ML20138K299
| ML20138K299 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 01/31/1997 |
| From: | WISCONSIN ELECTRIC POWER CO. |
| To: | |
| Shared Package | |
| ML20138K159 | List:
|
| References | |
| NUDOCS 9702180140 | |
| Download: ML20138K299 (33) | |
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY Urut RECORD Date PROCEDURE VERIFIED CURRENT AND CHECKED.*OR TEMPORARY CHANGES IF FE.LD COPIES REQUIRED. USE PDF 0026: LAW NP L2 4 AND DO HQI COMPLETE T1CS BLOCK BY:
DATE:
2 DISCUSSION This procedure provides the direction for draining the RCS without entering reduced inventory. Ifit is necessary to enter reduced inventory, OP-4D Pan 2 should be used.
This procedure details the required action to drain the RCS from a solid depressurized condition to a panially drained condition (>55% RV level). In this procedure, reactor coolant is pumped via the RHR system and the letdown diven ponion of the CVCS to a CVCS HUT. A nitrogen backfill of the RCS is employed to fill the voided areas in the RCS eliminating O contact and as a controlled vacuum break of 2
the coolant captive in each steam generator tube hundle. This section is in concen with, and a sequel to, OP-3 C.
A DRAINING THE RCS TO A CVCS HUT D)
,V 1.0 PURPOSE 1
This procedure provides operator guidance in:
l.1 Draining the RCS via the RHR and letdown diven system to a CVCS HUT 4
l.2 Nitrogen backfilling of the RCS to maintain a slightly positive pressure in the RCS.
1.3 Preparing the RCS for a containment integrated leak rate test.
1.4 Steam generator tube bundle vacuum breaking and a controlled letdown of coolant therein.
1.5 Inventorying the amount ofreactor coolant drained as a check on reactor vessel water levelindication.
I 1.6 Purging and isolating the RCDT from the vent header and the gas analyzer.-
1.7 Aligning the letdown, purification, and charging system from RHR for a drained down operating mode.
9702180140 970210 Page1 of33 REFERENCE USE PDR ADOCK 05000301 P
PDR 3 3
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY
2.0 REFERENCES
IR 96-006, NRC Inspection Report; NRC Commitment for Operations procedures PMT/QC reviews.
3.0 PRECAUTIONS AND LIMITATIONS NOTE:
Asterisk (*) indicates a TechnicalSpecification requirement 3.1
- Both RHR trains shall be operable when RCS temperature is <140 F. One train at a time may be temporarily out of service for surveillance requirements.
NOTE:
The RCS is open to the atmosphere when any one ofthefollowing conditions is satisfied:
At least oneprimary manway is removed a.
b.
One PORVis maintained open.
c.
The reactor vesselheadis unbolted d
One pressurizer safety valve is removed 3.2*
When the RCS is <360 F and not open to the atmosphere, the LTOP system must be operable and enabled.
3.3
- When the RCS is not open to the atmosphere and either cold leg temperature is s275*F, no more than one high head SI pump shall be operable. The inoperable pump shall have its associated 4160 volt breaker racked out or its discharge valve shut and operator power removed.
3.4 Observe the applicable Health Physics procedures for handling radioactive liquids and for venting vapors and gases. Special precautions are required when the VNPSE system is j
not operating as in the preparation of the RCS for a containment ILRT by purging the PRT to a lower acceptable level of H and radgas concentration.
2 35 Reactor vessel level must be maintained 23/4 pipe corresponding to 222% on LI-447/LI-447A to ensure reliable operation of the RHR system.
3.6 Concurrence of the DSS and the DCS is required to lower reactor vessel level to
<3/4 pipe. In no case will reactor vessel level be lowered intentionally to <l/2 pipe, corresponding to <l4.5% on LI-447/LI-447A, when fuel is in the core.
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTOliY 3.7 Reactor vessel level instruments, LT-447/LT-447A, are pressure sensitive. Ensure that each transmitter is thoroughly purged ofliquid in the reference leg and air in the variable leg prior to placing it in service.
3.8 When the local level indicator, L1-447B, is used to indicate reactor vessel level, the RCS must be depressurized to containment atmospheric pressure to obtain an accurate level indication. Iflevel is below 55%, seal injection must be secured to the B RCP-Unit 1 (A RCP-Unit 2).
3.9 The RVLIS must not be used for definitive reactor vessel level indication. It should be used to verify level trends on the associated recorder especially when level is in the blind spot from off scale low on pressurizer level to on scale high on LI-447/LI-447A.
3.10 Insplement OP-4F prior to commencin8 the draining of the reactor coolant system (except for verification of single train decay heat removal which is contained within the body of this procedure). OP-4F is required to be in effect prior to draining the RCS to <55% as indicated on LI-447/447A. This level is ~3' below the reactor vessel flange.
3.11 Prior to opening or allowing maintenance on the RCS, verify single train RHR decay heat O.
removal capability to maintain the RCS at s the desired temp at s the specified RHR flow
)
(
rate. When performing the demonstration, CCW flow shall be established through only one RHR heat exchanger. The CCW flow rate through the RHR heat exchanger selected may be increased to the design flow rate (per local plaque) and the service water flow through the CCW heat exchanger (s) should be set at ~4 psid.
