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Radiological Safety and Response RPT-243-PE-4. Posting. Learning Outcomes Upon completion of this lesson, the student will be able to (cont’d): .

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learning outcomes upon completion of this lesson the student will be able to cont d
Learning OutcomesUpon completion of this lesson, the student will be able to (cont’d):
  • Post any radiologically controlled area in accordance with the regulations when provided survey information, radiological profile information, posting material and local guidance.
  • Describe precautions and survey techniques for entering an area where radiation levels are unknown.
  • Demonstrate actions that should be taken if radiological conditions significantly different from those indicated by the posting.
outline
Outline
  • Explanation
  • Mini-Lecture and Demo for Posting Techniques
  • Section 1 – COP Surveillance
  • Section 2 – Posting Construction and Placement
  • Debrief
explanation
Explanation
  • The same team assignments made in PE-1 will continue into this PE.
  • The teams will be sub-divided into two person sub-teams.
  • This PE has two sections.
    • The first section involves the teams performing a surveillance under the Compliance Observation Program (COP).
    • The second section involves the teams demonstrating the ability to construct and place a barrier rope with posting in place.
explanation1
Explanation
  • The teams will be held accountable for the use of proper three-part communication and human performance tools during the PE.
  • The exercise will start with a mini-lecture on proper posting techniques and will include a pre-job briefing for the scenario.
  • At the conclusion of the practical portion, a team debrief may be held if time permits.
in general
In General…
  • Each station issues procedures that describe the details of their posting standards.
  • In many cases, the local standard is more conservative than the regulatory requirements.
  • For example:
    • The standard for regulations in posting a radiation area is 5 mrem/hr general area dose rates.
    • The local standard may be that radiation areas are posted at 2.5 mrem/hr.
in general1
In General…
  • The regulations say the words “Caution” and “Radiation Area” are to be used.
  • The station may require additional wording such as “RWP Required for Entry” and “Dosimetry Required for Entry”
  • “Notify HP Prior to Entry” may be another locally imposed posting required.
in general2
In General…
    • Colored inserts may also be used to enable differentiation of hazards on a common posting sign.
    • Unique shapes may be specified such as a triangle shaped sign for Locked High Radiation Areas
  • Other techniques may be stipulated through training, department policy or “standing orders” such as:
    • the need to secure the ends of a rope using a specific technique.
in general3
In General…
  • The need to tape or otherwise secure inserts in the holder
  • The requirement to place entry barriers for radiological areas without step-off pads (SOPs) at a height of five feet secured on both ends
  • The requirement to place barrier rope at SOPs secured at one end with a hooking device on the other
  • The requirement that signs not be placed on doors that might be blocked open unless a back-up barrier is erected.
the atc rpt standard
The ATC-RPT Standard
  • For the purposes of our PEs, the posting standards that will be used are shown in the following pictures and as described here:
    • Every posted area will have the wording “Caution” “Radioactive Materials Area”
    • Multiple hazards may be represented on the same sign with dose rate based information shown first followed by airborne based posting and then contamination based posting.
    • Contact HP (RP) Prior to Entry is required on all posing signs at the bottom
the atc rpt standard1
The ATC-RPT Standard
  • Radiological Buffers Zones (RBZ) have unique postings not addressed in the regulations.
  • Some power facilities use them, some do not. The DOE sites typically use either an RBZ or Radiological Buffer Area (RBA)
  • We will use the RBA prior to an individual entering an RCA.
the atc rpt standard2
The ATC-RPT Standard
  • Barriers are treated one of two ways:
    • An invisible plane that must not be broken
    • Wet paint theory – reaching across is okay – just don’t touch anything.
    • We will use the invisible plane theory
    • Do not break the plane created by the barrier or the tape on the floor.
  • Radioactive tape is also used specifically in applications concerning loose surface contamination. It defines the intersection of the plane with the floor
the atc rpt standard3
The ATC-RPT Standard
  • Areas with SOPs will have provision made for the barrier to be temporarily disconnected to permit access and egress. In this case, the barrier is to be approximately waist level.
  • Barriers at areas without SOPs are to be secured on both ends with the barrier rope at a height of five feet.
  • The ends of all rope barriers are to be secured using tie-wraps and a double overlap of the end.
the technique
The Technique

The “bitter end”

Trim off excess unraveled pieces

the technique1
The Technique

The first loop. About two inches between ty-wraps

the technique2
The Technique

The second loop.

Notice the two new tie-wraps are between the first two tie-wraps

the technique3
The Technique

Trim it up.

The tie-wraps as close as possible.

Up the side cutters to cut the excess rope as close as possible.

the atc rpt standard4
The ATC-RPT Standard
  • Any area with radiological readings > 80% of the threshold for the next level of posting should have the posting upgraded to the next level as a precaution. For example:
    • The general area dose rates in a posted High Radiation Area are found to be 800 mr/hr. The area should be upgraded to a LHRA.
    • The RPT would do this after consulting with an RP Supervisor.
scenario pjb
Scenario PJB
  • Your team is assigned to participate in a routine surveillance conducted in accordance with the station’s Compliance Observation Program (COP).
  • Each team is assigned specific postings to inspect.
  • Each team is given a current survey to use as the standard for the posting observation.
  • Each four man team will be sub-divided into two person sub-teams.
  • Standard radiological safety guidelines apply.
  • Industrial safety standards also apply. Adhere to all postings.
scenario pjb1
Scenario PJB
  • The task is to check the posting in place to ensure it matches the radiological conditions presented by the survey data.
  • Your RWP number is RWP-201X-243 task 4.
  • The team members are to adhere to all RWP requirements and posting.
  • The team members are to perform the task in a manner in which dose is equalized between the team members.
scenario pjb2
Scenario PJB
  • The teams are to adhere to the instructions given in the Student Guide.
  • Discrepancies are to be communicated to the Instructor and actions taken as directed.
  • Questions
instructions
Instructions
  • Timed
  • Follow the Student Guide as a procedure.
scenario set up
Scenario Set-Up
  • When using the side-cutters on the tie-wraps or the rope, use caution to avoid sharp edges and the pinch point.
  • Using the information and materials provided, construct and install a barrier and posting in accordance with the local guidance and regulatory requirements.
instructions1
Instructions
  • Follow the Student Guide as your procedure.
  • After finishing Section 2, complete the student guide as a team and return it to the Instructor.