ML050630397
| ML050630397 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 02/24/2005 |
| From: | Bethay S Entergy Nuclear Operations |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 2.05.012, TAC MB8779 | |
| Download: ML050630397 (47) | |
Text
t
' ~
EF ntear yg Entergy Nuclear Operations, Inc.
Pilgnim Station 600 Rocky Hill Road Plymouth, MA 02360 Stephen J. Bethay Director, Nuclear Assessment February 24, 2005 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555-0001
SUBJECT:
Entergy Nuclear Operations, Inc.
Pilgrim Nuclear Power Station Docket No. 50-293 License No. DPR-35 Pilgrim Fourth Ten-Year In-service Testing (IST) Program, IST Relief Request PR-03 (TAC NO. MB8779)
LETTER NUMBER: 2.05.012
REFERENCES:
- 1. Entergy Letter No. 2.02.109, Pilgrim Fourth Ten-Year In-service Testing (IST) Program and Request for Approval of IST Relief Requests, dated December 6, 2002.
- 2. Entergy Letter No. 2.04.01 0, Pilgrim Fourth Ten-Year In-service Testing (IST) Program, Response to NRC Request for Additional Information on Pilgrim Relief Request PR-03, dated February 10, 2004.
- 3. Entergy Letter No. 2.04.046, Pilgrim Fourth Ten-Year In-service Testing (IST) Program, IST Relief Requests: PR-03 (TAC NO.
MB8779), VR-03 (MB8777), VR-04 (MB8778), and VR-06 (MB8780),
dated June 4, 2004.
Dear Sir or Madam:
By this letter Entergy submits the revised HPCI Pump Relief Request PR-03, Revision 2 (Attachment 1), within the scope of the fourth Ten-Year interval IST program (Reference 1) for NRC approval. The PR-03 Rev. 2 includes updated information previously discussed with the NRC Staff at the December 8, 2004 meeting in response to draft NRC questions, dated June 17, 2004 (Attachment 3).
The scope of this relief applies to ASME OMa-1996, ISTB 5.2.3, Comprehensive Test for HPCI pumps.
Pursuant to 10 CFR 50.55a(a)(3)(i), Entergy proposes to use alternative testing to comply with ISTB 5.2.3. The proposed alternative provides an acceptable level of quality and safety because the alternative testing verifies the operational readiness of the HPCI pump.
205012
Entergy Nuclear Operations, Inc. Letter Number: 2.05.012 Pilgrim Nuclear Power Station Page 2 Pilgrim intends to perform comprehensive HPCI surveillance test during the next quarterly HPCI System Work Week (Maintenance/Test) Window that is greater than 30 days away, following receipt of an approved relief request.
The commitments contained in this letter are included in Attachment 2.
If you have any questions or require additional information, please contact Mr. Bryan Ford, Licensing Manager, at (508) 830-8403.
Sincerely, Stephen J. B thay : HPCI Pump Relief Request, PR-03, Revision 2, (6 pages) : Summary of Commitments (1 page) : Response to NRC Draft Request for Additional Information (3 pages) : HPCI Pump Configuration and Historical and Current Vibration Data (32 pages) cc: Mr. John P. Boska, Project Manager Office of Nuclear Reactor Regulation Mail Stop: 0-8B-1 U.S. Nuclear Regulatory Commission 1 White Flint North 11555 Rockville Pike Rockville, MD 20852 U.S. Nuclear Regulatory Commission Region 1 475 Allendale Road King of Prussia, PA 19406 Senior Resident Inspector Pilgrim Nuclear Power Station 205012
ATTACHMENT 1 HPCI PumD Relief Request. PR-03, Revision 2. (6 paaes)
PUMP RELIEF REQUEST PR-03. Revision 2 PUMP: P-205 (Main/Booster)
SYSTEM: High Pressure Coolant Injection (HPCI)
CLASS: 2 FUNCTION: Provides emergency core cooling subsequent to a small break LOCA.
TEST REQUIREMENTS:
ASME OM Code OMa-1996, ISTB 5.2.3, Comprehensive Test ISTB 5.2.3(d), Vibration (displacement or velocity) shall be determined and compared with corresponding reference values. Vibration measurements are to be broad band (unfiltered). If velocity measurements are used, they shall be peak. If displacement amplitudes are used, they shall be peak-to-peak.