3.11.1 For a refueling shutdown, demonstrate the ability of one train of RHR to maintain the RCS at sl40 F at sl500 gpm RHR flow, l
3.11.2 For a cold shutdown, demonstrate the ability of one train of RHR to maintain the RCS at sl60 F at sl500 gpm RHR flow.
3.12 If, during the performance of this procedure RHR cooling becomes impaired or lost, reduce RHR flow to 1000 gpm t!00 gpm, secure draining and proceed to SEP-1 degraded RHR system capability.
3.13 Do not cooldown while @ 3/4 pipe without first increasing the reactor vessel level to compensate for the change in water density.
/O V
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NUCLEAR POWER BUSINESS UNIT OP 4D PART I OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTEPJNG REDUCED January 31,1997 INVENTORY INITIALS 4
INITIAL CONDITIONS s
4.1 The RCS is solid and depressmized.
4.2 The reactor has been shutdown for >65 hours or the decay heat load has been demonstrated to be within the heat removal capability of a single train of RHR to maintain the unit at cold shutdown (<200 F). For demonstrating single train capability, RHR flow should be $1500 gpm and 4
CCW flow through only one RHR HX.
4.3 RCS temperature is being maintained:
For a cold shutdown sl60 F, or For a refueling shutdown <l40*F, or For a containment ILRT 100-110 F 4.4 1 Train of RHR is in operation and with flow set at 1500 gpm i 100.
O 4.5 The letdown gas stripper is offline.
4.6 Letdowri alignment is in the degas mode bypassing the VCT inlet.
4.7 The equivalent of one empty CVCS HUT is available to store the reactor coolant-4.8 An equivalent of I W GDTs gas storage space is available.
4.9 The waste gas system is operable.
4.10 The nitrogen supply system is available.
l 4.11 The containment purge supply and exhaust system is operating, except when a containment ILRT is planned.
4.12 A one-inch hose is installed between the PRT at RC-590 and the purge exhaust fan suction as in Figure 1. (Figure 1 A) 4.13 Isotopic chemical analysis of the RCS indicates that the concentration of radioisotopes is within an acceptable level for draindown.
l l
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997
..O INVENTORY
\\'j INITIALS 4.14 The PRT gas space is:
4.14.1 s10% H for a normal RCS draindown 2
OR l
4.14.2 54% H2 and six10E'3pc/cc Xe-133 for draindown prior to an ILRT.
4.15 Any restrictions on the number of operable charging pumps per REI 19.0 is met.
NOTE:
As a good operatingpractice, OP-4Fis to be implementedprior to commencing draindown. OP-4Fis required to be implementedprior to entering reducedinventary.
4.16 Implement OP-4F, " Reactor CoUlant System Reduced Inventory p
Requirements" except for single train decay heat removal capability at Q
1500 gpm which will be performed in this procedure.
5.0 PROCEDURE 5.1 Verify pressurizer spray valves, RC-431 A&B, are open L
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NUCLEAR POWER BUSINESS UNIT OP 4D PART I OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 j
A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 l
INVENTORY INITIALS NOTE 1: In loop valves will bepositioned by CL-4Dfor refueling shutdowns only. Not requiredfor coldshutdown unless steam generator tubes are to be drained NOTE 2: El. 66'for Unit 1; Pressurizer compartmentfor Unit 2.
NOTE 3: N/A when ILRTisplanned Leave valve open.
NOTE 4: Valveis normally lockedshut.
5.2 Position the following:
RC-545A A SG cold leg vent isolation (Note 1) Open RC-547A A SG hot leg vent isolation (Note 1) Open RC-546A B SG hot leg vent isolation (Note 1) Open RC-548A B SG cold leg vent isolation (Note 1) Open RC-571 Reactor head vent orifice bypass Open RC-572 Reactor head vent orifice bypass Open RC-576 Pressurizer vent ori6ce bypass (Note 2) Open h
RC-577 Pressurizer vent orifice bypass (Note 2) Open RC-575C Manualisolation ofRC-575B (Note 3) Shut RC-584 Gas vent to low pressure fill & vent (Note 4) Open RC-583 Gas Vent to PRT relief header isolation Shut RC-585 Low pressure fill and vent PRT isolation Open RC-595 Nitrogen to PRT isolation Open RC-441(PCV) PRT nitrogen regulator 3-4 psi MOB No. 372 (482) RC-570A DC Breaker in 1C-20 Close (2C-20) j MOB No. 374 (484) RC-580A DC Breaker in 1C-20 Close (2C-20)
MOB No. 376 (486) RC-575A r Breaker in IC-20 Close (2C-20)
MOB No. 387 (497) RC-570B DC Breaker in 1C-20 Close (2C-20)
MOB No. 389 (499) RC-580B DC Breaker in 1C-20 Close (2C-20)
MOB No. 391 (501) RC-575B DC Breaker in IC-20 Close (2C-20)
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997
'eO INVENTORY U
INITIALS 5.2.1 Verify RC-589 shut.
Shut Then shut RC-532.
Shut 5.2.2 Verify the PRT N supply line is free ofliquid by:
2 Drain at RC-1420A, the low point drain down stream of a.
RC-528.
- b. When line is dry and N flow is verified, shut and cap 2
RC-1420A.
5.2.3 Open RC-532, N supply to PRT.
Open 2
5.2.4 Shut and red tag the PRT to gas analy2.er isolation valves RC-538 Red Tag Shut RC-539 Red Tag Shut 5.2.5 Rack out and red tag all pressurizer heater breakers.
