ML20205A419

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Rev 2 to Emergency Operating Procedure EOP 2540A, Functional Recovery of Reactivity Control
ML20205A419
Person / Time
Site: Millstone, Haddam Neck, 05000000
Issue date: 08/03/1988
From: Brinkman S, James Smith
CONNECTICUT YANKEE ATOMIC POWER CO.
To:
Shared Package
ML20204H467 List: ... further results
References
EOP-2540A, NUDOCS 8810250509
Download: ML20205A419 (19)
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Text

f.

STATf0N PROCEDURE COVER SHEET e A. IDENTIFICATION

. Number: E0P 2540A Rev. 2

Title:

FUNCTIONAL RECOVERY OF REACTIVITY CONTROL Prepared By: S. Brinkman .

B. REVIEW I have reviewed the above procedure and have found it to be satisfactory.

TITLE SIGNATURE DATE DEPARTMENT HEAD ) 7he/W

_0%%s B,,.ww fMED - -- _

,hlw I J ( w C. SPECIFIC UNREVIEWE0 SAFETY QUESTION EVALUATION REQUIRED:

Modifies intent of procedure and changes operation of systems as described in design documents. YES [ ] NO (Xl (If yes, perform written USQ determination and Safety. .

Evaluation, and contact Manager, Safety Analysis Branch to determine need for Integrated Safety Evaluation.)

ENVIRONMENTAL REVIEW REQUIRE 0 .

(Adverse environmental impact) YES [ ] NO ()Q

0. 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 ( ) N0 %

(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%

F. PROCEDURE REQUIRES PORC/50RC REVIEW -

(In addition to review, Ttems with a YES response must be documented in the PORC/SORC meeting minutes.) NO ( )

YES %

G. PORC/SORC APPROVAL PORC/SORC Meeting Number h N - O l H. APPROVAL AND IMPLEMENTATION The attached procedure is hereby approveo, and effective on the date below:

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n/ Service /ttnit Superintendent Y If$$

Effective Date SF L /9/s/SES/87-12/lofi 8810250509 001007 PDR ADOCK O y3 7

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FUNCTIONAL RECOVERY OF REACTIVITY CONTROL

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EvP 2540A Page 1 Rev. 2

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FUNCTIONAL RECOVERY OF REACTIVITY CONTROL

1. PyqPOSE To provide a systematic procedure which ensures proper reactivity control by using either the CEA's or a borated water source and flowpath to ensure adequate shutdown margin.
2. ENTRY CONDITION Functional recovery, E0P 2540, indicates by the use of OPS Form 2540-1 that reactivity control requirements are not satisfied.

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1 E0P 2540A Page 2 Rev 2

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FUNCTIONAL RECOVERY OF REACTIVITY CONTROL

3. OPERATOR ACTIONS Instructions Contingenev Actions CAUTION Do not leave this procedure until satisfying reactivity control.

Other safety function (s) may be nursued concurrently.

3.1 Determine, based on present 3.1 Continue with this plant conditions, which procedure. .

success path can be used

(

) to satisfy Reactivity Control. Refer to. Figure 4.1, Reactivity Control.

l E0P 2540A Page 3 Rev. 2

~

! ) Instructions Contingency Actions

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1. Step 5 3.2 through 3.4 are listed by preferred actions.
2. This procedure can be entered at any step .is a result of assessing probable success paths.

CEA Insertion 3.2 Deenergize CEDM by the following 3.2 (Refer to Figure 4.2)

a. Push manual trip buttons (C04) a. Continue with this procedure .
b. Open CEDM MG set feeder breakers b. Continue with this (C04) procedure
c. Open all TCBs (local) c. Continue with this

(} procedure

d. Verify reactivity control by d. If reactivity control not
i. Reactor power less than satisf;ed, Then go to 5% and decreasing (C04) Step 3.3 a.,gLd
11. No r.iore than 1 CEA bottom light not lit (C04) j
s. e. Not applicable
1. Go to next safety function not satisfied. (Refer to OPS Form 2540-1) ,

