ML18081A884

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Operating Procedure PD-15.7.016, Securing Demineralizer Operations & Dewatering, Revision 0
ML18081A884
Person / Time
Site: Salem 
Issue date: 01/08/1980
From:
Public Service Enterprise Group
To:
Shared Package
ML18081A883 List:
References
PROC-800108, NUDOCS 8001110442
Download: ML18081A884 (8)
v • d • e


Text

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PUBLIC SERVICE ELECTRIC & GAS COMPANY ELECTRIC PRODUCTION DEPARTMENT PROCEDURE APPROVAL COVER SHEET PROCEDURE:

PD-15.7.016 SECURING DEMINERALIZER OPERATIONS AND DE-WATERING REMARKS:

(PROCESS CONTROL PROGRAM)

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SALEM GENERATING STATION Purpose RaMation Protection e Instruction SECURING DEMINERALIZER OPERATIONS AND DE-WATERING PD-15.7.016 PAGE 1 OF 7 REVISION o

This procedure describes the proper securing operations and de-watering procedures to be followed for the Chem-Nuclear 10, 195, and 300 cubic feet demineralizer units.

Apparatus/Material..

1.

Chem-Nuclear demineralizer units - 10, 195 and 300 cubic feet.

2.

Chem-Nuclear skid mounted pumping system. (TEPS)

3.

Rad waste collection/storage tanks.

Prerequisites

1.

Insure compressed air (at least 90 psig) is available.

2.

Verify at least one flow path to a drain suitable for handling contaminated liquids in the event of leakage is available.

Precautions

1. Filter and demineralizer vessels are haav-y.

Proper rigging and handling techniques must be followed.

2.

Special care must be excercised when handling radioactive materials to minimize personnel exposure, prevent overexposures and to prevent the spread of contamination.

3.

Strict adherence to all applicable Radiation Exposure Permits and any;other established Radiation Protection requirements is mandatory.

4.

Verify hose connections are secure and properly routed prior to put-ting any water through system.

l I

SALEM GENERATING STATION Ra ation Protection Instruction SECURING DEMINERALIZER OPERATIONS AND DE-WATERING PD-15.7.016 PAGE 2 OF 1 REVISION o

Procedure A.

Securing Systems Which Have 10 ft3 Filtration Units or 10 ft 3 Demin-eralizer Units Installed. (Use attachment 1 as a guide to system piping).

1.

Secure the_pump(s) supplying waste to the TEPS but maintain a flow path for treated waste open until the system has been se-cured.

2.

Observe flow rate and inlet pressure on FM-1 (System Inlet Flow Rate), PI-1 (System Inlet Pressure), and when flow and pressure fall to near zero or stabilize, shut WS-1 (System Inlet Isolation).

Follow step 3 or 4 below as applicable.

3.

If the system is to be shut down a.nd neither of the uni ts are to be removed, observe outlet pressure on PI-6 (Deroin Outlet Pressure).

When pressure stabilizes, shut DM-2 (De-water Pump Bypass).

The system has now been secured.

4.

If the system is to be shut down and a filtration or demineralizer unit is to be removed, adjust SA-1 (Filter/Demineralizer Service Air Regulator) to 20 psi and slowly open SA-3 (Service Air to Filter Inlet) and observe pressure indicators, PI-2 (Filter In-let Pressure), PI-5 (Filter Inlet Pressure), and PI-6 (Deroin Out-let Pressure).

NOTE:

If filter inlet pressure is not greater than demin outlet, air pressure may be increased to 30 psi using SA-1 Filter/Demin-eralizer Service Air Regulator, provided the differential pressure across either unit does not exceed 20 psi.

Continue the air flow until the water has been replaced BY air as in-dicated by periodically opening DM-5 (System Outlet Sample) and noting the absence of water from the sample line, then shut SA-3 (Service Air to Filter Inlet) and when pressure sta-bilizes, shut DM-2 (De-water Pump Bypass) and open FT-1 (Filter Outlet Sample) to relieve any residual pressure.

The system has now been secured and de-watered. (Sup. witness; Doc. on check-off sheet)

SALEM GENERATING STATION Ralation Protection 41 Instruction SECURING DEMINERALIZER OPERATIONS AND DE-WATERING PD-15.7.016 PAGE 3 OF 1 REVISION ° B.

Securing Systems Which Have 10 ft 3 Filtration Units and 195 ft 3 and 300 ft3 Demineralizer Units Installed.

1.

Secure the pump(s) supplying waste to the TEPS but maintain the

.flow path for treated waste open until the system has been secured.

2.

Observe flow rate and inlet pressure on FM-l *(System Inlet Flow Rate) and PI-1 (System Inlet Pressure).

When flow and pressure fall to ne*ar zero pr stabilize, shut WS-1 (System Inlet Isolation) and continue operating the de-watering pump until the pump looses suction, then secure the pump by shutting PR-1 (Service Air to De-water Pump Flow Regulator) and follow step B.3, B.4 or B.5 be-low as applicable.

3.

If the system is to be shut down and neither of the units are to be removed, shut DM-3 De-water Pump Outlet Isolation.

The sys-tem is secured.

4.

