ML20078H514
| ML20078H514 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 10/06/1983 |
| From: | ALABAMA POWER CO. |
| To: | |
| Shared Package | |
| ML19268E147 | List: |
| References | |
| TAC-48973, TAC-52539, TAC-53434, NUDOCS 8310140199 | |
| Download: ML20078H514 (15) | |
Text
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Enclosure Proposed Technical Specification Changes Unit 1 Add.
-Revised Page IV Add Page 3/4 3-72 Add Page B 3/4 3-5
_ Unit 2 Add Revised Page 3/4 3-72 Delete Page 3/4 3-73 8310140199 831006 DRADOCK05000g
INDEX LIMITING CONDITIONS FOR OPERATION A,ND SURVEILLANCE REQUIREMENTS 1
,SECTION PAGE 3/4.2 POWER DISTRIBUTION LIMITS 3/4.2.1 AXIAL FLUX DIFFERENCE................................
3/4 2-1 3/4.2.2 HEAT FLUX H0T CHANNEL FACT 0R.........................
3/4 2-4 3/4.2.3 NUCLEAR ENTHALPY HOT CHANNEL FACT 0R..................
3/4 2-8 3/4.2.4 QUADRANT POWER TILT RATI0............................
3/4 2-11 3/4.2.5 DNB PARAMETERS.......................................
3/4 2-14 3/4.3 INSTRUMENTATION 3/4.3.1 REACTOR TRIP SYSTEM INSTRUMENTATION..................
3/4 3-1 3/4.3.2 ENGINEERED SAFETY FEATURE ACTUATION SYSTEM INSTRUMENTATION....................................
3/4 3-15 3/4.3.3 MONITORING INSTRUMENTATION R a d i a t i on M on i t o ri n g.................................
3/4 3-38 Movable Incore Detectors.............................
3/4 3-42 Sei smi c Moni tori n g Inst rumentati on...................
3/4 3-43 Meteorol ogi cal Inst rumentati on.......................
3/4 3-46 Remote Shutdown Instrumentation......................
3/4 3-49 Ch l o ri ne Detecti on Syst ems...........................
3/4 3-52 Hi gh Ener gy Li ne B reak Sensors.......................
3/4 3-53 Acci dent Moni tori n g I nst rumentat i on..................
3/4 3-56 Fi re Detecti on Inst rumentati on.......................
3/4 3-59 Radi oacti ve Liqui d E f fluent Moni tori ng...............
3/4 3-61 Radi oacti ve Gaseous Ef fluent Moni tori n g..............
3/4 3-66 3/4.3.4 TURBINE OVERSPEED PROTECTION.........................
3/4 3-72 FARLEY-UNIT 1 IV
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INSTRUMENTATION' 3/4.3.4 TURBINE OVERSPEED PROTECTION &
LIMITING CONDITION FOR OPERATION 3.3.4 At least one turbine overspeed protection system shall be OPERABLE.
APPLICABILITY:
MODES 1, 2** and 3**.
ACTION:
a.
With one stop-valve or one governor valve per high pressure turbine steam line inoperable and/or with one reheat stop valve or one reheat intercept valve per low pressure turbine steam line inoperable, restore the inoperable valve (s) to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or close at least one valve in the affected steam line(s) or isolate the turbine from the steam supply within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
b.
With the above' required turbine overspeed protection system' otherwise inoperable, within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> isolate the turbine from the steam supply.
c.
The provisions of Specification 3.0.4 are not applicable.
SURVEILLANCE REQUIREMENTS 4.3.4.1 The provisions of Specification 4.0.4 are not applicable.
- The turbine overspeed protection system will be maintained in accord-ance with the Farley Nuclear Plant " Turbine Overspeed Reliability Assurance Program."
The program will be performed in accordance with
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procedures, maintenance work requests and/or outage work schedules as appropriate.
All deviations from the program or deficiencies identified through the specified maintenance, calibration or testing activities will be evaluated by Alabama Power Company to determine if l
operability of the system has been affected and appropriate l
action taken such as correcting the deviation or l
deficiency, performing compensatory action, or removing the l-turbine from service.
The " Turbine Overspeed Reliability j
Assurance Program" is the subject of on-going review and I
evaluation by Alabama Power Company such that changes in
[
scope and/or schedule may be made as appropriate; however, the objective of_ maintaining the high reliability of the turbine overspeed protection system will be met.
The i-program and any subsequent changes will be reviewed and l-approved as specified in existing plant administrative procedures.
- Specification not applicable with all main steam isolation valves and associated bypass valves in the closed position and all other steam flow paths to the turbine isolated.
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FARLEY - UNIT 1 3/4 3-72 1
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4 INSTRUMENTATION
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'3/4.3.4 TURBINE OVERSPEED PROTECTION I
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, This spec:fication is provided to ensure that the turbine overspeed rp'r'otectionjinstrumentation and the turbine speed control valves are OPERABLE a'nd will protect the turbine from excessive overspeed.