0E ii. If all safety functions j are satisfied per OPS

() Form 2540-1, Then go to E0P 2540, Step 3.10 E0P 2540A Page 4 Rev. 2 ,

_ _ _ - -_ ~ _ _ - _ _ _

7 Instructions Contingency Actions Q'

BORATION USING CVCS NOTE Boration times from BAST when more than 1 CEA not fully inserted are:

a. 12 min /CEA - 3 chg pumps b, 18 min /CEA - 2 chg pumps
c. 36 min /CEA - 1 chg pump 3.3 Borate using the CVCS by the 3.3 following (Refer to Figure 4.3) -
a. Verify BAST level greater a. M BAST not available, than 10% (CO2) Then align charging pump suction to RWST by the following O 1. Open ma.seup from RWST, 2-CH-192 and 2-CH-504 (CO2) and
11. Close VCT makeup bypass valve, 2-CH-196 (CO2) iii. Increase boration times.
b. Open boric acid pump b. Open valve locally ,

discharge to charging pump, 2-CH-514 (CO2)

J E0P 2540A Page 5 Rev. 2

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[') Instructions Contingency Actions

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c. Start both boric acid c. If boric acid pumps pumps (CO2) fail to start, Then establish gravity feed
i. Open boric acid gravity feed valves, 2-CH-508 and 2-CH-509 (C02) and
11. Close VCT outlet valve, 2-CH-501 (CO2) .
d. Close boric acid pump d.

. recirculation valves, 2-CH-510 and 2-CH-511 (CO2)

( e. Verify normal charging e. If normal charging path discharge path by not available, Then align charging pumps to "A" HPSI header by the following

i. 2-CH-429 open (CO2) 1. Open 2-51-340 and 2-51-440 and and
11. 2-CH-518 or 2-CH-519 11. Verify at least open (CO2) one HPSI header "A" injection valve open i

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O LJ E0P 2540A Page 5 Rev. 2

,a -

( ) Instructions Contingency Actions C/suTIONS

1. If reactivity control not satisfied, then boration actions take priority over RCS inventory actions.
2. If letdown his been isolated due to ESAS, the RCS should be sampled for activity prior to reinitiating letdown flow (if time permits).
f. If RCS is solid (or nearly f. Establish letdown per solid), Then verify letdown Volume Control, OP 2304A path available (CO3) .
g. Operate all available charging g. Continue with this pumps and letdown to restore and procedure maintain
i. Pressurizer level 20-80% (C03) -

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and

11. Pressure / Temperature limits of ,

Figure 4.5 are satisfied for Th(CO3/C101)

h. Verify reactivity control h. M reactivity control by reactor power less than ?qt satisfied, Then 5% and decreasing (C04) 1. Continue boration 9.E it. M RCS pressure less than 1200 p$la, Then go to step 3.4 O

E0P 2540A Page 7

, Rev. 2

Instructions Contingency Actions t

i. - 1. Not applicable
i. Go to next safety function not satisfied.

(Refer to OPS Form 2540-1)

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11. If all safety functions are sati'sfied per OPS Form 2540-1, Then go to E0P 2540, Step 3.1" l

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/ Instructions Contingency Actions BORATION USING HPSI PUMPS CAUTION If pressurizer level and RCS subcooling cannot be maintained after HPSI pumps are stopped, then at least one HPSI pump must be restarted.

NOTE This success path can only be used if RCS pressure is or can be reduced to less than 1200 psia -

3. 4 Borate using the'HPSI pumps 3.4 by the fol. lowing
a. Verify RWST level greater a. Verify containment sump than 20 % (C01) level greater than 5 feet (C101)
b. Verify suction flowpath b. Verify suction flowpath from RWST per Figure 4.4 from containment sump per (C01) Figure 4.4 (C01)
c. Verify discharge flowpath c. Manually open valves from HPSI pumps to RCS per (local)

Figure 4.4 (C01) [

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d. Operate HPS! pump: to restore d. Continue with this and maintain procedure
i. Pressurizer level greate" than 20% (C03)

I and

11. Pressure / Temperature limits of / Figure 4.5 satisfied for Th(CO3/C101)

E0P 2540A Page 9

Rev. 2

e .

fN Instructions Contingency Actions

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e. Verify reactivity control by e. If reactivity control reactor power less than 5% not satisfied, Then and decreasing (C04) 1. Continue boration l EI Reevaluate use of 11.

another success path per step 4.1

f. f. Not applicable
i. Go to next safety function not satisfied. (Refer to ,

OPS Form 2540-1) '

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11. If all safety functions are satisfied per OPS Form 2540-1, r'~x Then go to E0P 2540, Step 3.10 V t r

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4. FIGURES 4.1 Reactivity Control Success Path 4.2 CEA :nsertion - Functional Schematic 4.3 Boration Using CVCS - Functional Schematic 4.4 Boration Using HPSI - Functional Schematic 4.5 RCS Pressure / Tempera +,ure Limits ,

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E0P 2540A Page 11 [

Rev. 2 1 i

(m) FIGURE 4.1 REACTIVITY CONTROL SUCCESS PATHS SUCCESS .

