ML20205A628
Text
_____
_o STATI@4 PROCEDURE COVER SHEET e
A.
IDENTIFICATION Numbers E0P 2540C Rev.
3 l,,b
Title:
FUNCTIONAL RECOVERY OF RCS INVENTORY AND PRESSURE Prepared By: STEVE BRINKMAN B.
REVIEW I have reviewed the above procedure and have found it to be satisfactory.
TITLE SIGN 47URE DATE DEPARTMENT HEAD s,w u m cela A Ay l
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C.
SPECIFIC UNREVIEWED SAFETY QUESTION EVA'.UATION REQUIRED:
l Modifies intent of procedure and changes operation of systems as described in design documents.
YES [ ]
NO (k]
(If yes, perform written USQ determination and Safety e Evaluation, and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)
ENVIRONMENTAL REVIEW REQUIRED (Adverse environmental impact)
YES [ ]
NO [Au]
D.
SPECIFIC SAFETY EVALUATION REQUIRED Affects response of safety systems, performance of systems which may have been credited in the safety analysis or non-credited systems which may indirectly affect safety system response.
YES [ ]
NO K (If yes, perform written Safety Evaluation and contact Manager. Safety Analysis Branch to determine need for Integrated Safety Evaluation.)
E.
INTEGRATED SAFETY EVALUATION REQUIRED YES [ ]
NO [p F.
PROCEDURE REQUIRES PORC/SORC REVIEW (In addition to review, items with a YES response must be documented in the PORC/SORC meeting minutes.)
YES NO [ ]
G.
PORC/SORC APPROVAL PORC/50RC Meeting Number b'li* O l H.
APPROVAL AND IMPLEMENTATION The attached procedure is hereby approved, and effective on the date below:
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I S t,s tf e n/ S e rv i c e /U nT't S up e r i n t e nd e n t Effective Date SF301/9/s/SES/87-12/lof1 001026005S 001007 PDR ADOCK 05000E13 P
. - _..... =, _ -. _ _ _.
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6 j-FUNCTIONAL REC 0VERY.OF RCS INVENTORY AND PRESSURE Page No.
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EOP 2540C Page 1 f,
Rev. 3 1
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O FUNCTIONAL RECOVEfiY OF RCS INVENTORY AND PREScVRE 1.
PURPOSE L
To provide a systematic procedure to restore and maintain RCS Inventory and Pressure Control.
2.
ENTRY CONDITIONS Functional Recovery, E0P 2540, indicates that RCS Inventory and Pressur,e Control is not being satisfied.
O O
E0P 2540C Page 2 Rev. 3
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FUNCTIONAL RECOVERY OF RCS INVENTORY AND PRESSURE
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3.
OPERATOS ACTIONS Instructions Contincency Actions CAUTION Do not leave this procedure until satisfying RCS Inventory and Pressure Control.
Otner safety function (s) may be pursued concurrently.
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3.1 Determine, based on present plant 3.1 Continue with this procedure conditions, which success paths can be used to satisfy RCS Inventory and Pressure Control.
Refer to Figure 4.1, RCS Inventory and Pressure Control.
NOTES 1.
Steps 3.2 through 3.4 are provided for high RCS Pressure Conditions (CVCS, PORVs).
2.
Step 3.5 is provided for intermediate RCS Pressure Conditions (HPSI pumps).
]
3.
Step 3.6 is provided for low RCS Pressure Conditions (LPSI pumps).
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l E0P 2540C Page 3
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Rev. 3 l
e Instructions Contingency Actions
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Normal RCS Inventory and Pressure Control CAUTIONS 1.
If spray water differential temperature exceeds 200'F. then notify Engineering.
If maximum spray water differential exceeds 350*F, an Engineering evaluation must be performed after the event.
2.
If an excessive plant cooldown has occurred there is a potential for Pressurized Thermal Shock (PTS) of the reactor vessel.
During this situation, Pressure / Temperature limits of Figure 4.7 must be maintained.
O 3.2 Restore RCS inventory and
- 1. 2 pressure control by the following (Refer to Figure 4.2) a.
Perform Startup of CVCS a.
Continue with this (Volume Control OP 2304A) procedure b.
Operate charging and b.
