ML20064H901

Rev 10 to Section 3.0 of IST Program Plan for Pumps.

ML20064H901
Person / Time
Site:	Byron
Issue date:	03/11/1994
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20064H899	List: ML20064H895 ML20064H901 ML20064H910
References
PROC-940311, NUDOCS 9403180197
Download: ML20064H901 (56)

Text

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t SECTION 3.0 INSERVICE TESTING PROGRAM PLAN FOR' PUMPS rr 9403180197 94031i V:

PDR ADOCK 05000454 5 P PDR s

Rev. 10 l

l Table of Contents 3.0- Inservice. Testing Program Plan for Pumps 3.1 Program Description 3.2 Program References 3.3 Program Tables 3.4 Notes Note 1 " Deleted" Note 2 Pumpe Lubricated by Pumped Fluid Note 3 Pump Idle'Suetion Pressure Note 4 " Deleted" (incorporated into PR-6)

Note 5 Essential Service Water Make Up Pumps Inlet and Differential Pressure Note 6 " Deleted" .

Note 7 Boric Acid Transfer Pumps 3.5 Relief Requests PR-1 Pump Vibration PR-2 Pump Bearing Temperatures PR-3 " Deleted" PR-4 " Deleted" PR 5 Use of Ultrasonic Flowmeters PR-6 Diesel Oil Transfer Pump Differential Pressure PR-7 SX Pump Vibration (9999D/WPF/021794) 3.0 - page'l of 1

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SECTION 3.1 PROGRAM DESCRIPTION 3

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- l Rev. 10 PROGRAM DESCRIPTION 3 I

The Pump Inservice Testing (IST) Program Plan for Byron Nuclear Power Station Unit 1 and 2, is imp 3emented.in accordance with the requirements I of Subsection IWP of Section XI of'the ASME Boiler and Pressure Vessel

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l Code, 1983 Edition, through the Summer of 1983 Addenda. Where these -l requirements are determined to be impractical, specific relief is requested. Additional pump relief requests may be necessary and these J will be identified during subsequent inservice tests. _ Byron Station ..  ;

received a Safety Evaluation Report (SER) on September 15, 1988 and is listed in Table 2 of NRC Generic Letter 89-04 as a plant with a reviewed IST Program and SER issued. Per NRC Generic Letter.89-04, the status of relief requests as stated in the SER is unchanged. Any modifications to-Byron Station relief requests approved in the SER (PR 1 through PR-5),  ;

, which are covered by one of the eleven positions discussed in NRC Generic Letter 89-04 Attachment 1, must be performed in accordance with the guidelines given in the Generic Letter. Pre-approval is granted for all relief requests submitted which are consistent with the eleven positions given. New relief requests dealing with a position D21-covered by NRC Generic Letter 89-04, Attachment 1, must receive NRC approval prior to implementation. The pumps subject to ISI testing are those pumps which are identified in accordance with the scope of ASME Section XI, subsection IWP-1100: "IWP-1100 SCOPE... This Subsection provides the' rules and requirements for inservice testing of Class 1, 2, and 3 centrifugal and displacement type pumps that are' installed in light-water cooled nuclear power plants, that are required to perform a specific funct on in shutting down a reactor or in mitigating the consequences of an accident, and that are'provided with an emergency power source. The results of these test are to be used in assessing operational readiness of the pumps during their service life."

The only exceptions are the diesel driven auxiliary feedwater pumps (1AF01PB and 2AF01PB), and essential service water makeup pumps (OSX02PA' and OSXO2PB), which are not supplied by an emergency power source. The diesel oil transfer pumps (1/2DOO1PA, 1/2DOO1PE, 1/2DOO1PC and 1/2DOO1PD) are classified non-ASME Class G.

Pump reference values shall be determined from the results of.a preservice test, which may be run during preoperational testing, or from the results of the first inservice test run during power operation.

Reference values shall be at points of operation.readily duplicated during subsequent inservice testing. Additional reference values may be' necessary and these will be taken in accordance with IWP-3111 and 3112:

1. After a pump has been replaced,

2. When a reference value or set of values may have been affected by repair or routine servicing of a pump, or

3. If it is necessary or desirable for some other reason that 1 or 2 above.

(9999D/WPF/021794 ) 3.1 - page 1 of 2

Rev. 10 Per'NRC Generic Letter 89-04, Attachment'1, Position #8, whenever pump data is determined to be within the Required Action Range, the pump is inoperable, and the Technical Specification LCO Action statement time. ,,

starts.

In the event a pump must be declared inoperable as a result of' inservice testing, limitations on plant operation will be as stated in the Technical Specifications.

Section XI of the ASME Boiler and Pressure Vessel Code shall not be construed to supersede the requirements of any Technical Specification.

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(9999D/WPF/021794) 3.1 - page 2 of 2

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i SECTION 3.2 PROGRAM REFERENCES 4

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Rev. 10 I

FEFERENCES  ;

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1. Title 10, Code of Federal Regulations, Part 50, Domestic Licensing of Production and Utilization ' Facilities, particularly Section 50.55a, Codes and Standards.

2. ASME Boiler and Pressure Vessel Code,Section XI, Rules for Inservice Inspection of Nuclear Power Plant Components, 1983 Edition, Summer 1983 Addenda.

3. ASME/ ANSI OM-1987, Operation and Maintenance of Nuclear Power Plants,.

including 1989 Addenda, Part 6, Inservice Testing of Pumps in Light Water Reactor Power Plants.