5.3 Align letdown diven to the desired HUT.
Record: T8A, B, or C level at (Circle one) 5.4 Verify CV-112A, letdown divert valve, control switch in " AUTO."
i 4
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS NOTE:
PI-493 willindicate a 275" reference leg water column ~10psig when the RCS is at atmosphericpressure.
- CAUTIONa AN INDICATION OF <IO PSIG ON PI-493 IS AN INDICATION OF A VACUUM IN THE RCS. VERIFY N2 BACKFILL ALIGNMENT OR DECREASE THE DRAIN RATE. A NEGATIVE RCS PRESSURE WILL DISTORT THE CALIBRATION OF PRESSURIZER LEVEL INSTRUMENTATION.
5.5 Adjust letdown and/or charging flow until RCS pressure on PI-493 is 10-13 psig.
5.6 Open RCGVS valves to establish N backfill path.
2 RC-580A RCGVS pressurizer SOV Open RC-580B RCGVS pressurizer SOV Open RC-575A RCGVS PRT SOV Open 5.7 To commence drain of RCS:
5.7.1 Reduce charging to 1 pump at minimum speed.
5.7.2 Shut CV-142 to maintain normal RCP seal injection flow.
aCAUTIONa DO NOT EXCEED 40 GPM THROUGH THE CATION BED DEMINERALIZER. THROTTLE OPEN THE CATION BYPASS AS REQUIRED.
5.7.3 Adjust letdown flow to achieve desired drain rate by opening CV-135.
5.7.4 Verify CV-112A auto diverts as VCT level increases to the modulating level of-56%.
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS NOTE:
Steps 5.8 through 5.11 are N/A unless a containment ILRTis scheduled at the beginning ofa refueling outage 5.8 PZR Level for ILRT Secure RCS draindown when pressurizer level approaches 60% and stabilize level at 55-65% per LI-433, the pressurizer cold calibrated level indicator.
5.9 LTOP for ILRT 5.9.1 Mechanically block open RC-430 (or 431C) ?ORV.
5.9.2 Verify RC-516 (or 515), the associated POR v accx valve for the blocked open PORV, is maintained open.
5.9.3 Install red tags on the selected PORV and the selected PORV block valve control switches on C04.
5.10 Alinnment of RCS. PRT and RCDT for an ILRT 5.10.1 Shut RC-595, PRT N supply isolation.
2 5.10.2 Fill the RCDT from the PRT to a level of 95% while venting the RCDT to the VH. Adjust VH pressure to <2.0 psig 5.10.3 Shut and red tag:
WG-1786 Containment VH isolation Red Tag Shut WG-1787 Containment VH isolation Red Tag Shut WG-1788 RCDT/GA isolation Red Tag Shut WG-1789 RCDT/GA isolation Red Tag Shut 5.10.4 Open RC-527, PRT to VH AOV, and slowly pump the RCDT to a level ofs30% while observing a positive pressure in the PRT and RCDT during the pumpdown.
a iV Page 9 of33 REFERENCE USE i
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS 5.10.5 Depressurize RCDT, PRT and pressurizer to containment pressure by opening:
RC-586 Low pressure fill & vent PRT isolation Open RC-589 Low pressure fill & vent N supply Open 2
RC-590 Low pressure fill & vent PRT exhaust Open 5.10.6 When the system is depressurized:
a.
Shut RC-527 PRT to VH AOV Shut
- b. Then open WG-1609 RCDT local vent Open 5.10.7 Verify open RC-575C, RCGVS standpipe manual isolation, to permit remote venting of RCS during ILRT.
5.10.8 Continue with the preparation for the ILRT per ORT 9, then the ILRT per ORT 17.
5.11 Post-ILRT RCS. RCDT. and PRT Alignment to Resume Draindown 5.11.1 When N cylinders for RC-430 and 431C PORVs t.re 2
reconnected per ORT 10, then verify that the PORV N backup 2
system is aligned for LTOP service per CL-4C.
5.11.2 Verify the LTOP system is in service per the requirements of OP-3C, Section 4.9.
5.11.3 Remove the mechanical block open device on RC-430 (431C)
PORV installed in Step 5.9.
PMT 5.11.4 Stroke RC-430(431C) to verify valve moves without binding.
Timing is not required since mechanically blocking valve should not affect operability.
5.11.5 Shut RC-575C, RCGVS standpipe manualisolation.
Shut O
Page 10 of 33 REFERENCE USE
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 O
INVENTORY v
INITIALS 5.11.6 Shut the following valves at the PRT:
RC-586 Low pressure fill & vent PRT isolation Shut RC-589 Low pressure fill & vent N supply Shut 2
RC-590 Low pressure fill & vent PRT exhaust Shut 5.11.7 Verify open the following valves at the PRT:
RC-532 N supply to PRT Open 2
RC-585 Low pressure fill & vent PRT isolation Open RC-584 Gas vent to low pressure fill & vent Open 5.11.8 Reconnect the vent hose at RC-590.
5.11.9 Reinstall the pressure gauge at RC-441 N regulator.
2 n
5.11.10 Open NG-1662, N supply to containment.
Open 2
f 5.11.11 Vent the RCDT to the PRT:
a.
Shut WG-1609 RCDT local vent.