ISTB 5.2.3(e), All deviations from the reference values shall be compared with the ranges of Tables ISTB 5.2.1-1 and ISTB 5.2.3-1 and corrective action taken as specified in paragraph ISTB 6.2. The vibration measurements shall be compared to the relative and absolute criteria shown in the Alert and Required Action Ranges of Table ISTB 5.2.1-1. For example, if vibration exceeds either 6 V, or 0.7 in./sec, the pump is in the Required Action Range.
RELIEF REQUESTED:
PNPS requests relief from the ASME OMa-1996, ISTB 5.2.3(d) required method of determining the vibration velocity (Vv) overall value for surveillance test use and for establishing reference values for the HPCI Main Pump inboard (turbine side) bearing horizontal point (P3H) and the Main Pump outboard (gearbox side) bearing horizontal point (P4H). PNPS proposes that vibration occurring at the discrete frequency component that is at exactly 4x Booster Pump RPM be disregarded, and not be included as part of the vibration spectrum vector summing process to obtain the main pump overall value for these points during Comprehensive pump testing.
This method is equivalent to filtering out the discrete frequency component that is at exactly 4x Booster Pump RPM from the broad band vibration spectrum. Since ISTB 5.2.3(d) requires unfiltered vibration measurements, relief is requested to deviate from the Code requirement.
BASIS FOR RELIEF:
Relief from the referenced Code requirements is based on the determination that the proposed alternative testing will provide an acceptable level of quality and safety in accordance with 10CFR50.55a(a)(3)(i).
Historic testing and analysis performed on the HPCI System by PNPS (and the pump manufacturer) have consistently revealed characteristic pump vibration levels that exceed the acceptance criteria stated in Table ISTB 5.2.1-1. High vibration appears on the Main Pump bearing housings at approximately 2x RPM in the horizontal direction, which is caused by Booster Pump excitation (at 4x RPM of the booster pump). Under normal circumstances at 4000 rpm, the vibration amplitude at the Main Pump bearings in the horizontal direction exceeds the OM Code absolute vibration Required Action Range of > 0.7 in./sec. Also, under the same conditions, all of the remaining HPCI Main and Booster Pump vibration monitoring points, except for one, typically exceed the OM Code absolute acceptable range upper value of 0.325 in./sec.
1
The vibration characteristics of the HPCI Pump are predominantly a function of the pump design and should be identified as such rather than attributed to pump degradation. The high vibration has been present to the same order of magnitude since the pump was new. Although existing vibration levels of the HPCI pump are higher than the acceptance criteria provided in Table ISTB 5.2.1-1, they reflect the unique operating characteristics of the HPCI pump design configuration. There are no major vibrational concerns that would result in pump degradation or would prevent the HPCI pump from performing its design safety function for an extended period of operation.
The purpose of the Code required testing is to demonstrate operational readiness of the HPCI pump by monitoring pump vibrations for degradation and taking corrective actions when the vibration levels exceed the Code specified values. The Code specifies in ISTB 4.3(g) footnote that the reference vibration measurements should be representative of the pump and that the measured vibration will not prevent the pump from fulfilling its function. Accordingly, Pilgrim is proposing an alternative testing to demonstrate the operational readiness by taking into consideration the vibration measurements representative of the as-built configuration of the HPCI pump.
Proposed Alternate Testing to the ASME OMa-1 996 Code:
Pilgrim proposes alternative testing as follows.
- 1. The alternative testing proposes to remove the 4x Booster Pump RPM frequency component (discrete peak) from the vibration spectrum of the Main Pump since its amplitude is not related to the physical condition or rotating dynamics of the Main Pump rotor or bearing system. The Main Pump vibration spectrum, with this single 4x Booster Pump RPM frequency component removed, has been shown to be stable and more useful for monitoring actual pump condition. When this vibration frequency component at 4x Booster Pump RPM is subtracted from the Main Pump vibration spectrum the remaining vibration, which is attributed to the Main Pump, is below the OM Code Required Action Range. This corrected vibration level provides a more representative measurement of the pump condition to be used for trending.
- 2. All other discrete vibration peaks observed at the main pump horizontal vibration points will be evaluated during each Comprehensive test, and will have an Acceptable Range upper limit of 1.05 Vr and an Alert Range upper limit 1.3 V. These reviews of the frequency spectrum data ensure that any significant change in the vibration signature will be noted regardless of whether the severity causes the overall level to exceed its criteria. For example, if the overall vibration level is acceptable but the 1x RPM component has increased to greater than 1.3 times the reference value overall level (Vr),
then the pump will be placed in the vibration Required Action Range (>0.7in./sec).
