Presentation on theme: "Radiation Protection Technology Posting Radiological Safety and Response RPT-243-PE-4."— Presentation transcript:
Radiation Protection Technology Posting Radiological Safety and Response RPT-243-PE-4
Radiation Protection Technology Learning Outcomes Upon 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.
Radiation Protection Technology Outline Explanation Mini-Lecture and Demo for Posting Techniques Section 1 – COP Surveillance Section 2 – Posting Construction and Placement Debrief
Radiation Protection Technology 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.
Radiation Protection Technology 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.
Radiation Protection Technology 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.
Radiation Protection Technology 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.
Radiation Protection Technology 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.
Radiation Protection Technology 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.
Radiation Protection Technology 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
Radiation Protection Technology Multiple Areas
Radiation Protection Technology 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 Standard
Radiation Protection Technology RBA
Radiation Protection Technology 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 Standard
Radiation Protection Technology The Invisible Plane
Radiation Protection Technology Tape
Radiation Protection Technology 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 ATC-RPT Standard
Radiation Protection Technology Securing the Ends
Radiation Protection Technology The Technique The “bitter end” Trim off excess unraveled pieces
Radiation Protection Technology The Technique The first loop. About two inches between ty-wraps
Radiation Protection Technology The Technique The second loop. Notice the two new tie-wraps are between the first two tie-wraps
Radiation Protection Technology 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.
Radiation Protection Technology The Technique Completed
Radiation Protection Technology 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.
Radiation Protection Technology 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.
Radiation Protection Technology 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.
Radiation Protection Technology 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
Radiation Protection Technology Instructions Timed Follow the Student Guide as a procedure.
Radiation Protection Technology Section 2 Posting Construction and Placement
Radiation Protection Technology 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.
Radiation Protection Technology 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.
Radiation Protection Technology What Are Your Questions ?