Shut
Open 5.11.12 To resume RCS draindown:
- a. Verify open:
RC-575A RCGVS PRT SOV Open RC-580A RCGVS pressurizer SOV Open RC-580B RCGVS pressurizer SOV Open 1
- b. Adjust RC-441, PRT N regulator, for a delivery pressure 2
of 3-4 psig.
Open RC-595 PRT N supply isolation.
Open c.
2 d
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NUCLEAR POWER BUSINESS UNIT OP 4D PART I OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS
- d. When PRT and pressurizer indicate a N overpressure of 2
3-4 psig, reduce charging flow to minimum to maintain normal RCP seal injection flow with CV-142 and maximize letdown flow by opening CV-135 as in previous steps of this procedure.
5.12 Purne of VCT Gas Soace 5.12.1 Adjust CV-114, VCT N regulator, to ~30 psig.
2 5.12.2 Purge the VCT gas space to the VH by allowing the VCT level to rise to 90-95%, then lower the level while backfilling with N2 5.12.3 Return CV-112A, letdown divert valve, control switch to
" AUTO" and verify that VCT level returns and controls at the auto divert setpoint of-56%.
5.12.4 Adjust CV-114, VCT N regulator to 20 p.sig.
2 5 13 When pressurizer level is <50% on LI-433 A, open the following valves to provide N backfill to the RV head-2 RC-570A Open RC-570B Open 5.14 When the pressurizer level indication is ~5% on LI-433 A, stop the draindown by reducing letdown flow to equd charging / seal injection flow.
5.15 Perform IT-700(705), " Inservice Test ofRCGVS Valves," if required.
5.16 Assign an SRO to oversee the remainder of the draindown operation until level is stabilized @ the desired level (but not s55%). The draindown operation will be his primary responsibility.
5.17 A senior line manager shall conduct a briefing for the Operations personnel involved in the draindown. It shall be given to each shift involved in the draindown until the draindown is complete and a stable level is achieved.
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 g
A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 Q
INVENTORY INITIALS 5.18 Place the reactor vessel level transmitters (LT-447/447A) in service as follows:
NOTE:
Narrow range RVLIS indication and recorder traces should be used to support the response ofRVlevelindicators, LI-447/Li-447A.
NOTE:
Reference Figure 1for Unit I and Figure 1A for Unit 2.
NOTE:
Reference HP 2.5.2for venting / draining ofsystems in contact with RCS.
NOTE:
RC-500B is not red tagged open dae to its location in the l
keyway with limitedaccess.
i NOTE:
RC-500N, RC-500P, RC-525C, and RC-525D are not red i
tagged to allowfor operationalflexibility to vent / purge transmitter and/or I& C testing (as required).
. OO 5.18.1 AT C-20 Red Tan Open the following valves:
RC-580A PZR vent isolation valve Red Tag Open RC-580B PZR vent isolation valve Red Tag Open RC-570A Rx vessel head vent Red Tag Open RC-570B Rx vessel head vent Red Tag Open 5.18.2 A! C-04 shut the following Do Not Red Tag:
RC-597 RV flange leakoff SOV Shut 5.18.3 At 21' Containment shut the following Do Not Red Tag:
9 RC-522 RV flange leakoff to drain tank Shut RC-525C LT-447 variable leg isolation Shut _
i RC-525D LT-447 reference leg isolation Stiut RC-500N LT-447A variable leg isolation Shut RC-500P LT-447A reference leg isolation Shut l
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 g
INVENTORY W
INITIALS 5.18.4 At 21' Containment Red Tan Shut RC-525 Reactor vessel level cross-connect isolation Red Tag Shut i
5.18.5 At the PRT shut the following Do Not Red Tag RC-587 LT-477 reference leg isolation to PRT Shut 5.18 6 At the PZR shut the following Do Not Red Tag SC-950B PZR steam space sample Shut 5.18.7 At the PZR Bed Tac Open the following:
RC-500Q LT-447A reference leg isolation Red Tag Open SC-950 PZR steam space sample isolation Red Tag Open RC-535 PZR to gas vent system isolation Red Tag Open
]
5.18.8 At the 66' Ul (PZR U2) Red Tan Open the following:
RC-576 PZR vent orifice bypass Red Tag Open RC-577 PZR vent orifice bypass Red Tag Open 5.18.9 At the 66' Red Tan Open the following:
RC-573 Reactor head vent isolation Red Tag Open RC-572 Reactor head vent orifice bypass Red Tag Open RC-571 Reactor head vent orifice bypass Red Tag Open RC-587A LT-447 reference leg isolation Red Tag Open RC-579 LT-447 reference leg isolation Red Tag Open RC-578 PZR vent isolation Red Tag Open 5.18.10 At the Reactor Head Red Tan Onon the following:
RC-500 Reactor head vent isolation Red Tag Open Page 14 of 33 REFERENCE USE e
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 b
INVENTORY v
INITIALS 5.18.11 At the 8' Red Tan Ooen the following:
4 RC-500D Reactor vessellevel variable leg isolation Red Tag Open RC-500J LT-447/447A variable leg isolation Red Tag Open RC-500K LT-447/447A variable leg isolation Red Tag Open 5.18.12 Place LT-447/447A in service as follows:
Drain LT-447 N side of allliquid via RC-525B 2
and verify a positive outflow ofN.
Drained i
2 Vent LT-447 liquid side of all gas via RC-525A and verify solid stream ofliquid.
Vented 1
p Verify LT-447 body vent and drain valves are shut.
