Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

radiation safety and shielding design > Nuclear substances and radiation devices regulations > Flashcards

Nuclear substances and radiation devices regulations Flashcards

1
Q

bulk quantity

A

> 1 tonne

>1 tonne per year per nuclear facility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

conditional clearance level

A

activity concentration that does not result in effective dose
> 1 mSv in a year due to a lower probability event referred to in IAEA safety standard
or > 10 uSv in a year

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

depleted uranium

A

uranium that contains uranium 235 in a concentration that is less than that normally found in nature (i.e. natural uranium)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

exemption quantity

A
  • activity concentration is set out in column 2 (if uniform and not in bulk) or column 3 of schedule 1, or else
  • 10 Bq/g if Z < 81 and substance is uniformly distributed and not in bulk quantity
  • 10,000 Bq if Z<81 and in bulk
  • 10 Bq/g if Z > 81 but substance or progeny do not emit alpha radiation, and substance is not in bulk
  • 10,000 Mq if Z > 81 but substance or progeny does not emit alpha radiation, and substance is in bulk
  • 1 Bq/g if Z > 81 and substance or progeny emits alpha and item not in bulk
  • 1000 Bq if Z > 81 and substsnce or progency emits alpha and item in bulk

(c) in respect of more than one radioactive nuclear
substance,
(i) if the radioactive nuclear substances are uniformly distributed in material and not in bulk
quantity, the quotient obtained by dividing the total
activity concentration by the sum of quotients obtained by dividing the activity concentration of each
radioactive nuclear substance by its corresponding
exemption quantity as referred to above, or
(ii) the quotient obtained by dividing the total activity by the corresponding sum of quotients obtained by dividing the activity of each radioactive
nuclear substance by its corresponding exemption
quantity as referred to above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

exposure device

A

device for gamma radiography

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

IAEA safety standard RS-G-1.7

A

Application

of the Concepts of Exclusion, Exemption and Clearance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

nuclear criticality

A

self-sustaining chain reaction of nuclear fission

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

radiation device

A

(a) a device that contains more than the exemption
quantity of a nuclear substance and that enables the
nuclear substance to be used for its radiation properties; and
(b) a device that contains a radium luminous compound.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

specific activity

A

activity per unit mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

unconditional clearance level

A
  • for a material that is uniformly distributed (except for surface contaminated material):
  • activity concentration set out in column 2 of schedule 2 or else
  • 1 Bq/g if Z < 81
  • 1 Bq/g if Z > 81 but substance or its progeny does not emit alphas
  • 0.1 Bq/g if Z > 81 and substance or its progeny emits alphas

or
in respect of more than one radioactive nuclear
substance — except for Thorium 232, Uranium 235,
Uranium 238 and their radioactive progeny mentioned
in paragraph 4.3 of the IAEA Safety Standard RS-G-1.7
— is the quotient obtained by dividing the total activity
concentration by the sum of quotients obtained by dividing the activity concentration of each radioactive
nuclear substance by its corresponding activity concentration as referred to above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what does this reg apply to?

A
  • all nuclear substances and sealed sources, as well as radiation devices that are not included in class II prescribed equipment
  • does not apply to packaging or transport
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what should license include (in addition to info required by general nuclear safety and control regulations)

A
  • methods for activity
  • how will release of radioactivity be monitored
  • how will dose rate be detected and recorded
  • how will contamination spread be limited
  • how will a person, site or equipment be decontaminated
  • location of activity
  • roles, qualifications of workers
  • training for workers
  • instructions for dealing with accidents that involve the nuclear substance
  • inspection program
  • how will radiation surveys meters be calibrated
  • how will dosimeters be calibrated and verified
  • how will leak tests and surveys be conducted
  • design of the room if unsealed source
  • brand name and model number if nuc substance is contained in a radiation device
  • procedure for disposal of device or return to manufacturer
  • if category I, II, or III material, the measures to prevent nuclear criticality, and info required by nuclear safety regulations as applicable
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is on application to service radiation device (in addition to info required by general nuclear safety and control regulations)

A
  • brand name and model # of device
  • description of servicing
  • methods for servicing
  • qualifications and training of workers
  • procedures after servicing to confirm device is safe
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

when is someone exempt from a license?

