Policy for Work on Beamline and Front-End Shielding Components
Scope
For the purposes of this policy and procedure, any beamline or front-end component that is used to provide radiation protection for personnel is referred to as a beamline shielding component.
Beamline shielding components include:
- shutters,
- beam stops,
- collimators and masks required to define beams for the shutters and stops,
- shielded beam transport, and
- shielded enclosures.
Beamline shielding components do not include:
- beamline optics (e.g., monochromators, mirrors),
- apertures, slits, and masks that define the optics beam but are not required for shielding purposes,
- unshielded beam transport (e.g., for beam propagation but not shielding).
This policy covers the commissioning, maintenance, repair, or other modification of any beamline shielding component.
This policy does not apply to the normal operation of engineered shielding component controls (e.g., actuating a shutter, opening or closing a permanently installed manual shutter or stop, opening or closing an enclosure labyrinth or station door, etc.).
Policy
The management of the installation, maintenance, repair, or modification of beamline shielding components is the responsibility of the APS. The APS Operations Division (AOD) is responsible for overseeing all work on beamline shielding components and a Critical Component System Manager (CCSM) has been assigned the primary responsibility to provide seamless coordination of this work.
In order to maintain a high level of safety, each person and group that requests or takes part in work on beamline shielding components should be aware that there are safety implications of their requests or activities. Further, if they are aware of a potentially unsafe situation resulting from the work, then the component or system is to be secured until the questions are resolved.
To ensure that each component is installed or brought back into operation safely, the work will be coordinated by the CCSM. The CCSM's responsibilities include:
- ensuring that the scope of work is clearly defined,
- verifying that the proper technical groups are involved in the work and that each has adequate procedures to safely complete the work,
- ensuring that the procedures of various groups involved in the work are integrated, and
- facilitating that standards, specifications, operational safety envelope requirements, and procedures for work on beamline shielding components (e.g., alignment specifications and tolerances, component drawings, repair procedures, validation procedures, etc.) are available from the appropriate technical groups, and available to the workers/groups that require the information.
If the component is a new installation or a modification of an existing design, which operates outside of the safety/performance envelope of previous design reviews, the component shall not be brought into operation until the design and use are reviewed and approved by the appropriate design review committee.
For newly installed components, the CCSM will work in concert with the Beamline Commissioning Readiness Review Team to ensure that the design/operational requirements records are in place.
At the discretion of the CSSM or designee, this work may be performed by non-ANL personnel, using APS-approved procedures and under the APS' supervision.
To close out any work permits and prior to bringing the beamline/front end back on line:
- the person[s] responsible for performing the work shall certify that the work on the component is complete and that to the best of their knowledge, the device is ready for safe operation,
- the requestor and a representative of the group that is responsible for the operational maintenance (if different from the requestor) shall confirm that the beamline/front end is ready for safe operation, and
- the CCSM shall verify that the beamline/front end is ready for safe operation.
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Effective Date: proposed - 20 October 2003 |