Vent Shut d
Drain Shut Drain LT-447A N side of all liquid via RC-500M 2
and verify a positive outflow of N.
Drained l
2 Vent LT-447A liquid side of all gas via RC-500L and verify solid stream ofliquid.
Vented Verify LT-447A body vent and drain valves are shut.
Vent Shut j
Drain Shut RC-525D LT-447 reference leg isolation Open RC-525C LT-447 variableleg isolation Open NOTE:
Abruptly starting / stopping the venting / draining can adversely affect LT-447 calibration.
Complete the purge ofLT-447 by carefully venting /drainir.g the DP cell with the valves provided at the ceil.
RC-500P LT-447A reference leg isolation Open RC-500N LT-447A variable leg isolation Open Page 15 of 33
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS NOTE:
Abruptly starting / stopping the venting / draining can adversely affect LT-447A calibration.
Complete the purge of LT-447A by carefully venting / draining the DP cell with the valves provided at the cell.
5.18.13 Set the low level alarm setpoint for LC-447/447A @ 58%.
LC-447 @ 58%
LC-447A @ 58%
5.18.14 Set the high level alarm setpoint for LC-447/447A @ 100%.
LC-447 @ 100%
LC-447A @ 100%
5.18.15 Place the reactor vessel low level alarm bypass switch to ENABLE for LC-447/447A.
LC-447 Enable LC-447A Enable 1
f O
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NUCLEAR POWER BUSINESS UNIT OP 4D PART I OPERATING PROCEDiiRES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS NOTE:
Volume between pressurizer level off-scale low and R VLIS indicating a decreasing reactor vessellevelis approximately i200 gallons.
NOTE:
Volume between pressurizer level off-scale :ow and refueling level instrument (LI-447/LI-447A) on-scale high is approximately 2000 gallons.
a aCAUTIONa DO NOT DRAIN MORE THAN 3000 GALLONS FROM i
THE TIME PRESSURIZER LEVEL IS OFF-SCALE UNTIL LT-447/LT-447A IS ON-SCALE WITHOUT INVESTIGATING FOR THE DISCREPANCY.
- CAUTION
- IF DURING THE PERFORMANCE OF THIS i
EVOLUTION, RHR COOLING BECOMES IMPAIRED OR LOST, REDUCE RHR FLOW TO 1000 I00 GPM, t
SECURE DRAINING AND PROCEED TO SEP-1,
" DEGRADED RHR SYSTEM CAPABILITY."
5.19 Drain the RCS from just on scale on the pressurizer level instruments to on scale on the reactor vessel level instruments per the following steps:
5.19.1 Record the level in the HUT lined up to receive letdown
(
T8A,B,C (Circle One)
NOTE:
To maintain a constant charging and sealinjectionflow rate, i chargingpump operating at minimum speedis recommended 5.19.2 Establish the desired drainage rate by increasing letdown / reducing chargir.g flow.
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l NUCLEAR POWER BUSINESS UNIT OP 4D PART I OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS 5.19.3 Calculate when RVLIS should start trending down, when the reactor vessel level transmitters (LT-447/447A) should come on scale, and when 3000 gallons would be drained.
Record time when LI-433A goes off scale Letdown flow rate - (charging and seal injection) = drain rate in gpm 1200 + Drain Rate =
minutes for RVLIS to start trending 2000 + Drain Rate =
minutes for LT-447/447A to come on scale 3000 + Drain Rate =
minutes (max allowed per caution) 5.19.4 During the draindown, monitor for expected response from RVLIS and reactor vessel level transmitters. Use the IRJT level change as a backup to the calculated drainage time.
5.19.5 Perform a channel check of reactor vessel level instruments @
~90% reactor vessel level by comparing the 2 channels. Use computer addresses LT-447 and YXLT-447A, if available. If j
deviation between LI-447/447A is <3%, then indications are satisfactory.
If deviation between LI-447/447A is >3%, then perform another vent and purge ofLI-447/447A air and liquid sides.
If, after venting and purging LI-447/447A, they still do not agree within 3%, then notify I&C to perform a calibration check I
ofLI-447/447A before proceeding.
i 5.20 Continue draining to a level of 60% which corresponds to approximately 2M' below the RV flange, then:
NOTE:
Thefollowing step will minimize RCP sealinjectionflow.
Ensure the CVCSsystem stabilizes without VCTdivert 5.20.1 Secure the operating charging pump.
5.20.2 Place the VCT divert valve control switch to the VCT position.
5.20.3 Decrease letdown flow to equal total charging flow, g
Page 18 of 33 REFERENCE USE
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS I
5.20.4 Isolate the RCGVS from the PRT by shutting the following i
valves:
RC-585 Shut RC-589 Shut
- CAUTION
- THE FOLLOWING STEP WILL HAVE A DYNAMIC EFFECT ON THE INDICATED REACTOR VESSEL LEVEL (LT-447/447A). THE GREATER THE N PRESSURE IN THE RCS, 2
THE GREATER THE EFFECT. AS GAS IS BEING VENTED, LT-447 WILL INDICATE A
)
LEVEL INCREASE AND LT-447A WILL i
INDICATE A LEVEL DECREASE. IF IT IS NECESSARY TO CHECK REACTOR VESSEL LEVEL PRIOR TO COMPLETING THE VENTING OF THE RCS, THEN SHUT RC-586 OR RC-590, RCS PRESSURE SHOULD QUICKLY EQUALIZE, AND LT-447/447A SHOULD REFLECT ACTUAL LEVEL 5.20.5 Vent the RCGVS to the purge exhaust duct by opening the following valves:
RC-586 Open R.C-590 Open 5.21 Steam Generator Tube Bundle Drainine 5.21.1 Verify 3 to 4 psig N pressure in the PRT.
