SALEM
SALEM STUDY SYSTEM
Systems > CVCS

CVCS

⚠️ DRAFT

CVCS

Function

Controls RCS chemistry, inventory, and boron concentration. Provides charging flow, letdown flow, RCP seal injection, boron concentration control, RCS chemistry control, and RCS inventory control. (UFSAR 9.3.4)

Design Bases

  • Reactivity hold-down: Compensates for fuel burnup and fission product poisoning by adjusting boron concentration
  • Hot shutdown capability: Can borate RCS to hot shutdown boron concentration
  • Cold shutdown capability: Can borate RCS to cold shutdown conditions
  • Provides seal water injection to RCPs (8 gpm per pump) (UFSAR 9.3.4.1)

Major Components

  • Centrifugal Charging Pumps: 2 per unit (21 and 22). Also serve as high-head SI pumps during LOCA. Design pressure 2800 psig, design flow 150 gpm, shutoff head 2670 psig. (UFSAR T6.3-5)
  • Positive Displacement Charging Pump: 1 per unit (23). Powered from 460V bus.
  • Letdown Orifices: Control letdown flow rate
  • Letdown Heat Exchanger: Cools letdown flow (via CCW) before processing
  • Mixed Bed Demineralizers: Remove ionic impurities and fission products. The Cation Demineralizer is used for Lithium removal and pH control (not the mixed bed).
  • Cation Demineralizer: Removes Lithium from the RCS and maintains RCS pH
  • Volume Control Tank (VCT): Surge volume for charging/letdown mismatch. Hydrogen cover gas for dissolved gas control.
  • Boric Acid Tanks (BATs): Store concentrated boric acid solution (6560–6990 ppm per TS). Solution temperature maintained ≥63°F to prevent precipitation.
  • Boric Acid Transfer Pumps: Transfer boric acid from BATs to RCS
  • Excess Letdown Heat Exchanger: Alternate letdown path (UFSAR 9.3.4.2)

Reactor Makeup Control Modes

  • Dilution: Increases primary water supply flow, decreases boron concentration
  • Boration: Transfers boric acid from BATs to charging pump suction
  • Automatic Makeup: Maintains VCT level by automatically adjusting primary water and boric acid flows (UFSAR 9.3.4.2.4)
Exam — 2018 Q31
2CV179 (PRIMARY WATER FLOW) fails CLOSED on loss of 125 VDC power. During auto makeup with CV179 failed closed, only boron flows through the blender (no primary water dilution) → actual RCS boron concentration rises → negative reactivity inserted → Source Range NI Audible Count Rate indication lowers. If CV179 failed OPEN, primary water flow would dilute → RCS boron lowers → positive reactivity → SR audible count rate rises.
Exam — 2018 Q40
VCT Level Transmitter 2LT-112 failure to 80%: CV-35 fully diverts to CVCS Holdup Tanks at 87% (no modulation). With LT-112 at 80% (below 87%), CV-35 remains fully aligned to VCT and actual VCT level is stable. LT-112 is the controlling transmitter for AUTO MAKE-UP — with LT-112 failed at 80%, auto make-up will NOT start even if actual VCT level reaches the auto make-up setpoint. If LT-114 had failed to 80% instead, CV-35 would divert to holdup tanks (LT-114 controls CV-35) and VCT level would lower. LT-112 controls auto make-up; LT-114 controls CV-35 divert.
Exam — 2019 Q3
1CV179 (PRIMARY WATER FLOW) fails CLOSED on loss of 125 VDC power. During auto makeup with CV179 failed closed, actual boron flow through the blender is higher than the setpoint → RCS boron concentration rises → negative reactivity → Tavg lowers → control rods step OUT (manually) to restore Tavg. If CV179 failed OPEN, primary water flow would be excessive → RCS dilution → rods step IN. The failure mode (closed) is key. Primary Water Flow Deviation Alarm setpoint: ±5.0 gpm. Boric Acid Flow Deviation Alarm setpoint: ±0.8 gpm (different alarm, common distractor).
Exam — 2023 Q29
VCT level control logic: only LT-112 actuates automatic make-up. Automatic swapover to RWST requires 2/2 coincidence (LT-112 AND LT-114) at low-low VCT level. CV35 (high level divert valve) opens on LT-112 high signal. If LT-112 fails HIGH: CV35 opens and drains the VCT, auto make-up will NOT actuate (controller sees high level), and auto swapover to RWST will NOT occur (2/2 coincidence not met with LT-112 failed high). The charging pump loses suction as VCT empties, resulting in charging pump cavitation and damage.
Exam — 2019 Q54
LT-112 fails to 50% with a 15 gpm RCS leak: with LT-112 failed at 50%, NO automatic RCS make-up is possible (auto make-up starts at 14% and stops at 24% — LT-112 reads 50%, well above the start setpoint). Auto swapover to RWST requires BOTH LT-112 AND LT-114 reading 3.57% — with LT-112 stuck at 50%, the 2/2 coincidence will never be met. Result: actual VCT level lowers to below 3.57% and the charging pump eventually loses suction. Trap: if LT-114 had failed (instead of LT-112), auto make-up would still function via LT-112, and VCT would cycle between 14% and 24%. Also: 11% is the VCT low level alarm setpoint, not the auto make-up start setpoint (14%).
Exam — 2020 Q12
VCT level monitoring and overpressure protection: LT-114 is only available in the control room via the plant computer (NOT on the control console). LT-114 is also located in Panel 216 in charging pump alley. VCT overpressure protection is provided by 2CV241, VCT relief valve, set to 75 psig, relieving to the CVCS HUT. When either VCT level controller (LT-112 or LT-114) is placed in MANUAL, it overrides the auto function of the other controller. With LT-112 in MANUAL FLOW TO VCT, the LT-114 Hagen controller will NOT automatically divert 2CV35 to the CVCS HUT at 77-87% VCT level.