4. U.S. Nuclear Regulatory Commission, Generic Letter 89-04, Guidance on-Developing Acceptable Inservice Testing Programs.

5. Byron /Braidwood Station UFSAR, Section 3.9.6.1, Inservice Testing of.

Pumps.

6. Byron Station Technical Specification, 3/4.0.5, Generic ASME Program Requirement.

7. Byron Technical Staff Procedure, BVP 200-1, ISI Requirements for Pumps. ,

8. NRC Safety Evaluation Reports (SER's) :

a. 09/15/88 (Initial Program Plan Review)

b. 09/14/90 (Supplemental Program Plan Review)

c. 01/31/92 -(Supplemental Program Plan Review) lJ

9. Byron Station IST Pump Program Plan Review Responses (file: 3.11.0240):

a. Byron Letter 88-1321.- (Initial Program Plan Review ' Response) ,

b. Byron Letter 90-0724 .(Supplemental Program Plan Review Response)

c. Byron Letter 93-0047 (Rev. 9b, Submitted in Response to -

SER 01/31/92) l

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(9999D/WPF/021794)

'3.2 - page 1 of 1

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SECTION 3.3 .

PROGRAM TABLES i

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Rev. 10 TABLE DESCRIPTION l

The following information is included in the summary tables:

The first four columns include the unique Byron' Station Equipment Piece .

Number, tha Pump Name, the Code Class, and the system P&ID for the pump listed.

Soeed: Speed will be measured by a tachometer for variable speed drives.

Inlet oressure: Inlet pressure will be measured via permanently installed {

gauges or other means, provided the equipment accuracy meets the requirements l of IWP-4150. This is to be measured both before pump startup and during the test. j Differential oressure: Differential pressures will be measured using calibrated differential pressure gauges or by recording the difference between '

calibrated inlet and outlet pressure gauges.

Flow rate: Flow rates will be measured using permanently installed instrumentation or other means, provided that equipment accuracy meets the i requirements of IWP-4150.

Vibration: Vibration measurement shall be made using portable or hand held instruments at locations as marked on the pumps.

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Bearino Temperature: Bearing temperature will be measured by permanently 'j installed devices where such devices are present. Portable measurement devices will be used where temperature wells are provided.

Per'IWP-3300, bearing temperatures are required only once per year Byron j Station takes the data for bearing temperatures once per year during summer '

testing and follcwing maintenance on a pump if bearing temperatures may have -

been affected.

Test Interval: An inservice test shall be run on each pump nominally every 3 months during normal plant operation, in accordance with IWP-3400, except during periods when the pump is not required to be operable.

Lubrication Levell Lubrication level will be observed through sight glasses for the pumps listed in the program.

l Revision: The current revision of the program is listed. l Table Pace: The table : eJes are numbered sequentially and show the total number of pages.

(9999D/WPF/021794) 3.3 - page 1 of 1 i

-i INSERVICE TESTING FROGRAM PLAN

- CLASS 1, 2. 3 AND AUGMENTED PUMPS SYRON NUCLEAR POWTR STATION UMTS0,1,2 Revison 10 C TEST PARAMETERS L

A S INLET OtFF FLOW BEARING TEST LUBRICATION PUw NUhEER PUMP NAME S P&lO SPEED PRESS PRESS RATE VIBRATION TEMP INTERVAL LEVEL REMARKS 1AF01PA Aux 4wy Feedwater 3 M37 No Yes Yes Yes PR-1 PR 2 Ouwterfy Yes Pump (Motor) 1AF01PB Avu4ery Feedwatw 3 M37 Yes Yes Yes Yes PR- 1 PR-2 Overtory Yes Purm (Diessil 1 2AF01PA Auxeery Feeuwster 3 M122 No Yee Yee Yes PR- 1 PR2 Quarterly Yes Pump {Motori I

j 2AF01PB Aux &ary Feedweter 3 M122 Yes Yes Yes Yes PR-1 PR-1 Ouartch Yes e oesee [

OCC01P Component Coolmg 3 M66 No Yes Yes PR5 PR-1 PS2 Quarterly Yes Note 3 Pump 1CC01PA Component Coolmg 3 M66 No Yes Yes PR5 PRI PR2 Quwtcly Yee Note 3 Pwrp 1CC01PB Cornponent Coolmg 3 M66 No Yes Yes PR5 PRI PR 2 Quarter 9 Yes Note 3 l

2CC01PA Component Cochng 3 M.66 No Yes Yes PR5 PR-1 PR- 2 Overterly Yes Note 3 Pump 2CC01PB Component Coohng 3 M68 No Yes Yes PR$ . PR- 1 PR2 Quaterfy Yes Note 3 Pune >

1CS01PA Contemrnent Sprey 2 4 46 No Yes Yes Yee DR1 PR2 Quartwiy No Note 2 Pump ICS01PB Contamment Sprey 2 M46 No Yes Yes Yes PR1 PR2 Quarterly No Note 2 pump 3.3 PUMP TABLES - Pege 1 of 4 I

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INSERVICE TESTEdG PROGRAM PLAN CLASS 1,2,3 AND AUGMENTED PUMPS BYRON NUCLEAR POWER STATlON UNITS O.1. 2 'r Roween 10 C TEST PARAMETERS L

