ML20042G960

Rev 3 to Emergency Operating Procedure AP-RHR.2, Loss of RHR While Operating at RCS Reduced Inventory Conditions

ML20042G960
Person / Time
Site:	Ginna
Issue date:	04/20/1990
From:	Widay J ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML20042G894	List: ML20042G893 ML20042G960 ML20042G963 ML20042G965
References
AP-RHR.2, NUDOCS 9005160337
Download: ML20042G960 (12)

Text

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' LOSS OF,RHR WHILE OPERATING'.AT-RCS REDUCED f

INVENTORY CONDITIONS PAGE 1 of 11' y]f ROCHESTER GAS AND ELECTRIC CORPORATION l

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AP-RHR.2 LOSS OF RHR WHILE OPERATING AT RCS REDUCED t

INVENTORY CONDITIONS PAGE 2 of ll 1

A.

' PURPOSE - This procedure provides guidance necessary for maintain-ing core cooling and protecting the reactor core in the event that RHR cooling is lost during RCS reduced inventory operation, (i.e.,

at indicated "B" Loop Levels of less than 64 inches).

-B.

ENTRY CONDITIONS / SYMPTOMS 1.

SYMPTOMS - The symptoms of (Loss of RHR At RCS Reduced Inventory Conditions) are-l a.

Annunciator A-20, RESIDUAL HEAT REMOVAL LOOP LO FLOW 2900 GPM (Set at 400 GPM per 0-2.2 in RHR Cooling mode) alarm is lit, or b.

Unexpected increase in RCS temperature while on RHR cooling at low loop'lovels, or c.

Erratic or no flow on FI-626, or d.

Annunciator J,-9, Safeguard Breaker _ Trip alarm lit.

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'AP-RHR.2 LOSS OF RHR WHILE OPERATING AT RCS REDUCED

' INVENTORY CONDITIONS PAGE 3'of 11 g

ACTION /EXPhCTED RESPONSE RESPONSE NOT OBTAINED STEP l Establish CNMT Closure 0-2.3.lA,-CONTAINMENT. CLOSURE CAPABILITY'DURING RCS REDUCED INVENTORY OPERATION, Step 5.8, while continuing with this procedure 2 Check RHR Pumps - AT LEAST Go to Step 7.

ONE RUNNING CAUTION DO NOT START A SECCND RHR PUMP UNTIL THE CAUSE OF THE ERRATIC FLOW OR LOSS OF (LOW 'ON THE FIRST PUMP HAS BEEN DETERMINED AND CORRECTE.

3 Check RHR Flow - GREATER THAN Perform the following:

200 GPM AND STABLE

a. Stop all runnitig RHR pump (s).

'b. Go to Step 7.

L4-Verify ' CCW Operation:

Perform the followings o CCV: pumps - AT.LEAST ONE RUNNING

a. Restore CCV to RHRt o' CCV To RHR Hxs,-MOV-738A and o Start the standby CCV pump if

'MOV-738B - OPEN AS NECESSARY it is not running.

o. CCV temperature and flov alarms o Open MOV-738A and MOV-738B,.

- EXTINGUISHED as necessary.

b. JJP, CCW can NQT be restored,1HEH 7

C refer to AP-CCV.3, LOSS OF.CCV -

i PLANT SHUTDOWN, Step 1.

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REV: 3 AP-RHR.2 LOSS OF RHR WHILE OPERATING'AT RCS REDUCED N-INVENTORY CONDITIONS PAGE 4 of 11 r

b ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED I

STEP J:

5 Verify RHR Alignment - NORMAL Align valves as required.

(Refer.to Attachment A)-

1 6. Check RCS ' Temperature:

s

a. RCS temperature'- STABLE OR

a. Return to Step 2.

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-DECREASING q-

b. Go to Step 12 bCheckIfRCS'LoopLevelMust

- Be Raised:

a. RCS loop level - LESS THAN'30"

a. If,RCS loop. level is greater ON B LOOP LEVEL INDICATOR than.30", IEEE start an available RHR pump and go to I

Step 9 immediately.

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AP-RHR.2:

LOSS'OF RHR'WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS PAGE 5 ofl1'1 j

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ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP

• * * * *.* *J* * * * * * * *-* *.* * * * * * * *~* * * * * * * * * * * * * * *

• CAUTION 9

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BEFORE RAISING LOOP LEVEL,- THE S/G OFFICE SHOULD BE NOTIFIED.