Evaluate the use of letdown to restore another success path, i.
Pressurizer level
[
20-80% (CO3) and 11.
Pressure / Temperature limits of Figure 4.7 satisfied for
[
operating loop (CO3/C101)
E0P 2540C Page 4 I
key. 3
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Instr c,tions Contingency Actions L\\ '
c.
Verify proportional c.
heaters operating in 1.
Manually operate automatic (CO3) proportional heaters EI
- 11. Operate backup heaters d.
Verify proper operation d.
Initiate aux 111;ry of main spray (C03) spray per OP 23040 e.
Verify RC.S pressure e.
11 RCS pressure control withi1 the limits of not verified, Then, Figure 4.7 for operating hvaluate use of another l
loop (CO3, C101) success path per Figure 4.1 a
f.
Verify RCS inventory f.
If RCS inventory control control by not satisfied, Then a
1,.
Pressurizer level evaluate the use of r
i is 20-80%
anotner success path per (CO3)
Figure 4.1 and 11.
Pressure / Temperature limits of Figure 4.7 satisfied for operating l
loop (C03. C101) iii.
Reactor vessel level above i
fuel alignment plate (>0%)
(ICC level display) i L
i r
E0P 2540C Page 5 Rev. 1
7 h
e Instructions Contingency Actions
(-
(
)
g.
i.
Go to next safety g.
Not applicable function not satisfied.
(Refer to OPS Form 2540-1).
OE 11.
If all safety functions are satisfied per OPS Form 2540-1, Then go to E0P 2540, Step 3.10.
RCS Inventory and Pressure Control using CVCS on Solid RCS CAU1 IONS 1.
When the GCS is solid, closely monitor any makeup or draining.and system heatup or cooldown to avoid any unfavorable pressure excursions.
(
2.
RCP operation is not allowed during solid plant conditions.
- 3. 3 Restore RCS inventory and
- 3. 3 pressure control using the CVCS (Refer to Figure 4.3),
a.
Verify RCPs not running a.
Stop RCPs b.
Reestablish charging and b.
Continue with this letdown per OP 2304A.
procedure.
c.
Operate charging and c.
Continue with this letdown to restore RCS procedure, pressure within the limits of Figure 4.7 for operatirg loop (C03, C101) 0 E0P 2540C Page 6 Rev. 3
e i
Instructions Continaency Actions s
d.
Meri;y RCS pressuro control d.
If RCS pressure control by RCS pressure within the not satisfied, Then.
j limits of Figure 4.7 evaluate use of another t
for operating loop (CO3, C101) su'; cess path per Figure 4.1, I
I I
e.
When conditions permit, Then e.
Continue with this reestablish pressurizer bubble per procedure Plant Startup, OP 2201 f.
1.
Go to rext safety function f.
Not applicable not satisfied.
(Refer to l
OPS Form 2540) 2E l
11.
If all sa'fety functions are satisfied per OPS Form 2540-1, L
Then go to E0P 2540, Step 3.10 j
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E0P 2540C Page 7
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Rev. 3 i
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r Instructions Contingency Actions C\\
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RCS Inventory and Pressure Control usina PORVs (Pressure Reduction)
CAUTION The use of P0nVs is expected to rapidly depressurize the RCS.
This depressurization may cause a rapid pressurizer level increase such that water would be passed through the PORVs.
This means of pressure z
reduction should only be used if other means are not available.
3.4 Restore RCS pressure control 3.4 using PONVs (Refer to Figure 4.4) a.
If RCS pressure not a.
Continue with this within the u'per limits procedure.
p of Figure 4.7, Then 1.
Verify operabilitiy of charging pumps (CO2) 11.
Close one 90RV block valve (CO2) 111. Install bypass key in one high pressure trip bistable and select "Bypass" position (RPS) tv.
Open PORVs by pulling bypassed high pressure trip bistable and one othea (RPS) v.
Operate bypass key to open PORVs (RPS)
E0P 2fr40C Page 8 Rev. 3
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Instructions Continaency Action b.
When RCS pressure within b.
limits of Figure'4.7 for
- 1. H PCS pressure operatir.g loop T tlien cannot be lowered, operate the bypass key to Then go to Func-close the PORVs (RPS) tional recovery on Heat Removal, E0P 25400 d
i.
l1. H PORV sticks open Then close PORV block valve (CO3)
I c.
c.