A
  • can handle nuc if activity concentration does not exceed exemption quantity, conditional clearance level, or unconditional clearance level
  • handle sealed source if it contains less than exemption quantity
  • handle radiation device if quantify of nuclear substance < 10 X exemption quantity
  • handle deuterium if < 10 kg/year
  • handle depleted uranium that is used as counterweight in aircrafts if it is labelled, labelled unauthorized, no alterations or treatment is done
  • handle depleted uranium, natural uranium, natural thorium if < 10 kg/year and not used for radiation properties
  • handle includes import/export, trasfer, store, use, abandon
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

where do the exemptions not apply?

A

category I, II or III substances

import/export of nuc where nuclear non-proliferation import and export control regulations apply

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

where can someone abandon or dispose without a license?

A

if activity doesn’t exceed

  • exemption quantity
  • conditional clearance level
  • unconditional clearance level

does’t apply to category I,II or III or its discharges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what are radioactive substances that someone can use, transfer, possess, abandon without a license as long as requirements are met?

A
  • smoke detectors
  • tritium safety signs
  • devices with radium luminous compounds
  • check sources
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

limit activity of a check source that can be used without a license

A

i) < 370 kBq, and substenace and its progeny don’t emit alphas
ii) < 3.7 kBq if Z > 81 and substance or progency emit alphas
- does rate doesn’t exceed 1 uSv/h at 0.1 m

-the radioactive nuclear substance in the check
source, when it is mounted in its holder, conforms to
International Standard 2919, Radiation Protection —
Sealed radioactive sources — General requirements
and classification (1999), of the International Organization for Standardization
- the check source, if it is a sealed source, meets the
tests specified in ANSI/HPS N43.6-1997, Sealed Radioactive Sources — Classification, of the American
National Standards Institute/Health Physics Society

  • all markings and labels are legible
  • design prevents people from making direct contact with nuc materials
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

can we use a radiation device that isn;t certified?

A

No, unless license allows its use for development

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what must be included on application to certify a device?

A
  • name and address
  • name and address of manufacturer
  • brand name and model
  • design and use of device
  • name and quantity of nuc in device
  • how is nuc incorporated
  • expected radiation around the device in all modes of operation
  • instructions for use, transportation, and service
  • instructions for leak tests
  • instructions for dealing with accidents
  • describe the labelling
  • QA followed during design and that will be followed during production
  • reommended inspection and servicing
21
Q

when do the requirements for leak tests apply?

A

> 50 MBq source

doesn’t apply to gaseous sources, used or stored underwater with a device that detects water-borne contamination

22
Q

when must leak tests be applied?

A
  • before using source after it was stored for 12 or more months
  • if it being stored, then every 24 months
  • immediately after an event that may have damaged the source
  • if source is in a radiation device, every 12 months
  • if source is not in radiation device, every 6 months
23
Q

what must one be able to detect with leak test

A

200 Bq or less

24
Q

requirements on application to certify some as exposure device operator

A
  • name and business address
  • training and experience
  • finished exam recognized by commission
25
Q

obligations of licensees regarding exposure devices

A
  • must have steel or brass tag affixed with name of nuc, quantity, date, form of nuc
  • lock exposure device
  • return the dosimeter used for the person exposed, with 10 days after the period specified
26
Q

when does licensee of exposure device have to contact commission?

A
  • device is stolen, damaged
  • dose rate > 2 mSv/h when sealed source assembly is in shielded position
  • sealed source fails to return to shielded position
  • sealed source is separated from exposure device when latter is not being serviced
27
Q

when do the requirements for leak tests apply?

A

> 50 MBq source

doesn’t apply to gaseous sources, used or stored underwater with a device that detects water-borne contamination

28
Q

when must leak tests be applied?

A
  • before using source after it was stored for 12 or more months
  • if it being stored, then every 24 months
  • immediately after an event that may have damaged the source
  • if source is in a radiation device, every 12 months
  • if source is not in radiation device, every 6 months
29
Q

what must one be able to detect with leak test

A

200 Bq or less

30
Q

requirements on application to certify some as exposure device operator

A
  • name and business address
  • training and experience
  • finished exam recognized by commission
31
Q

obligations of licensees regarding exposure devices

A
  • must have steel or brass tag affixed with name of nuc, quantity, date, form of nuc
  • lock exposure device
32
Q

when does licensee of exposure device have to contact commission?

