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radiation safety and shielding design > Class II Nuclear Facilities and Prescribed Equipment Regulations > Flashcards

Class II Nuclear Facilities and Prescribed Equipment Regulations Flashcards

1
Q

class II license applications

A

license to construct
license to operate
license to decommission

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2
Q

class II prescribed equipment license applications

A

general requirement

license to service

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3
Q

what is a class II nuclear facility?

A

facility that includes class II prescribed equipment

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4
Q

what is class II prescribed equipment?

A

-irradiator that uses more than 10^15 Bq of nuclear substance
-irradiator that requires shielding which is not part of irradiator and can deliver dose of raditation at > 1 Gy/min at 1 m distance
-radioactive source teletherapy machine
(d) a particle accelerator that is capable of producing nuclear energy and has a beam energy of less than 50 MeV for beams of particles with a mass equal to or
less than 4 atomic mass units;
(e) a particle accelerator that is capable of producing nuclear energy and has a beam energy of no more than 15 MeV per atomic mass unit for beams of particles
with a mass greater than 4 atomic mass units; or
(f) a brachytherapy remote afterloader

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5
Q

what is an irradiator?

A

device that is designed to contain a

nuclear substance and to deliver controlled doses of radiation from that substance to any target except persons

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6
Q

definition of teletherapy machine

A

device that delivers controlled doses of radiation for therapy

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7
Q 
what does license to construct class II facility include 
(in addition to info in section 3 of general nuclear safety and control regs)
A

-name and location
-evidence applicant owns site or has authority
-description of the class II equipment
-measures to control facility access and other safety features
-plans and drawings of facility
-purpose of adjacent areas and occupancy levels
-shielding materials and calcs
-location of voids in shielding (ducts etc)
-describe ventilation system
-QA program
-type and energy of radiation produced
-the anticipated maximum dose of radiation that may be received by any person as a result of the commissioning of and during the operation of the nuclear
facility
-the direction of the direct beam of any teletherapy machine to be encompassed by the licence and a description of the physical means that may be used to
limit the direction of that beam
-expected and max workloads during commissioning and operation
-# of hours/week equipment will be operators
-effects on environment and health due to activity
-responsibilities and qualifications requirements for workers
-program to inform persons living close by on effects on environment and health
-plan for decommissioning

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8
Q 
what does license to operate class II facility include 
(in addition to info in section 3 of general nuclear safety and control regs)
A

-name and location
-commissioning plan
-results of commissioning work
-evidence applicant is owner or has authority
-description of equipment
-proposed policies for operating and maintaining the facility
-policies for handloing, storing, and transporting nuclear and hazardous substances
-QA program
-type and energy of radiation to be produced
-the proposed measures to ensure that the type of beam producible by, and the maximum output energy, limits to the beam orientation and maximum radiation
dose rate of, the Class II prescribed equipment cannot be inadvertently altered
-method and results of measuring effectiveness of shielding
-description of portable radiation detection equipment
-methods for leak tests
-area radiation monitoring system
-max dose received by any person as result of commissioning
expected and max workloads
-# of hours per week machine will be operated (includes QA, research)
-procedures for surveys including location and frequency
-responsibilities and qualifications and training for workers
-plan for decommissioning

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9
Q 
what does license to decommission class II facility include 
(in addition to info in section 3 of general nuclear safety and control regs)
A
  • name and location
  • nature of and schedule for decommissioning
  • land, buildings etc affected by decommissioning
  • nature, quantity, and activity of nuc. at facility
  • nature and extent of contamination at facility, including dose rates
  • measures to control releases of radioactive and hazardous substances
  • max dose that may be received by any person as a result of the decommissioning
  • max quantities and concentrations of nuc and hazradous substances that may be released into environment
  • effects on environment, health, safety, and measures that will be taken to mitigate these
  • responsibilities and qualifications of workers
  • description of planned state of site upon finishing the decommissioning
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10
Q 
at does license to service class II facility include 
(in addition to info in section 3 of general nuclear safety and control regs)
A
  • name, model number of equipment, or certificate relating to the equipment
  • describe nature of servicing
  • methods for the servicing
  • qualification and training of workers
  • procedures to be followed after completion of servicing to confirm equipment is safe to use
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11
Q

