Radiation Protection Technology

Contamination Control

Radiological Safety and ResponseRPT-243-PE-5

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Learning OutcomesUpon completion of this lesson, the student will be able to (cont’d):

• Demonstrate the ability to perform a radiological survey including:– Pre-survey preparations– Operational checks on survey instruments– General area radiation and contamination

surveys– Work area radiation and contamination surveys– Counting loose surface contamination surveys

using a GM frisking instrument converting cpm to dpm/100 cm2 and dpm/LAS

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Learning OutcomesUpon completion of this lesson, the student will be able to (cont’d):

• Demonstrate the ability to perform a radiological survey including:– Surveying items for contamination with a GM

frisking instrument– Documenting the results– Recommendations of posting adjustments based

on the results

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Learning OutcomesUpon completion of this lesson, the student will be able to (cont’d):

• Demonstrate acceptable behaviors when in and upon exiting a contamination area, including:– Proper wearing and removal of appropriate

contamination control clothing– Proper contamination control techniques that

minimize cross contamination– Proper use of the step-off pad for exiting and for

removal of material• Demonstrate the proper use of personnel dosimetry

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Outline

• Explanation• Mini-Lecture Dress-Out and Bagging Techniques• Section 1 – Contaminated Area Entry and Survey• Section 2 – Investigation for Contamination Control

Problems

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Explanation

• The same team assignments made in PE-1 will continue into this PE.

• This PE has two sections. – The first section involves the teams entering a

contaminated area and performing a contamination survey.

– The second section involves the teams visually inspection an area to determine contamination control problems.

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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 PC use and bagging techniques for contamination control.

• A short briefing for the scenario.• At the conclusion of the practical portion, a team

debrief may be held if time permits.

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PC Techniques

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In General…

• Each station issues procedures that describe the details of their personal protective clothing standards.

• Other techniques may be stipulated through training, department policy or “standing orders” such as: – When disposable PCs are required or – Alternate dressing and undressing techniques

developed locally– The use of tape vs. launderable items

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The ATC-RPT Standard

• For the purposes of our PEs, the PC standards that will be used are shown in the following pictures and as described here:– Unless specifically directed, joints are not taped– The wet paint technique is observed for SOP

barrier ropes and tape– All items leaving a posted contaminated area

must be surveyed clean or bagged – except an individual’s EAD.

– Cuff all bags for transferring at SOPs.

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The ATC-RPT Standard

• For the purposes of our PEs, the PC standards that will be used are shown in the following pictures and as described here:– The EAD is to be worn in a whirl pack in the chest

pocket of the PC coveralls– The TLD and security badge are worn under the

coveralls but within one hand’s breadth of the EAD.

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The ATC-RPT Standard

• For the purposes of our PEs, the PC standards that will be used are shown in the following pictures and as described here:– Upon exiting the Contaminated Area:

• Before removing the gloves, squeeze the EAD out of the whirl-pack onto the edge of the SOP

• Upon stepping on the SOP, place the EAD on the lanyard with the TLD

• Frisk the combo when a hand, foot, and face frisk is done

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The ATC-RPT Standard

• Portable instrumentation taken into posted Contaminated Areas shall be wrapped or bagged in clear plastic to prevent cross contamination.

• The Instrument wrapping may be wiped with a Maslin upon removal from the CA.

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Overlap Joints

Use tape only as directed by the Instructor

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Dosimetry

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Dosimetry

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Transfer Across Boundary

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Cuff the Bag

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Extend Across the Boundary Tape

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Place Item into the Bag From Inside the Area

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Close the Bag

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Close the Bag

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Protect the Instruments

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Section 1Contaminated Area Entry and Survey

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Instructions

• Timed• Follow the Student Guide as a procedure.

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Section 2Investigate Low Level Shoe

Contaminations

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Instructions

• Follow the Student Guide as your instruction.

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Section 3Frisk, Complete Documentation

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Instructions

• Follow the directions in the Student Guide

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What Are Your Questions ?