Charging Pump Power Supplies

PumpPower SupplySource
21 CV Pump2B 4KV Vital BusNOS05CVCS00-17
22 CV Pump2C 4KV Vital BusNOS05CVCS00-17
23 CV Pump2A 460V BusNOS05CVCS00-17
Exam — 2020 Q29
On loss of 2C 4KV bus (bus differential): 22 CV Pump is lost (powered from 2C). Available charging pumps: 21 CV Pump (2B 4KV bus) and 23 CV Pump (2A 460V bus). 23 CV Pump is powered from the 2A 460V bus, NOT 2C 4KV — a common distractor. It remains available on loss of 2C.

Charging Flow Paths and SI Isolation

Exam — 2020 Q30
Post-SI effect on CV71 (Seal Pressure Control Valve): CV-68 and CV-69 (Charging Header Isolation Valves) go CLOSED on an SI signal. These valves are in series with the CV-71 flow path to the charging header/regenerative HX. Therefore, throttling CV-71 after SI has NO effect on charging pump discharge pressure or total charging flow — the flow path through CV-71 is already isolated by CV-68/69. During normal power alignment, throttling CV-71 closed would raise charging pump discharge pressure and redirect flow to RCP seals. After SI, this relationship does not apply because the downstream path is isolated.

Charging and Letdown

Exam — 2022 Q29
Letdown temperature auto-divert: 2CV21 automatically diverts letdown flow to VCT (bypassing mixed bed demineralizers) at 136°F. Procedural limit per S2.OP-SO.CVC-0012 is 140°F to prevent resin damage. Rising letdown temperature causes demineralizers to release boron into the RCS (RCS boron concentration rises). 2CV35 diverts to Hold-Up Tanks on high VCT level — it is downstream of the demineralizers and does NOT bypass them.
Exam — 2018 Q69
Per AB.RC-0002 (High Activity in RCS) Step 3.15: crew is required to transfer to a Centrifugal Charging Pump (CCP) and secure the 13 Charging Pump (PDP). Step 3.16: maximize letdown flow by placing 1CV3 (45 GPM ORIFICE) in service in addition to 1CV4 (75 GPM ORIFICE) already in service. Trap: 13 Charging Pump is the PDP, NOT a CCP. Maximized letdown = both 75 gpm and 45 gpm orifices in service (120 gpm total), not just the largest orifice alone.
Exam — 2022 Q30
2CV3 letdown orifice = 45 gpm. When placing second orifice in service, letdown pressure and flow rise. 2CV18 (Letdown Pressure Control Valve) must be manually throttled OPEN to maintain letdown pressure at target ~300 psig. 2CV6 (Letdown Relief Valve) setpoint = 600 psig. 2CC71 (Letdown HX Temp Control Valve) auto-modulates OPEN to increase CCW flow through the letdown HX as temperature rises.
Exam — 2018 Q52
Charging line leak diagnosis: seal injection flow lowering + PZR level lowering + 2R41 (Plant Radiation Monitor) rising + letdown line flashing = charging line leak (not letdown line). The key discriminator is seal injection flow lowering — a charging line leak upstream of the seal injection takeoff reduces seal injection flow. A letdown line leak does not affect seal injection flow. A charging line leak IS an entry condition for AB.CVC-0001.