Not applicable 1.
,Go to next safety o
function not satisfied.
i 6
(Refer to OPS Form 2540-1) t j
or i
11.
E all safety functions are satisfied per OPS Form 2540-1, Then go to E0P 2540, Step 3.10 i
1 4
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l E00 2540C Page 9 Rev. 3
._______-___-, -.- _,~ _ _-_ _, _ _, _.,
e Instructions Contingency Actions O
RCS Inventory and Pressure Control using HPSI Pumps CAUTIONS 1.
Do not terminate safety injection flow until all termination criteria of 3.5f are satisfied.
2.
If termination criteria cannot be maintained after the HPSI pumps are stopped, then at least one HPSI pump must be restarted.
I i
l-NOTE The HPSI pump design minimum suction pressure is 10 psig.
This is indicated by LPSI pump discharge pressure (Col) or by local indication.
Increased
()
containment wide range sump level and pressure will contribute to this value.
3.5 Restor _e RCS inventory and
- 3. 5 pressure control usinC HPSI pumps a.
Verify RCS pressure less a.
Do the following than 1200 psia (CO3) 1.
Reduce RCS pressure by operating main or auxiliary spray 11.
Ensure adequate RCS heat removal per E0P 15400 111. Reevaluate use of CVCS, Step 3.2 l
O E0P 2540C Page 10 Rev. 3 l
e Instructions Continaency Actions IV b.
Verify RWST level greater b.
Do the following than 10% and suction path f.
If SRAS has occurred, from RWST to HPSI pumps Then verify contain-por Figure 4.5 (C01) 56nt sump level greater than 5 feet
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(C101) and suction path to HPSI pumps (C01) '
11.
Manually operate t
valves (local) t 111. Replenish RWST
[
(local) b c.
Verify flow path from c.
Manually operate.
HPSI pumps to RCS per valves Figure 4.5 (Coli i
1.
d.
Operate HPSI pumps to d.
- None, restore 1.
Pressurizer level t
20-80% (CO3)
(
and L
11.
Pressure / Temperature limits j
of figure 4.7 satisfied for operating loop Th ( 03/C101) l I
i
!O E0P 2540C Page 11 Rev. 3 i
e g.
Inst'ruction3 Convincency Actions e.
Monitor HPSI pump performance e.
while on SRAS 1.
11 HPSI flow is less 1.
Total HPSI flow greater than than required, Then 60 gpm (30 gpm for one pump turn off one charging operation) pump at a time and then one HPSI pump until 11.
Total HPSI flow less than the remaining flow is 1350 gpm (less than 675 is greater than 30 for one pump operation) gpm.
iii. Stable aotor current,
- 11. If cavitation occurs discharge pressure and Then throttle the flow.
affected pump's discharge until the e
cavitation stops.
f.
When all the following f.*
conditions exist, Then 1.
If the termination O'
one facility at a time, the conditions do not HPSI pumps may be throttled exist, Then HPSI or stopped pumps must continue to operate 1.
Pressurizer level greater and than 35% and constant or
- 11. If inventnry control increasing (CO3) not beiig restored.
Then reevaluate use of CVCS and refer to 11.
Pressure / Temperature limits RCS heat removal, I
of Figure 4.7 satisfied for E0P 25400 operating loop Th (CO3/C101) j 111.
Reactor vessel level above top of hot leg (143%)
(ICC level display)
I O
E0P 2540C Page 12 Rev. 3 i
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Instructions Contingency Actions jq g.
1.
Go to next safety function g.
Not applicable l
not satisfied.
(Refer to OPS Form 2540-1) or 11.
If all safety functions are I
satisfied per OPS Form 2540-1, Then go to E0P 2540 Step 3.10 t
i RCS Inventory and Pressure Control usina LPSI Pumps NOTE Degraded containment conditions may cause pressurizer pressure error.
The e'rror may be as high as 151 psi.
1 3.6 Restore RCS inventory control 3.6 using LPSI pumps a.
Verify RCS pressure a.
Do the following less than 200 psia (CO3) 1.
Reduce RCS pressure t
by operating auxiliary soray or PORVs 11.