/
2 5.21.2 Record the following when the draindown is started:
Selected SQ IJsg HUT level %
Net Drain Rals A
apm B
apm Page 19 of 33 REFERENCE USE i
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NUCLEAR POWER BUSINESS UNIT OPERATING PROCEDURES OP 4D PART 1 MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO l
Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED INVENTORY January 31,1997 g
l W
1 INITIALS 5.21.3 Open RC-545C (548C), N supply to the A (B) steam 2
generator cold leg vent.
/
5.21.4 Allow RV level to rise to >80% on LI-447/LI-447A.
/
5.21.5 Place the VCT divert valve control switch to auto and establish a drain rate by increasing letdown flow with PCV-135 consistent with, but not greater than, the N2 backfill rate; i.e.,
LI-447/LI-447A stable or increasing.
/
5.21.6
(
Maintain a stable drain rate until RV level returns to 60% when draining the Ist S/G and ~ 70% when draining the 2nd S/G, then reduce letdown flow to equal total charging flow.
/
NOTE:
i The volume ofeach steam generator tube bundle is approximately 7000 gallons. For Unit 2, this volume must be adjusted based on thepercentage oftubesplugged Calculate and record volume drained as time vs. net drain rate O 5.21.7 and change in selected HUT level:
Drain rate Selected HUT A SE Ilms Volume HUT level %
Volume A
gal B
cal nal nal I
i 5.21.8 Shut RC-545C (548C) and repeat Steps 5.21.1 through 5.21.7 for the other steam generator.
5.22 Reduce PRT N supply regulator pressure to 1 psig.
2 O
Page 20 of 33 REFERENCE USE
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY i
INITIALS 5.23 Equalize pressure throughout the RCS loops by opening or verifying open all hot and cold leg vents:
545C Open 546C Open 547C Open 548C Open 5.24 RCDT Ali nment g
NOTE:
This section is N/A if the RCDT waspreviously alignedfor i
an ILRTperSection 5.10.
5.24.1 Fill the RCDT to approximately 95% level while venting to the vent header.
O 5.24.2 Red tag RCDT to vent header valves:
WG-1786 Red tag shut i
WG-1787 Red tag shut 5.24.3 Red tag shut RCDT to gas analyzer valves:
WG-1788 Red tag shut WG-1789 Red tag shut 5.24.4 Vent the RCDT to the PRT by opening and maintaining open RC-527.
5.24.5 Pump the RCDT to a normal operating level.
5.25 Secure RCP sealinjection by shutting:
CV-300A "A" RCP seal injection throttle valve Shut
,C CV-300B "B" RCP seal injection throttle valve Shut Page 21 of 33 REFERENCE USE
^
4
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 g
INVENTORY W
INITIALS
- CAUTION
- WHEN VENTING THE S/G CHANNEL HEADS TO CONTAINMENT ATMOSPHERIC PRESSURE, THE RCS LEVEL WILL DECREASE. MAINTAIN THE REACTOR VESSEL LEVEL AT THE DESIRED LEVEL BY: OPEN CV-112B CHG PUMP SUCTION FROM RWST, TEMPORARILY SECURING LETDOWN BY SHUTTING CV-135 LETDOWN PCV, AND UTILIZE A CHARGING PUMP TO MAINTAIN RV LEVEL AT THE DESIRED LEVEL DO NOT ALLOW RV LEVEL TO DECREASE TO <60% WHEN VENTING IS COMPLETE, RETURN THE LETDOWN AND CHARGING LINEUP TO AS FOUND.
5.26 Vent the RCS to containment atmospheric pressure.
5.26.1 Shut the PRT N supply valve RC-595.
Shut 2
NOTE:
Thepresence of water in the vent line may inhibit venting.
Checkfor water in the Tygon hose downstream ofRC-590.
Drain as necessary.
5.26.2 Vent the PRT and the RCS to the purge exhaust by opening RC-585.
Open 5.26.3 Ifit is desired to speed up the venting process, perform the following. If not required, N/A Steps a-e.
Open RC-589 to vent the PRT to the purge exhaust system.
a.
- b. Verify the head vent standpipe is drained via RC-588.
Open RC-575C standpipe manual isolation valve.
c.
- d. Open RC-575B standpipe solenoid valve at C-20.
O Page 22 of 33 REFERENCE USE t
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 y,
INVENTORY INITIALS When venting is complete, shut the following:
e.
RC-589 Shut RC-575C Shut RC-575B Shut NOTE:
Venpcation ofredundant decay heat removal capability is required on only the initial drain down aftershutdown. Ifvenpcation was previously completed at the specifiedflow rate and temperature, then N/A all ofstep 5.27.
5.27 Prior to opening or allowing maintenance on the RCS, verify single train (redundant) decay heat removal capability.
Verify redundant decay heat removal capability to maintain the RCS at s
(
the desired temperature at s the specified RHR flow. Reference Precaution and Limitations 3.11.
