ML20204H477

Rev 8 to Procedure OI-21, Mixed Bed (Hoh) Demineralizer Resin Flush & Recharge,1U1A(B) & 2UIA(B)

ML20204H477
Person / Time
Site:	Point Beach
Issue date:	11/18/1983
From:	WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML20204H448	List: ML20204H444 ML20204H451 ML20204H456 ML20204H461 ML20204H469 ML20204H477 ML20204H484 ML20204H489 ML20204H507 ML20204H519 ML20204H533 ML20204H547 ML20204H571 ML20204H578 ML20204H589 ML20204H596 ML20204H606 ML20204H616 ML20204H622 ML20204H638 ML20204H650 ML20204H661 ML20204H677 ML20204H697 ML20204H711 ML20204H724 ML20204H728 ML20204H748 ML20204H754 ML20204H760 ML20204H764 ML20204H776 ML20204H807 ML20204H818 ML20204H828 ML20204H837
References
OI-21, NUDOCS 8411120300
Download: ML20204H477 (6)

Text

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m Date OI-21 OPS Supervisor MINOR Chem Lkb Records Revision 8 Updated 11-18-83 OPS Office Records Updated MIXED BED (H0H) DEMINERALIZER RESIN FLUSH & RECHARGE, 1U1A(B) & 2U1A(B) 1.0 PURPOSE 1.1 To sluice the spent resin out of the "A" ("B") mixed bed demineralizer.

1.2 To recharge the demineralizer with fresh resin.

2.0 PRECAUTIONS & LIMITATIONS 2.1 Have Health Physics monitor the demineralizer (contact and general area) prior to start of sluice. Monitor the El. 26' & El. 8' level of the auxiliary building after completion of the sluice.

2.2 All work activities around area of sluice line, where radiation levels will increase, have been temporarily terminated.

2.3 Resin storage tank T112 relief valve is set at 150 psig. Monitor the cask continuously during flushing operation. Do not exceed 125 psig on resin storage tank pressure gauge.

2.4 Line up monitor tank pump to reactor makeup water header, throttle pump recire valve to maintain 125 psig on the reactor makeup water header.

2.5 If resin storage tank T112 pressure increases to 125 psig and holds, back flushing of the resin retention element on the vent line may be required.

2.6 The rubidum activity levels in the primary auxiliary building may i

increase during the spent resin flush if resin bed not off line for sufficient time to allow radioactive decay.

3.0 INITIAL CONDITIONS 3.1 Verify the following:

3.1.1 Verify the storage tank resin inlet and storage tank vent camlock connections are properly mated and securely wired into place.

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o OI-21 Page 2 3.1.2 Camlock female cap installed on the resin storage tank T112 rinse line (center penetration) with padlock installed.

3.1.3 Resin storage tank T112 discharge valve shut (WS-34) and padlock installed.

3.2 Perform the following valve lineup:

Position Initials CV-212(CV-223)

"A" ("B") mixed bed inlet.

S CV-213(CV-224)

"A" ("B") mixed bed resin fill S

CV-214(CV-222)

"A" ("B") mixed bed vent S

CV-216(CV-225)

"A" ("B") mixed bed outlet S

CV-373(CV-377)

"A" ("B") mixed bed outlet drain S

WL-1680 Spent resin to storage tank..

O WL-1681 RMW to storage tank vent connection S

WL-1697 Storage tank vent to WHUT.

O WL-1682 SA to storage tank resin inlet connection S

Cask air regulator isolation valves

...... Both Shut CV-390A RMW to ion exchanger O

CV-390B RMW to ion exchanger 0

Record demineralizer to be flushed Unit #

Demin. #

3.3 Health Physics perform a survey of ion exchanger to be dumped to get initial readings.

Contact General Area 3.3.1 Permission to sluice resin to storage tank obtained from radioactive waste coordinator who was advised of the above contact reading.

3.4 If the resin being dumped is routed to the resin storage tank via the south dump header, a contact reading of the north header should be taken in the overhead of the north i

passageway before dumping. After dumping, an increased contact reading at this same location is indicative that the north header also needs flushing due to resin carrying j

on past resin storage tank.

I If dumping via north header, take contact reading on south header as explained above.

Opposite dump header contact readings:

Before dumping After dumping

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OI-21 Page 3 4.0 PROCEDURE Initia's 4.1 Pressurize the reactor makeup water header (reference Step 2.4).

4.2 Open CV-215 (CV-221),

"A" ("B") mixed bed resin dump valve.

