ML20204H489

From kanterella
Jump to navigation Jump to search
Rev 6 to Procedure OI-26, Deborating Demineralizer Resin Flush & Recharge 1U2A(B) & 2U2A(B)
ML20204H489
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-26, NUDOCS 8411120304
Download: ML20204H489 (6)


Text

"

i ff v Date 01-26 OPS Supervisor MINOR Chem Lab Records Revision 6 Updated 11-18-83 l OPS Office Records Updated DEBORATING DEMINERALIZER RESIN FLUSH & RECHARGE 1U2A(B) & 2U2A(B) 1.0 PURPOSE 1.1 To sluice the spent anion resin out of the deborating ion exchangers.

1.2 To recharge the selected demineralizer with fresh resin. I 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 No unauthorized work near the sluice line during the evolutica.

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.

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.

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.

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. .

8411120304 841105 i l

PDR ADOCK 05000266 PDR p

J

~

OI-26 1 ~ Page 2 3.2 Perform the following valve lineup: Position Initials CV-235 RMW/U2A&B drains to WHUT . . . .. S CV-227B(226B) Deborating demineralizer inlet .

S

.CV-227A(226A) Deborating demineralizer inlet . S

~

CV-237A(238A) Deborating demineralizer outlet S CV-237B(2388) Deborating demineralizer outlet S

. CV-228 NaOH to ion exchangers . . ... S CV-232 RMW to ion exchanger inlet . .. S CV-230A NaOH to.U2A inlet .... . .. S CV-230B NaOH to U2A outlet . ... . .. S CV-234A RMW to U2A outlet ..... .. S CV-234B RMW to U2B outlet ..... .. S CV-233 RMW to U2A&B outlet .... .. S WL-1680 Spent resin to storage tank .. O RMW to storage tank vent WL-1681 connection . . . . . . . . .. S

, WL-1697 _ Storage tank vent to WHUT ... O i

WL-1682 SA to storage tank resin inlet connection . .. . .... .. S Isolation valves to storage tank air regulator . ..... .. S CV-390A RMW to ion exchangers ..... 0

$ CV-390B RMW to ion exchangers ..... O Record demineralizer(s) to be flushed Unit Demineralizer 3.3 Health Physics perform a survey of ion exchanger to i 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 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:

Before dumping After dumping l

0I-26 Page 3 I

4.0 PROCEDURE Initials 4.1 Pressurize the reactor makeup water header (reference Step 2.4).

4.2 Open CV-242 (243), U2A (U2B) resin dump valve.

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

4.3 Open CV-234A (234B), reactor makeup water to ion exchanger outlet.

4.4 Throttle CV-233 to get back flow through the ion exchanger. Vary the flow as necessary to flush out the resin. Continue to flush at approximately 7-15 gpm while monitoring 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 WHILE

. FLUSHING WITH HIGH FLOW RATES TO PREVENT

( OVERPRESSURIZATION AND LIFTING THE TANK INTERNAL RELIEF VALVE.

NOTE: IF NECESSARY, FLOW MAY BE DIRECTED TO THE TOP OF THE ION EXCHANGER VIA CV-232 AND CV-230A (230B).

4.5 When Chemistry indicates the bed is empty, shut CV-233 and CV-234A (234B) RMW supply, and CV-242 (243) resin dump valve. Lock CV-242 (243). Lock #

4.6 Flush out the resin dump header, and then survey as necessary to clear the lines of any stray resin. Monitor resin storage tank pressure while flushing the following lines. Do not exceed 125 psig.

4.6.1 If a Unit 1 demineralizer being dumped -

a. In primary demineralizer valve gallery (NW) open ICV-372 to flush out residual resin.

Then shut and lock 1CV-372.

Lock #

, b. At T108A&B, (polishing demineralizer), check shut WL-1824 and WL-1823. Open WL-1840 t and WD-1825 to flush out residual resin.

i

.' Then shut them and lock WD-1825.

. Lock #

OI-26 Page 4 Initials

c. At 1U12C, south evaporator feed demineralizer, open BS-ll67A to flush residual resin out of south dump header. Then shut and lock BS-1167A.