5.27.1 For a refueling shutdown, demonstrate the ability to maintain the RCS temperature s 140 F at si,500 gpm RHR flow as follows OR 5 27.2 For a cold shutdown, demonstrate the ability to maintain the RCS temperature s 160*F at s 1,500 gpm RHR flow as follows.
- a. If not previously done, reduce RHR trains to only one in operation.
- d. Set RHR flow to 1,500 gpm.
~
Page 23 of 33 REFERENCE USE 9
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 g
INVENTORY W
INITIALS e.
Shut the idle train's RHR HX CCW inlet valve CC-738A or CC-738B.
f.
If required, set the active train's RHR HX CCW throttle valve CC-824A or CC-824B at design flow (40 open).
- g. If required, set the CCW HX service water flow @ ~4 psid for the CCW HXs lined up to the unit shutdown.
NOTE:
Ifleakby is suspected on RH-626, the valve may be manually isolatedfor this test by shutting RH-714A or Rff-714B, the inlet or outlet isolation for Ril-626.
NOTE:
Ifleakby is suspected on the idle RHR loop HX flow control valve (RH-624 or RH-625), the idle train may be manually isolated by shutting RH-716A orRH-716B. A designatedoperatoris required to open tin valve in the event offailure ofthe active RiiR train.
- h. Verify that one train of RHR is able to maintain the RCS at s 140 F for a refueling shutdown (s 160 F for a cold shutdown).
5.27.3 Realign the RHR system.
Verify both RHR HX CCW throttle valves CC-824A and a.
CC-824B set at 30' open.
Verify open the idle RHR train's HX flow control valve c.
manual isolation RH-716A or RH-716B.
1
- d. Verify open the manual isolation valves for RH-626, RH-714A, and RH-714B.
O Page 24 of 33 REFERENCE USE
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 g
INVENTORY INITIALS Set RHR flow to 1,500 t 100 gpm and adjust RH-624, e.
RH-625, and RH-626 as required to maintain the desired temperature.
f.
If required, reduce service water flow through the CCW
]
Hxs to maintain the desired CCW/RHR temp.
5.28 Maintain RHR flow at 1000-1500 gpm.
NOTE:
The locallevelindicator, LI-447B, should only be valved in when taking a reading. After taking a reading it should be valved out by i
shutting RC-522A.
1 NOTE:
There is a 31/2" offset between the indicator on LI-447B and actual level The scale on LI-447B is set to accountfor this so level can be read directlyfrom the scale. Ifa Tygon tube is used to measure
{
level, you must use the sqpe on the wall y subtract 31/2" ifyou use l
the scale attached to LI-447B.
l NOTE:
RC-524 should have been opened during theperformance of CL-4D or CL-4D Appendix A andsealinjection to RCPs should have been securedin previous Step 5.25.
5.29 Place the reactor vessel level local indicator LI-447B in service by securing seal injection to B RCP Unit 1 (A RCP Unit 2) and opening RC-524, RC-523, and RC-522A.
NOTE:
Abmpt starting / stopping the venting / draining ofLT-447/LT-447A can adversely affect their calibration.
5.30 With RCS at atmospheric pressure, compare LI-447/447A indicated level to local level. Reference attached Table I for level cross reference values.
Use computer addresses LT-447 and YXLT-447A if available.
5.30.1 If LI-447B agrees with LI-447/447A within 3% (3"), then indications are satisfactory.
5.30.2 If LI-447B does not agree with LI-447/447A within 3% (3"),
1 then vent and purge the air and liquid sides of LI-447/447A.
.p 1
Page 25 of 33
. REFERENCE USE e
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS 5.30.3 If, after venting and purging LI-447/447A, they still do not agree with LI-447B, with 3% (3"), then request I&C to perform a calibration check ofLI-447/447A.
5.31 Valve out LI-447B by shutting RC-522A.
Shut 5.32 RHR Letdown and Chargine Valve Alienment NOTE:
Letdownflow controlshould be with CV-135. RHR letdown isolation valves, RH-71SC and CV-369A should be wide open and not usedas throttle valves.
NOTE:
A normalchargingpath through atleast one chargingpump should be maintained when the charging pumps are securett 5.32.1 Verify letdown flow is bypassing the VCT as follows:
CV-110B Open CV-110C Open CV-256A VCT Inlet Isolation Shut 5.32.2 Position the letdown divert valve, CV-l l2A, to the "VCT" position.
NOTE:
If a horation of the RCS is to beperformed, then N/A the following step because it will be completed after borating.
5.32.3 Shut CV-256B, divert manual isolation valve.
Shut 5.32.4 Disable the VCT auto makeup feature with the " Reactor Makeup" switch.
5.32.5 Fully open charging flow control valve, CV-142.
5.32.6 Secure any operating charging pumps.
O Page 25 of 33 REFERENCE USE
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IFTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 p
INVENTORY INITIALS NOTE:
Interlock between CV-112B&Cprevents the closure of the VCToutlet, CV-112C, unless the emergency makeup, CV-112B, is notfully closed 5.32.7 Shut the VCT outlet MOV CV-112C as follows:
- a. Momentarily open CV-112B.
- b. Shut CV-112C.
c.
Shut CV-ll2B.
5.32.8 Adjust CV-1.'5 for the desired purification flow rate.
5.32.9 Verify that 1:tdown flow equals charging flow by control board indication.
NOTE:
Ifboration ofthe RCS he been completed or is not required, t
then N/A steps $33.1 through 5.33.13.