A S INLET - DIFF FLOW BEARING TEST LUBMCATION PUfW NUMBER PUMP NAME S P&lO SPEED FbS PRESS RATE V1BRATION TEMP INTERVAL LEVEL REMARKS 2CSOIPA Contomment Scroy 2 4129 No Yes Yes Yes 6%1 F% 2 Ouwtery No Note 2 Pump 2CS01PB Contenrnent spesy 2 4 129 No Yes Yu Yu PR1 F%2 Ouwteh No Note 2 -

, Pump 1CVO1PA Contidugal Chwgeg 2 4 64 No Yes Yes PR 5 5%1 F%2 0.serterY Vee pump 1CVO1PB Centnfuget Chwgeg 2 M64 No Yes Yes PR5 f%1 1%2 Ouwterly Yes Purve 2CV01PA Centnfugal Chwgeg 2 M 138 No Yes Yes PR 5 F%1 F% 2 Ouwtely Yes Pump i 2CVQ1PB Centadugd Chageg 2 4 138 No Yes Yes F%5 FR1 FR2 OuwtwV Y es

, Pume 1DOO1PA Dud Od Tienste 3 M 50 No Yes PR-6 3%5 r%1 F% 2 Ouwter9 No Note 2 i Pump 1DOO1FS O ud Od Transfw 3 MSO No Yes PR S F% 5 PR.1 F%2 Ouwtw9 No Note 2 1DOO1PC Die d Od Tsenster - 3 M do No Yee PR6 5%5 F%1 PS2 Ouwterly No Note 2 Pump IDOO1PD Duel Od Trensf er 3 M50 No Yu PR6 M5 PRI F%2 Ouwtw9 No Note 2 Pure, 2OOCIPA Desd OJ Transfer 3 M130 No Yes PR6 FR5 F%1 f%2 Ouwtw4 No Note 2

~ l 3.3 PUMP TABLES . Page 2 ef 4

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INSERVICE TESTING PROGRAM FtAN CLASS 1,2,3 AND AUGMENTED M>MPS BYRON NUCLEAR POWER STATION UNITS 0,1, 2 Revimon 10 C TEST PARAMETERS L

A I S INLET OtFF FLOW BEARING TEST LUBf4 CATION PUhP NUMBER PUM* NAME $ P&lD SFTTD PRESS PRESS RATE V1 BRAT 10N TEMP INTERVAL LEVEL REMARKS 2DC01PB Desel Od Transfw 3 M130 No Yes PR 6 PR5 PR-1 PR 2 Ouwtwh No Note 2 Pump 2DOO1PC Dessi Od Transfw 3 4130 No Yee PR6 PR5 PR-1 PR2 Ouwtety No Note 2 Pump 20001PD Dnel Od Transfw 3 4130 No Yes N6 PRS PR1 PR. 2 Overtely No Note 2 Pu"9 1RH01PA Reedual Heat 2 4 62 No Yes Yes Yes PRI PR2 Ouwtwly No Note 2 Removal F%mp 1RH01PB Reedual Heat 2 M62 No Yes Yes Yes PRI PR2 Quartwtw No Note 2 Removal Purm 2RH01PA Residual Heat 2 M137 No Yes Yes Yes PRI PR2 Overtwy No Note 2 Remowat Purm 2fN01PB Resdual Heat 2 4137 No Yes Yes Yes PS) PR2 Ouarterly No Note 2 l Removal Pump IS401PA Safety i% ort 2 M61 No Yes Yes Yes PRI PR2 Ouwtwty Yes Pi mp 1$101PB SantY hection 2 M61 No Yes Yes Yes PR1 PR2 Ouwtwty Yes Pune 2SIO1PA Sofety Iriection 2 M136 No Yes Yes Yes PRI PPr 2 Quarterly Yes Pump 2St01PB Safety hection 2 M136 No Yes Yes Yes PR1 PR2 Quwterly Yes Putm 3.3 PUhF TABLES Pege 3 of 4 t

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INSERVICE TESTING PROGRAM PLAN CLASS 1. 2. 3 AND AUGMENTED PUMPS BYRON NUCLEAR POWER STATerp4 UNITS 0.1,2 Reveson 10 C TEST PARAMETERS t.

A i l S INLIT DIF F FLOW BEARING TEST LUBRICATION PUMP NUMBER PUMP NAME S P&lO SPEED PRFSS PRESS 9 ATE VtBRATION TEMP INTERVAL LEVEL REMARKS OSXO2PA Essen. Servwe Weter 3 M-4 2 Yes Yes Yes PRS PR7 PR- 2 Quarterly Yu Note 5 Makeup Pump (Diese4 -'e CSXO2FS Essen. So vice Weter 3 M42 Yu Yes Yes PR5 PR7 PR2 Quarterly Yes Note 5 Mekeup Pump Desell ISX01PA Essentiel Service 3 M 42 No Yes Yes PRS PR-1 PR 2 Quartwly Yes Note 3 Weter Pump 1SX01P9 Essentiel Sevice 3 M42 No Yes Yee PR 5 PR1 PR2 Our:twty Yes Note 3 Water Purnp 2SX01PA Essentiet Service 3 M 42 No Yes Yes PR.5 PR1 PR 2 Querterly Yes Note 3 i Wetw Pump 2SX01PB Essentiel Service 3 4 42 No Yes Yes PR-5 PR1 PR2 Quarte @ Yes Nde3 We,or %

