ML20204H507
| ML20204H507 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 11/18/1983 |
| From: | WISCONSIN ELECTRIC POWER CO. |
| To: | |
| Shared Package | |
| ML20204H448 | List:
|
| References | |
| OI-27, NUDOCS 8411120306 | |
| Download: ML20204H507 (6) | |
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Date OI-27 OPS Supervisor MINOR
' Chem Lab Records Revision 6
, Updated 11-18-83 OPS Office Records Updated e
CATION BED DEMINERALIZER RESIN FLUSH & RECHARGE 1U9 & 2U9
,1.0 PMRPOSE 1.1 To sluice the spent resin out of the cation 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 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 operction. 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 canloc.k 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.
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3.2 Perform the following valve lineup:
Position Initials ICV-246 (2CV-246) 1U9 (2U9) cation bed inlet.
IU9 (2U9) cation resin fill S
,1CV-378 (2CV-378) 1U9 (2U9) cation bed vent S
'1U9 (2U9) cation bed outlet S
ICV-380_(2CV-380) 1U9 (2U9) cation bed outlet drain S
E-1680 Spent resin to storage tank 0
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. E-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 Storage tank' air regulator isolation valves....... Both Shut ICV-390A (2CV-390A) RMW to ion exchanger.......
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~ ICV-3908 (2CV-390B) RMW to ion exchanger.
0 Record demineralizer to be flushed 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 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 du:np header contact readings:
Before dumping After dumping e
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4.0 PROCEDURE Initials 4.1 Pressurize the reactor makeup water header (reference Step 2.4).
4.2 Open ICV-382 (2CV-382) cation 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 valve ICV-381 (2CV-381), reactor makeup water to the cation bed outlet line slowly to obtain a flow rate of 7-15 gpm as necessary to flush the resin to the storage tank. Do not exceed 125 psig at the 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 OVER-PRESSURIZATION AND LIFTING THE TANK INTERNAL RELIEF VALVE.
4.4 As required by the radiation levels, vary the flow of the
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resin into the storage tank.
reactor makeup water valve ICV-381 (2CV-381) to flush the 4.5 When Health Physics indicates the cation bed is empty, shut ICV-381 (2CV-381) and ICV-382 (2CV-382) cation bed resin dump valve. Lock 1CV-382 (2CV-382).
Lock #
4.6 In primary demineralizer valve gallery NW (SE), open 1CV-372 (2CV-372) to flush out residual resin. Do not exceed 125 psig on resin cask liner. Then shut apd lock 1CV-372 (2CV-372).
Lock #
4.7 If IU9 being' dumped -
4.7.1 At T108A&B, (polishing demineralizer), check shut WL-1824 and WL-1823. Open WL-1840 and WD-1825 to flush out residual resin. Do not exceed 125 psig on resin storage tank. Then shut them and lock WL-1825. Lock #
4.7.2 At 1U12C, south evaporator feed demineralizer,
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open BS-1167.'. to flush residual resin out of
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south dump header. Do not exceed 125 psig on resin storage tank. Then shut and lock BS-1167A.
Lock #
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OI-27 Page 4 7-Initials 4.8 If 2U9 being dumped -
4.8.1 Between U3A and U3C, (evaporator condensate domineralizers), check shut BS-1219, 185-1221, BS-1235B & 285-1221. Open BS-1218 and BS-1231A to flush residual resin out of north dump header.
4 Do not exceed 125 psig on resin storage tank.
Then shut them and lock BS-1231A.
1 Lock #
4.9 Survey all resin dump lines to check for any stray resin.
4.10 Perform the following valve lineup:
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WL-1680 Spent resin to storage tank S
WL-1697 Storage tank vent to WHUT 0
1CV-390A (2CV-390A) RNW to ion exchangers S
1CV-390B (2CV-390B) RNW to ion exchangers S
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4.11 Obtain required resin volume and lot number from Chemistry laboratory.
Volume ft3 Lot #
Chem. Supvr.
l 4.12 Recharge the demineralizer in the following manner.
l Do steps in order indicated.
f 4.12.1 Open ICV-378 (2CV-378), domineralizer vent.
4.12.2 Open 1CV-380 (2CV-380), demineralizer drain.
l 4.12.3 After approximately 2-3 minutes, open'then reclose the selected domineralizer resin fill valve ICV-220 (2CV-220).
4.12.4 Remove resin fill connection flange and bolt recharge funnel into place.
1 4.12.5 When Health Physics is present to take a grab sample and low volume air particulate, open 1CV-220 (2CV-220), domineralizer resin fill.
Use domineralized water and begin recharging demineralizer, a
k CAUTION: ENSURE ALL PERSONNEL INVOLVED IN RECHARGING OPERATIONS HAVE POCKETS TAPED, GLASSES k
SECURED, ETC.
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Initials 4.12.6 After sluicing approximately two-thirds of the required resin into the demineralizer, shut ICV-380 (2CV-380) demineralizer drain /
backflush.
4.12.7 Sluice the remaining resin into the demineralizer and then shut ICV-378 (2CV-378) demineralizer vent.
4.12.8 Fill the balance of the demineralizer tank volume from El. 46' until water is visable just above the resin fill valve.
4.12.9 Shut ICV-220 (2CV-220), 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.
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4.13 Place the reactor makeup water supply to the condition as required by the Duty Shift Superintendent.
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