  • Normal charging flow: One charging pump maintains RCS inventory and PZR level
  • Seal injection: 8 gpm per RCP (32 gpm total for 4 RCPs)
  • Seal return: 3 gpm per RCP
  • CV55 (Charging Flow Control Valve): Controls total charging flow to the RCS
  • CV71 (Charging Header PCV): Backpressure control valve downstream of seal injection takeoff
  • CV73 (Seal Injection Pressure Control Bypass Valve): Manual bypass around CV71, used during Control Room Evacuation
Exam — 2020 Q86
Seal injection control during CR evacuation (AB.CR-0001): CV-71 is isolated (by closing CV-70) and CV-73 (seal injection pressure control bypass valve) is opened and manually adjusted. Charging flow is then controlled locally at CV-55 local controller in Panel 216 using a centrifugal charging pump. 23 Charging Pump (PD pump) is tripped by the procedure once a centrifugal pump is verified running — do NOT use the 23 Charging Pump scoop tube for flow control during CR evacuation.
- **Letdown:** Controlled by letdown orifices, cooled by letdown HX, processed through demineralizers - **Excess letdown:** Alternate path available if normal letdown is unavailable
Exam — 2020 Q5
Excess letdown flow path during SI: Excess Letdown Isolation Valves (2CV278, 2CV131) do NOT receive automatic closure signals on SI/Phase A. Seal Return Isolation Valves (2CV284, 2CV116) close automatically on Phase A. After SI, seal return path is blocked → excess letdown flow continues through CV278/CV131 but downstream path is closed → CV115 (Seal Return Relief Valve) cycles, relieving flow to the PRT (not RCDT). CV134 (3-way valve directing excess letdown to VCT or RCDT) fails to VCT on loss of power and air. Trap: eventually control air bleeddown from Phase A CA-330 isolation may fail CV278/CV131 closed, but this takes considerable time — the immediate effect is continued flow relieving to PRT via CV115.
Exam — 2022 Q6
23 Charging Pump speed controller has a low speed stop maintaining minimum charging flow of 47 gpm for RCP seal injection. When MFC demand lowers, charging flow stops at 47 gpm (not zero). Per AB.CVC-0001 step 3.109, if MFC malfunction with 23 Charging Pump in service, take manual control of 23 Charging Pump Speed Controller. Not 2CV55 — 2CV55 only controls flow with centrifugal charging pumps, not the positive displacement 23 Charging Pump.
Exam — 2023 Q3
CV71 acts as a backpressure control valve affecting both charging and seal injection flows. Throttling CV71 CLOSED raises backpressure → seal injection flow RISES and charging flow LOWERS. Throttling CV71 OPEN lowers backpressure → seal injection flow LOWERS and charging flow RISES. This relationship is critical during RCS leak response when adjusting charging to stabilize PZR level.