Pilgrim will increase the ASME OMa-1996, ISTB 5.2.3 required frequency for vibration monitoring (that is part of the comprehensive testing) from once/2 years to once/year.
The Code required comprehensive test for flow rates would continue to be once/2 years.
Given that the vibration will normally be within the Alert Range (>0.325 in./sec), the once/year frequency will typically be doubled to twice/year. The normal practice will be to monitor vibration in the same manner during each of the Quarterly Group B Hydraulic Tests. Thus, vibration monitoring will be performed up to 8 times in 2 years as part of Group B Hydraulic Tests, instead of once/2 years as part of the comprehensive test.
- 3. Pilgrim will continue current HPCI pump and turbine monitoring and maintenance activities, with changes as conditions warrant, as follows:
2
- Quarterly pump and valve operability tests will be performed to ensure the HPCI pump and turbine function for the intended safety function.
. Quarterly lubrication oil sampling and laboratory analysis for the pressure-fed bearings on the Turbine, Main Pump, and Gear Reducer and once/cycle (2 years) for the non-pressure fed Booster Pump will be performed. Lubrication oil analysis currently performed includes viscosity, acidity, residue, water content, metals by A.E.
spectrometry, and ferrogram readings. This type of monitoring will detect degradation of the turbine or pump bearings due to accelerated wear, fretting, surface fatigue, or oil contamination.
- HPCI pump and turbine lube oil system is serviced as-needed weekly. HPCI gland seal condenser hot well pump and motor bearings and HPCI auxiliary lube oil pump and motor bearings are serviced semiannually for lubrication.
- HPCI Turbine/Main Pump, Main Pump/Reducer, and Reducer/Booster Pump gear-type shaft couplings are cleaned, examined, and grease-lubricated every 2 years.
These examinations will detect excessive wear, fretting, heating, or fatigue due to any unusual loading conditions.
The past 3r IST interval and all previous monitoring and maintenance activities have shown no evidence or observations of degradation in the HPCI Turbine, Main Pump, Gear Reducer, or Booster Pump based on the attached HPCI and Booster Pump historical vibration spectrum (Attachment 4). Thus, the continuation of the above periodic monitoring and maintenance activities will ensure that the HPCI pump remains in a high level of operational readiness and that any degradation of HPCI pump mechanical condition, reliability, or performance will be detected and corrected in a timely manner.
Technical Justification:
PNPS has conducted an evaluation of the HPCI pump vibration characteristics (Reference 1).
An important conclusion of the PNPS evaluation is that the mechanical condition of the Main Pump can be monitored satisfactorily by disregarding the single frequency component caused by the excitation at 4x Booster Pump RPM. The four-vane impeller of the Booster Pump generates the excitation force hydraulically. This small pressure pulsation force exists at the vane passing frequency (number of vanes times RPM) for all centrifugal pumps and is usually seen as a significant but not particularly troublesome component on the frequency spectrum for vibration measurements taken at the bearing housings. For the HPCI Pump, this vane passing frequency is a problem because it coincides with a hydraulic standing wave resonance in the cross-over piping from the Booster Pump to the Main Pump when the machine is operating at the rated speed of 4000 RPM. There is an acoustic pressure standing wave pattern, at the 4x RPM frequency, whose wavelength in water is equal to an even fraction (1/4 or 1/2) of the dimensional length inside the cross-over pipe. This is the same principle on which an organ pipe generates a pure tone pneumatic pressure standing wave.
The Main Pump pedestal has a horizontal structural rocking mode of the pump pedestal at the same frequency when the main pump is operating at the rated speed of 4000 RPM. The vibration mode is the second fundamental rocking mode, which is a torsional or twisting mode where the two end bearings move 180 degrees out of phase horizontally. The result of these coincident acoustic and structural resonances is that the Main Pump exhibits high vibration in the horizontal direction at the 4x Booster Pump RPM frequency. This is solely due to the excitation from the Booster Pump being amplified by the coincident resonances. This level of 3
vibration at 4x Booster Pump RPM would be seen on the Main Pump bearing housings even if the Main Pump was not actually running (which is not possible as both pumps are on the same drive train).
The resonant vibration condition at the 4000 RPM operating speed is not detrimental and will not prevent the HPCI Pump from fulfilling its function. At the 134 Hz frequency of the resonant vibration on the Main Pump, caused by the excitation at 4x Booster Pump RPM, the actual displacement amplitude at 0.7 in/sec peak velocity amplitude is 0.0017 inches peak-to-peak.
This displacement imposes negligible alternating stresses on the pump pedestal, housings, and connected piping. The peak-to-peak displacement is also less than the Main Pump fluid film journal bearing clearances and would impose negligible loading to these bearings.
The purpose of the ASME OM Code for pump testing is to monitor pumps for degradation. The concept of vibration monitoring is to establish baseline values for vibration when the pump is known to be in good working condition, such as after a maintenance overhaul. From that reference point, trending is performed to monitor for degradation based on the ratio of subsequent vibration levels relative to the reference values. The OM Code also establishes absolute vibration level criteria for Alert (>0.325 in/sec) and Required Action (>0.7 in/sec). In doing so, it was recognized that absolute vibration level limits (as opposed to relative change or ratio limits) are not always quantitatively linked directly with pump physical condition and the following remarks are stated in the ASME OMa Code 1996:
"Vibration measurements of pumps may be foundation, driver, and piping dependent.
Therefore, if initial vibration readings are high and have no obvious relationship to the pump, then vibration measurements should be taken at the driver, at the foundation, and on the piping and analyzed to ensure that the reference vibration measurements are representative of the pump and that the measured vibration levels will not prevent the pump from fulfilling its function. "
An important conclusion of the PNPS HPCI vibration evaluation is that the mechanical condition of the Main Pump can be monitored satisfactorily by disregarding the single frequency component caused by the excitation at 4x Booster Pump RPM. A single peak frequency component can be effectively deleted from a vibration spectrum using the mean-squared subtraction method, that is, the discrete component amplitude (in/sec peak) is squared and subtracted from the spectrum overall level squared, then the square root of that difference represents the overall vibration level that exists without the energy contributed by the deleted component. It has been found that when this method is used, the remaining vibration overall level is much more consistent, stable, and trendable.
This method of vibration level correction was applied to historical spectrums. The 4x booster pump RPM component was taken out of the calculation for the main pump overall vibration level. This data shows that when the 4x booster pump RPM component is deleted from the main pump vibration, the level is below the Required Action Range (> 0.7 in./sec) but still within the Alert Range (> 0.325 in./sec). It was also shown that the potential effects from the dynamic alignment of pump shaft couplings (at 2X Main Pump RPM) can still be monitored effectively.
Impact of Potential Modifications:
For the HPCI Main and Booster Pumps, it has been determined that the vibration is indeed foundation and piping dependent. To reduce the HPCI Main and Booster Pump vibration down to levels that meet acceptable OM Code vibration criteria requires modifications to the HPCI Pump, mounting components, foundation and/or cross-over (interconnecting) piping.
As suggested in a Byron Jackson Tech Note (Reference 2), this vibration may be improved by modifying the interconnecting piping and the Main Pump mounting pedestal. The alternative 4
modification changes the Booster Pump impeller from four to five vanes to alter the forcing function of the standing wave resonance.
The proposed Byron Jackson modifications, other than replacing the Booster Pump impeller, are generally very difficult to implement successfully. Altering the natural frequency of a large pump installation requires either considerable additions of stiffening components or substantial additions of mass. Often the results of such design changes are unsuccessful or unfavorable due to the variable speed operation requirements.
Modification of the HPCI Booster would require replacing the current four-vane impeller with an upgraded five-vane impeller. The impeller modification, although yielding predictable results, requires extensive work to the HPCI Pump at a time when such a major rebuild of this pump is not otherwise necessary or desired. The expected result would be a modest decrease in the vibration caused on the Main Pump at 4000 RPM, although the vibration would remain above the 0.325 inch/sec Alert Range criteria. A small decrease in hydraulic performance is also expected when changing from a four to five vane impeller. The proposed major modification would cost approximately $500,000 without compensating decrease in the pump vibration to bring it from the Action Required Range to the Acceptable Range. Accordingly, the proposed modification would not serve the underlying objective of the Code required testing for monitoring degradation in pump operational readiness.
PNPS has also concluded that none of the possible modifications that could be performed on the HPCI pump, mounting pedestal, or cross-over piping are necessary. This is primarily due to the nature of the HPCI Pump service profile. The Byron Jackson Tech Note describes the following consideration in the Technical Discussion:
"Pumping systems in which the vane passing pressure pulsations form standing waves in the attached piping are not unusual, especially if the pumps have a variable speed driver.
Standing waves are highly dependent upon water temperature. Thus, measured vibration amplitudes often vary from test to test.
The HPCI Pump service is such that the pump runs for short periods of time at highly variable speeds. The pump inservice testing at PNPS is performed with the pump operating at or close to its rated speed (4000 RPM) and flow conditions (4250 GPM) that are unique to PNPS. For this particular pump configuration, this pump speed corresponds to the point where the acoustic resonant vibration is typically most pronounced. In actual service for high pressure coolant injection to the reactor, the pump will operate at the speed that the flow controller requires to maintain reactor water level. The flow rate of 4250 GPM is the maximum makeup flow rate for which the HPCI system was intended to be capable of maintaining reactor water level. This flow rate is far in excess of the decay heat makeup water requirements for the reactor in the isolated condition in the absence of a major leak. The pump speed required is also dependent on reactor pressure with the required speed decreasing along with reactor pressure.
The same general HPCI Pump configuration is used at other plants but often with different rated speeds and flows such that the vibration characteristics at the inservice testing point are markedly different for that reason. The vibration monitoring performed (including a frequency spectral review) to date under the IST program and the PNPS pump vibration monitoring program has shown that there has not been degradation of these HPCI Pump components.
Inservice Testing can be successfully performed for the PNPS HPCI Pump using the methods proposed in this relief request, along with monitoring and maintenance activities currently in practice. Any significant degradation of the HPCI Pump components will be readily identified using the vibration spectral analysis methods and monitoring activities described in the relief request. Therefore, Entergy believes that the proposed alternative testing and monitoring for 5
the PNPS HPCI Pump will provide an acceptable level of quality and safety in accordance with 10 CFR 50.55a(a)(3)(i). l ALTERNATE TESTING: l To allow for practicable monitoring of vibration levels on the HPCI pump, alternate vibration acceptance criteria are necessary. A full spectrum review wiil be performed for all [ST vibration points during each proposed comprehensive test, utilizing the following criteria. l The table below provides the acceptance criteria that are applied to the overall vibration level for l the Main Pump. The note explains that for the horizontal Main Pump points, the discrete frequency component at 4x Booster Pump RPM will be removed from the overall value using the mean-squared subtraction.
MAIN PUMP*
Test Vibration Point AcceDtable Ranae Alert Ranae Required Action Parameter Ranae Main Pump* 2.5V, >2.5Vr to6V, >6V, Horizontal but not or or Inboard & Outboard > 0.325 in./sec > 0.325 to 0.70 > 0.70 in./sec I (P3H & P4H) in./sec Vv Main Pump <2.5V, >2.5V, to6V, >6V, I Vertical but not or or Inboard & Outboard > 0.325 inisec > 0.325 to 0.70 > 0.70 in./sec (P3V & P4V) in./sec Axial Inboard (P3A)
- Note For Main Pump Horizontal vibration points P3H and P4H, a frequency spectrum analysis I will be performed for each comprehensive pump test and the discrete peak at 4x booster pump RPM will be removed (using mean-squared subtraction method) from the vibration spectrum overall value. In addition, all other vibration spectrum discrete peaks will be evaluated during each test, and will have an Acceptable Range upper limit of 1.05 V, and an Alert Range upper limit 1.3 Vr.
DURATION OF PROPOSED ALTERNATIVE The proposed alternative testing shall apply for the remainder of the 4 Inservice Testing Interval at Pilgrim.
REFERENCES (1) PNPS vibration evaluation (ERM 90-445 Rev. 2 "HPCI Pump Vibration Concerns" dated 06/17/1994) [Provided by Entergy letter 2.04.010, dated February 10, 2004].
(2) Byron Jackson Technical Service Bulletin (Tech Note) 9112-80-018 NHPCI Pump Vibration" 6
ATTACHMENT 2 Summary of Commitments Commitment ID Description Due Date
- 1. Entergy will perform comprehensive HPCI pump Next quarterly HPCI testing in accordance with this relief request. System Work Week (Maintenance/Test)
Window that is greater than 30 days away, following receipt of NRC approved PR-03, Rev. 2
ATTACHMENT 3 (3 pages)
Pilgrim Response to NRC Draft Request for Additional Information
RESPONSE TO NRC DRAFT REQUEST FOR ADDITIONAL INFORMATION RELATED TO IN-SERVICE TESTING PROGRAM RELIEF REQUEST PR-03 By letter dated December 6, 2002, supplemented by letters dated February 10, and June 2, 2004, Entergy Nuclear Operations, Inc. (the licensee) submitted an in-service testing program relief request for PR-03, Revision 1 for Pilgrim Nuclear Power Station. The proposed relief request would allow alternate testing to verify operational readiness of the high-pressure coolant injection (HPCI) pump.