Ensure adequate RCS i
heat removal per E0P 25400 l
a 111. Evaluate use of another success path per Figure 4.1 i
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E0P 2540C Page 13 Rev. 3
.,-..--.._.-------.-..,,-.w--
~
e Instructions Continaency Actions b.
Verify RWST level greater b.
po the following than 10% and suction 1.
Jf SRAS'has occurred,-
path to LPSI pump pe" Then verify contain-Figure 4.6 ment sump level greater than 5 feet (C101) and suction path to LPSI pumps (Col) 11.
Manually operate valves (local) 111. Replenish RWST, (local) c.
Verify flowpath from LPSI c.
Manually operate valves pumps to RCS per Figure 4.6 (Col)
O d.
Operate LPSI pumps to d.
,J.f, SRAS has occurred, restore Then verify each LPSI 1.
Pressurizer level pump flow greater than 20-80% (CO3) 100 gpm (Col) and 11.
Pressure / Temperature limits of Figure 4.7 satisfied for operating loop Th (CO3/C101) e.
Verify RCS inventory control e.
Qo the following by 1.
Pressurizer level is i.
jf RCS inventory 20-80% (CO3) control not verified and RCS is less than 200 psia, Then LPS!
O E0P 2540C Page 14 Rev. 3
ii.
Pressure / Temperature limits pumps must continue
[ )l of Figure 4.7 satisfied for to operate operating loop Th (CO3/C101) 11.
Ensure RCS heat removal is adequate per E0P 25400 111.
Reactor vessel level above 111. Evaluate use of fuel alignment plate (>0%)
another success path
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(ICC level display) per Figure 4.1 f.
i.
Go to next ',efety function f.
Not applicable not satisfied. (Refer to 0FS Form 2540-1)
SI 11.
If all safety functions are satisfied per OPS Form 2540-1, Then go to E0P 2540 Step 3.10 4.
FIGURES.
O 4.1 RCS Inventory Control Success Paths 4.2 Normal RCS Inventory and Pressure Control 4.3 RCS Inventory and Pressure Control using CVCS on a solid RCS 4.4 RCS Pressure Control using PORVs 4.5 RCS Inventory and Pressure Control using HPSI pumps 4.6 RCS Inventory and Pressure Control using LPS! pump 4.7 RCS Pressure / Temperature limits
- Final -
O E0P 2540C Page 15 Rev. 3
c FIGURE 4.1 RCS INVENTORY AND PRESSURE CONTROL SUCCESS PATHS SUCCESS Pt.TH METHOD STEP FIGURE NORMAL 9CS PROPORTIONAL OR BACKUP 3.2 4.2 INVLNTORY AND NEATERS OR PRESSURIZER PRES 3URE CONTROL SPRAY MAINTAINING RCS (RCS PRFSSURE PRESSURE, CVCS MAINTAINING
> 1200 PSIA)
RCS INVENTORY RCS INVENTORY CHARGING PUMP (S) OPERATING ON
- 3. 3 4.3 AND PRESSURE A SOLIO RCS.TO MAINTAIN CONTROL USING PRESSURE AND INVENTORY CVCS (RCS PRESSURE
> 1200 PSIA) l
^
RCS INVENTORY RCS PRESSURE BEING MAfNTAINED 3.4 4.4 AND PRESSURE BY CYCLING PORV's CONTROL USING PORV's (RCS PRESSURE
> 1200 PSIA)
- 3. 5 4.5 CONTROL USING OPERATING TO MAINTAIN HPSI PUMPS (RCS ACS PRESSURE AND INVENTORY PRESSURE < 1200 PSIA)
RCS PRESSURE LPS! PUMPS OPERATING 3.6 4.6 CONTROL USING TO MAINTAIN RCS INVENTORY LPSI PUMPS (RCS AND PRESSURE PRESSURE < 2C0 PSIA)
E0P 2540C Page 16 Rev. 3
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e NORMAL RCS INVENTORY AND PRESSURE CONTROL l
Figure 4.2 l
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E0P 2540C Page 17 l
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RCS INVENTORY AND PRES $URE CONTROL USING CVCS ON SOLID RCS Figure 4.3 t<nor t &t0*
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RCS INVENTORY PRESSURE CONTHOL USING PORVs (PRESSURE REDUCTIONS)
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E0P 254f
Page 19
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I RCS INVENTORY AND PRESSURE CONTROL HPSI PUMPS Figure 4.5 l
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1 FIGURE 4.7 PRESSURE
- 'EMPERATURE CURVES 2500 i
v)
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- ACCEPTABLE -
1 ACCG PTArM.E
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2000 I
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200 300 400 500 600 RCS TEMPERATURE (F)
- This curve supercedes the 200F/HR cooldown curve any tirae the RCS has experienced an uncontrolled cooldown to below 500F, (O
- This curve supercedes the 30F subcooling curve if, at any tirne, the contain. ment pressure has exceeded Spsig.
