ML20198C012
| ML20198C012 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 12/14/1998 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17265A479 | List: |
| References | |
| AP-RCS.2, NUDOCS 9812210269 | |
| Download: ML20198C012 (8) | |
Text
'
E0P TITLE:
REV: 10 AP-RCS.2 LOSS OF REACTOR COOLANT FLOW PAGE 1 of 7 li (O j %-)
i i
i ROCHESTER GAS AND ELECTRIC CORPORATION
(.
GINNA STATION CONTROLLED COPY NUMBER l
l l
l l
O l
RESPONSIBLEIMNAGER
!j r\\
U l
id ->4-9f EFFECTIVE DATE l
l l
l CATEGORY 1.0 l
REVIEWED BY:
l l
l O
- C/
9812210269 981214E PDR ADOCK 05000244 q
P PDRg
.. _ _ _. ~ _
I J
l E0P:
TITLE:
REV: 10 AP-RCS.2 LOSS OF REACTOR COOLANT PLOW l
PAGE 2 of 7 o
1 O 1
A.
PURPOSE - This procedure provides actions required to i
stabilize plant conditions following a loss of reactor coolant flow.
B.
ENTRY CONDITIONS / SYMPTOMS l
1.
SYMPTOMS - The symptoms of LOSS OF REACTOR COOLANT FLOW are:
l a.
Annunciator A-17, MOTOR OFF RCP CCWP, lit, or l
b.
Annunciator B-29, RCP BREAKER CHANNEL ALERT, lit, or I
Low RCS flow indicated in either or both loops and c.
verified by more than one indication, or l
d.
Steam flow rapidly decreasing in one loop and rapidly increasing i.n the other loop.
l e.
Annunciator B-27, (28), RCS Loop A(B) Lo Flow Channel Alert.
1 l
l l
i
~.
E0P -
TITLE:
REV: 10 AP-RCS.2 LOSS OF REACTOR COOLANT FLOW PAGE 3 of 7 pb ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP CAUTION IF, AT ANY. TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS. E-0, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
1 Check RCS flows:
- a. Verify at least one loop
- a. E reactor trip breakers closed, operating:
THEN trip the reactor and go to E-0 REACTOR TRIP OR SAFETY o One RCP running INJECTION.
o Flow greater than 91% in one
- 1) H reactor trip breakers loop open, verify natural circulation per Attachment NC AND go to Step 2.
- b. Verify two loops operating:
- b. E power greater than 8%, THEN r
trip the reactor and go to E-0, o Both RCPs running REACTOR TRIP OR SAFETY INJECTION.
o Flow greater than 91% in both
- 1) H power less than 8%, THEN loops go to step 2.
- c. Return to procedure and step in l
effect 2 Verify ROD CONTROL BANK Place R0D CONTROL BANK SELECTOR SELECTOR In MANUAL switch in MANUAL.
O
l' E0P:
TITLE:
~
REV: 10 AP-RCS.2 LOSS OF REACTOR COOLANT FLOW l
PAGE 4 of 7.
- O ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP CAUTION 1
IF ONLY ONE RCP IS LOST. THEN A DECREASS (SHRINK) IN IDLE S/G LEVEL COUPLED i
WITH AN INCREASE (SWELL) IN OPERATING S/G LEVEL SHOULD BE ANTICIPATED.
I j
3 Monitor S/G Levels - TRENDING Restore narrow range level to 52%.
TO 52%
1E S/G level can NOT be restored, THEN trip the reactor and go to a
E-0 REACTOR TRIP OR SAFETY
}
INJECTION.
1
)
- l.-
1
!O i
/~N d
1
E0P:
TITLE:
REV: 10 AP-RCS.2 LOSS OF P' TACTOR COOLANT FLOW 2
PAGE 5 of 7 O
ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP m,-
F_0IE: Temperatures in the idle loop may not be indicative of true Tavg and Q
AT values and may affee automatic control systems operation.