Protection from turbine excessive overspeed is required since excessive overspeed of the turbine could generate potentially damaging missiles which'could impsct and damage safety related components, equipment or structures.
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FARLEY-UNIT 1~
B 3/4 3-5 1
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INSTRUMENTATION-3/4.3.4 TURBINE OVERSPEED PROTECTION
- j LIMITING CONDITION FOR OPERATIUN
'3.3.4 At.least one turbine overspeed protection system shall be OPERABLE.
< APPLICABILITY:
MODES 1, 2** and 3**.
ACTION:
a.
With one stop valve or one governor. valve per high pressure turbine steam line inoperable and/or with one reheat stop valve or one reheat intercept valve per low pressure turbine steam line inoperable, restore the inoperable valve (s) to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or close at least one valve in the affected steam line(s) or isolate the turbine from the steam supply within the twxt 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, b.
With the above required turbine overspeed protection system otherwise inoperable,.within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> isolate the turbine from the steam supply.
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c.
The provisions of Specification 3.0.4 are not applicable.
SURVEILLANCE REQUIREMENTS 4.3.4.1 The provisions of Specification 4.0.4 are not applicable.
- The turbine overspeed protection system will be maintained in accordance with the Farley Nuclear Plant " Turbine Overspeed Reliability Assurance Program."
The program will be performed in accordance with procedures, maintenance work requests and/or outage work schedales as appropriate.
All deviations from the program or deficiencies identified through the specified maintenance, calibration or testing activities will be evaluated by Alabama Power Company to determine if operability of the system has been affected and appropriate action taken such as correcting the deviation or deficiency, performing compensatory action, or removing the turbine from service.
The " Turbine Overspeed Reliability Assurance Program" is the subject of on-going review and evaluation by Alabama Power Company such that changes in scope and/or schedule may be made as appropriate; however, the objective of maintaining the high reliability of the turbine overspeed protection system will be met.
The program and any subsequent changes will be reviewed and approved as specified in existing plant administrative procedures.
- Specification not applicable with all main steam isolation valves and associated bypass valves in the closed position and all other steam 0-flow paths to the turbine isolated.
-FARLEY - UNIT 2 3/4 3-72
F Enclosun Joseph M. Farley Nuclear Plant Turbine Overspeed Reliability Assurance Program
1.0 Ir.troduction and Summary The Alabama Power Company " Turbine Overspeed Reliability Assurance Program" includes a comprehensive program of maintenance, calibration and testing of the turbine overspeed protection system.
This program is based on recommendations by Westinghouse regarding valve maintenance and on operating experience at the Farley Nuclear Plant.
The overall objective of this program is to maintain the high reliability of the turbine overspeed protection system.
The maintenance program is discussed in Section 2.0 and includes inspection and maintenance of the throttle, governor, reheat stop and intercept valves.
The schedule and scope of the inspection and maintenance is in accordance with Westinghouse recommendations.
The calibration program is discussed in Section 3.0 and includes calibration of the turbine overspeed protection system.
Calibration is performed during each refueling outage or following major maintenance on the turbine generator or the overspeed protection system.
The testing program is discussed in Section 4.0 and includes testing of the turbine valves and the turbine overspeed protection system.
Testing is performed during each turbine startup, unless tested within the previous seven (7) days, including startup after each refueling outage.
The testing program includes a complete test of all turbine valves on an approximate interval of four (4) months unless plant operating conditions necessitate an extension to this interval.
The governor, throttle, intercept, and reheat stop valves are in the process of being added to the Nuclear Plant Reliability Data System (NPRDS) in order that deficiencies may be reported and reviewed and appropriate changes may be made in the Farley Nuclear Plant program based on reliability information (Section 5.0).
This comprehensive program is the subject of on-going review and evaluation.
The schedules and/or scope of the maintenance, calibration and testing are subject to revision as appropriate based on operating experience or changes to the manufacturer's recommendations.
The program will be performed in accordance with procedures, maintenance work requests and/or outage work schedules as appropriate.
This program and any subsequent changes will be reviewed and approved as specified in existing plant administrative procedures.
All deviations from the program and deficiencies identified through the specified maintenance, calibration or testing activities will be evaluated by Alabama Power Company to determine appropriate action to be taken such as correcting the deviation or deficiency, performing compensatory action or removing the turbine from service.
2.0 Maintenance Program The maintenance program includes inspection and maintenance of the governor, throttle, intercept and reheat stop valves.
The governor and throttle valves are inspected at least every 39 months and the intercept and reheat stop valves are inspected at least every 60 months.
This schedule is based on a recommendation by Westinghouse, the valves' manufacturer.