1SXO4P 18 AFW SX 3 M42-3 Yes Yes Yes Yes PR1 PR- 2 Quorter4 Yes Boostw Pump 2SXO4P 29 AFW SX 3 M 125-1 Yes Yee Yes Yu PRI PR2 Ouwterly Yes Boostw Pump OWOO1PA Control Room 3 M118 No Yu Yes Yes M1 PR2 Overtw'y Yes Note 3 Chaed Water Pump OWOO1PB Control Room 3 M118 No Yes Yes Yes M1 PR2 Quarter 4 Yes Note 3 Chdod Water Pump l

3.3 PUMP TABLES - Page 4 of 4 l

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- SECTION 3.4 NOTES l

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Rev. 10 NOTE 1

" Deleted" NOTE 2 The Diesel Oil Transfer (1DOO1PA-D and 2DOO1PA-D), Residual Heat Removal (1RH01PA, D and 2RH01PA, B) and Containment Spray (ICS01PA, B and 2CS01PA, B),

pumps cannot be measured for lubrication level. These pumps ire lubricated by-the fluid pumped and hence have no indication for lubrication level.

NOTE 3 The Component Cooling Water pumps (OCC01P, ICC01PA, B and 2CC01PA, B),

Essential Service Water Pumps (ISXO1PA, B and 2SX01PA, B), and-the Control Room Chilled Water Pumps (OWOO1PA, B) are in systems which are in continuous operation. The idle inlet pressure for these pumps cannot be obtained without interrupting normal system operation and causing system transients. The idle inlet pressure will be recorded only if the pump to be tested is not in 4 . operation at the start of the test. Proper pump operation is assured by continuous pump operation as well as quarterly monitoring of the remaining ISI pump parameurs.

NOTE 4

" Deleted" NOTE 5 2 The essential Service Water Make Up pumps (OSX02PA and OSX02PB) are rubmerged,.

vertical well type pumps. They take their suction from a River Screen House (RSH) forebay. The inlet suction pressures for the pumps can not be measured in as much as they are well type pumps. Futhermore, inlet pressure shall be' calculated from a difference of river and pump level. .The allowable range of the inlet pressure shall be determined from high and low river levels specified in the Technical Specifications and' pump vendor information.

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. i Rev. 10 NOTE 7.

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~ The Boric Acid Transfer Pumps fall outside the scope of the IST Pump Program statement of the ASME Code Section XI, paragraph IWP-1100 because they are not provided with an emergency power source and Byron Station is analyzed as a

" hot shutdown" plant and these pumps are not required to maintain hot shutdown conditions. Also, the RWST (Refueling Water Storage Tank) is a Seismic Category I Structure as described in the UFSAR Table 3.2-1. Paragraph 3.2.1.1 states that Seismic Category I Structuren are designed-to withstand design basis accidents including tornadoes. Therefore, the Boric Acid. Transfer Pumps are not required to be' included in the IST Program to satisfy any Design Basis Accident. Engineering. correspondence CHRON # 161733 dated January 17, 1991 supports these conclusions. However, because of the operating significance of these pumps, Byron Station is developing a testing program for these pumps outside the IST Program.

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i SECTION 3.5 RELIEF REQUESTS

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Rev. 10 4

RELIEF REQUEST NO. PR-1

1. PUMP NUMBER: All pumps in the program plan.

2. NUMBER OF ITEMS: 42 pumps.

3, ASME CODE CLASS: 2&3

4. ASME CODE. SECTION XI REOUIREMENTS:

In referenceLto Table IWP-3100-2, " Allowable Ranges of Test Quantitles",

pump vibration is to be measured in and compared to values given in mils displacement.

5. BASIS FOR RELIEF:

The measurement of pump vibration is required so that developing '

problems can be detected and repairs initiated prior to a' pump.becoming ,

inoperable. Measurement of vibration only in displacement. quantities,.

as required by the ASME Code, does not take into account frequency which is also an important factor in determining the severity of the vibration, i

6. ALTER.NATE TESTING:

The ASME. Code minimum standards require measurement of the vibration [

amplitude in mils (displacement). Byron Station proposes an alternate -i program of measuring vibration velocity (inches per second) which is more comprehensive than-that required by Section XI. This technique is ,

an industry-accepted method which is much more meaningful and sensitive [

to small changes that are indicative.of developing mechanical problems.  :

These velocity measurements detect not only high amplitude vibration, that indicates a major mechanical problem such au misalignment'or unbalance, but also the equally harmful. low amplitude,.high frequency vibration due to bearing wear that usually goes undetected by simple displacement measurements.

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The allowable ranges of vibration and their associated action levels

• will be patterned aftei the guidelines established in ANSI /ASME ONb-1989, Part 6, Table 3 and Table 3a. These ranges will be used in -;

whole to assess equipmett operational readiness for all . components except the Essential Service Water Make-Up Pumps ~ 0SXO2PA & B' (see PR-7) . 'l (9999D/WPF/021794) 3.5.- page 1.of 13

Rev. 10 The acceptable performance range for all components (except the Essential Service Water Make-Up Pumps OSX02PA & B) will be as follows:

Acceptance Alert Required Action Range Range Range (in/sec) (in/sec) (in/sec)

Vs2.5Vr 2.5VrcVs6.0Vr V>6.0Vr and or or V<0.325 0.325<V<0.700 V>0.700 For all pumps, evaluation of data, to assign equipment to the Alert or Required Action ranges, will be done immediately per the requirements of NRC Generic Letter 89-04, Attachment 1, position 8. This will be done using industry accepted vibration analysis equipment, such as a full spectrum analyzer.