Rapid Boration

Exam — 2023 Q19
Rapid boration via BAT pump and 2CV175 requires adequate flow of 36 gpm. If rapid boration flow is inadequate (e.g., only 20 gpm indicated), per EOP-TRIP-2: stop BAT pump, realign charging pump suction to the RWST, and maintain charging flow > 87 gpm. Note: EOP-FRSM-1 has a different pathway (cold leg injection via BIT valves) — do not confuse with EOP-TRIP-2 actions.
Exam — 2020 Q21
EOP-TRIP-2 rapid boration when 2CV175 fails to open: OPEN 2SJ1 and 2SJ2 (RWST to charging suction), then CLOSE 2CV40 and 2CV41 (VCT to charging suction) to realign charging suction from VCT to RWST. Alternate rapid boration paths via 2CV174 (Blender Bypass), 2CV172/2CV185 (normal boration), or 2CV172/2CV181 (blender to VCT) exist in S2.OP-SO.CVC-0008 but are NOT directed in TRIP-2. Also note: 2CV181 directs boration flow to the top of VCT (spray nozzle) — boration flow is never directed there.
Exam — 2023 Q22
During high RCS activity (below TS limits), per AB.RC-0002: maximize letdown flow to accelerate RCS cleanup through the demineralizers. Do NOT reduce letdown — increasing letdown is the correct response to accelerate cleanup.
Exam — 2019 Q2
Per AB.RC-0002 during high RCS activity: Step 3.14 requires a Centrifugal Charging Pump (CCP) in service — crew is NOT required to swap to the PDP (13 Charging Pump). Step 3.16 directs maximize letdown flow: place 1CV3 (45 GPM ORIFICE) in service in addition to the already in-service 1CV4 (75 GPM ORIFICE). Do NOT place both 75 gpm orifices (1CV4 + 1CV5) in service — the maximized lineup is one 75 gpm orifice plus the 45 gpm orifice.
Exam — 2023 Q28
If 2TE-130 (temperature detector for 2CC71, Letdown HX Temp Control Valve) fails LOW, the controller sees low temperature and drives 2CC71 closed (reduces CCW cooling flow through the letdown HX). With less cooling, letdown HX outlet temperature rises. Hotter letdown water flowing through the mixed bed demineralizers causes boron release into the RCS (boration effect), which lowers Tavg.
Exam — 2018 Q2
Mixed bed demineralizer function: removes chemical impurities from the RCS (NOT Lithium control — the Cation Demineralizer provides Lithium removal and pH control). Boron removal is more efficient at lower temperatures. When 2CC71 malfunctions and letdown temperature rises to 130°F, the demineralizer releases boron into the RCS → negative reactivity insertion → RCS TAVG lowers (with Rod Bank Selector in MANUAL, no automatic rod withdrawal to compensate). Trap: candidates may think the demineralizer absorbs more boron at higher temps (it does the opposite). Also: Cation Demin is for Lithium/pH, not mixed bed.
Exam — 2023 Q45
23 charging pump is supplied from the 2A 460V bus. Loss of the 2A 460V MCC de-energizes 23 charging pump, causing loss of charging flow and letdown isolation. Per S2.OP-AB.460-0001: start a centrifugal charging pump and restore PZR level, then re-establish letdown.
Exam -- 2023 Q97
RCS leak from CVCS (2CV6 Letdown Relief Valve): a CVCS leak that can be isolated does NOT require entry into TS 3.4.7.2 (Operational Leakage). The CVCS is considered an auxiliary system, not part of the RCS pressure boundary. Once letdown is isolated and the leakage stops, TS 3.4.7.2 remains MET and an Emergency Declaration (UE EAL SU5.1) is NOT required. Trap: the 12 gpm leak from 2CV6 is NOT RCS pressure boundary leakage because the CVCS is auxiliary piping outside the RCS boundary.
Exam -- 2023 Q98
CVCS Monitor Tank release with 2R18 inoperable: the SM/CRS authorizes the liquid radioactive waste release (not the Radiation Protection Manager). Per ODCM 3.3.8, with 2R18 inoperable, Action 26 requires at least two independent samples analyzed AND at least two technically qualified staff independently verify release rate calculations and discharge line valving.
Exam — 2020 Q77
Loss of one centrifugal charging pump: 23 Charging Pump (positive displacement) counts toward TS 3.1.2.4 (Charging Pumps — Operating) requirement for reactivity addition capability. With 21 CHP tripped and 23 CHP started: two charging pumps remain OPERABLE (22 + 23) for reactivity TS, and two boration flow paths remain OPERABLE for TS 3.1.2.2. Only TS 3.5.2 (ECCS) applies — 21 CHP is the high-head ECCS component, and 23 CHP is NOT an ECCS high-head pump.
Exam — 2019 Q50
PZR Safety Valve seat leakage (vapor space LOCA): actual PZR level lowers below program level → master flow controller automatically raises charging flow to compensate. Trap: PZR Safety Valves are on top of the PZR — steam leaking out reduces steam space volume, which lowers level. Candidates may incorrectly think level rises because the leak is "at the top." As RCS pressure lowers, the OTΔT trip setpoint automatically lowers (pressure-dependent variable setpoint), causing the first automatic reactor trip before reaching the fixed low PZR pressure trip at 1865 psig.

