CAMS (D11)

Question 1

For the CAMS Fission Product Monitors, what type of detectors are used and what do they monitor?

Answer 1

Iodine & air particulate - scintillation detectors

Noble Gases - Geiger-Mueller detector

Question 2

What signals will cause the Fission Product Monitoring/H2O2 sample lines to isolate?

Answer 2

3” RWL
1.85 psig in the Drywell
Rx Bldg Exhaust rads 18 mr/hr
RF Exhaust rads 18 mr/hr
- K634 - U2 6.9 mr/hr
- K635 - U2 5.7 mr/hr

Question 3

What DW Radiation Level causes all primary containment 18” purge and vent valves to close? Which valves will close? How do you verify in the MCR that these valves received a high rad signal?

Answer 3

138R/hr

- Drywell purge 
T48-F307 & F308
- Torus purge
T48-F309 & F324
- Drywell vent
T48-F319 & F320
- Torus vent
T48-F318 & F326

Amber light above valve indicators on H11-P602 panel

Question 4

How you do override the LOCA isolation for the H2O2 analyzers?

Answer 4

On H11-P700 panel, there are two isolation bypass keylock switches.

Taking BOTH switches to the BYPASS Position causes the following:

• Inboard and Outboard valves to open
• Sample pump AUTO starts
• System AUTO switches to ANALYZE mode of operation

Question 5

What is the time requirement for placing the H2O2 analyzers in operation prior to getting stable readings? When are readings required?

Answer 5

Per 34SV-SUV-019 “Surveillance Checks” weekly checks

80 mins prior to reading

Required:

• 34SV-SUV-019 “Surveillance Checks” WEEKLY
• Anytime Primary Containment Control PC flowchart is entered

Question 6

If DW pressure rises to 1.95psig, which T.S.(s) are entered? What about if all annunciators for Fission Product Monitoring are lost at the same time?

Answer 6

• 3.6.1.4 – restore DW pressure within 1 hour
• If pressure rise is due to a leak, 3.4.4 – RCS Operational Leakage
• If due to a problem with leakage detection – 3.4.5

If ALL Annunciators for FP Monitor not working –
Lost all detection - 3.4.5 D.1 - Enter 3.0.3 immediately