Vibration measurements for all pumps will be obtained and recorded in velocity, inches per second, and will be broadband unfiltered (filtered-out (IRD) or total (TEC Smart meter)) peak measurements. The monitored locations for vibration analysis will be marked so.as to permit subsequent duplication in both location and plane.

The frequency response range of the vibration transducers and their readout system shall be capable of frequency responses from one-third minimum pump shaft rotational speed to at least one thousand hertz.

The Centrigual Pumps in the program will have vibration measurements taken in a plane approximately perpendicular to the rotating shaf t in two orthogonal directions on each accessible Inuq? bearing housing and in the axial direction on each accessible pump thrust bearing housing.

7 JUSTIFICATION:

Measurements of vibration in mils displacement are not sensitive'to small changes that are indicative of developing mechanical problems.

Therefore, the proposed alternate method of measuring vibration amplitude in inches /second (in conjunction with the use of the allowable vibration ranges and limits as established in ANSI /ASME.OM/b-1989, Part 6) provides added assurance of the continued operability of the pumps.

8. ' APPLICABLE TIME PERIOD:

This relief is requested once'per quarter during the first inspection interval.

(9999D/WPF/021794) 3.5 - page 2 of 13

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Rev. 10-

9. APPROVAL STATUS:

a. This relief request is a proposed change to the approved PR-1 and' '

is.NQI approved for use. Formal written approval.from the NRC is >

required prior to changing the vibration monitoring points on the vertical line shaft pumps in the program. . (1/2 RH01PA, 1/2RH01PB, .,

1/2CS01PA, 1/2CS01PB). Expedited review and approval is l requested.

b. Relief granted per SER 1/31/92 provided all of the OM-6 vibration measurement requirements are complied.with. Byron is in full compliance with the excep*4rn of the SX pumps covered under PR-7.

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Rev. 10 RELIEF REQUEST NO, PR-2

1. PUMP NUMBER: All pumps in the program plan. l

2. NUMBER OF ITEMS: 42 pumps. l

3. ASME CODE CLASS: 2&3 l

4. ASME CODE. SECTION XI REOUIREMENTS:

Per IWP-3100, Inservice Test Procedure pump bearing temperatures are required to be measured to dstect any change in the mechanical characteristics of a bearing. IWP- 3 500 (b) requires three successive '

readings taken at ten minute intervals that do not vary more than 3%.

5. BASIS FOR RELIEF:

a. The.CC, CS, DO, RH, SX and WO pumps' (25 total) bearings are not provided with permanent temperature detectors or thermal wells.

Therefore, gathering data on bearing temperature is impractical. <

The only temperature measurements possible'are from the bearing housing. Measurement of housing temperature on these pumps does not provide positive information on bearing condition or degradation. For example, the bearings on the Essential Service Water pumps (OSXO2PA,.0SXO2PB) and Diesel Oil Transfer Pumps-(1DOO1PA thru D and 2DOO1PA thru D) are. cooled by the pumped fluid.

Therefore, any heat generated by degraded bearings is carried away by the cooling fluid and would not be directly measured at the bearing housing, i

b. Even those cases were bearing temperature monitoring equipment is available, bearing temperature measurements will not provide significant additional information regarding bearing condition other than that already obtained by measuring vibration.

Measurement of vibration provides more concise and consistent information with respect to pump and bearing condition. The usage of vibration measurements can provide information as to a change in the balance of rotating parts,' misalignment of bearings,; worn ,

bearing, changes in internal hydraulic forces and general pump .

integrity prior to the condition degrading to the point where the component is jeopardized. Bearing-temperature does not'always predict such problems.

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c. An increase in bearing temperature most often does not occur until ,

the bearing has deteriorated to a point where additional pump ,

damage may occur. Bearing temperatures are also affected by.the temperature of the medium being pumped, thus'the hydraulic and-vibration readings are more consistent. '

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Rev.' 10

6. ALTERNATE TESTING:

Quarterly measurement of hydraulic parameters and vibration readings provide a more positive method of monitoring pump condition and bearing degradation.

7 JUSTIFICATION:

By measuring pump hydraulic parameters and vibration velocity, ~ (as described in PR-1), pump operability and the trending of mechanical degradation is assured. Also, since these parameters (i . e . , hydraulic parameters and vibration) are measured quarterly, the pump mechanical condition will be more accurately determined than would be possible by measuring bearing temperature on a yearly basis.

8. APPLICABLE TIME PERIOD:

This relief is requested once per year, during the first inspection interval.

9. APPROVAL STATUS:

a. This relief is a proposed change to the approved PR-2 and is EQT ~

approved for use. Formal written approval from the NRC is required DI.im to use. Expedited review and approval is requested.

b. Relief granted per SER 1/31/92.

