40AO-9ZZ02 Excessive RCS Leakage Flashcards
What are the major actions for RCS Leak
- Start all CH pumps
- Isolate LD
- Trip the Rx
What alarms require an isolation of LD
If ALL following alarms
- RHX high temp
- LD line low press
- LD Rad monitor low flow
If LD leak is indicated in Aux Bldg, how long do you have to isolate
10 Min TCA
prevents spread of contamination
How long do you have to determine RCS leak rate after RU-1 Alarm
1 Hour
What are the major actions for a leak on disch. of CH pumps
- Isolate LD
- Stop all CH pumps
- Perform 40AO-9ZZ05 loss of CH or LD
- Align alternate disch. path
When aligning CH pump alternate disch. path what is the preferred lineup and why
A HPSI cold leg preferred
B HPSI Hot leg causes larger thermal stress
What is made inoperable when alternate CH discharge path is aligned
HPSI path used is inoperable
What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge
Cold Leg injection path >1525 psig
vlvs may not open with high DP
What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge
Cold Leg injection path >1525 psig
vlvs may not open with high DP
with SIT in-leakage when do the SIT’s become inoperable
- > 625 psig
- > 72% NR level
- <2300 ppm boron
What are the major actions for PZR safety vlv leakage
- Ensure BOTH Pzr fans are running
- Lower Prcs to just above 2160 psia
- Monitor for further leakage
How long do you have to isolate an RCS leak in the SI pump rooms
- 30 Minutes
What are the major actions for a RCP HP Seal cooler leak
- Trip the Rx
- Verify Rx control!
- Stop Affected RCP
- Isolate Bleedoff to affected RCP
- Isolate Affected HPSC
What do you do if you cannot isolate a leaking HPSC
- Stop all RCP’s
- Isolate Bleedoff
- Close NC CIV’s
How long do you have to Isolate a HP Seal Cooler leak
- 16.67 minutes
What is required if NC activity >60 Ci
commence plant shutdown
How is a SG tube leak < 1 gpm determined
- Chemical analysis
- Radiation monitoring
What are the differences between RU-141 channels 1/2 (AR filter)
- A Actuates
- B Better
- channel 2 is most sensitive, real time estimate of primary to secondary leak
What are the major actions for “Minimizing Release to the Environment”
- AR filter THRU FILTER
- AFA isolate affected steam line
- SBCV 1007/8 to off
- Isolate AS and CD cross-tie
- DW to the CD service hdr
- Isolate CD overboard
- Demins in service
- SGBD demins in service
What action is required if RU-139/140 (steam line RU’s) alarm
- Secure affected SGBD
What is required if RU-141 (AR) alarms
- Ensure AR filter shift to THRU FILTER
What is required if RU-4/5 (SGBD) alarms
- Secure affected SGBD
What are the volume changes for:
Lpzr
Lvct
Temp
- Lpzr 66 gal/%
- Lvct 40 gal/%
- Temp 123 gal/F
How long does ERFDADS leak rate lag Actual
7.5 minutes
Define
RCS Leakage
Any leakage from within the RCS barrier or from connected systems that are not able to be isolated
Leakage from connected systems that are able to be isolated is NOT RCS leakage
Per LCO 3.4.14 RCS operational leakage, what is the allowed leakage (mode 1-4)
- No pressure boundary
- 1 gpm unidentified
- 10 gpm identified
- 150 gpd through 1 SG
What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge
Cold Leg injection path >1525 psig
vlvs may not open with high DP
What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge
Cold Leg injection path >1525 psig
vlvs may not open with high DP
What causes the LPSI pump to be inoperable if aligned to CH pump alternate discharge
Cold Leg injection path >1525 psig
vlvs may not open with high DP
