ML20204H547

Rev 2 to Procedure OI-67, Operation of AMF Waste Evaporator & Waste Condensate Sys

ML20204H547
Person / Time
Site:	Point Beach
Issue date:	05/25/1984
From:	WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
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References
OI-67, NUDOCS 8411120315
Download: ML20204H547 (6)

Text

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Qt 4

• OI-67 MINOR Revision 2 I

05-25-84 OPERATION OF THE AMF WASTE EVAPORATOR &

WASTE CONDENSATE SYSTEM 1.0 PURPOSE 1.1 The purpose of this procedure is to standardize the operation of the AMF waste evaporator.

1.2 Detail the startup, on-line and shutdown operation.

2.0 PRECAUTIONS & LIMITATIONS 2.1 Use normal precautions as would be exercised around thermally hot equipment.

2.2 When it is necessary to be in the area of the waste evaporator during a processing event, a 0-500 mrem dosimeter should be worn and

, radiation monitoring device is available, since it is possible to experience hot spots in the piping, concentrator, etc.

2.3 The concentrated fluid may be very contaminated, therefore, all precautions should be taken to eliminate the possibility of personal contamination. This also makes it impera.tive to use good housekeeping practices.

2.4 Water should be made only to the "A" waste condensate tank to avoid contaminating the "B" waste condensate tank.

3.0 INITIAL CONDITIONS 3.1 Steam is available for heating the unit.

l 3.2 Power is available for operation.

3.3 Rod out the level tube for the feed tank.

3.4 The feed filter and the waste feed pump are available. This persumes that the blowdown evaporator is not being used to process waste.

3.5 Level is established in the distillate tank.

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4.0 OPERATION 4.1 Check valve lineup as follows:

4.1.1 Inside Room VA-13, feed tank outlet valve Open VA-29, feed tank drain Shut 1794A, reactor makeup water valve to feed tank pump suction Shut 1794, reactor makeup water valve to feed tank pump discharge Shut

--- , seal water to feed tank pump from distillate pump open 1756B, drumming loop supply Shut VA-7, drumming loop supply Shut 1756A, drumming loop return Shut VA-8, feed tank discharge sample valve Shut VA-1, feed line eductor inlet One turn open VA-14, concentrator outlet valve Open

--- , feed line eductor inlet pressure gauge isolation Open VA-9, distillate tank outlet open

( VA-10, distillate pump suction drain Shut

--- , distillate eductor inlet open

--- , distillate eductor inlet pressure gauge isolation Open

--- , distillate tank drain Shut VA-11, distillate outlet to waste condensate tanks Shut VA-12, het water pump discharge valve open CC-789, component cooling makeup to hot water expansion tank Shut VA-18, temperature control valve outlet Open VA-19, temperature control valve inlet Open l VA-20, temperature control valve bypass Shut i VA-15, trap inlet open  !

VA-16, trap outlet Open l VA-17, trap bypass One turn open  ?

1792, waste evaporator feed pump suction Open  !

BE-15, waste evaporator feed pump filter l

. bypass to blowdown evaporator , Shut -

1792A, waste evaporator feed pump filter open i inlet 1737, waste evaporator feed pump recirc to waste holdup tank Shut

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4.1.1 Cont'd.

BE-115, waste evaporator feed pump filter discharge to blowdown evaporator Shut 1732, waste evaporator feed pump filter discharge stop open 1762, waste evaporator feed pump filter discharge to waste condensate tanks shut 1736, waste evaporator feed pump discharge to feed tank open VA-31, manual valve to vacuum pump Shut 4.1.2 Outside Room CC-776A, component cooling supply Open CC-776B, component cooling return Throttle to 100 gpm HV-534, steam supply to backpressure regulating valve Open NV-533, backpressure regulating valve bypass shut 1765, waste condensate to "A" waste condensate tank open

. 4.1.3 Control Panel Feed tank heater Auto at 150*F Concentrator level override On

. Conductivity Off Feed pump (P20) Auto All breakers on MCC section , On VA-23, control switch for reflux valve Close VA-5, control switch for flush valve close VA-2, control switch for level valve close Control switch for eductor valve N/A 4.1.4 c59 Control switch for P20 EVAP 4.2 Start the feed tank pump 4.3 Start the distillate pump.