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Rev. 10 i

RELIEF REQUEST NO. FR-3

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Rev. 10 i RELIEF REQUEST NO. PR-5 i

1. PUMP NUMBER: OCC01P, ICC01PA, ICC01PB, 2CC01PA, 2CC01PB, ICV 01PA, 1CV01PB, 2CV01PA, 2 CV01PB , 1DOO1PA, IDOO1PB, 1DOO1PC, 1DOO1PD, 2DOO1PA, 2DOO1PB, 2DOO1PC, 2DOO1PD, OSX02PA,-

OSX02PB, ISXO1PA, ISXO1PB, 2SX01PA, 2SX01PB

2. NUMBER OF ITEMS: 23 pumps.

3. bSME CODE CLASS: 2&3

4. ASME CODE, SECTION XI REOUIREMENTS:

Per IWP-4120, the full scale range of each instrument shall be three l times the reference value of less.

5. BASIS FOR RELIEF:

The full scale range of ultrasonic flowmeters, used to collect Section-XI flow data, exceed three times the reference value.

6. ALTERNATE TESTING:

Ultrasonic flowmeters, with digital readouts and totalizer features will

• be utilized to obtain Section XI flow d-*

7. JUSTIFICATION:

Ultrasonic flowmeters provide an accurate means of measuring flowrate.

They utilize a digital display whose accuracy is independent of the full scale range. The ultrasonic flowmeter is well within the requirements of IWP-4110 and IWP-4120, which refer to an instrument accuracy of 2%

of full scale for an instrument with a range of three times the H reference value er less. The followir.g examples will illustrate - this  !

point. The corponent cooling pumps (OCC01P, 1/2CC01PA, and 1/2CC01PB) have a reference value of approximately 4500 gpm. Using the Code 1 Requirements, an instrument with a full scale range of 13,500 gpm 2l (3 x 4500 gpm), the acceptable instrument accuracy is i 270 gpm

(.02 x 13500 gpm). Using the ultrasonic flowmeter, with an accuracy of ]

4% of the indicated reading, provides an instrument accuracy of i 180  ;

gpm. (.04 x 4500 gpm).

The diesel oil transfer pumps (IDOO1PA-PD and 2DOO1PA-PD) have a reference value of approximately 25 gpm. Using the Code Requirements, an instrument with a full scale of 75 gpm (3 x 25 gpm) the acceptable instrument accuracy is 1. 5 gpm ( . 02 x 75 gpm) . Using the ultrasonic flowmeter with an accuracy of 4% of indicated reading will provide an instrument accuracy of i 1.0 gpm (.04 x 25 gpm).

Use of an ultrasonic flowmeter, with totalizer and integrator feature, instead of other instruments allowed by IWP 4110 and IWP-4120, will provide more precise and accurate flow measurements. j (9999D/WPF/021794) . 3.5 - page 8 of 13 i

.Rev. 10' t

t i

8. APPLICABLE TIME PERIOD:

This relief is requested once per quarter, during the first inspection' interval.

s

9. APPROVAL STATUS: ,

a. Relief granter per SER 09/15/88.

b. Relief granted per NRC Generic Letter 89-04. ,

c. Relief granted per SER 09/14/90 t

i 4

t 5

r i

4 (9999D/WPF/021794) _3.5 - page 9 of 13

, ,. ~,, , - . - , . . . . . . ., .- - . . . , _ ,

Rev, 10 RELIEF REQUEST NO. PR-6

1. PUMP NUMBER: 1DOO1PA, 1DOO1PB, IDOOIPC, 1DOO1PD 2DOO1PA, 2SOO1PB, 2DOO1PC, 2DOO1PD

2. NUMBER OF ITEMS: 8 pumps.

3. ASME COD CLASS.1 3

4. ASME CODE. SECTION XI REOUIREMENTS:

Per IWP-3100, differential pressure shall be measured on all pumps that are tested.

5. BASIS FOR RELIEF:

These pumps are positive displacement Diesel Oil Transfer Pumps. The ,

pump differential pressure is not a factor affecting pump performance, but rather dependent only on the-inlet pressure to the pump. As the pump discharge pressure is constant, and the inlet pressure varies with tank level, the differential pressure is not a valid operatianal parameter.

6. ALTERNATE TESTING:

Pump discharge pressure for positive displacement pumps is a valid operational parameter. This will be used to evaluate the Diesel Oil Transfer Pumps performance.

7. JUSTIFICATIOlli Using pump discharge pressure in lieu of pump differential pressure will provide meaningful pump performance data for evaluation of operational Aeadiness of the Diesel Oil Transfer Pumps.

8. APPLIGABLE TIME PERIOD:

This relief is requested once per quarter during the first inspection inte rval .

9. APPROVAL STATUS:

a. Relief granted per SER 09/15/88.

b. Relief-granted per NRC Generic Letter 89-04.

c. Relief granted per=SER 09/14/90.

(9999D/WPF/021794 ) - 3.5 - page 10 of 13

Rev. 10 RELIEF REQUEST NO. PR-7

1. U E.MP NUMBER: OSX02PA, B pumps.

2. NUMBER OF ITEMS: 2 pumps.

3. ASME CODE CI. ASS : 2&3

4. ASME CODE, SECTION XI_REOUIREME?TTS:

ANSI /ASME OMb-1989, Part 6 states: "If deviations fall within the alert range of Table 3, the frequency of testing specified in paragraph 5.1 shall be doubled until the cause of the deviation is determined and'the condition corrected. If deviations fall within the required action range of Table 3, the pump shall be declared. inoperable unit the cause of the deviation has been determined and the condition corrected.

When a test shows deviations outside the acceptable range of Table 3, the instruments involved may be recalibrated and the test rerun."