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l 8 Increase RCS Loop' Level'By The:Following Methods, Listed in. Preferential Order of Use:

a; Gravity feed method

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1) Close RHR pump discharge

- valve to loop B cold Jeg, MOV-720 q

2) Dispatch A0 to locally open l;

RHR pump suction from RVST, I'-

MOV-856 m

3) Check RCS loop level -

3) H RCS loop level M' T!

a INCREASING'AS EXPECTED increasing, M perform. the following:-

a) Close MOV-856.

b) Open MOV-720.

f c) Go to Step 8b.-

i

4) WHEN B loop level indicator

' greater than 30 in., THEN close MOV-856

^i 5)-Open RHR pump discharge valve

5) H NOV-720 does E open, q

to B loop cold leg, MOV-720 M open core deluge valves MOV-852A and MOV-852B.

6) Start one RHR pump

7) Go to Step 9 immediately This Step continued on the next page, a:

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INVENTORY CONDITIONS PAGE 6 of 11 e

3Q ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP

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'(Step 8 continued from previous page)

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\\.b.~ Charging to intact loop cold leg method:

i.

1) Check B loop cold leg -

1) H A loop cold leg intact, h.

INTACT.

M go to' Step 8c.

H A loop cold leg EQI i

b, intact, M go to Step 8d.

2) Open charging.line valve to loop B cold leg, A0V-294 i

3) Verify HCV-142 demand at 0%

4)-. Start-operable charging pump

4) H charging pump vill EQI and increase flow to haximum start, M a) Close A0V-294.-

.i b) Go.to Step 8d.-.

5) Check RCS loop level -

5) H RCS loop level EQI INCREASING AS EXPECTED increasing as expected, M :

a) Stop operating charging:

pump.

b) Close A0V-294.

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c) H A loop cold leg intact, go to Step 8c.

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d) H A loop cold leg (101 l>

intact, go-to Step 8d..

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6) VHEN B loop level indicator greater than 30 in., THEN stop operating charging pump

7) Close charging line valve to

-loop B cold leg, A0V-294 0 (~

8) Start one RHR pump 1-g

.This-Step continued on the next page.

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hP-RHR.2' LOSS OF'RHR WHILE' OPERATING AT RCS REDUCED, l

= INVENTORY-CONDITIONS PAGE 7 of:11 n

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ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED S{EP

=

i (Step'8 continued from previous page)

9) Go to Step 9 immediately 1

c. Charging to A loop cold leg-

-method:

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1) Open alternate-charging line L

to loop A cold leg, A0V-392B L

2) Start operable charging pump

2) H charging pump vill F_01

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L and increase flow to maximum start, M t L

.a) Close A0V-392B.

i b) Go to Step 8d.

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3) Check RCS loop level'-

3) H RCS loop level F_QI

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INCREASING AS EXPECTED

. increasing'as expected, M L;. G D'

a) Stop operating charging

-l pump.

b).Close A0V-392B.

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c) Go to Step.8d-j

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'4) VHEN B loop level indicator greater than 30 in., THEN 4

stop operating' charging pump i.

5) Close alternate charging line 1

to' loop A cold leg,_A0V-392B p'

6).Siart one'RHR pump-i

7) Go to Step.9 immediately o.

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This Step continued on the next page.

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LOSS OF RHR WHILE OPERATING AT RCS~ REDUCED

[ Q[ 7

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INVENTORY CONDITIONS' PAGE 8 of 11'

.j ACTION / EXPECTED RES?ONSE RESPONSE NOT OBTAINED STEP l

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-(Step 8 continued from previous page)

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'd.~ Safety injection to loop hot

_ legs methods--

r 1);Open loop

• hot' leg SI inlet, E

valves:MOV-878A and/or 1.

HOV-878C

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p 2)-Open SI pumps suction valves 4

MOV-825A and/or.MOV-825B g

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4

3) Start operable safety.

-injection pump.'

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4) Check RCS loop level -

4) If,RCS loop level HQI 4

INCREASING AS EXPECTED increasing as expected, IEEE --

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a) Stop operating SI pump.

b) Close loop hot leg inlet, 4

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valves.

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• MOV-878A-

• MOV-878C

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c) Close SI pump suction-valves.-

• MOV-825A

• MOV-825B d) Return to Step 1.

