ML20148Q736
| ML20148Q736 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 09/09/1977 |
| From: | Curran J SOUTHERN CALIFORNIA EDISON CO. |
| To: | |
| Shared Package | |
| ML20148Q696 | List: |
| References | |
| S-V-2.14, TAC-07099, TAC-7099, NUDOCS 8802010185 | |
| Download: ML20148Q736 (11) | |
Text
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y f*j SAN ONOFRE NUCLEAR GENERATING STATION ENGINEERING PROCEDURE S-V-2.14 September 9, 1977 4
INSERVICE TESTING OF PUMPS I.
OBJECTIVE This procedure defines the inservice testing requirements for ASME Code Class 1, 2 and 3 pumps at San Onofre Unit 1 and assures compliance with Technical Specification 4.7.
It is furthermore intended that this procedure meet the requirements of ASME Code and Addenda in effect as of July 1, 1977 (Reference 1) to the maximum extent practical.
II. CONDITIONS A.
The testing requirements of this procedure are to be perfonned in compliance with the requirements of Reference 1 to the maximum extent practical.
B.
The pump inservice testing program delineated herein covers a ten year inspection interval commencing on January 1, 1978, and terminating on December 31, 1987.
C.
The requirements of this procedure remain in effect for a maximum period of twenty (20) months, consnencing)on January 1, 1978.
Prior to the expiration of the twenty (20 month period the pump inservice testing program shall be reviewed and revised as necessary in accordance with the requirements of 10 CFR 50.55a(g).
D.
Class 1, 2 and 3 pumps, as defined in IWP-1100 of Reference 1, are itemized in Table 4A of Reference 2.
E.
The Section XI requirements apply only to selected pumps that can be tested without placing the plant in an unsafe condi-tion.
Therefore, care should be exercised that no test will be conducted while the plant is in an operating mode that would make it vulnerable to a test failure.
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3 SAN ONOFRE NUCLEAR GENERATING STATION ENGINEERING PROCEDURE S-V-7.14 September 9, 1977 Page 2 III INTRODUCTION The hydraulic and mechanical condition of a pump relative to a previous condition can be detemined by attempting to duplicate by test a set of basic reference parameters.
Deviations detected are symptoms of changes and, depending upon the degree of deviation, indicate need for further tests or corrective action.
A.
Detection of Hydraulic Change Rotative speed, flowrate, and differential pressure are basic parameters which, when a pump is operating with adequate suction conditions describe the hydraulic characteristics of a pump. These parameters are related by the functional equation 6P=f(Nm,cp)
During test when the values of any two of these parameters are adjusted to reference values the value of the third parameter is established.
If the test data indicates that a deviation from a previous reference value has occurred and all test data is correct, a change has taken place in the hydraulic components of the pump which may warrant corrective action.
Thus, there is the requirement to measure these basic parameters.
B.
Detection of Mechanical Change Vibration and bearing temperature are two basic parameters which describe the mechanical characteristics of a pump.
Values determined under a specific dynamic load, i.e. speed, differential pressure, and flow rate, should be duplicated in future tests under similar load cunditions.
Deviations from reference values may indicate changes in the mechanical com-ponents which may warrant corrective action. Thus, there is the requirement to measure these basic parameters.
IV. REQUIREMENTS A.
The attached Table P specifies each pump subject to the inservice testing requirements of Section XI.
Each inservice test shall include the measurement or observation of all quantities listed in Table P except bearing temperatures which shall be measured during at least one inservice test each year.
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SAN ONOFRE NUCLEAR GENERATING STATION ENGINEERING PROCEDURE S-V-2.14 September 9, 1977 Page 3 3
B.
Each pump shall be tested nominally at the frequency specified under the column "Test Frequency".
It is recommended that this test frequency be maintained during shutdown periods where this can reasonably be accomplished, although this is not manda-tory.
If it is not tested during plant shutdowns, the pump shall be tested within one week after the plant is returned to normal operation.
C.
Reference values are defined as one or more fixed sets of values of the quantities shown in Table P as measured or observed when the equipment is known to be operating acceptably. All subse-quent test results shall be compared to these reference values or to new reference values established in accordance with sub-paragraphs 1 and 2 below.
Reference values shall be determined from the results of the first inservice test run.
Reference values should be at points of operation readily duplicated during subsequent inservice testing.
1.
Effect of Pump Replacenent, Repair and Routine Servicing on Reference Values After a pump has been replaced, a new set or sets of reference values shall be determined from the results of the first inservice test run after the pump is put into service.
When a reference value or set of values may have been affected by repair or routine servicing of the pump, a new reference value or set of values shall be determined or the previous value reconfirmed by an inservice test run prior to or within 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> after return of the pump to normal service.
Deviations between the previous and new set of reference values shall be identified and verification that the new values represent acceptable pump operation shall be placed in the pump record.
2.
Establishment of ar 5dditional Set of Reference Values should it be necessary or desirable for some reason other than stated in subparagraph 1 to establish an additional set of reference values, an inservice test shall first be run at the conditions of an existing set of reference values and the results analyzed.