,E0P 2540C Page 22 Rev. 3
e FIGURE 4.7 (Continued)
TEMPERATURE LIMIT DATA RCS PRES $URE PTS LIMIT 100'F/HR 30*F DEGRADED 200'F C00Lc0WN SUSC00 LED CTMT
$U8 COOLED CURVE RCS SATURA(ION MINIMUM MINIMUM MAXIMUM MXIMUM TEMP PRESSURE PRESSURE PRESSURE PRESSURE
/RESSURE (CF)
(psia)
(psia)
(psia)
(psia)
(psia) 600 1543 1919 1919 upper Limit of 595 1487 1852
,1852 2350 590 1432 1787 1787 585 1378 1723 1723 580 1326 1662 1662 595 1276 1602 1602 570 1227 1543 1543 565 1180 1487 1487 560 1133 1432 1432 555 1089 1378 1376 550 1045 1326 1326 545 1003 1276 1276 540 963 1227 1227 535 924 1180 1180 530 885 1133 1133 25 848 1089 1089 520 813 1045 1045 515 -
778 1003 1003 510 744 963 963 505 712 924 924 500 681 885 885 455 650 848 848 490 621 813 813 485 593 773 773 480 566 744 744 1
475 540 712 712 l
470 515 681 687 465 400 650 657 0
460 467 621 633 2350 455 434 593 607 2286 l
450 423 566 582 2208 t
445 402 540 561 2133 440 382 515 540 20E f
435 362 490 522 1989 430 344 467 502 1919 I
425 326 434 483 1852 420 309 423 467 1787 415 292 402 451 1723 V
410 277 392 436 1662 405 262 362 408 3602 00 247 344 406 1543 i
E0P 2540C Page 23 Rev. 3
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FIGURE 4.7 (Continued) 5--
RCS PRESSURE TEMPERATURE LIMIT DATA l
PTS LIMIT 100*F/HR 30*F DEGRADED 200*F C00LOOWN a
SUSC00 LED CTMT SUBC00 LED CURVE l
RCS SATURATION MINIMUM
' MIN! MUM MAXIMUM MAXIMUM TEMP PRESSURE PRESSURE PRESSURE PRESSURE PRESSURE
(*F)
(psia)
(psia)
(psia)
(psia)
(psia)
}T5 233 326 392 1447 Upper Limit 390 220 309 378 1432 of 2350 385 208 292 366 1378 390 196 277 353 1326 375 184 262 340 1276 370 173 247 329 1227 365 163 233 319 1180 360 153 220 309 1133
- 355 144 208 299 1089 350 135 196 289 1045 345 126 184 281 1003 340 118 173 2 7 *-
963 335 110 163 26h 924 330 103 153 256 885 O
325 96 1 44 251 848 320 90 135 242 813 315 84 126 236 778 310 78 118 230 744 305 72 110 224 712 300 67 103 219 681 395 62 96 214 650 0
290 58 90 210 621 2230 285 53 84 205 593 2100 280 49 78 202 566 1970 i
275 45 72 198 540 1850 270 42 67 196 515 1130 265 39 62 192 490 1620 260 35 58 190 467 1530 t
213 32 53 188 434 14T6 250 30 49 1 84 423 1370 245 27 402 1300 240 25 382 1230 235 23 362 1170 230 21 344 1100 225 19 326 1040 27a 17 309 980 2.. a 16 292 930 1
210 14 277 880 205 13 262 840
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200 12 247 800 E0P 2540C Page 24 Rev. 3}