4.4 Start the hot water pump.

D4. 5 Adjust the feed line eductor inlet valve (VA-1) for 35 psig inlet pressure to the eductor.

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4.6 When vacuum in the concentrator is greater than 14" Hg, open the level valve (VA-2) on the control panel.

I 4.7 When the concentrator level is normal, as viewed in the level control chamber window, crack open the steam outlet (HV-536) from the backpressure regulator. Warm up slowly to minimize car ryover.

4.8 After the hot water temperatures have stabilized, Points 2 and 3 on

. the temperature monitor, check the conductivity by turning on the conductivity cell. The temperature compensating dial should be set '

for 120*F.

4.9 When the conductivity is less than 80 pmhos, open the distillate tank outlet valve (VA-11) to the waste condensate tanks.

NOTE: DURING THE TIME PRECEDING THE OPENING OF THE VALVE IN STEP 4.9, THE DISTILLATE TANK LEVEL MUST BE WATCHED. DRAIN THE TANK AS NECESSARY TO PREVENT OVERFLOWING.

4.10 When the conductivity is less than 50 pahos, or at the direction of the Duty Shift Superintendent, pump the "A" waste condensate tank back to the waste holdup tank in order to start a processing run.

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Page 5 I l NOTES & GUIDELINES FOR EVALUATION OF THE OPERATION OF THE WASTE EVAPORATOR l

1. pH should be maintained between 7.0 and 8.0.

2. Freeze point of the feed tank sample should be done once per shift.

3. Keep the Calgon addition pot between one-fourth and three-quarters full.

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4. Add antifoam solution conservatively at the discretion of the Duty Shift Superintendent. An excess of antifoam solution seems to cause a gummy

, residue and silicon balls. Antifoam should be added directly to the

( concentrator by allowing vacuum to suck it in.

5. The vacuum should be between 20" and 21" Hg. If the vacuum gets to be greater than 21" Hg, the valve at the inlet to the distillate eductor should be throttled to control vacuum between 20" and 21" Hg.

6. The valve at the-inlet to the feed line eductor (VA-1) should be throttled to maintain 35 psig inlet pressure to the eductor.

7. If it becomes necessary to run the evaporator in reject for longer than five minutes, the flush valve (VA-5) controlled from the control panel should be

( opened. When the evaporator goes out of the reject mode, close the flush

({. valve (VA-5).

8. The evaporator should be checked every two hours to make certain that:

a. The feed line eductor pressure is 35 psig.

, b. The level is proper and there is activity in the level chamber, t

c. Feed tank level visual agrees with indicated.

, d. Calgon pot level between one-fourth and three-quarters full.

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e. Feed filter differential pressure less than 20 psid and <1 R/hr.

9. If the concentrator high level alarms become frequent, the concentrator float valve chamber sensing line to the concentrator is probably becoming plugged. The unit should be shut down and the line flushed to clear it.

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5.0 WASTE CONDENSATE OPERATION 5.1 Operate the waste condensate system per OP-9A.

5.2 Polishing demineralizer flow should be maintained between 5 & 35 gpm.

5.3 The waste evaporator condensate cooler should be on-line any time the condensate temperature is greater than 130'F.

6.0 TERMINATION OF WASTE EVAPORATOR OPERATION 6.1 Shut the stecm outlet valve (HV-536) from the backpressure regulator.

6.2 When the hot water temperature approaches the concentrator temperature, secure the hot water pump.

6.3 Shut the level valve (VA-2) on the control panel.

6.4 Observe an increase in the level in the waste feed tank and then open the flush valve.

6.5 Allow about three minutes and secure the distillate pump. Vacuum should decrease slowly and then very rapidly.

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6.6 When the feed tank level ceases to rise the feed tank pump can be .

secured.

6.7 Shut the distillate outlet (VA-11) to the waste condensate tank.

6.8 If it is necessary to run the feed tank pump, the distillate pump should also be run to "rovide seal water for the feed tank pump. In ,

tl.is condition the distillate eductor inlet valve should be throttled to about 5 psid inlet to the eductor. The concentrator outlet valve (VA-14) must also be shut at this time.

6.9 Prior to shutting down unit for drumming, process to 18 inches. Then perform a normal shutdown.

6.10 After each shutdown, flush the concentrator float chamber.

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