ASTM C1661-23 PDF

Overview

ASTM C1661-23, Standard Guide for Viewing Systems for Remotely Operated Facilities, is published by ASTM International. This guide establishes the minimum requirements and best practices for designing, selecting, installing, fabricating, modifying, and assuring the quality of remote viewing systems in facilities such as hot cells used for nuclear or radioactive material processing and handling. The standard is intended to increase operational effectiveness and system longevity, reduce equipment failures, and ensure safe, dependable operation in environments where direct human access is limited by radiation hazards or other safety constraints.

Key Topics

• Scope and Coverage: ASTM C1661-23 applies broadly to remote viewing equipment in any remotely operated facility where hazardous or restricted environments require advanced visual access. This includes nuclear facilities, hot cells (shielded enclosures), and other scenarios where operator visibility is restricted.

• Types of Remote Viewing Equipment: The guide addresses a wide range of remote viewing systems and components, such as:

  • Radiation hardened and non-hardened cameras (black-and-white, color)
  • Lenses, camera housings, and positioners
  • Periscopes and through-wall/roof viewing systems
  • Remotely deployable, crane- or robot-mounted, and endoscope cameras
  • Borescopes, videoprobes, flexible probes, and mirrors
  • Specialized lighting, including fiber optic illumination
  • Associated support equipment

• Design and Operational Guidelines:

  • Emphasizes early inclusion of remote viewing provisions in the facility design and construction phases for optimal performance and reliability
  • Details principles and caveats for system design, installation, maintenance, repair, and decommissioning based on operating experience
  • Outlines best practices for minimizing failures and maximizing utility in high-radiation and hard-to-access environments

• Quality Assurance: Highlights the importance of implementing robust quality assurance programs, referencing compliance requirements such as 10 CFR 830.120, 10 CFR 50 Appendix B, ANSI/ASME NQA-1, and ISO 9001.

• Safety and Regulatory Compliance: The guide supplements and does not replace applicable federal and state regulations, codes, and standards governing nuclear facility design and operation.

Applications

Nuclear and Radiological Facilities

• Hot Cells: Used extensively in shielded "hot cell" environments for manipulating and inspecting radioactive substances without direct human exposure.
• Remote Maintenance: Enables visual monitoring and troubleshooting of equipment in areas where entry is hazardous or impractical.
• Specialized Inspections: Facilitates inspection of restricted or shielded sections of facilities, such as the underside or interior of components that cannot be viewed directly.
• Long- and Short-term Operations: Supports both permanent installations for facility monitoring and temporary deployments for specific maintenance or troubleshooting tasks.

Other Hazardous or Inaccessible Environments

While developed primarily for nuclear applications, the guidelines of ASTM C1661-23 are applicable in any setting where remote or robotic viewing is desirable due to safety, contamination, or accessibility issues.

Related Standards

When implementing remote viewing systems in regulated environments, ASTM C1661-23 should be used in conjunction with other relevant standards, including:

• ASTM C1533: Guide for General Design Considerations for Hot Cell Equipment
• ASTM C1554: Guide for Materials Handling Equipment for Hot Cells
• ASTM C1572/C1572M: Guide for Lead Glass Radiation Shielding Window Components
• ANSI/ASME NQA-1: Quality Assurance Requirements for Nuclear Facility Applications
• ISO 9001: Quality management systems - Requirements
• 10CFR50 Appendix B, 10CFR830.120: U.S. Federal regulations for nuclear quality assurance
• Relevant terminology standards: ASTM C859, E170

Practical Value

Implementing the recommendations of ASTM C1661-23 enhances reliability, operational safety, and regulatory compliance for viewing systems in remotely operated facilities. By following this guide during design, installation, and maintenance, organizations can minimize downtime, reduce maintenance and replacement costs, and protect both personnel and asset integrity in challenging environments.

Keywords: ASTM C1661-23, remote viewing systems, hot cell, nuclear facility viewing, radiation hardened camera, remote monitoring standards, nuclear safety, quality assurance, remote operated equipment.