5) VHEN B loop level indicator greater than 30 in., THEN stop operating safety injection pump-

6) Close SI pumps suction valves T

• MOV-825A i-

.* MOV-825B 7)'Close-loop hot leg SI inlet

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e valves-

• MOV-878A

• MOV-878C 4.-fg.

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8) Start one RER pump

9) Co to Step 9 immediately c

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)AP-RHR.2' LOSS OF RHR WHILE OPERATING AT RCS REDUCED INVENTORY CONDITIONS PAGE 9 of 11

,. O, t >. x ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP c

i 9' Verify RHR Flow:

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a. RHR flov - GREATER THAN 200 GPM

a. H an RHR pump is running with AND STABLE less than 200 gpm flow or O

erratic flov is indicated, IEEE perform the following:

1)-Stop running RHR pump.

2) Direct auxiliary operator to vent RHR suction line in CNMT by "A" loop, valve 2764.

3) Start one RHR pump.

4) Go to Step 10 immediately.

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b. Go to-Step 12 l

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.10 - Verify - RHR Flow:

a. RHR flov - GREATER THAN 200 GPM

a. H adequate RHR flow can HQT,be.

AND STABLE established, IggE perform the following:'

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1) Stop running PRR pump (s).

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2) Evacuate CNMT.

3) Check to assure that CNMT

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closure _is completed or.

nearing completion.

4) Place RCDT pumps in service (Refer to ER-RHR.1, RCDT.

OPERATION FOR CORE COOLING).

5) Go to Step 11.

b. Go to Step 12 i

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AP-RHR.2-LOSS OF:RHR:WHILE OPERATING AT RCS REDUCED.

INVENTORY CONDITIONS PAGE 10 of:11

}]2 ll W ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP

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.11 Verify.' Maintenance Notified' And Continue.Attempta'To-Restore Inoperable RHR. Pumps Or RHR' Flow:

p o, Maintenance - NOTIFIED N

o Attempts continued to restore

inoperable RHR pumps OR flow o Go to Step 12 i

12 Establish Monitoring of RCS Temperature:

o.RCS temperature - MONITORING ESTABLISHED 13; : Check' With fligher Supervision:'

.4 o.' Higher supervision - NOTIFIED 14 Check-Alternatives For Long

\\ Term Cooling:

r oi.Long term cooling alternatives -

' EVALUATED 15 - Check For. Site Contingency Classification:

o Site contingency ' classification

-= REFER TO SC-100,'GUINA g

STATION EVENT EVALUATION'AND i

CLASSIFICATION o

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LOSS;OF'RHR WHILE' OPERATING AT RCS REDUCED

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INVENTORY.' CONDITIONS

-PAGE 11 of 11 p4= v/ - -

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STEP ACTION /EXPECTEbRESPONSE RESPONSE NOT OBTAINED y

'16 Check ForlNRC Reporting-Requirements:

l o NRC reporting-requirements

- REFER TO 0-9.3,;NRC IMMEDIATE

' NOTIFICATION m

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,17 Verify RHR' Cooling:

o La. RHR cooling normal-

a. Return to Step 1.

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o. RHR cooling -' RESTORED o RCS temperature - STABLE OR

-DECREASING

b. Return - REQUIRED PLANT

-OPERATION s

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-END-

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REV:,3 AP-RHR.2 LOSS OF RHR-WHILE OPERATING AT RCS REDUCED 4,

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-INVENTORY CONDITIONS

-PAGE 1 of 1 i

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ATTACHMENI_A NORMAL RHR COOLING VALVE ALIGNMENT i

.IUUR from. Loop.A Hot Leg.................. MOV-700 Open MOV-701 Open l

RHR to Loop B' Cold Leg................... MOV-720 Open MOV-721 Open p

RHR Letdown to CVCS HCV-133 Open RHR Pump Discharge Cross-Connect......... V-709C Open V-709D Open

.i V-712A Open 7

RHR HX Bypass h

I V-712B Open l.

FCV-626 as desired

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HR From-1AERHR Hx....................... HCV-625 as desired RHR,From 1B RHR Hx....................... HCV-624-as desired I000 Supply Valve From RWST............... MOV-856 Closed i

L RHR Pump Suction. Valves l

A RHR Pump.................. MOV-704A Open B RHR Pump.................. MOV-704B Open m

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