If operation is satis-factory, a second test run at the new reference conditions shall follow as soon as practical.
The results of this test shall establish the additional set of reference values.
Whenever an additional set of reference values is established the reasons for so doing shall be justified and documented in the pump record.
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SAN ONOFRE NUCLEAR GENERATING STATION ENGINEERING PROCEDURE S-V-2.14 September 9, 1977 Page 4 D.
Instrumentation used during test runs shall meet the requirements of IWP-4000 of Section XI to the maximum extent practical.
E.
Test Duration 1.
When measurement of bearing temperature is not required, each pump shall be run for at least five minutes under conditions as stable as the system permits. At the end of this time at least one measurement or observation of each of the quantities specified shall be made and recorded.
2.
When rea1urement of bearing temperature is required, each pump shall be run until the bearing tempcratures stablize, and then the quantities specified shall be measured or observed and recorded. A bearing temperature shall be considered stable when three successive readings taken at ten minute intervals do not vary by more than 3%.
V.
ANALYSIS A.
All test data shall be analyzed within 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> after completion of a test.
B.
The allowable ranges of inscryice test quantities in relation to the reference values, are tabulated in Table IWP-3100-2 of Section XI.
In the event these ranges can not be met the pump record shall specify the reduced range limits to allow the pump to fulfill its function and those limits shall be used in lieu of the ranges given in Table IWP-3100-2.
VI.
CORRECTIVE MEASURES A.
If deviations fall within the "Alert Range" of Table IWP-3100-2, the frequency,f testing shall be doubled, if possible, until the cause of the deviation is determined and corrected and either the existing reference values reverified or a new set established.
B.
When subsequent tests show deviations greater than allowed (see Table IWP-3100-2), the instruments involved may be recalibrated and the test rerun.
C.
If the deviations fall within the "Required Action Range" of Table IWP-3100-2 an analysis of the pump's ability to perform its required function shall be undertaken.
If the results of this analysis show the pump unable to perform as required, it shall be declared inoperative and the condition corrected. The corrective action is considered complete when a satisfactory inservice test has been completed.
SAN ONOFRE NUCLEAR GENERATING STATION ENGINEERING PROCEDURE S-V-2,14 September 9, 1977 Page 5 VII RECORDS Records pertaining to inservice testing of pumps shall be maintained in accordance with Article IWP-6000 of Section XI. These records shall include as a minimum the following:
1.
Summary Listing 2.
Pump Records 3.
Inservice Test Plans 4.
Records of Tests 5.
Records of Corrective Action VIII. EXCEPTIONS The Section XI pump testing requirements are intended to apply to pumps that can be tested without placing the plant in an unsafe condition. Additionally, due to the as-built condition of the plant or operational considerations, it is not practical in some cases to measure all test parameters or run pumps to the extent required.
These limitations, where applicable, are noted in Table P.
j IX REFERENCES 1.
American Society of Mechanical Engineers (ASME),
Boiler and Pressure Vessel Code Section XI,1974 l
Edition, including Addenda through Summer,1975.
2.
San Onofre Nuclear Generating Station, Unit 1 I
Classification of ASME Class 1, 2 and 3 Systems and j
Components, including Addendum 1.
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dhr1 J. M. Curran Plant Manager GTM/yc 4
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TABLE P_
PUf1P INSERVICE TESTING PROGRAM TEST PUMP TEST QUANTITIES FREQUENCY REHARKS OUTLET OR INLET DIFFERENTIAL FLOW BEARING LUBRICAN1 PRESSURE PRESSURE RATE VIBRATION TEtFERATURE LEVEL OR Pi t.P. Po Q
V Tb PRESSURE FEEDWATER PUMPS G-3A (East)
Yes Yes Yes Yes Yes Yes Monthly Note 1 G-3B (West)
Yes Yes Yes Yes Yes Yes Monthly CHARGING PUMPS G-8A (North)~
Yes Yes Yes Yes Yes Yes tionthly Note 2 G-8B (South)
Yes Yes Yes Yes Yes Yes
- Monthly RESIDUAL HEAT
_RE_M0 VAL PUMPS G-14A (East)
Yes Yes Yes Yes Yes Yes Refueling outages G-14B (West)
Yes Yes Yes Yes Yes Yes Refueling outages 4
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TABLE P PUMP INSERVICE TESTING PROGRAM TEST PUMP TEST QUANTITIES FREQUENCY REMARKS OUTLET OR INLET DIFFf.RENTIAL FLOW BEARING LUBRICANT PRESSURE PRESSURE RATE VIBRATION TEMPERATURE LEVEL OR Pi AP, Po Q
V Tb PRESSURE REFUELING WATETt PUMPS G-27N (North)
No No No No No No Monthly Note 3 G-2?S (South)
No No No No No No Monthly SAFETY INJECTI RECIRCULATION PUMPS G-45A (East)
No No No No No No Monthly Note 4 G-458 (West)