A
  • device is stolen, damaged
  • dose rate > 2 mSv/h when sealed source assembly is in shielded position
  • sealed source fails to return to shielded position
  • sealed source is separated from exposure device when latter is not being serviced
33
Q

column 2 vs 3

A

schedule 1

column 2 of exemption quantities- substance is uniformly distributed in a material and not in bulk quantity
column 3 of exemption quantities- substance is in bulk quantity

column 3 > column 1 by 1000-10^7

column 2 of unconditional clearance level (schedule 2) is separate

column 2 in schedule 2 can be smaller or larger than column 2 in schedule 1

34
Q

when must leak tests be applied?

A
  • before using source after it was stored for 12 or more months
  • if it being stored, then every 24 months
  • immediately after an event that may have damaged the source
  • if source is in a radiation device, every 12 months
  • if source is not in radiation device, every 6 months
35
Q

what must one be able to detect with leak test

A

200 Bq or less

36
Q

requirements on application to certify some as exposure device operator

A
  • name and business address
  • training and experience
  • finished exam recognized by commission
37
Q

obligations of licensees regarding exposure devices

A
  • must have steel or brass tag affixed with name of nuc, quantity, date, form of nuc
  • lock exposure device
  • return the dosimeter used for the person exposed, with 10 days after the period specified (15 days usually)
38
Q

when does licensee of exposure device have to contact commission?

A
  • device is stolen, damaged
  • dose rate > 2 mSv/h when sealed source assembly is in shielded position
  • sealed source fails to return to shielded position
  • sealed source is separated from exposure device when latter is not being serviced
  • spill of unsealed nuc in column 1 that ptoduced > 100 times the activity set out in column 3, or of a nuc not in column 1

-file report within 21 days

39
Q

what must licensee provide operator with for exposure device?

A
  • survey meter 20uSv- 100 mSv/h, capable of saying it needs batteries
  • material that can attenuate x100 if an external sealed source assembly guide tube is to be used
  • tongs to handle assembly and tools that can sever tube from exposure device
  • body dosimeter calibrated within last 12 months, within 20 % accuracy of true reading (this is the dosimeter that is returned after 15 days)
  • body dosimeter must emit alarm when dose rate reaches 5 mSv/h or total radiation exceeds 2 mSv
  • signs with radiation warning symbol
  • operator has obligation to follow these regs
40
Q

what must licensee limit dose of radiation received by another person (unless NEW) to as a result of possession or use of an exposure device?

A
  1. 1 mSv/week

0. 5 mSv/yr

41
Q

for what dose rate must the operator place people or erect barriers to prevent entry into the area for an exposure device?

A

0.1 mSv/h

42
Q

tracer studies

A
  • if > 2 GBq, must notify commission within 60 days of:
  • study date/location
  • name, quantity of nuc used
  • name of person for whom estudy was conducted
  • names of workers who handlded nucs and bioassay results for them
  • any unusual event
  • how unused nucs were disposed
  • specific activity of nuc upon entering and leaving system studied
43
Q

what record does soemone who services radiation devices have to keep for each service rendered?

A
  • name and address of client
  • licence number of client
  • brand name, model number, and serial number of device
  • name, quantity, and date of nuc
  • summary of work and day it was done
44
Q

what must be included on incident report to commission?

A
  • describe event
  • probable cause
  • nuc brand name, model etc
  • date, time, location of event, or best estimate
  • what licensee is doing to establish normal operations and prevent recurrence
  • if situation involved an exposure device, qualifications of workers involed
  • effective dose and equivalent dose received by any person
  • effects on environment, health, safety…
45
Q

column 2 vs 3

A

schedule 1

column 2 of exemption quantities- substance is uniformly distributed in a mterial and not in bulk quantity
column 3 of exemption quantities- substance is in bulk quantity

column 2 of unconditional clearance level (schedule 2) is separate

46
Q

what does exemption mean? vs clearance level?

A

radiation sources that never enter the regulatory control regime = exemption

radiation sources which are released from regulatory control = clearance

47
Q

what does unconditional clearance level mean

A

-clearance levels that apply to solid materials irrespective of the use to which those materials are put or their destination after control has been relinquished

48
Q

what does conditional clearance level mean?

A

-clearance is conditional on material being used in way specified or being sent to prescribed destination after release

radiation safety and shielding design (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions