ML20204H461

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Rev 5 to Procedure OI-19, Spent Fuel Pit Demineralizer Resin Flush & Recharge,U6
ML20204H461
Person / Time
Site: Point Beach  NextEra Energy icon.png
Issue date: 11/18/1983
From:
WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML20204H448 List:
References
OI-19, NUDOCS 8411120298
Download: ML20204H461 (5)


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  • OI-19 OPS Supervisor MINOR Chem Lab Records Revision 5 i

s Updated 11-18-83 OPS Office Records Updated SPENT FUEL PIT DEMINERALI~.ER RESIN FLUSH & RECHARGE, U6 1.0 PURPOSE 1.1 To sluice the spent resin out of the spent fuel pit demineralizer (UG).

1.2 To recharge the demineralizer with fresh resin.

2.0 PRECAUTIONS & LIMITATIONS  ;

i 2.1 Have Health Physics monitor the demineralizer (contact and general [

area) prior to start of sluice. Monitor the El. 26' & El. 8' level l of the auxiliary building after completion of the sluice. j i

2.2 No unauthorized work near the sluice line during the evolution.  ;

( 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 recirc valve to maintain 125 psig on the reactor makeup water header.

l 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. l 3.0 INITIAL CONDITIONS I 3.1 Verify the following: h 3.1.1 Verify the storage tank resin inlet and storage tank vent, camlock connectors are properly mated and securely wired into place.

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.

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, ,5 iv OI-19 Page 2 4

3.2 Perform the following valve lineup: Position Initials 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 SF-804B Inlet, U6 . . . . . . . ....... 5 SF-801 Outlet, U6 ............. S SF-795 Alt., U6, inlet from P33 ...... S SF-798A DH, U6, vent ............ S SF-7988 DH, U6, drain . . . . . . . . . . . . S SF-799 Resin fill to U6 ........... S 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 l who was' advised of the above contact reading. l 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 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 on past resin storage tank.

If dumping via north header, take contact reading on south

-header as explained above.

Opposite dump header contact readings:

    • n Before dumping After dusping 4.0 PROCEDURE 4.1 Pressurize the reactor makeup water header (reference l Step 2.4).

4.2 Open SF-800, resin dump valve on U6.

CAUTION: CONTAMINATED RESIN WILL FALL BY GRAVITY INTO THE RESIN DUMP LINE.'

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0I 19 Page 3

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Initials 4.3 Commence flush by cracking open valve SF-802 allowing reactor makeup water to enter U6. Vary the flow using this valve as required to flush the resin into the storage tank. Monitor resin storage tank pressure; do not exceed 125 psig.

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 WHEN FLUSHING WITH HIGH FLOW RATES TO PREVENT OVERPRESSURIZATION AND LIFTING THE TANK IN'IERNAL RELIEF VALVE.

4.4 continue flushing until Chemistry determines the U6 resin bed to be empty. Then close valve SF-802, reactor makeup water to U6, and SF-800, resin dump valve, lock shut SF-800.

Lock No. ,

L 4.5 Flush the resin dump header. Then survey all resin .

( flush lines to check for any stray resin.

4.5.1 At 1U12C, south evaporator feed domineralizer, k open BS-1167A to flush residual resin out of  !

south dump header. Do not exceed 125 psig on l resin storage tank. Then shut and lock BS-1167A.

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Lock No.  ;

4.6 Perform the following valve lineup:  !

WL-1680 Spent resin to storage tank ..... S WL-1697 Storage tank to WHUT . . ....... 0 4.7 Obtain required resin volume and lot number from chemistry laboratory.

Volume ft3 Lot #

Chem. Supvr.

4.8 Recharge the damineralizer in the following manner. Do steps in order indicated.

4.8.1 Open SF-798A, demineralizer vent.

4.8.2 Open SF-7988, demineralizer drain.

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4.8.3 After approximately 2-3 minutes, open then reelose SF-799 resin fill valve.

4.8.4 Remove resin fill connection flange and bolt recharge funnel into place. _ _ _ - __ - - - _ -_ _ -_ _ -

OI-19 i Page 4

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Initials 4.8.5 When Health Physics is present to take a grab sample and low volume air particulate, open SF-799, domineralizer resin fill. Use dominera-j' lized water and begin recharging domineralizer.

CAUTION: INSURE ALL PER$0lefEL INVOLVED IN RECHARGING OPERATIONS HAVE POCKETS TAPED, GLASSES SECURED, ETC.

4.8.J After sluicing approximately two-thirds of the required resin into the domineralizer, shut l

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SF-7988, domineralizer drain.

4.8.s Sluice the remaining resin into the demineralizer and then shut SF-798A, demineralizer vent.

, 4.8.8 Fill the balance of the domineralizer tank volume from El. 46' until water is visable just above the resin fill valve.

4 4.8.9 Shut SF-799, oenineralizer resin fill.

4.8.10 Remove *the recharge funnel and reinstall the blank flange utilizing a new flexitallic gasket.  !

4.8.11 Align the domineralizer per instructions of the Duty Shift Superintendent.

i 4.9 Place the reactor makeup water system in the condition required by the Duty Shift Superintendent.

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