TABLE 3 PUMP PUMP TEST ACCEFTABLE ALERT REQUIRED TYPE SPEED PARAMETER RANGE RANGE ACTION RANGE Centritugal and > 2.5 Vrto 6V r >6V r vertical line < 600 rpm Vd'YV 12.5 V r ' "'

shaft (Note 2) > 10.5 mils > 22 miss Centritugal and > 2.5 Vrto 6V r >6V I vertical line >

,,600 rpm V yor V d 12.5 V r "' "'

shafl (Note 2) > 0.325 in/sec > 0.70 in/sec Reciprocating Vd "' Y v i 2.5 V 7 > 2.5 V7 to 6V r >6V r

5. BASIS FOR RELIEF:

The Essential Service Water Pumps OSX02PA & B are of a very unique design (see Fig. 1). The pump is attached to a horizontal diesel driver via a right angle gear drive, and the gear drive is located approximately 39 feet above the pump. This configuration assures pump.

operability during the design basis flooding of the Rock River. As would be expected, this extreme configuration results in vibration characteristics which are different from pumps of a more conventional design. The vibration levels for these pumps are consistently higher than the commonly expected values. These. pumps exhibited higher than usual vibration levels at the time of their installation (approximately 0.4 - 0.45 in/see for the gear box and approximately 0.20 - 0.25 in/sec for the pump), at which time they were verified by the vendor to be operating properly, and have continued to display high vibration levels throughout their service life.

(9999D/WPF/021794) 3.5 - page 11 of 13 i

. . - - ~, . . ~ . - - .-

Rev. 10 6, ALTERNATE TESTING:

Also characteristic of these pumps is the fact that the gear box vibration levels are consistently higher than the pump vibration levels.

We propose that, in order to properly monitor this uniquely designed pump, separate acceptance ranges be used for the gear box and the pump, The vibration levels for the pump, though consistently higher than those for conventional pumps, display no significant upward trend over a period of approximately six years. This is significant evidence that these vibration levels are characteristic of this unique. design and do not indicate pump degradation. However, we. propose that tighter acceptance criteria be used for the pump than for the gear box in order to detect any degradation that may occur in the future. Based on performance data, Byron Station proposes that the following ranges be utilized to monitor vibration levels for OSX02PA & B (where V = the vibration amplitude (in inches per second) and Vr = the reference vibration amplitude (in inches per second} established when the pump was known to be operating acceptably) a OSX0?PA & B Acceptance Alert Required Action Location Range Range Range (in/sec) (in/sec) (in/sec) (in/sec)

Vs2.5Vr 2.5Vr<Vs6.0Vr V26.0Vr l

Pump Shaft and or or l

Vs0.325 0.325<Vs0.700 V>0.700 Vs2.5Vr 2.5Vr<Vs6.0VR V>6.0Vr Gearbox and or or Vs0.560 0.560<Vs0.900 V>0.900 Additionally, although it is obvious that this pump has unusual y characteristics and understandably high vibration levels,-we plan to I maintain conservatism in our maintenance practices and replace the gear assembly when parts are available to re-verify that the high vibration levels are characteristic of.this pump design. l

-1 7 JUSTIFICATION: l A review of past perfonnance parameters for the SX Make-Up pumps has been completed. Attached are graphs of flowrate and vibration data over 1 the last 2.5 years of operation. Prior to 1989, only the maximum peak- i vibration values were recorded without ~ 1ndication of orientation. Since 1989, all the individual peak vibration values at each location were recorded with associated orientation, therefore, the prior. data cannot be directly compared to recent data. From the attached plots (see attachments A and B) and tables (see table 1 and 2) it can be seen that the vibration fluctuates dramatically but showed no overall upward trend over a 2.5 year period.

(9999D/WPF/021794). 3.5 - page 12 of 13

, . . . - . . - - ~ . .. .- .. - - - - . --

Rev. 10

7. JUSTIFICATION: (cont.)  !

Also,- Commonwealth Edison System Material Analysis Department (SMAD) measured vibration levels at the point shown in figure 2 and compared the results to available data on vibration amplitudes for similar gear drive arrangements throughout the company. These were diesel driven fire pump units at Braidwood, Zion, and Dresden stations. Regardless of vendor, these four units all exhibited high vibration amplitudes on the gear drive consistent with the elevated vibration levels recorded on the SX Make-Up pumps at Byron Station (see figure 3).

The OM-6 limit on the alert range for vibration is either 2.5. times the reference value or 0.325 (whichever is less) and the code limit on the, required action range is 6.0 times the reference value or 0.700 (whichever is less) . Based on vendor evaluation (see Attachment C) an alert value of 0.560 was selected and based on engineering judgement, a required action value of 0.900 was selected. These are conservative limits in comparison to the OM-6 limits. OM-6 limits allow an increase of 140% between the alert limit and the required action limit ~(for 2.5 times reference to 6.0 times reference) or an increase of 115% (for the '

O.325 to 0.700). The. alert limit being proposed here is 0.560 and the required action limit is 0.900, These proposed limits allow only 61%

increase from alert to required action. This is a much more conservative increase than the OM-6 requirement.

By using acceptance ranges which are reflective of the intrinsic characteristics of the pump, performance can be monitored more ,

effectively and unnecessary and excessive testing of properly  !

functioning equipment can be avoided, l

8. APPLICABkE TIME PERIOD:

This relief is requested quarterly, during each inservice pump test, during the first inspection interval.

