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64 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Define radiation |
Energy emitted from a radioactive source |
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When is neutron radiation encountered? Why is it not a major concern? |
Only during reactor operations |
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What type of radiation does causes nearly all exposure to naval nuc power personnel? |
Gamma |
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Define REM (roentgen equivalent man) |
Term used to express biological dose from radiation |
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Effect of naval nuclear work on environment and personnel nearby |
No significant effect |
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Risk of personnel to radiation exposure within normal limits |
Risk is small when compared to hazards of normal life |
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Main potential Heath effect associated with radiation |
Cancer |
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Risk to future generations from radiation exposure within normal limits |
Small.effects have not been observed in humans. Study from 70000 atomic bomb survivors did not show any genetic effects. |
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Radiation exposure to unborn child within accepted limits |
Risk is small when compared to other risks |
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Navsea limit for whole body penetrating radiation |
3 rem (3000 mrem) per quarter not to exceed 5 rem (5000mrem) per year. |
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Navsea limit for pregnant women |
Not to exceed 500 mill item per the entire length of pregnancy |
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Why are local exposure control levels established |
Maintain personnel radiation exposure as low as reasonably achievable (ALARA) |
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State your local exposure control level |
500 mrem per year or less |
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Level for pregnant women |
No more than 50 mrem per month |
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How are changes approved to your local exposure control level |
They are approved in writing administratively |
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Who cAn approved changes to your local exposure control level? |
Changes up to 2000 mrem must be approved by director of radcon. Anything above 2000 is navsea approval |
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What is avoidable radiation exposure |
Exposure that could have been prevented or reduced by change in job preparation or process |
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What are some causes golf avoidable radiation exposure |
Loitering in rad areas, poor work practices, incorrect TWD, incorrect material or staging |
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Discuss your responsibility to report avoidable radiation |
Contact supervisor or rad con personnel and fill out an RDR radiological deficiency report |
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Why is it necessary to report conditions that affect your qualifications to receive radiation exposure |
To make sure you are healthy and do not receive radiation that could put you at risk |
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Why do we keep track of radiation exposure |
To avoid exceeding your radiation exposure control level and limits |
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Where can you obtain your year to date exposure info |
Exposure record card (ERC) Supervisor Rad on personnel Rad health officer |
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What is dose rate |
Amount of radiation received by a person per amount of time |
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What is dose |
The total amount of radiation received by a person |
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When is a TLD required to be worn |
Radiation areas High rad areas Radiologically controlled areas Propulsion plant machinery spaces during reactor ops |
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How do you obtain a TLD |
Issued by radcon at dosimetry issue stations |
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What do you check on your TLD |
No damage (case, lanyard, Mylar window) Case snapped closed Information Is correct and serial # matches the one in ERC card |
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How do you wear a TLD |
Clip TLD to your shirt and attach lanyard to button hole or neck lanyard. Should be laying flat with Mylar window facing out |
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Where do you where TLD when monitoring full body exposure |
Chest |
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What does PD stand for |
Pocket dosimeter |
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What does TLD stand for |
Thermoluminescent dosimeter |
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When do you where a PD |
Entering high rad area Handling material with rad levels greater or equal to 100 mrem per hour |
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Issues to check upon PD issue |
No damage Calibration date not expired Display indicates 0.0 mrem No icon in left side of display |
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How do you wear and attach PD to your body |
Within 3 in of TLD attaches to shirt then clip rod lanyard to shirt or lanyard |
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When are you required to read your PD |
Prior to entering HRA to ensure it is zeroed When inside hra to be sure you do not exceed 150 mrem Upon exit of hra |
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You must exit the HRA when.. |
Less than 20 mrem remains before exceeding your allowed exposure based on PD readings
When your rod reads 150 mrem |
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When wearing an EPD what do you do for issues like low batter, epd screen malfunction, high or low expected readings a reading of 150 |
WIN Warn others Immediately exit area Notify radcon |
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What do you do if you lose or are separated from epd |
Immediately exit and notify radcon |
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When are TLDs turned in |
Sum of epd reading is greater than 100 Less than 20 mrem of allowable exposure left Exposure control level extended to 1500
Completion of job requiring multiple dosimeters |
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How do you round your EPD reading |
To nearest whole number (2.6 would be 3) |
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How do you return PD |
Record new reading on ERC then return to point of issues |
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Multiple dosimeter TEIR 1 |
<30 mR/hr >30 mR/hr with no gradients Where on chest |
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Radiation level TIER 2 |
>30 mR/hr and <100 mR/hr where gradient fields exist |
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Radiation level TEIR 3 |
>100 mR/hr where gradient fields exist |
Radiation |
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What are some potential sources of radiation associated with radiological work |
Operating reactors, primary coolant, solid/liquid radioactive waste, radioactive support equipment such as collection bottles and tanks, vacuums |
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3 methods to minimize exposure |
TDS Reduce TIME Increase Distance Utilize SHIELDING with radioactive source |
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Work practices to minimize time spent in radioactive area |
Plan the job, Mock up training, Pre job brief Stage tools |
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How can you increase your distance from the source of radiation |
Move the component to be worked Use remote equipment Adjust work position at site Move to area with lower rad levels |
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Can you move shielding ? |
No not without specific authorization from radcon |
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How can you utilize shielding |
Work behind concrete blocks/structural components
Request temporary lead shielding |
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What does the frisker alarm at |
450 picocurries |
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How far do you keep the frisker from your body |
1/2 inch |
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What should you check for before using frisker |
Know I’m X1 position and you hear audible clicks. If using the electronic one make sure no error code E and you hear clicks |
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At what rate do you move frisker along body |
2 inches per second |
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Why is the audible noise more preferred as oppose to watching the meter |
You will her clicks before you see the meter change |
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If you hear increased counts over an area what do you do |
Slowly go over it again |
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If the frisker alarms? |
Tell control point watch |
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Define RAM |
Any equipment, parts or materials that have potentially been exposed to betta-gamma contamination or neautron flux from reactor |
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How do you mark ram |
Ram tag with radiation symbol . Yellow magenta tape or yellow plastic coating or in a j sealed yellow bag |
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What are the requirements for accountability of ram |
Tagged with serial number, Location Transported by designated controllers |
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What is contamination |
Small particles of radioactive material |
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What’s the difference between radiation and contamination |
Radiation can not be on or in and be spread |
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Loose contamination spec |
Not be more than 450 picocurries per 100 cm2 which represents approximately 4 by 4 inches |
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4 methods of personal Decon |
Tape presses Waterless hand cleaner Mild soap and water Damp wipes |
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