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My NLIT > CH-Reactor Makeup Water and Refueling Water Subsystems > Flashcards

CH-Reactor Makeup Water and Refueling Water Subsystems Flashcards

1
Q

What is the CVCS Makeup water subsystem?

A

Proides pure RX makeup water and borated refueling water to compensate for leakage.

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2
Q

Where can the RX Makeup Water Tansk send nonborated water to?

A

Gas stripper, liquid radwaste evap, boric acid concentrator, solid radwaste for resin xfrs, charging pumps for seal lube, CVCS chemical add tank, RDT, EDT, VCT, charging pumps suct, RWT, and CVCS HUT.

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3
Q

Where does the high suction line on the RWT send borated water to?

A

Through BAMP to SFP to the SFP cleanup subsystem, Through Boric acid filter to blending tee to CVCS charging/letdown system to VCT or charging pump suction.

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4
Q

How is the RWT connected to safety injection?

A

Two 20” line provide water from the RWT to the SI pumps (HPSI, LPSI, and CS)

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5
Q

Where do the gravity feed flow paths lead?

A

Charging Pump Suction

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6
Q

What is the blending tee?

A

Combines nonborated water from the RMWT and borated water from RWT to charging pumps. The changes take about 20 mins to see in the VCT.

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7
Q

What is the boric acid batch tank?

A

Take flow from the RMW pump or BAMP to boric acid batch tank eductor the final solution is directed to the RWT.

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8
Q

What can supply emergency boration via gravity flow?

A

Spent Fuel Pool

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9
Q

What is the purpose of the Reactor Makeup Water Tank?

A

Alternate source for safety related Aux FW Pumps, provides dilute Rx Mkup water during norm op, provides hi quality water to promote recycle of dilution water.

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10
Q

What is the design of the Reactor Makeup Water Tank?

A

Stainless steel 480,000 gal 2 set of redundant 5kW heaters keeps water >40*. Vented to atm and overflow to CVCS HUT sump

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11
Q

What is the normal makeup water supply to the RMWT

A

Demineralized Water and alternately Recycle Monitor Tank in the liquid radwast system.

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12
Q

What is the purpose of the Reactor Makeup Water Pumps?

A

Provide makeup water flow from the RMWT throughout the makeup water subsystem.

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13
Q

What is the design of the Reactor Makeup Water Pumps?

A

CPs rated at 165gpm, power from NH, 1 normally running 1 in standby. Only one pump can run at a time. They trip on lo-lo level and lo discharge pressure.

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14
Q

What is the purpose of the Reactor Makeup Water Recirculation Valve?

A

Opens to allow recirc of Rx Makeup Water back to RMWT at low dilution flows <20gpm. Closes to provide full dilution flow at hi demands when providing makeup water to the VCT.

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15
Q

What is the design of the Reacttor Makeup water recirculation valve?

A

Air operated diaphragm valve normally op by CR. Reverse operated….clockwise will open counterclockwise will close it.

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16
Q

What is the design of the Reactor Makeup water recirculation valve?

A

Air operated diaphragm valve normally op by CR. Reverse operated….clockwise will open counterclockwise will close it.

17
Q

What is the purpose of the Reactor Makeup Water Flow Control Valve?

A

Controls reactor makeup water flow through the blending tee into the 1.RCS via the VCT or Charging pump suct. 2.Boric Acid batch tank eductor to either the RWT or CVCS hut.

18
Q

What is the design of the Reactor Makeup water flow control valve?

A

A coriolis type sensor measures flow rate RO sets flow rate valve fails closed on loss of air or power to solenoid control valve.

19
Q

What is the purpose of the Refuling Water Tank?

A

Supports the ECCS and CS subsystems by providing a source of borated water for ESF pump op, provide borate water for norm op recycle, and provide borated water MKUP during postulated design events.

20
Q

What is the design of the Refueling Water Tank?

