to safety use, transport, and dispose of cryogenic liquids

    F. Definitions/Acronyms

    See PUB-3000 Chapter 29) for technical terms related to the details of this policy and its implementation.

    Term

    Definition

    Cryogenic Liquid

    A material whose boiling point is less than 120 degrees Kelvin. The typical cryogenic materials used at Berkeley Lab include but are not limited to liquid nitrogen, liquid helium, and liquid argon.

     

     

    G. Recordkeeping Requirements

    Role

    Recordkeeping Requirement

    Subject Matter Expert

    Oxygen-Deficiency Risk Assessments

    Subject Matter Expert

    Cryogenic Safety Training Records

    Subject Matter Expert

    Activity Hazard Document

    Hazardous Waste Office

    Hazardous Waste Manifests

    H. Implementing Documents

    Document Number

    EH&S Reference Numbers

    Title

    Type

    07.07.009.001

    Ch. 29

    Cryogenic Liquids

    Program

    07.07.026.001

    Ch. 7

    Pressure Safety and Cryogenics

    Program

    07.07.009.002

    Ch. 29, Work Process A

    Oxygen-Deficiency Risk Assessment

    Process

    07.07.009.003

    Ch. 29, Work Process B

    Cryogen Safety Training

    Process

    07.07.009.004

    Ch. 29, Work Process C

    Personal Protective Equipment for Handling Cryogenic Liquids

    Process

    07.07.009.005

    Ch. 29, Work Process D

    Controls for Handling Cryogenic Liquids

    Process

    07.07.009.006

    Ch. 29, Work Process E

    Activity Hazard Document

    Process

    07.07.009.007

    Ch. 29, Work Process F

    Identifying Hazards Associated with Inert Cryogenic Liquids

    Process

    07.07.009.008

    Ch 29, Work Process G

    Sample Instructions for Operating a LN2 Fill Station

    Process

    07.07.009.009

    Ch 29, Work Process H

    Sample Calculations for Oxygen Deficiency Involving the Filling of LN2 Dewars

    Process

    07.07.009.010

    Ch 29, Work Process I

    Guidance for Handling Cryogenic-Liquid Equipment

    Process

    07.07.009.011

    Ch 29, Work Process J

    Guidance for Materials of Construction

    Process

    07.07.009.012

    Ch 29, Work Process K

    Continuous Oxygen-Monitoring Systems

    Process

    07.07.009.013

    Ch 29, Work Process L

    Cryogen Signs

    Process

    07.07.009.014

    Ch 29, Work Process M

    Operational Guidance

    Process

    07.07.009.015

    Ch 29, Work Process N

    Transporting Cryogen Dewars

    Process

    07.07.009.016

    Ch 29, Work Process O

    Waste Disposal

    Process

    07.07.009.017

    Ch 29, Work Process P

    ES&H Documentation and Reporting/Notification

    Process

    I. Contact Information

    For assistance on cryogenic-liquid applications, including safety engineering and industrial hygiene, contact:
    EH&S Subject Matter Expert for Cryogens
    Joe Dionne
    (510) 486-7586
    JEDionne@lbl.gov

    For assistance with cryogenic system repairs, maintenance, and modifications, contact:
    Facilities Division
    Mike Botello
    (510) 486-7941
    MLBotello@lbl.gov

    J. Revision History

    Date

    Revision

    By whom

    Revision Description

    Section(s) affected

    Change Type

    9/10/13

    1.1

    S.Robinson

    Reviewed 9/6/2013, no changes

    Publ & Next Review Dates

    Minor

    1/2/2012

    1

    J. Dionne

    Rewrite for wiki

    all

    Minor

    DOCUMENT INFORMATION

    Title:

    Cryogenic Liquid Hazards and Controls

    Document number

    07.07.009.000

    Revision number

    1.1

    Publication date:

    9/10/2013

    Effective date:

    1/29/2010

    Next review date:

    9/10/2016

    Policy Area:

    Industrial Hygiene and Safety

    RPM Section (home)

    ESH

    RPM Section (cross-reference)

    none

    Functional Division

    EH&S

    Prior reference information (optional)

    PUB-3000 Ch. 29

    Source Requirements Documents

    • 10 CFR 851.21(C)(a)(5), Worker Health and Safety Program; Hazard Identification and Assessment; Evaluate operations, procedures, and facilities to identify workplace hazards.
    • 10 CFR 851, Worker Safety and Health Program
    • 29 CFR 1910.101, Compressed Gases
    • 49 CFR 173.316, Cryogenic Liquids in Cylinders
    • ANSI/ASME B31.3, Process Piping
    • ASME Section VIII Division 1, Pressure Vessels

    Implementing Documents

    Document Number

    EH&S Reference Numbers

    Title

    Type

    07.07.009.001

    Ch. 29

    Cryogenic Liquids

    Program

    07.07.026.001

    Ch. 7

    Pressure Safety and Cryogenics

    Program

    07.07.009.002

    Ch. 29, Work Process A

    Oxygen-Deficiency Risk Assessment

    Process

    07.07.009.003

    Ch. 29, Work Process B

    Cryogen Safety Training

    Process

    07.07.009.004

    Ch. 29, Work Process C

    Personal Protective Equipment for Handling Cryogenic Liquids

    Process

    07.07.009.005

    Ch. 29, Work Process D

    Controls for Handling Cryogenic Liquids

    Process

    07.07.009.006

    Ch. 29, Work Process E

    Activity Hazard Document

    Process

    07.07.009.007

    Ch. 29, Work Process F

    Identifying Hazards Associated with Inert Cryogenic Liquids

    Process

    07.07.009.008

    Ch 29, Work Process G

    Sample Instructions for Operating a LN2 Fill Station

    Process

    07.07.009.009

    Ch 29, Work Process H

    Sample Calculations for Oxygen Deficiency Involving the Filling of LN2 Dewars

    Process

    07.07.009.010

    Ch 29, Work Process I

    Guidance for Handling Cryogenic-Liquid Equipment

    Process

    07.07.009.011

    Ch 29, Work Process J

    Guidance for Materials of Construction

    Process

    07.07.009.012

    Ch 29, Work Process K

    Continuous Oxygen-Monitoring Systems

    Process

    07.07.009.013

    Ch 29, Work Process L

    Cryogen Signs

    Process

    07.07.009.014

    Ch 29, Work Process M

    Operational Guidance

    Process

    07.07.009.015

    Ch 29, Work Process N

    Transporting Cryogen Dewars

    Process

    07.07.009.016

    Ch 29, Work Process O

    Waste Disposal

    Process

    07.07.009.017

    Ch 29, Work Process P

    ES&H Documentation and Reporting/Notification

    Process

    Other References

    • Compressed Gas Association, Pamphlet P-12, Safe Handling of Cryogenic Liquids
    • Compressed Gas Association, Pamphlet P-12, Safe Handling of Cryogenic Liquids, 6.7
    • NFPA 55, Standard for the Storage, Use, and Handling of Compressed Gases and Cryogenic Liquids in Portable and Stationary Containers, Cylinders, and Tanks
    • Public Law 91-596, Occupational Safety and Health Act of 1970
    • International Fire Code (IFC) Chapter 32 "Cryogenic Fluids"
    • DOE Guide 440.1-8, Implementation Guide for Use with 10 CFR Part 851, Worker Safety and Health Program, Section 3.3.2.1.5

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