Rad monitors Flashcards
What causes the blue alarm beacon?
No sample flow
No radiation detected
Too much radiation detected
What causes a red alarm beacon?
High radiation in effluent stack
Sample flow too high or too low
What’s the purpose of ARMs?
Monitor and record the gamma radiation levels in various areas throughout the plant so that personnel are not inadvertently exposed to high radiation doses
How many ARMs do we have?
50
How many drywell and CTMT high range ARMs do we have?
where are they?
what type of detector is this?
4
2 in Drywell, 2 in Containment
Ion Chamber
What are the process Rad monitors and where are their locations?
CTMT and DW vent 166’ Area 8
FHA/Fuel Pool Sweep 245’ Area 9
Turbine building vent 166’ Area 4
Radwaste ventilation RW 136’
SBGT A/B 245’ Area 9
What are the process liquid rad monitors and where are they located?
PSW 93’ area 9
SSW A/B 93’ Area 9 - A, Area 10 - B
CCW 119’ Area 9
What’s the purpose of process rad monitoring?
Initiate appropriate protective action to limit release of radioactive materials from reactor vessel, primary and secondary CTMT, if predetermined levels are exceeded in major effluent streams.
Which SBGT sample pump is always running?
B
What causes offgas post treatment rad monitor to trip?
What valve closes when this happens?
2 upscale Hi Hi Hi trips
2 downscale trips
1 downscale and 1 Hi Hi Hi trip
Closed N64-F060 which also closes the N64-F023, F034A/B, F054
What will cause radwaste effluent rad monitor to trip?
What valve isolates?
Hi Hi rads
Monitor downscale
Monitor inop
G17-F355
What could high rad level in the offgas post treat rad monitor be a sign of?
Early indication of catastrophic fuel failure