A

Concrete Tank lined with Stainless steel to meet seismic cat 1. Concrete provides sheilding, stores up to 750,000 gal of water borated to 4000-4400ppm, 2 heaters keep between 60-120F, vented to norm exhaust, overflow 2 CVCS HUT sump.

21
Q

What is the makeup source to the RWT?

A

Normal CVCS HUT via CVCS HUT pump. (Chemistry adjusts boron)

22
Q

When is Boric Acid Batching done?

A

Shortly before outage to maximize RWT borated water volume for the outage.

23
Q

How can we transer water from the Safety Injection Tanks to the RWT?

A

Via LPSI or CS pumps

24
Q

How do we detect level in the RWT?

A

4 Class powered level detectors provide a RAS xfrs suction for the SI pumps to the Containment sump and stops the LPSI pump, 1 non-class stops BAMPs on a lo-lo level in the RWT 1 non-class provide level idication and alarms in CR

25
Q

What is the purpose of the Boric Acid Makeup Pumps?

A

Provide borated water flow from the RWT throughout the makeup water subsystem.

26
Q

What is the design of the Boric Acid Makeup Pumps?

A

2 single stage CP with mechanical seals, 165gpm at 150psig discharge press, powered by NH, one can supply enough water for all 3 charging pumps. They also recirculate RWT contents for cleanup through boric acid filter.

27
Q

What is the purpose of the Boric Acid Makeup Pump Recirculation Valve?

A

Opens to allow recir of boric acid to the RWT on low boration flows <20gpm.
Closes to allow full boration flow on high boration demand.

28
Q

What is the design of the Boric Acid Makeup Pump Recirculation Valve?

A

Air op diaphragm valve norm op by CR. Norm in neutral. Reverse op clockwise will open counterclockwise will close.

29
Q

What is the purpose of the Boric Acid Flow Control Valve?

A

Control the borated water flow rate to the CVCS charging/letdown subsystem and through the boric acid batch tank eductor.

30
Q

What is the design of the Boric Acid Flow Control Valve?

A

Coriolis typer sensor measures flow rate from RWT to the blending tee set by CR. Valve fails closed on loss of IA or power

31
Q

What is the purpose of the Boric Acid Batch Tank?

A

Provides a mean of batching the crystalline boric acid with water for adjusting the concentration in the RWT or SFP.

32
Q

What is the design of the Boric Acid Batch Tank?

A

Small 630 gal (norm 489gal used) stainless steal with heaters and a motor driven mixer. Water from RMWT used heated to 155-160 mixer turned on and acid powder is added. Chemistry dept selects amount&discharge pump. AOs keep pump at 33gpm

33
Q

What is the Tech Spec 3.5.5 Refueling Water Tank?

A

RWT shall be OPERABLE in modes 1-4.
>60*, 4000-4400ppm, and water volume acceptable.

34
Q

What are the requirements for Emergency Boration of the RCS?
T3.1.104 Borated Sources-Shutdown

A

At a minimum, one of two borated water sources shall be FUNCTIONAL:
SFP or RWT

35
Q

What are the TRMs for T3.1.100 Flow Paths-Shutdown?

A

A minimum one boron injection flow paths shall be FUNCTIONAL:
SFP via gravity to charging pump into RCS
RWT via charging pump, HPSI, or LPSI to the RCS.

36
Q

What are the TRMs for the T3.1.101 Flow Paths-Operating?

A

At least two of three boron injection paths shall be FUNCTIONAL:
Gravity from RWT or SFP thru CH-536 to charging pump to RCS,
Gravity from RWT thru CH-327 to charging pumps to RCS, from RWT thru CH-164 to pump to RCS.

37
Q

What does a FUNCTIONAL boration system consist of?

A

Aborated water source, gravity fed suction pathway, a pump powered by ER power supply, and a discharge path.

38
Q

What modifications were made to the CVCS system to support the PVNGS extended loww of all site AC?

A

Primary FLEX Makeup to RCS is a FLEX RCS pdp from the side.
Alt FLEX Makeup to RCS is a FLEX RCS pdp from the bottom.

My NLIT (18 decks)

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