Figure 1 shows the schedule for inspection of each of the valves over the next 5 years.
This schedule will be adjusted as necessary based on inspection results during each refueling outage; however, each valve will be inspected within the 39 or 60 month period, as appropriate.
The scope of the inspections and maintenance is discussed below.
2.1 Governor Valve Program The inspection of the governor valves includes removing the valve and bonnet assembly, disassembly of the valve, cleaning the valve components, dust blast and NDE of vital valve components, and repair and replacement of components as required.
This inspection is performed on each governor valve at least every 39 months.
The projected schedule for inspection is shown in Figure 1.
2.2 Throttle Valve Program The inspection of the throttle valves includes removing the valve assembly, disassembly of the actuator and linkage, removal of the valve bonnet and valve assembly, removal of the valve and stem f rom the valve bonnet, dust blast and NDE of components, repair and replacement of components as-required, recording of vital clearances as-found and as-left, and checking seat pins for integrity and condition of peening.
This inspection is performed on each throttle valve at least every 39 months.
The projected schedule for inspection is shown in figure 1.
2.3 Intercept and Reheat Stop Valves Program The inspection of the intercept and reheat stop valves includes removing the valve assembly, disassembly of the spring housing and actuator, disassembly of the valves, removal of the seal assembly, and inspection and repair of parts as necessary.
This inspection is performed on each intercept and reheat stop valve at least every 60 months.
The projected schedule for inspection is shown in Figure 1.
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.,85 m.,
l Tl5EllE/GOERATGt CUTAGE ACTION PLAN
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ESTINATED
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UNIT 11 1
11 I'
ll I
Il I
II I
II I
II I
II I
REFUELING OUTAGE #
1 4
2 5
3 6
4 7
5 8
6 9
7 10 8
11 lpg - MIN TURBINE Y
G Y
Y Y
Y Y
LP2 - NAIN TURBINE Y
G Y
Y Y
Y Y
l HP - MAIN TURBINE G
G X
P X
X
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- 1 - GOVERNOR VALVE S
M X
X X
X X
X X
X i
- 2 - GOVERNOR VALVE S
N X
X X
X X
X X
X
- 3 - GOVERNOR VALVE S
X X
X X
X X
X X
X
- 4 - GOVERNOR VALVE S
X X
X X
X X
X X
X
- 1 - THROTTLE /STOP VALVE X
X X
X X
X X
X
- 2 - THROTTLE /STOP VALVE X
X X
X X
X X
X
- 3 - THROTTLE /STOP VALVE X
X X
X Y
X X
X X
- 4 - THROTTLE /STOP VALVE X
X X
X Y
X X
X X
- 1A - INTERCEPT VALVE X
X X
X R
R X
X R
R X
- 1B - INTERCEPT VALVE X
X X
X X
X X
- 2A - INTERCEPT VALVE X
X X
X X
X X
- 2B - INTERCEPT VALVE X
X X
X X
X X
flA - REHEAT /STOP VALVE X
X X
X X
- 1B - REHEAT /STOP VALVE X
X X
X X
X
- 2A - REHEAT /STOP YALVE X
X X
X X
- 28 - REHEAT /STOP VALVE X
X X
X X
X GENERATOR - FULL INSPECTION X
0 X
X X
X I
GENERATOR - ORAWL THROUGH X
X X
X X
X X
X X
X l
EXCITER - FULL INSPECTION X
X X
X X
X EXCITER - PARTIAL INSPECTION X
X X
X X
X X
X X
X 1
f MSR - TEST & INSPECTION U
U E
F X
X X
X X
X X
X X
X X
X l
A - F.P. TURBINE X
V X
X X
X l
B - F.P. TURBlNE X
X X
X X
IEY X = MlUTIE OUTAGE 191SPECTi(BI/TESTipG R = NIBITRARY (SELECT ONE Gt ICRE AS ECESSARY)
Y = IEPLA(DENT E = MSR IPGtADE P = TILT PAD IEARING INSTALLATION N = ISIFFLER IIISPECTION ONLY 0 = FULL llISPECTION PLUS BLOWER fEPLACEENT G = GLAfD INSPECTION ONLY S = VALVE INSPECTION PLUS 1/3 BAFFLE V = T/S VALVE fEPAIR INSTALLATION, IGJFFLER 300. ADO G400VE 100 B = BACK SEAT & STEM LEAKAGE DIECKS U = BER 100. PLUS OtAtlL TNIU AfD PRESSL5tE TEST IF DISTRESS 1F f0UIO DistlNG AN IIISPECTION OF ANY ITEN, ALL SINILAR ITEMS WILL BE INSPECTED AT THAT IIDTE:
GUTAGE.
Figure 1
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2.4 Example Outage Maintenance Program to this Enclosure is the maintenance program performed on Unit 1 valves during the 4th refueling outage.