Lock #

4.6.2 If a Unit 2 demineralizer being dumped. Between U3A and U3C, (evaporator condensate demineralizer),

check shut BS-1219, 1BS-1221, BS-1235B & 2BS-1221.

Open BS-1218 and BS-1231A to flush residual resin .

out of north dump header. Then shut them and lock BS-1231A. Lock #

4.7 Perform the following valve lineup:

Spent resin to storage tank WL-1680 ... S WL-1697 Storage tank vent to WHUT . . .. O CV-390A RMW to ion exchangers . . . ... S CV-390B RMW to ion exchangers . ... .. S 4.8 Obtain required resin volume and lot number from Chemistry laboratory.

Volume ft3 Lot #

Chem. Supvr.

4.9 Recharge the demineralizer in the following manner.

Do steps in order indicated.

4.9.1 Open CV-395 (CV-396), demineralizer vent.

I 4.9.2 Open CV-235, RMW/U2A&B drain to WHUT.

l 4.9.3 Open CV-234A (CV-234B), demineralizer drain /

backflush.

4.9.4 After approximately 2-3 minutes, open then l reclose the selected demineralizer resin fill
valve CV-240 (CV-241).

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

4.9.6 When Health Physics is present to take a grab sample and low volume air particulate, open CV-240 (CV-241), demineralizer resin fill. Use damineralized water and begin recharging demineralizer.

l r' CAUTION: ENSURE ALL PERSONNEL INVOLVED IN RECHARGING OPERATIONS HAVE POCKETS TAPED, GLASSES SECURED, ETC.

l

~'

F- ,

e 0 0I-26 Page 5 Initials 4.9.7 After sluicing approximately two-thirds of the required resin into the demineralizer, shut CV-234A (CV-234B), demineralizer drain /

backflush.

4.9.8 Sluice the remaining resin into the demineralizer and then shut CV-395 (CV-396), demineralizer vent.

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

4.9.10 Shut CV-240 (CV-241), demineralizer resin fill.

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

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

~

( 4.10 Shut CV-235, RMW/U2A&B drain to WHUT, and place the reactor makeup water supply to the condition as required by the Duty Shift Superintendent.

l

(

l

, /.* OI-26 g Pagn 6 RMW RMW -

er

( j [ BS-Il67 A BS 1231A  : 03C *4 as-ius: :

1012C IUl2A V6 03B iul2B 2012li

, , , , , r 9 , , , r ,

a s 6 a RMW "

n n .

n ... J P f _ .

In overhead of 1HX-11B # 8 In overhead of 2HX-11A RHR heat exchanger RHR heat exchanger cubicle cubicle

- - 9 P Unit 1 boric acid # # Unit 2 boric acid evaporator cubicle l u evaporator cubicle 1 r 9r 3 r 1 r , r J L JL d k d k J L 108 102A (109101A 101B IU2B 1 rWL 1825 04MiaJ h FWiH {.372.

"? .  :  ?:

,( .SA "B40 -@ IC RMN l-3908 l-390A 1-390A 2-390B RMY! ?  ?: @ '

p 2-37C 2.02 209 201A 2018 7.V r r , r , r , r .

' ' )

Unit 1 boric acid y Unit 2 boric acid evaporator cubicle p p -

evaporator cubicic g

Passage to No. 2 ' Passageway to No. 3 pipeway pipeway Unit I non-regenerative f - -

Unit 2 non-regenerativ LEAD SHOT SHIELD heat exchanger cubicle,., , . . . . . , . . .

eat exchanger cubici c...... -.w a -

... . . @c Q...~lG80g~r.-

L w e. ~ ..-w.

OPI M ~. M M 7 , > < N RMW SA. ~ 1 2: 1 'M Md !;lssi -

1681 ~ U 2EU e VENT To W.H.U.T.

n :: 1697

[NoSF. 7 vert.R H

, i

) ,

! T-ll 2. ,

SPENT RESIN 'i SToR AGE tar 4 K H LJ

[ WS . - - - - . _ . - - - - - . _. . . - - . - . _ _ . _ _ . - - - . - . - - . , . _ . . , . . . _ _ . _ _ . - - - - . - - - . -