RAE Honeywell in Partnership with BNC Scientific

1
RAE/Honeywell in Partnership with BNC Scientific

• GammaRAE II R Training

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QPlacing the device into operation

• A See manual pg. 9-12

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QPlacing the device into operation
4

• QSetting user adjustable features (what the
  setting features represent, i.e.,threshold
  setting and their effect on false alarm and
  sensitivity of device

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ASee manual pg. 24 and 25
6

• Q displays and alerts (monitoring system status
  and recognizing and understanding system
  notifications)
• ASee manual pg. 8

7

• QConducting basic operator maintenance (charging
  of batteries, etc)
• A See manual pg. 6

8

• QOverview of how alarm algorithm works and how
  the device sets and/or uses background including
  answers to following questions Is alarm
  threshold based on the detectors gross count rate
  or a derived quantity such as
• AThere are two modes Search Mode and Safety
  Mode. Search Mode alarm threshold (Background
  radiation level) (Search Alarm) x (standard
  deviation of background radiation level). Safety
  Mode sets Low or High absolute alarm threshold
  based on dose and dose rate.

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• Q Is alarm threshold based on the detectors
  gross count rate or a derived quantity such as
  exposure rate or an energy-dependent count rate?
• AThe alarm threshold is based on detector gross
  count rate and accumulated count.

10

• QWhat time period (i.e. integration time) that
  is used to assess whether or not radiation has
  exceeded threshold?
• A125ms

11

• Q How frequently is the threshold condition
  assessed?
• A1Hz

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• QIs the alarm fixed or does it vary with
  radiation background?
• ASafety Mode alarms (Low and High) are fixed
  based on dose and dose rate including background.
  Search Mode alarm varies with the background
  level.

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• QIf the threshold is fixed what are the
  threshold values?
• ASafety Mode alarms (Low and High) are
  programmable which can be set by users. Safety
  High default setting 200 µR/h range 0600R/h.
  Safety Low default setting 50 µR/h range
  0600 R/h. Dose High default setting 25 R
  range 0999.9R. Dose Low default setting 5R
  range 0999.9R.

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• QIf the threshold is variable, how high above
  background is the threshold set? If the
  difference is based on a formula should the
  formula be provided?
• AThere are two modes Search Mode and Safety
  Mode. Search Mode alarm threshold (Background
  radiation level) (Search Alarm) x (standard
  deviation of background radiation level). Search
  Alarm number is how many sigmas (standard
  deviation of stored background reading which was
  recorded after initial 36-second background
  reading countdown). Safety Mode sets Low or High
  absolute alarm threshold based on dose and dose
  rate. Search Alarm default setting 5.8 range
  19.9. Safety LOW and HIGH settings 0600mR/h.

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• QIf the threshold varies with the background,
  how frequently and for what duration is the
  background measured?
• AThe background was measured only when the
  instrument was initially turned on. However, at
  any time the background can be updated by users
  in Search Mode.

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• QIf the alarm decision is based on multiple
  variations, intermediate and multiple decisions
  (i.e., energy windowing, region of interest
  analysis, etc) how are the decisions processed
  and alarm decisions made?
• AAlarm decision is only based on dose or dose
  rate.