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3.0 Calibration Program The turbine electric and mechanical overspeed trip calibration tests are performed at each refueling outage in conjunction with the turbine overspeed and protection device testing described in section 4.2.
The scope of the calibration testing is discussed below.
3.1 Electrical Overspeed Trip Calibration The electrical overspeed trip test is designed to verify calibration of the digital speed indicator on the turbine, the trip value (111.5%) on the turbine overspeed trip channel, and the gap clearance on the speed pickup device.
The as-found values are recorded and compared to expected values.
If any as-found values are out of tolerance, the equipment is adjusted and the testing is repeated.
This testing assures proper calibration of the electrical overspeed trip devices.
3.2 Mechanical Overspeed Trip Calibration The mechanical overspeed trip test is designed to verify calibration of the turbine mechanical overspeed trip system.
The turbine is manually controlled up to 111% of rated speed to observe an actual overspeed trip and the value at which the turbine trip occurs is recorded.
If the as-found trip value is out of tolerance, the trip setpoint is adjusted and the test is then repeated.
This testing assures proper calibration of the mechanical overspeed trip devices.
/
4.0 Testing Program The testing program includes testing the turbine valves and the turbine overspeed protection system.
Testing is performed during each turbine startup, unless tested within the previous 7 days, including startup af ter each refueling outage.
This program also includes a test of all the turbine valves on an approximate interval of four (4) months.
The scope of the testing is discussed below.
4.1 Turbine Generator Startup Testing The turbine generator startup testing is performed during each startup unless performed within the previous seven (7) days.
This testing includes:
a.
Manual Trip Test The turbine is manually tripped from rated speed using the Main Turbine Emergency Trip Switch on the Main Control Board or by use of the hand trip device on the Governor End Pedestal.
Proper operation of the trip system and the turbine valves is verified.
b.
Mechanical Overspeed Trip Device Test
- The appropriate oil pressure is applied to the mechanical overspeed device to verify that the mechanical device functions properly.
The turbine is at rated speed when this test is performed.
The trip signal causes the interface valve to open but the trip oil is blocked such that the turbine does not actually trip.
c.
Overspeed Protection Control (0PC) Test The OPC (103% turbine overspeed protection feature) is tested to ensure proper operation.
The OPC key switch is turned to the test position to verify that turbine governor and intercept valves close.
4.2 Turbine Overspeed and Protection Device Testing **
The turbine overspeed trip system functional test is performed each refueling outage or when major maintenance is performed on the tu rbi n e.
This test involves manually controlling turbine speed up to 111% of rated speed to observe an actual overspeed trip of the turbine.
- Westinghouse recommends that this test be performed monthly.
- Westinghouse recommends that this test be performed every six (6) months.
F 4.3 Shutdown Turbine Trip Verification The shutdown turbine trip verification is performed during each planned shutdown of the unit.
This test requires an Operator to verify by observation that the turbine valves actually close during each planned shutdown.
This test also requires the Plant Operator to verify that the turbine valve positions are properly indicated on the monitor light boxes immediately after each shutdown.
4.4 Turbine Valve Test ***
The turbine valve test is performed on all turbine valves on an approximate interval of four (4) months.
This test requires each of the turbine valves to be cycled to demonstrate free operation as the valves close and reopen.
This test is run from the Main Control Room with an Operator verifying valve operation by direct observation.
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- Westinghouse recommends that this test be performed monthly.
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5.0 Nuclear Plant Reliability Data System (NPRDS) Applicability Alabama Power Company is in the process of adding the Farley Nuclear Plant governor, reheat stop, intercept, and throttle valves to the NPRDS data base.
This process is expectad to be complete by November 1,1983.
In addition, Alabama Power Company will formally request in September 1983 ti.at these vaives be added to the nuclear industry data base.
Alabama Power Company will monitor the reliability of these valves by the results obtained from the NPRDS and Farley Nuclear Plant valve experience. Changes will be made in the " Turbine Overspeed Reliability Assurance Program" as appropriate based on this information.
l 6.0 Conclusion The " Turbine Overspeed Reliability Assurance Program" provides a mechanism to maintain the high reliability of the Farley Nuclear Plant turbine overspeed protection system.
This program is based on recommendatibns by Westinghouse regarding valve maintenance and on actual operating experience at the Farley Nuclear Plant.
This comprehensive program is the subject of on-going review and evaluation such that changes in scope and schedule may occur as appropriate; however, the objective of maintaining the high reliability of the turbine overspeed protection system will be met.
This program and any subsequent changes will be reviewed and approved as specified in existing plant administrative procedures.
All deviations from the program and deficiencies identified through the specified maintenance, calibration or testing activities will be evaluated by Alabama Power Company to determine if operability of the system has been affected and appropriate action taken such as correcting the deviation or deficiency, performing compensatory action or removing the turbine from service.