If the system is to be shut down and the filtration unit is to be removed, adjust SA-1 (Filter/Demineralizer Service Air Reg-ulator) to 20 psi and slowly open SA-3 (Service Air to Filter Inlet}and continue the air flow until the water has been replaced by air as indicated by periodically opening FT-1 (Filter Outlet Sample) and noting the absence of water from the sample line then shut SA-3 (Service Air to Filter Tnlet) and when pressure sta-bilizes, shut FT-2 (Filter Outlet Isolation) and open WS-4 (Sys-tem Inlet Sample Valve) to relieve any residual pressure.

The system has been secured unless the 195 ft3/300 ft3 demin unit is to be removed, in which case go to step 5 below. (Sup. witness; Doc. on check-off sheet)

5.

Establish or verify the following valve positions:

SW-3 Primary Grade Water to Deroin Outlet Closed DM-1 Dewater Pump Inlet Isolation Open DM-2 Dewater Pump Bypass Closed DM-3 Dewater Pump Outlet Isolation Closed DM-5 System Outlet Sample Closed SA-2 Service Air to Demin Inlet Closed

SALEM GENERATING STATION SA-3 SA-4 FT-1 FT-2 VT-3 iation Protection Instruction SECURING DEMINERALIZER OPERATIONS AND DE-WATERING Service Air to Deroin Outlet Service Air Isolation Filter Outlet Sample Filter Outlet Isolation Deroin Inlet Vent PD-15.7.016 PAGE 4 OF 1 REVISION o

Closed Closed Closed Closed

6.

Verify that water from the dewatering operation is aligned to a liquid Rad.Waste storage tank.

7.

Open DM-3 (Dewater Pump Outlet Isolation)

8.

Valve in air to the pump oy opening SA-I (Service Air Isolation Valve) and adjust Pump Pressure Regulator PR-1 to establish a de-watering flow rate of approximately 15 gpm.

Continue pumping for two hours, increasing the pump rate to approximately 3 Strokes/

second when the pump begins to draw air.

This will de-water the inner annulus.

9.

Close FT-2 (Filter Outlet Isolation Valve) and PR-1 (Service Air to De-water Pump Flow Regulator Valve}.

10.

Open FT-1 (Filter Outlet Sample Valve) to drain the Demineralizer feed leg.

11.

Connect the Deroineralizer Unit outlet hose to the de-watering leg of the outer annulus of the demin vessel and open PR-1 (Service Air to De-Water Pump Flow Regulator Valve).

Continue pumping.for two hours, with an initial de-watering flow rate of approximately 15 gpm.

Increase the pump rate to approximately 3 stroke~/second when the pump begins to draw air. (Sup. witness1 Doc. on check-off sheet)

12.

Close SA-4 (Service Air to Deroin Inlet Valve)

13.

Close PR-1 (Service Air to De-water Pump Flow Regulator Valve).

14.

Close DM-3 (De-water Pump Outlet Isolation Valve).

15.

Prior to transportation or after a 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> stand repeat steps 5 thru 14 by connecting demineralizer connections as indicated in attachment 1, but only pump for l hour on each annulus. (Sup. wit-nes*s: Doc. on cfieck~off s-heet)

16.

Measure the water level in the center annulus standpipe.

If this

J SALEM Ra ation Protection -

PD-15.7.016 GENERATING Instruction STATION SECURING DEMINERALIZER AND DE-WATERING OPERATIONS PAGE s OF 7 REVISION o level exceeds 2 inches, the unit contains more than 1% free standing water.

Additional corrective action will be required to reduce the water below 2 inches.

Contact Rad Waste Coordin-a tor.

(Inspec'tion Irold QC}

17.

Disconnect the inlet, outlet and vent connectors at the unit as applicable.

18.

Close the unit access port with a bolted plate with gasket, a barrel top with gasket.

Pipes may be closed with pipe caps or "Kam-Lok" devices.

(Sup. witness7 Doc. on check-off sheet)

References

1.

Filtration/Demineralization System, Unit No. 3 - Desigg Analysis and Specifications - Chem-Nuclear Systems, Inc. Nov. 10, 1978.

2.

Demineralizer De-watering Test - Chem-Nuclear Systems, Inc. - E0-204, Dec. 6, 1979

I SALEM GENERATING STATION I

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'------- J ation Protection Instruction DEMINERALIZER OPERATION AND DE-WATERING U<.TION l.EG-J ATTACHMENT 1 PD-15.7.016 PAGE 6.0F7 REVISION o

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SALEM Ra PD-15.7.016 GENERATING STATION ation Protection 9 Instruction SECURING BEMINERALIZER OPERATIONS AND DE-WATERING PAGE 1 OF 1 REVISION o

SPENT DEMINERALIZER SHIPMENT PREPARATION CHECK-OFF FORM

1.

Has the 10 Cu. ft. filter been de-watered by procedure step A.4 or B.4?

YES NO __

Supervisory Witness ------------------------

2.

Has the 195/300 Cu. ft. demineralizer, Serial *--------~-----'

been initially dewatered by procedure steps B.5 thru B.ll?

YES NO Supervisory Witness --------------~---------

3.

Has the 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or prior to shipment if greater that 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> de-water been completed as required by procedore step.B.15?

YES NO Supervisory Witness -----------------------

4.

Is the center annulus standpipe water level less than 2" as required by procedure step B.16?

YES ___ NO __

Inspection Bold Point QC -------------------------

5.

Is the access port adequately closed as required by procedure step B.18?

YES _____

NO __

Supervisory Witness --------------------------

Rad Waste Supervisor QC ATTACHUENT 2

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