Cross-Unit Charging

Exam — 2020 Q91
Per AB.CVC-0001 step 3.50, with no Unit 2 Charging Pumps available: "COORDINATE with Unit 1 to place 13 Charging Pump in service using U/1 RWST." This cross-unit alignment provides charging flow when all three Unit 2 pumps (21, 22, 23 CV Pumps) are unavailable. Trap: Tripping the reactor and initiating SI is NOT the directed action for total loss of charging at 8% power — AB.CVC-0001 provides the cross-unit recovery path first.

Tech Spec LCOs

JPM — 2023 Sim-c
EOP-LOCA-2 auxiliary spray depressurization: open 2CV75 (Aux Spray Valve), close 2CV77 (Charging to Loop 23) and 2CV79 (Charging to Loop 24) to redirect charging flow through the aux spray line to the pressurizer. Restore by closing 2CV75 and reopening 2CV77 or 2CV79.
Exam — 2018 Q28
Spurious Phase A Containment Isolation at 100% power with 1CV5 (75 GPM ORIFICE) in service: 1CV284 & 1CV116 (RCP Seal Water Return Horizontal Stop Valves) close on Phase A, blocking the normal seal return path to the VCT. Seal return flow is redirected to the PRT via Relief Valve 1CV15. Letdown is isolated by closing 1CV5 and 1CV7 (Phase A isolation valves). Trap: 1CV2 and 1CV277 (Letdown Line Isolation Valves) close on LOW PZR LEVEL — NOT on Phase A. Do not confuse CV2/CV277 interlocks with the letdown orifice (CV5) and HX inlet (CV7) Phase A isolation.
Exam — 2018 Q29
Confirms charging pump power supplies: 21 Centrifugal Charging Pump — 2B 4KV Vital Bus; 22 Centrifugal Charging Pump — 2C 4KV Vital Bus. With three 4KV Vital Buses powering two trains of ECCS pumps, the bus-to-pump mapping must be memorized — pump number does NOT always correspond to bus letter.
Exam — 2020 Q55
Excess Letdown CCW isolation on Phase A: CC113 and CC215 (Excess Letdown Component Cooling Valves) receive a Phase A signal to close. This is distinct from normal letdown isolation — CV2 and CV277 (Letdown Isolation Valves) do NOT close on Phase A; they close only on low PZR level. CV2/CV277 are NOT containment isolation valves. The Phase A letdown isolation valves for normal letdown are CV3, CV4, CV5, and CV7.
Exam — 2022 Q54
Letdown orifice isolation valves (CV3, CV4, CV5) close on: Phase A signal, CV2 or CV277 closing, PZR level <17%, trip all charging pumps, or manual Phase A actuation from the safeguards bezel. CV4 receives a closure signal directly from Phase A (not directly from SI). SI actuates Phase A, which then closes CV4. CV2 and CV277 (letdown isolation valves) close on PZR low level <17% — NOT directly on SI or Phase A. Do not confuse CV2/CV277 interlocks with the letdown orifice valve (CV4) Phase A closure signal.
JPM — 2019 RO-A2
Borated Water Sources surveillance (S2.OP-ST.CVC-0010): combined BAST level 48% + 48% = 96%. Per TS 3.1.2.6 Figure 3.1-2 at 6650 ppm, required level is >96.5% — UNSAT. Concentration also UNSAT: 6650 ppm vs ~6675 ppm required from Figure 3.1-2 at 96% level. Narrow margins test precise figure reading. RWST parameters (41.4 ft, 70 F, 2350 ppm) and BAST temps (100 F, 98.1 F) are all SAT.
JPM — 2022 RO-A2
BAST level-to-volume conversions using S2.OP-TM.ZZ-0002 tank curves: 94% = 7400 gal, 76% = 6000 gal. After 105 minutes rapid boration at 40 GPM (4200 gal total, 2100 gal per BAST): 21 BAST final = 5300 gal = 67%, 22 BAST final = 3900 gal = 49%. EOP-TRIP-2 Step 4 requires 35 minutes of rapid boration per stuck rod.
JPM — 2020 IP-i
