LOT 202.16 SGBD Flashcards
- LOT 202.16 SGBD*
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What will cause a BDS Isolation signal?
SGNR Level - Low 2 [2/4 on 1/4]
SI
AMSAC
P-4 w/ Source Range Blocked
Shuts BDS ORC valves. (All SGs)
Must be manually reset on CP006.
- LOT 202.16 SGBD*
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What controls or indications are available in the MCR for the BDS?
- CP006:*
- *BDS Isolation Reset**
- *BDS ORC Valves**
- CP018:*
- *BDS Flow Control**
- *Augment Flow Control**
- *Flash Tank Flow Control**
- PV-4165*
- *Flash Tank Level Control**
- LV-4160A & LV-4160*
- *In-Line Radiation Detectors**
- 8022 → 8025*
- RM-11:*
- *All Radiation Detectors**
- 8043 / 8022 → 8025*
- RM-23:*
- *In-Line Radiation Detectors**
- 8022 → 8025*
- LOT 202.16 SGBD*
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What hazard is associated with excessive blowdown flowrates?
Potential damage of 2” piping and Nozzle
- LOT 202.16 SGBD*
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What provides cooling for the BDS HXs?
Condensate
- LOT 202.16 SGBD*
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What is the maximum allowed temperature through the BDS demins?
140 ˚F
135 ˚F will shut LV‑4160 (Flash Tank Normal Level Control Valve) and Open LV-4160A (Flash Tank Bypass Level Control Valve)
Normally demins are bypassed. Used for S/U’s and tube ruptures.
- Note:*
- If Demins bypassed on CP018, LV-4160 will shut at 185 ˚F.*
- LOT 202.16 SGBD*
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Where are the major components in the BDS physically located?
- IVC:*
- *Flow Control Valves (10’)**
- Near AFW pumps*
- *Recirc Pumps (10’) [4]**
- *ORC Valves (21’)**
- Above AFW pumps*
- TGB:*
- *Flash Tank (63’)**
- S Mezzanine*
- *BDS HXs (63’) [4]**
- S Mezzanine*
- MAB:*
- *Prefilters (35’) [2]**
- *Demins (35’) [2]**
- (Normally connected in series)*
- *Offline Monitor (RT-8043) (41’)**
- Solid Waste Handling Area*
- EAB:*
- *RT8022/8024 [A/C SGs] 60’**
- Pen Space*
- *RT8023/8025 [B/D SGs] 10’**
- Pen Space*
- LOT 202.16 SGBD*
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What is the purpose of the offline radiation monitor (RT-8043)?
Prevents discharge of contaminated BD to Neutralization Basin
Other 4 in-line monitors (RT8022-8025) detect primary → secondary leakage.
- LOT 202.16 SGBD*
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Where in the S/G does blowdown take suction?
- Normal:*
- *Just above tubesheet**
- 96 gpm*
- High Flow B/D:*
- *Downcomer**
- 190 gpm (1 SG at a time)*
- LOT 202.16 SGBD*
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What will cause the BDS Flash Tank steam to re-align from FW HTRS 13A/13B to the main condenser?
Turbine Trip
OR
High 2 level in FW HTR 13A AND 13B
High 2 level in one FW HTR will shut isolation valve for that FW HTR but steam will still be supplied to the other FW HTR.
- LOT 202.16 SGBD*
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What is the allowable primary → secondary leakeage?
≤ 150 gpd
Considered identified leakage.
LCO 3.4.6.2 Operational Leakage