class II exemptions fom license requirements

A 
-prepare a site for class II nuc facility
construct, operate, modify, decommission or abandon a class II facility that includes a geo-physical logging particle accelerator
-deommision a class II that includes brachy remote afterloader
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12
Q

can someone possess, transfer, or produce class II equipment that doesn’t include nuclear substance without license?

A

yes

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13
Q

what is certification requirement for class II prescribe equipment

A

No person shall use Class II prescribed equipment
unless
(a) it is a certified model; or
(b) it is used in accordance with a licence that authorizes its use for development purposes or for scientific
research that is not conducted on humans.

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14
Q

what is included on application for certification of class II prescribed equipment?

A

-name and address
-name and address of manufacturer of equipment
-brand name and model # of equipment
-design of equipment and its components
-intended use of equipment
-name, quantity (Bq) and form of nuc substance
-method of incorporating nuc substance in equipment
-expected radiation dose rates around equipment in all modes of operation, and methods, calcs, measurements used to establish them
-max radiation dose rate that equipment can deliver
-how to use, transport, and store equipment
-how to conduct leak tests on equipment
-how to deal with accidents involving equipment
-describe labelling of equipment
-QA program that was followed during design and that will be followed during production
-the type of package for and the procedures for packaging and transporting any equipment that may contain a nuclear substance, including the emergency
response plan to be followed in case of a transportation accident involving the equipment
-inspection and servicing program
-the type of beam producible by, and the maximum output energy and limits to the beam orientation of, any particle accelerator or radioactive source teletherapy machine
-max photon and neutron leakage
-1/2 lives of activated components of any accelerator and the radiation dose at 30 cm from those components

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15
Q

how much notice does the commission have to give to refuse to certify or de-certify?

A

30 days before de-certification

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16
Q

radiation protection requirements for class II nuc facilities apply for what facilities?

A

all class II nuc facilities other than facilities that include brachy remote afterloaders that incorporate pure beta emitters as their only nuclear substances, or facilities that include particle accelerators for geo-physical logging

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17
Q

radiation protection requirements for entrance door to room with class II equipment

A
  • door interlock
  • LPO button
  • designed so that somebody cannot be locked inside room
18
Q

radiation protection requirements for entrance (other than door) to room with class II equipment

A
  • again “door” interlock

- LPO

19
Q

radiation protection requirements for room with class II equipment

A
  • viewing system
  • entrance has beam on/off signs
  • area radiation monitoring system - independent of class II equipment, produces alarm when someone enters room and equipment is delivering dose, has independent back-up power supply
  • has an audible alarm that goes off before irradiation beings, to give person inside room time to push e-stop
  • e-stops, e-stops that have to be reset from inside room
  • at entrance, sign indicating name of 24/7 emergency contact
  • key-switch or code-operated
  • after device is serviced, device must be tested before use
20
Q

rules about e-stops

A

-unobstructed, accessible
-located AT LEAST at
-control console
near each entrance
-on both sides of class II equipment or on wall on both sides of equipment
-not in direct beam of machine

21
Q

what rules for class II equipment don’t apply to particle accelerators?

A
  • door interlocks, LPO, and person can’t be locked inside
  • audible alarm before irradiation starts
  • e-stops near each entrance and on both sides of equipment

don’t apply if accelerator meets at least one of following criteria:

  • its radiation dose rate at 30 cm is not greater than 200 µSv per hour when it is being operated in the manner that produces the maximum dose rate as limited either by its characteristics or by its interlocks, and it is located in a room that is equipped with a lock and that can be unlocked and entered only by persons who have been authorized by the licensee
  • its radiation dose rate at 30 cm is not greater than 25 µSv per hour when it is being operated in the manner that produces the maximum dose rate as limited either by its characteristics or by its interlocks.
22
Q

what rules for class II equipment don’t apply to brachy afterloaders?