CAUTION: THIS WILL ALLOW " HOT" RESIN TO FALL BY GRAVITY TOWARDS THE RESIN STORAGE TANK. RADIATION LEVELS WILL PROBABLY INCREASE.

4.3 Open valve CV-374 (CV-376), reactor makeup water to "A"

("B") mixed bed outlet line slowly to a flow rate of about 7-15 gpm while monitoring cask pressure. Do not exceed 125 psig at resin storage tank.

CAUTION: THE RESIN RETENTION ELEMENT ON THE VENT LINE IS LOCATED AT THE TOP OF THE RESIN STORAGE' TANK PROVIDING A MINIMUM AIR SPACE.

USE CAUTION WHILE FLUSHING WITH HIGH FLOW RATES TO PREVENT OVERPRESSURIZATION AND LIFTING THE TANK INTERNAL RELIEF VALVE.

l 4.4 As required by the radiation levels, vary the flow of the reactor makeup water CV-374 (CV-376) to flush the resin into the storage tank.

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4.5 When Chemistry indicates the mixed bed is empty, shut CV-374 (CV-376) and CV-215 (CV-221), "A" ("B") mixed bed resin dump valve. Lock CV-215 (CV-221).

Lock #

4.6 Open CV-372 (for Unit 1 or 2 as appropriate) reactor makeup water to spent resin flush line, to flush out the l

line until Chemistry indicates the resin is all in the j

storage tank, then shut and lock CV-372.

1 Lock #

4.7 If a Unit I demineralizer is being dumped -

l l

4.7.1 At T108A&B (polishing demineralizers), check shut l

WL-1824 and WL-1823. Open WL-1840 and WL-1825 to flush out residual resin. Do not exceed l

125 psig on resin storage tank. Then shut WL-1840 and lock shut WL-1825.

Lock #

l

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l 4.7.2 At 1U12C (south evaporator feed demineralizer),

I open BS-1167A to flush residual resin out of the south dump header. Do not exceed 125 psig on resin storage tank. Then lock shut BS-1167A.

Lock #

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e OI-21 Page 4 Initials 4.8 If a Unit.2 demineralizer is being dumped -

j 4.8.1 Between U3A and U3C (evaporator condensate demineralizers), check shut BS-1219, 1BS-1221, BS-1235B and 2BS-1221. Open BS-1218 and BS-1231A to flush residual resin out of north dump header. Do not exceed 125 psig on resin storage tank. Then shut BS-1218 and lock shut t

.BS-1231A.

Lock #

l 1

4.9 Survey _all resin dump' lines to check for any stray resin.

l 4.10 Perform the following valve lineup:

WL-1680 Spent resin to storage tank.....

S WL-1697 Storage tank vent to WHUT.

O CV-390A RMW to ion exchanger S

l CV-390B-RMW to ion exchanger S

i

- 4.11 Obtain required resin volume and lot number from Chemistry laboratory.

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Volume ft3 Lot #

Chem. Supvr.

4.12 Recharge the demineralizer in the following manner.

I Do steps in order indicated.

I 4.12.1 Open CV-214 (CV-222) "A" ("B") demineralizer s

vent.

4.12.2 Open CV-373 (CV-377) "A" ("B") demineralizer drain.

t 4.12.3 After approximately 2-3 minutes, open then reclose CV-213 (CV-224) "A" ("B") demineralizer resin fill.

S 4.12.4 Remove resin fill connection flange and bolt recharge funnel into place.

4.12.5 When Health Physics is present to take a grab sample and low volume air particulate, open CV-213 (CV-224) "A" ("B") demineralizer resin fill. Use demineralized water and begin recharging demineralizer.

CAUTION: ENSURE ALL PERSONNEL INVOLVED IN RECHARGING

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OPERATIONS HAVE POCKETS TAPED, GLASSES SECURED, ETC.

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OI-21 Page 5

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Initials 4.12.6 After sluicing approximately two-thirds of the required resin into the demineralizer, shut CV-373 (CV-377) "A" ("B") demineralizer drain.

4.12.7 Sluice the remaining resin into the demineralizer and then shut CV-214 (CV-222)

"A" ("B")

demineralizer vent.

4.12.8 Fill the balance of the demineraliz'er tank volume from El. 46' until water is visable just above the resin fill valve.

4.12.9 Shut CV-213 (CV-224) "A" ("B") demineralizer resin fill.

4.12.10 Remove the recharge funnel and reinstall the blank flange utilizing a new flexitallic gasket.

4.12.11 Align the demineralizer per instructions of the Duty Shift Superintendent.

4.13 Place the reactor makeup water supply to the condition as required by the Duty Shift Superintendent.

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