Operating loop values should be used for control.
4 Establish Stable Plant Conditions:
- a. Tavg - TRENDING TO TREF
- a. Insert control rods or. if necessary decrease turbine load to match Tavg of the operating loop to Tref.
- b. PRZR pressure - TRENDING T0
- b. Verify proper operation of PRZR 2235 PSIG heaters and spray or take manual control of PRZR pressure controller 431K. E pressure can EQT be controlled, THEN refer to AP-PRZR.1, ABNORMAL PRESSURIZER PRESSURE.
- c. PRZR level - TRENDING TO PROGRAM
- c. Verify proper operation of charging pump speed controllers E take manual control of speed controllers to control PRZR level. H letdown isolation has occurred. THEN place Letdown Loop B Cold Leg to RHX A0V-427 to close.
- d. Check S/G 1evels TRENDING T0
- d. Control feed flow as necessary 52%
to restore both S/G 1evels to
$2%.
- e. Steam dump valves - CLOSED
- e. Ensure proper operation of steam dump control system.
O
' i-E0P:
TITLE:
l.
REV: 10 i
AP-RCS.2 LOSS OF REACTOR COOLANT FLOW I
PAGE 6 of 7 O'
l^
)
l-ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP 5 Check Letdown Status
- a. Normal OR Excess Letdown in
- a. GO TO Step 6.
service.
- b. GO TO Step 7.
l 6 Establish Normal Letdown:
Perform the following steps in sequence to establish excess
- a. Establish charging line flow to letdown:
REGEN Hx - GREATER THAN 20 GPM o Place excess letdown divert
- b. Verify the following switches in valve. A0V-312. to NORMAL CLOSE:
o Ensure CCW from excess letdown Letdown orifice valve open. A0V-745-e (A0V-200A. A0V-200B and A0V-202) o Ensure RCP seal return isolation Loop B cold Icg to REGE!! Hx valve open. MOV-313 e
(q)
A0V-427 U
i o Open excess letdown isolation
. TCV-130 excess letdown temperature less e PCV-135 than 195'F and pressure less than 100 psig
- d. Open A0V-427
- e. Open letdown orifice valven as necessary
- f. Place TCV-130 in AUTO at 105'F
- g. Place PCV-135 in AUTO at 250 psig
- h. Adjust charging pump speed and HCV-142 at. necessary l
l
l-E0P:
TITLE:
l REV: 10 AP-RCS.2 LOSS OF REACTOR COOIANT FLOW 3
l ACTION / EXPECTED RESPONSE RESPONSE NOT OBTAINED STEP
.1 CAUTION SHUTDOWN MARGIN REQUIREMENTS SHOULD BE VERIFIED (REFER TO 0-3.1 BORON l
CONCENTRATION FOR XENON FREE ALL RODS IN MOST REACTIVE ROD STUCK OUT SHUTDOWN l
MARGIN).
1 l
l 7 Check Reactor Status:
Initiate plant shutdown (Refer to j
appropriate section of 0-2.1, l
o Reactor Trip Breakers open NORMAL SHUTDOWN TO HOT SHUTDOWN).
l NQIE: Refer to 0-9.3. NRC IMMEDIATE NOTIFICATION, for reporting i
requirements.
8 Notify Higher Supervision 9 Return To Procedure Or g
Guidance In Effect
-END-l I
I l
t l
_m
._.__.,__--.._..m E0P:
TITLE:
j.
REV: 10 AP-PCS. 2.-
LOSS OF REACTOR COOLANT FLOW I
j PAGE 1 of 1 1-
[]
i
\\,3 AP-RCS.2 APPENDIX LIST j.
TITLE i
1)
FIGURE MIN SUBCOOLING (FIG-1.0) j-2)
ATTACHMENT NC-(ATT-13.0)
) -
4 b
.i 1
i i
\\
i l
?
I l'
l I
l