9. APPROVAL STATUS:

a. November '90: SX Make-Up Pump vibration limit relief request moved from RELIEF REQUEST NO. PR-1 to RELIEF REQUEST NO. PR-7 for clarification.

b. March '91: Additional information plus separate Ptump Shaf t and -

Gearbox limits proposed based on'NRC request for additional information.

c. August '91: Additional information on operating history and-elevated vibration levels on similar pumps added baseo on NRC request for additional information. Relief pending per Approval from the NRC is required PRIOR to use of this relief request.

Expedited review knd approval is requested.

1

d. January '93: . Vendor recommendation. incorporated.

(9999D/WPF/021794) 3.5 -

page 13'of 13

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825-800 -

'7 5 -

750 -

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01/St/U ATTA M A page 3 of 10 OSd M

ly0B gy0B OSX02PA l PUMP UNE SHAFT VIBRATION (RAD E-W)(IN/SEC)

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, TESTDATE I

g/st/'t ariw , a.-

page 4 of 10-OM M

TOB gy0B OSX02PA UPPER GEAR BOX VIBRATION (VERT) (IN/SEC) 3 VUGBV

_900.:.....................................................................................

E75 4 E50i 825 1 800- .

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700 j 6751-

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TESTDATE I 1

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30? ggoM l OSX02PA ,

UPPER GEAR BOX VIBRAn0N(RAD N-S) (IN/SEC) l VUG 8RN 9ep.:..................................................................................

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70B gy0B OSX02PA UPPER GEAR DOX VIBRATION (RAD E-W) (IN/SEC)

VUGBRE

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l

01/U! ATTAC3DGMT A Page 7 of 1o

$0Bgy0N OSX02PA i LOWER GEAR BOX VWRATION(VERT) (IN/SEC)

VLGBV 9006------------------------------~~--------------------------~~~----~~----------------

8751 8502 8251 800d 775-750 -

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1 1

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1 TESTDATE l j

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" OSY y0Bgos#

OSX02PA LOWER GEAR BOX VIBRATION (RAD N-S) (IN/SEC)

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f g/st/S' amemourr x l Page 9 of 10 i o@i i M

y0B gyoB .

1 OSX02PA '

LOWER GEAR BOX VIBRATION (RAD E-W)(IN/SEC)

VLGBE 900 ' - - - - - - ~ ~ - - - - ~ ~ - - - - - - - - - - - - - - ~ ~ - - - - - - ~ ~ - - - - ~ ~ ~ ~ - ~ ~ ~ - - - - - - ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ - - '

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, , , 1 12/05/57 04/18/89 08/31/90 01/13/92 TESTDATE

01/31! ATTANMnT A Page to of ic g909 OY TOB OSX02PA FLOW RATE (GPM)

PLRAT ISOC J l

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1 l1650-l i

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, TEST 0 ATE

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gg $70B OSX02PB PUMP LINE SHAFT VIBRATION (RAD N-S) (IN/SEC)

VPLSHN 9004 4 E75, 4

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. TESTDATE I

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70% geoF .

0SX02PB PUMP LINE SHAFT VIBRATION (RAD E-W) '(IN/SEC) '

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p/C1/O 1TTACMEErr B pago 4 of 10:

OM gos uaoS OSX02PB UPPER GEAR BOX VIBRATION (VERT) (IN/SEC) vucev

.900+------------------------------------------~~~---------------------------------------

875 4t

.850 -

825 $

.800 4 775J 750 -l i

< Y \

125 j \'

700g

.6758 f'

. 650J '

625-1f \

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550- -

525 - \i

.500-475 -

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300 -i 275] ..

25C 4 i 1

225- 1 200 ,

! 175]

l 150 d I 125d l 100J

' 075d 050 -l )

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I FLOW RATE (GPM)

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6

r.

ATTACIDENT C STEWART & STEVENSON SERVICES, INC.

P.O E0X 1437 HOUS ON TEXAS 7??$1.e.17. Ot31923-2'81 ADWNtSTRATION 8J0 FAX 1713: 02}4960 . F8J40HAst NG Cept Fu '713; 9211136 TELEX D64391. TWI 9'0-2SO43ab 1-21-93 TRANSMISSION DATE RECIPROCATING ENGIKE DIVISION We are transmitting 1 pages (including cover letter). If transmission is incomplete, please call (713) 923-0317.

Please deliver to: Page _.l_. of _.l._

NAME Warren Wacner FROM Jin Bell FIRM Comonwealth c'dison PHONE NO f7131 923-0337 FAX No f815) 234-5441 X2270 FAX NO '7131 923-4917

REFERENCE:

BV71N Pump Unit W.O. N74410

Dear Mr. Wagner,

As per our telephone conversation Stewart & Stevenson's mininum  ;

standard for vibration peak to peak is 6 mils displacement at 1800 RPM horizontal and vertical. This corresponds to .56 inches per second velocity peak.

The existing .55 inches per second velocity peak corresponds to 5.8 mils displacement peak to peak which is within tolerance.

If you have any further questions, please get back with me.

Very truly yours, es eI cc: Robert Mitcham JB021.03 - 12340307M ENG'NEEMED POWER FOR THF MAftn.E. AVIATION POWER GENERATION. CECENSE ANC PETo.O(f uM thouSTRtES

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