A
  • LPO button
  • e-stops near room entrance

don’t apply if afterloaders contain nuc substance that, if exposed, would produce radiation dose rate in air < 10 mGy/h at 1 m

23
Q

can anyone be appointed RSO?

A

No, must have been certified by commission or is a designated officer

24
Q

when must RSO be appointed?

A
  • operate class II

- service class II

25
Q

what does application for certification as RSO include?

A
  • name
  • record of education, training, experience
  • statement from licensee that person is capable
  • class II equipment in respect of which the person may be certified

-person must complete a certification exam that is recognized by the commission

26
Q

how long is RSO certificate valid for?

A

-period in which person is employed by licensee as RSO

27
Q

how much notice does the commission give wrt refusing to certify a person or decertifying a person?

A

30 days, with description as to why

28
Q

what about during the RSO’s absence?

A
  • every licensee will designate a temporary replacement in writing
  • can replace them for no more than 60 days in 365 day period
29
Q

when is class II prescribed facility exempt from appointing an RSO?

A

-if someone has duties similar to RSO and is certified under class I nuc facilities

30
Q

what must someone do when they enter a room with an irradiator with mnor than 10^15 Bq of nuc?

A
  • ensure survey meter works

- ensure room is safe by using survey meter

31
Q

requirements for brachy remote afterloaders

A

-survey patients after treatment

  • ensure brachy room has:
  • remote alarm to detect and warn of interruption in treatment if control panel area is not continuously occupied
  • shielded container to hold radioactive sources in an emergency
  • remote handling tools required to recover source in an emergency
32
Q

requirements for installing sealed sources

A
  • measure dose rate when equipment is not in irradiation mode and notify commission if dose rate in any location that is 1 m from any sealed source in its shielded position exceeds the manufacturer’s specs
  • for teletherapy machine, measure radiation dose at all accessible locations outside the room with the machine in irradiation mode and at max dose rate at each location
33
Q

requirements for radiation survey meters

A
  • calibrated within 12 months
  • can measure gamma, x-ray and neutrons if applicable
  • indicates if battery power level is sufficient
34
Q

for what activity sealed sources are leak tests required?

A

50 Mbq or more

-must be able to detect 200 Bq or less

35
Q

when must leak tests on sealed sources of > 50 MBq be performed?

A
  • immediately before using a sealed source that has been stored for > 12 months
  • if sealed source is being stored, every 24 months
  • after an event that may have damaged the sealed source
  • every 12 months f sealed source is inside class II equipment
  • every 6 months if sealed source not inside class II equipment
36
Q

what does a licensee do if the leak test shows results > 200 Bq

A
  • discontinue use of sealed source
  • discontinue use of class II prescribed equipment in which the sealed source or shielding is located or may have been located
  • limit spread of radioactive contamination from sealed source
  • notify commission that leakage was detected
37
Q

do leak tests have to be performed for a sealed source underwater with a device that can detect water-borne contamination < 200 Bq?

A

No

38
Q

how long does licensee keep record of radiation measurements required by the license?

A

-3 years after revocation or expiry of license

39
Q

what records must be kept for class II prescribed equipment?

A
  • daily output
  • training received by each worker
  • inspection, servicing etc required by Act
  • transfer of equipment
  • date of transfer
  • license number of person to whom equipment was transferred
  • model and serial number of equipment being transferred
  • leak test results
  • dose rate measurement results
40
Q

what records must someone who services class II equipment keep?

A
  • name and address of client for whome servicing was performed
  • license number of client for whom servicing was performed
  • brand name, model number, serial number of equipment
  • summary of work and date when servicing was done

radiation safety and shielding design (16 decks)

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