No No No No No No Monthly SAFETY INJECTI(W PUMPS G-50A (East)
Yes Yes No Yes No Yes Monthly Note 5 i
G-S0B (West)
Yes Yes No Yes No Yes Monthly s
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l TABLE P l
PUMP INSERVICE TESTING PROGRAM l
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TEST PUMP TEST
_ QUANTITIES FREQUENCY REMARKS l
OUTLET OR INLET DIFFERENTIAL FLOW BEARING LUBRICANT PRESSURE PRESSURE RATE VIBRATION TEMPERATURE LEVEL OR l
Pi AP, Po Q
V Tb PRESSURE HYDRAZINE SPRAY PUMPS G-200A Yes Yes Yes Yes No Yes Monthly Note 6 G-2008 Yes Yes Yes Yes No Yes Monthly SPENT FUEL PIT PUMP G-5 Yes Yes No Yes Yes Yes Monthly Note 7 AUXILIARY FEEDWATER PUNPS G-10 Yes Yes No Yes No Yes Monthly Note 8 G-105 Yes Yes No Yes No Yes Monthly Note 9 7
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TABLE P PUMP INSERVICE TESTING PROGRAM TEST PUMP TEST QUANTITIES FREQUENCY REMARKS OUTLET OR INLET DIFFERENTIAL FLOW BEARING LUBRICANT PRESSURE PRESSURE RATE VIBRATION TEMPERATURE LEVEL OR Pi a P, Po Q
V Tb PRESSURE SALTWATER COOLING PUMPS G-13A (North)
Yes Yes Yes No No No llonthly Note 10 G-138 (South)l Yes Yes Yes No No No Monthly 1
COMPONENT COOLING WATER PUMPS G-15A (North)
Yes Yes Yes Yes No Yes Monthly Note 11 G-158 (Center:
Yes Yes Yes Yes No Yes Monthly G-15C (South);
Yes Yes Yes Yes No Yes Monthly s
41 m
TABLE P 3
PUMP INSERVICE TESTING PROGRAM NOTES AND CLARIFYING REMARKS YES Indicates quantity can be measured or observed.
NO Indicates quantity not available for measurement.
NOTES Note 1 During normal operation both feedwater pumps discharge into a cormion header; flow is dependent on station load. Feed-water flow (as measured by FE 456, FE 457 and FE 458) is can not be readily adjusted to reference values. parallel and indicative of both feedwater pumps operating in Pumps should be tested at or near plant full power operation.
Note 2 Charging pump flow, as indicated on FI-1112, is modulated by the pressurizer level control system.
Ther'afore, flow is dictated by plant operating conditions and can not be readily adjusted to reference values.
Pumps should be tested when the plant is at or near steady state operation.
Note 3 Operation or the refueling water pumps for a sustained period may place tie plant in an unsafe condition.
Failure of either of two auttnatic valves can cause sphere spray to be initiated.
TherequirementsofTechnicalSpecification4.2.II.B(2)shall be used in lieu of the Section XI pump testing requirements.
This requires that each pump be capable of naintaining 90% of its rated stutoff head, demonstrated on a monthly basis.
Nose 4 The recirculation pumps can only be run dry during nonnal plant or.etationt..
It is therefore not possible to perform the pump tests required by Section XI.
The requirements of Technical Specification 4.2.II.B(3) shall be used in lieu of the Section XI pump testing requirements.
This requires that proper starting of each pump be confirmed by observation of running current, demonstrated on a monthly basis.
l TABLE P - PUMP TEST PROGRAM PAGE 2 Note 5 Inlet pressure to the safety injection pumps may be calculated from RWST level since no inlet pressure taps are provided at the pump suction.
Pumps are tested while in the recircula-tion mode. There is no instrumentation provided to measure flow or bearing tenperature.
Note 6 Inlet pressure to the hydrazine spray punps may be calculated from hydrazine tank level (including ovirpressure) since no inlet pressure taps are provided at the pump suction.
No instrumentation is provided for bea"ing temperature measure-ment.
Note 7 Inlet pressure to the spent fuel pit pump may be calculated from spent fuel pit level since no inlet pressure taps are provided at the pump suction.
No instrumentation is provided to measure pump flow.
Note 8 Inlet pressure to the auxiliary feedwater pumps may be calculated from condensate storage tank level since no inlet pressure taps are provided at the pump suction.
No instrumentation is providea to measure flow or bearing temperature.
Note 9 The speed, N of the steam driven auxiliary feed pump shall be included as a test quantity.
Note 10 The saltwater cooling pumps are of the vertical turbine type and are submerged.
Inlet pressure must be calculated from intake structure level.
Pump bearings are water lubricated and not accessible for vibration testing. Additionally, the flow of the pump is dependent on plant operating conditions and cannot be readily adjusted to reference values.
Note 11 Inlet pressure to the component cooling water pumps may be calculated from surge tank level since no inlet pressure instru-1 mentation is provided. Flow rate is measured (FI-606) on the common discharge header of all three pumps.
Pumps should be j
run individually for test, as plant conditions pennit, i
No instrumentation is provided to measure bearing temperature.
i GTM/yc 8/2/77 i
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