5.33 Borate the RCS and RHR system to a refueling shutdown concentration, if required, using the following method.
5.33.1 Determine the total gallons of boric acid required to raise RCS boron concentration from the present value to 2000 ppm using the 300 F blender table.
Present Boron Conc.
ppm Vo =
gal.
5.33.2 Calculate an adjusted volume (V ).
i 3.75 Vi = 0.52 x x%
Can Where CBAT s the present boric acid concentration in % of the i
BAT to be used.
V=
gal.
i 4
Page 27 of 33 REFERENCE USE
NUCLEARPOWER BUSINESS UNIT OP 4D PART I OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS 5.33.3 Align the auxiliary charging line for service, then open auxiliary charging valve, CV-1296, and shut normal charging valve, CV-1298.
NOTE:
Recordthefollowing:
BAT START LEVEL BORIC ACID TOTALIZER START gal.
NOTE:
Allow reactor vessellevel to increase while borating the RCS.
5.33.4 Borate V gallons ofboric acid to the RCS while maintaining at i
least a two-to-one ratio ofletdown flow to boric acid flow.
NOTE:
Recordthefollowing:
BAT STOP LEVEL BORIC ACID TOTALIZER STOP gal.
5.33.5 Operate each RHR train, individually or simultaneously, for at least 30 minutes after boration to equilibrate the RCS wiih the RHR system.
5.33.6 Sample the RCS for current boron concentration.
Ppm 5.33.7 Ifrequired, and using V as a guide, add additional boric acid to i
bring RCS/RHR system to >2000 ppm.
gal.
5.33.8 Return to the normal charging path and secure auxiliary charging.
O Page 28 of 33 b
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997
(
INVENTORY INITIALS
- CAUTIONa IF, DURING THE PERFORMANCE OF THIS EVOLUTION, RHR COOLING BECOMES IMPAIRED OR LOST, REDUCE RHR FLOW TO 1000 t100 GPM, SECURE DRAINING AND PROCEED TO SEP-I, " DEGRADED RHR SYSTEM CAPABILITY."
5.33.9 Adjust RHR flow to 1500 i100 gpm.
5.33.10 Drain the RCS to desired level (but not s55%) on L1-447/L1-447A, by diverting to the HUT via CV-112A and controlling divert rate with CV-135.
5.33.11 When at desired level (but not 555%), position CV-112 to the VCT position and shut divert line manual isolation, CV-256B.
5.33.12 ~ Maintain RHR flow at 1000-1500 gpm.
5.33.13 Adjust letdown flow with CV-135 to obtain the desired purification flow. Verify that letdown flow equals charging flow by control board indication.
5.34 Set the reactor vessel level high alarm 3% above actual level for LC-447/447A.
LC-447 3% above actuallevel LC-447A 3% above actuallevel 5.35 Shut / check shut boric acid flow control valve CV-110A by placing the control switch on C04 in the close position.
5.36 Shut the S/G channel head vents to the PRT:
RC-545C Shut RC-546C Shut RC-547C Shut RC-548C Shut Page 29 of 33 REFERENCE USE.
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY INITIALS 5.37 After Maintenance has removed:
Reactor head vent system spoolpiece AND Blank flange between RC-576 and RC-577 Then clear the red tags and shut the following valves:
RC-570A Reactor vessel head vent solenoid valve RC-570B Reactor vessel head vent solenoid valve RC-580A Pressurizer vent isolation valve RC-580B Pressurizer vent isolation valve RC-575A Combine gas vent to PRT SOV 5.38 Funher reactor vessel level adjustments should be per OP-SA, Section B.
Recovery from a condition that has caused or could lead to inadequate core cooling must be per SEP-1 Degraded RHR System Capability.
5.39 As soon as practical, stan processing the drain down water in the CVCS HUT to increase the boron concentration to ~2000 ppm so it can be used to refill the RWST/ cavity.
O Page 30 of 33 REFERENCE USE m
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTEPJNG REDUCED January 31,1997 INVENTORY TABLEI REACTOR VESSEL LEVEL COMPARISON TABLE LI-447B or Eevation LI-447/447A Tvaon NIS top hats 41'3" 96.1 %
96 1/8" Incore seal table 41'2" 95.1 %
95 1/8" Steam generator tubesheet bottom 41'1 1/2"
>94.6%
94 5/8" Reactor vessel flange 40'8" 89.1 %
89 1/8" RCP volute flange 38'3" 60.1 %
60 1/8" O
Steam generator channel head 36'2 1/2" 35.6 %
35 5/8" Reactor vessel Th nozzle top 35'7 3/8" 29.0%
29" Reactor vessel Th nozzle 3/4 35'5/8" 22.0 %
22" Reactor vessel Th nozzle centerline 34'S 3/8" 14.5 %
14 1/2" Reactor vessel Th nozzle bottom 33' 2 7/8" 0%
0" Page 31 of 33 REFERENCE USE e
NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATINO PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 INVENTORY FIGURE 1 ii
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NUCLEAR POWER BUSINESS UNIT OP 4D PART 1 OPERATING PROCEDURES MAJOR IPTE DRAINING THE REACTOR COOLANT SYSTEM TO Revision 46 i
A CVCS HUT WITHOUT ENTERING REDUCED January 31,1997 O',
INVENTORY FIGURE 1 A g
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O Page 33 of 33 REFERENCE USE e