PATH METHOD STEP FIGURE CEA REMOVE POWER 3. 2 4.2 INSERTION FROM CEDMS BORATION USING INJECTED BORATED WATER 3. 3 4.3 CVCS INTO RCS FROM EITHER BAST (S) OR RWST USING CHARGING PUMPS . ,

BORATION USING INJECT BORATED WATER 3.4 4.4 HPSI PUMPS INTO USING HPSI PUMPS (RCS AT REDUCEO PRESSURE)  !

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E0P 2540A Page 12 Rev. 2

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E0P 2540A Page 14 Rev. 2

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FUNCTIONAL SCHEMATIC - 80 RATION USING THE HPSI PUMPS

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E0P 2540A Page 15 l Rev. 2

FIGURE 4.5 RCS PRESSURE / TEMPERATURE t.IMITS O

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200 300 400 500 600 RCS TEMPERATURE (F) o This curve supercedes the 100F/HR cooldown curve any tire the RCS has emperienced an uncontrolled cooldomn to below 500F, i " This curve supercedes the 30F Subcooling curve if, at any time, the contain.ent l

pressure has exceeded Spsig.

E0P 2540A Page 16 Rev. 2

. RCS PRESSURE / TEMPERATURE LIMIT DATA DATA SHEET 1 PTS LIMIT 100'F/HR 30'F DEGRADE 0 200*F C00LOOWN

$U8C00 LEO CTMT SUSC00 LED CURVE RCS SATURATION MINIMUM MINIMUM MAXIMUM MAXIMUM TEMP PRESSURE PRESSURE PRESSURE PRESSURE PRESSURE

('F) (psia) (psia) (psta) (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 1(El 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 525 848 1089 1089 520 813 1045 O\ 515 778 1003 1045 1003 510 744 963 963 505 712 924 924 500 681 885 865 495 650 848 848 490 621 813 813 485 593 773 773 480 566 744 744 475 540 712 712 470 515 681 647 465 490 650 657 U 460 467 621 633 2350 455 434 593 607 2286 450 423 566 542 2208 445 402 540 561 2133

, 440 382 515 540 2060 435 362 490 522 1989 430 344 467 502 1919 425 326 434 483 1852 420 309 423 467 1787 i 415 292 402 451 1723

! 410 277 392 435 1662 "

405 262 362 404 1602

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E0P 2540A Page 1/

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RCS PRESSURE / TEMPERATURE LIMIT DATA IO OATA SHEET 1 (Continued)

V PTS LIMIT 100'F/HR 30'F DEGRADED 200'F COOLDOW SUBC00 LED CTMT SUSC00 LED RCS SATURATION CURVE MINIMUM MINIMUM MAXIMUM TEMP MAXIMUM PRESSURE PRESSURE PRESSURE PRESSURE PRESSURE

(*F) (psta) (psia) (psia) (psia) (psia) 395 233 326~ 392 1487 Upper Limit 390 220 309 378 385 1432 of 2350 208 292 366 1378

_380 196 277 353 '

375 1326 184 262 340 370 1276 373 247 329 365 1227 163 233 319 118o 360 153 220 309 1133 355 144 208 299 350 1081 115 196 289 1045 .

345 126 184 281 343 1003 118 173 275 963 335 110 163 265 924 330 103 153 256 885 325 96 144 251 320 848 90 135 242 t13 315 84 i

0s 310 78 126 118 236 230 775 744 305 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 275 45 72 198 540- 1850 270 42 67 196 515 1730 265 39 62 192 490 1620 260 35 58 190 467 1530 255 32 53 188 434 3.450 250 30 49 184 423 1370 245 27 '

402 1300 240 25 382 1230 235 23 362 1170 230 21 344 1100 225 19 326 1040 220 17 30g 930 215 16 292 930 -

210 14 277 880 205 13 262 840 700 12 247 800 E0P 2540A Page IC Rev. 2

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