ML17263A260
| ML17263A260 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 04/21/1993 |
| From: | Marlow T ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17263A255 | List: |
| References | |
| AP-RCC.3, NUDOCS 9305140022 | |
| Download: ML17263A260 (14) | |
Text
EOP:
AP-RCC.3 T1TLE:
DROPPED ROD RECOVERY REV:
0 PAGE 1 of 7 ROCHESTER GAS AND ELECTRIC CORPORATION GINNA STATION CONTROLLED COPY NUMBER TECHNICAL REVIEW PORC REVIEW DATE / +~ 9~
LANT SUPERINTENDENT EFFECTIVE DATE CATEGORY 1.0 REVIEWED BY:
qg05140022 500024 PDR ADQCK 0 PDR I
F
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AP-RCC.3 DROPPED ROD RECOVERY REV:
0 PAGE 2 of 7 A.
PURPOSE This procedure provides the guidance necessary to control the plant during a transient resulting, from a dropped control rod.
B.
ENTRY CONDITIONS/SYMPTOMS 1.
SYMPTOMS The symptoms of dropped control rod are; a.
Annunciator E-28, POWER RANGE ROD DROP ROD STOP
-54/5 SEC, lit, or b.
Annunciator C-14, ROD BOTTOM ROD STOP, lit, or c.
MRPI Indicates control rod(s) on bottom, or
EOP:
AP-RCC.3 TITLE:
DROPPED ROD RECOVERY REV:
0 PAGE 3 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED CAUTION o
IF AT ANY TIME DURING THIS PROCEDURE, A REACTOR TRIP OR SI OCCURS, THEN E-O, REACTOR TRIP OR SAFETY INJECTION, SHALL BE PERFORMED.
o BANK ROD WITHDRAWAL SHOULD NOT BE PERFORMED UNTIL THE MISALIGNED ROD IS RECOVERED.
NOTE:
A NIS or MRPI dropped rod signal will block AUTO out rod motion.
1 Place Rod Control Bank Selector Switch TO MANUAL 2
Check RCS Tavg STABLE AT PROGRAM Perform the following:
a.
Place EH control in MANUAL.
- b. Manually reduce turbine load as necessary to match Tavg and Tref.
3 Verify Annunciator G-15, STEAM DUMP ARMED EXTINGUISHED Verify steam dump valves closed.
IF NOT, THEN place STEAM DUMP MODE SELECTOR switch to MANUAL and close valves.
4 Check Main Generator Load GREATER THAN 15 MW IF load can NOT be stabilized above 15 MW, THEN trip turbine and go to AP-TURB.1, TURBINE TRIP WITHOUT RX TRIP REQUIRED, Step 1.
C+
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AP-RCC.3 DROPPED ROD RECOVERY REV:
0 PAGE 4 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 5 Establish Stable Plant Conditions:
a.
Tavg - TRENDING TO TREF b.
PRZR pressure
- TRENDING TO 2235 PSIG
- a. Insert control rods or, if
.necessary, decrease turbine load to match Tavg to Tref.
- b. Verify proper operation of PRZR heaters and spray or take manual control of PRZR pressure controller 431K.
IF pressure can NOT be controlled, THEN refer to AP-PRZR.l, ABNORMAL PRESSURIZER PRESSURE.
c.
PRZR level
- TRENDING TO PROGRAM
- c. Verify proper operation of charging pump speed controllers or take manual control of speed controllers to control PRZR level.
6 Check REGEN Hx Letdown Indications:
o Annunciator A-4, REGEN HX LETDOWN OUT HI TEMP 395'F-EXTINGUISHED o
REGEN Hx letdown outlet temperature
- STABLE OR DECREASING Adjust charging flow and HCV-142 as necessary to control REGEN Hx letdown outlet temperatures IF REGEN Hx letdown outlet temperature can NOT be controlled, THEN perform the following:
a.
Close all letdown orifice valves (AOV-200A, AOV-200B and AOV-202).
- b. Close loop B to REGEN Hx isolation valve (AOV-427).
Ca
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AP-RCC.3 DROPPED ROD RECOVERY REV:
0 PAGE 5 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 7
Check QPTR LESS THAN 1.02 IF QPTR greater than 1.02, THEN computer value should be verified using 0-6.4 to prevent action based on failed computer inputs.
8 Evaluate Control Rod Operability:
- a. Verify MRPI indicates rod on bottom a.
Perform the following:
- 1) Verify all NIS power range channels approximately equal.
IF NOT, THEN defeat failed channel (Refer to ER-NIS.3, PR MALFUNCTION).
- b. Direct I&C to locally investigate rod failure c.
Rod failure identified and corrected DROPPED ROD REPAIRED
- d. Retrieve dropped rod (Refer to ER-RCC.1, RETRIEVAL OF A DROPPED ROD) 2)
Go to Step 9.
- c. Consult Reactor Engineer and Tech Spec 3.10.4.3 for operational concerns.
c~
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AP-RCC.3 T1TLE DROPPED ROD RECOVERY REV:
0 PAGE 6 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED 9
Establish Normal Plant Conditions:
- a. Verify EH control in AUTO IMP IN
- a. IF conditions requiring runback have cleared, THEN place EH in AUTO IMP IN'.
Verify steam dump controller, HC-484, in AUTO at 1005 psig
- c. Verify annunciator G-15, STEAM DUMP ARMED - EXTINGUISHED
- c. IF Tavg within 6'F of Tref, THEN perform the following:
- 1) Ensure steam dump valves closed.
~
d.
Rod insertion limit alarms-EXTINGUISHED e.
NIS PR AI - WITHINi 5%
OF TARGET VALUE
- 2) Reset steam dump.
- d. Borate as necessary and withdraw control rods to clear insertion limit alarms (refer to affected rod bank alarm response procedures if necessary).
- e. Borate/dilute to restore AI to within limits.
- f. Verify charging pump speed control in AUTO
- f. Place charging pump speed control in AUTO if desired.
- g. Verify Rod Control Selector Switch in AUTO
- g. Place Rod Control Selector Switch in AUTO if desired.
Fa
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AP-RCC.3 DROPPED ROD RECOVERY REV:
0 PAGE 7 of 7 STEP ACTION/EXPECTED RESPONSE
RESPONSE
NOT OBTAINED NOTE:
Refer to 0-9.3, NRC IMMEDIATE NOTIFICATION, for reporting requirements.
10 Notify Higher Supervision 11 Return To Procedure Or Guidance In Effect
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