Control Room Evacuation local charging flow control (AB.CR-0001 Attachment 5 Step 8.0): at Panel 216-1 (Chg Pmps FL & PR Inst Pnl) in Unit 2 RCA, place E/P Bypass Line Selector Valve in MAN, read 2FI-128A, then use the MANUAL hand air operator to adjust 2CV55 charging flow to 70 gpm. 2CV55 is air-to-close (fails open on loss of air) — clockwise on the hand air operator raises air pressure and LOWERS flow.
JPM — 2022 IP-j
During Unit 1 Control Room Evacuation (AB.CR-0001 Att. 5), after locally opening all four reactor trip/bypass breakers: open 1AX1AX7X (#13 Charging Pump breaker) to stop uncontrolled charging, and open 1CY2AX4I (1CV175 Rapid Borate Stop Valve breaker) to de-energize the valve and stop potential uncontrolled boration.
JPM — 2018 Sim-b
Manual makeup to VCT (S2.OP-SO.CVC-0006 Section 5.2): entered AB.CVC-0001 due to 2LT112 failing high. With 900 ppm RCS boron and 6700 ppm BAST concentration, determine boric acid flow setpoint using Figure 100A from S2.RE-RA.ZZ-0012 for 62 gpm PW flow — setpoint is ~9.6 gpm (9-11 gpm acceptable). Figure 100C is WRONG (9000 ppm boron). Figure 105 (temperature correction) is N/A at 100% power. Place 2CV179 and 2CV172 in MANUAL/CLOSE — note 2CV179 will initially go full open when placed in MANUAL. Align blender outlet via 2CV185 (preferred — charging pump suction). Start PW pump MANUAL, BA pump MANUAL/FAST. Adjust flows on FI110A and FI111A. When VCT at 53%, secure all and return BA pump to SLOW speed.
JPM — 2022 Sim-b
Manual makeup to VCT (S2.OP-SO.CVC-0006 Section 5.2): with 900 ppm RCS boron and 6700 ppm BAST concentration, determine boric acid flow setpoint using Figure 100A from S2.RE-RA.ZZ-0012 for 62 gpm PW flow — setpoint is ~9.6 gpm (9-11 gpm acceptable). Place 2CV179 and 2CV172 in MANUAL/CLOSE, align blender outlet via 2CV185 (preferred — to charging pump suction) or 2CV181. Start PW pump in MANUAL, BA pump in MANUAL/FAST. Adjust BA flow on FI110A, PW flow on FI111A to 62 gpm. When VCT at 53%, secure makeup.
JPM — 2019 IP-i
Emergency boration during CR Evacuation (AB.CR-0001, Attachment 5, Step 10): close 11CV160 and 12CV160 air supply isolation valves and open draincocks at Pnl 701-1A and 701-1B (El 122 ft, near BASTs). CV160 recirc valves fail closed on loss of air, forcing boric acid flow through charging pump suction instead of recirculating to BASTs. Open 1CV175 (Rapid Borate Stop Valve) by disengaging clutch and rotating handwheel CCW. Adjust charging flow at Panel 216-1 to 99 gpm total (75 gpm boration + 24 gpm for 4 RCP seals at 6 gpm each).
JPM — 2018 IP-j
Control Room Evacuation local charging flow control: at Panel 216-1 (Unit 1 Chg Pmps FL & PR Inst Pnl) in 84 ft El. Aux Bldg Charging Valve Alley. Available indications: 1CV55 AUTO/MANUAL Selector Switch, 1CV55 Manual HAND/AIR Regulator Control, 1FI-128A (Charging Pump Flow Indication), 1PI-142B (11/12 Charging Pump Pressure), 1LT-114 (VCT Level). Typical charging flow ~87-89 gpm. 1CV55 is fail-open (air-to-close): lower air pressure (counterclockwise on hand sender) = OPEN valve = RAISE flow. Raising air pressure (clockwise) = CLOSE valve = LOWER flow.
JPM — 2018 SRO-A3
Tagging review for 11 Charging pump removal on Unit 1: DWG 205228 Sheet 2 missing three blocking points per S1.OP-SO.CVC-0002: (1) 1CV81 (DISCH VALVE) — must be CLOSED (step 4.9.4.2), (2) 1CV136 (RECIRC STOP VALVE) — must be CLOSED (step 4.9.4.4; 1CV135 is a check valve, insufficient isolation), (3) 1CV356 (SUCT VENT) — must be OPEN (step 4.9.4.7). Applicable Tech Spec: TS 3.5.2 — charging pumps are ECCS components.

Connections