The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed the information the licensee provided in Attachment 1 to the letter dated June 2, 2004, and requests the following additional information to clarify the submittal:
NRC Question:
- 1. Under BASIS FOR RELIEF, Introduction / Summary, last paragraph, the licensee states that "it has been concluded that there are no major vibrational concerns that would result in pump degradation or would prevent the HPCI pump from performing its design safety function for an extended period of operation.
The licensee is to:
(a) Provide the collected data to support this statement.
(b) State the actual extended period of operation by which the pump is expected to performed its designed safety function.
(c) Provide input from the pump supplier stating these vibrations are acceptable for the required pump operation.
Pilgrim Response:
Note - A comprehensive response and discussion of these NRC questions on the HPCI Pump Relief Request was provided in a meeting conducted at the Office of Nuclear Reactor Regulation on December 8, 2004. A summary of the responses to each of the questions in this RAI is provided below.
(a) Vibration data that spans a ten-year period from May 1994 to November 2004 shows that the HPCI Booster and Main Pump vibration has not changed in any significant manner for either the frequency content or amplitudes with the exception of the discrete frequency component on the Main Pump points P3H and P4H that is at 4x Booster Pump RPM. It is known that this frequency component is caused by the previously described acoustic resonance effect that is-sensitive to pump speed and water temperature and the amplitude varies significantly. The proposed resolution of spectral subtraction removes the effect of this varying amplitude on the overall vibration level, which is otherwise consistent and stable over the same ten-year period.
(b) The design basis mission time for HPCI for the limiting break size is 16 minutes.
For smaller breaks, HPCI may be operated intermittently. The maximum equipment Environmental Qualification profile time is 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.
205012 1
(c) The pump supplier- (Flowserve - formerly Byron Jackson) has informally reviewed the Pilgrim analytical method of spectral subtraction for the Main Pump points P3H and P4H and understands the principle and logic that is employed. The pump supplier is not in a position to provide vibration analysis recommendations beyond those that were included in the original Byron Jackson Technical Service Bulletin (Tech Note) 9112-80-018 HPCI Pump Vibration." That document provided a diagnosis for the observed vibration and acoustic resonance, which had not been previously understood by pump users, and gave recommendations on methods to reduce vibration by various hardware modifications.
NRC Question:
- 2. Under Technical Justification, third paragraph, provide the documentation to support the statement: "This displacement imposes negligible alternating stresses on the pump pedestal, housings, and connected piping.'
Pilgrim Response:
Stress is a direct function of the total displacement and deflected shape of the structural components, i.e., it is the same as for a statically applied displacement of the same magnitude. The dynamic force required to produce the displacement is dependent on the structural resonances and can be quite low when dynamically applied at a resonant frequency, as is the case here in the horizontal direction. As stated in the earlier responses, the displacement corresponding to 0.70 in/sec peak velocity amplitude at the 134 Hz vibration frequency is 0.0017 inches peak-to-peak. This displacement represents the actual total movement of the pump bearing housing. It can be assumed that there is negligible displacement of the massive pump bedplate such that this displacement at the bearing deflects the pedestal horizontally, which is the most flexible direction, resulting in a small amount of bending in the pedestal and in the connecting piping. This very small amount of deflection imposes negligible bending stress on the pump pedestal, housings, and connected piping. Conversely, the vibration amplitudes in the vertical direction (points P3V and P4V) are much lower because the pedestal is much stiffer in the vertical direction and the resonance effect is only in the horizontal direction, i.e., it is a horizontal rocking mode at 134 Hz, such that the same dynamic force produces very little vertical displacement of the bearing housings.
NRC Question:
- 3. Under Technical Justification, ninth paragraph, provide the documentation to support the statement: "The proposed Byron Jackson modifications, other than replacing the Booster Pump impeller, are generally very difficult to implement successfully."
PNPS Response:
The proposal to Change the length of the interconnecting piping" is based on detuning the acoustical resonant frequency by eliminating the standing wave pattern that forms due to the current pipe dimensions. It would be necessary to raise the frequency at which there is coincidence of the 4x Booster Pump RPM driving force and the standing wave frequency to a value above the normal operating range (4000 RPM). This requires shortening of the cross-over pipe to reduce the wavelength for the standing wave, so that it will not form at 4000 RPM. This modification is not feasible for Pilgrim because the existing cross-over pipe is already at the minimum possible length.
205012 2
The proposal to "Install an acoustic filter in the interconnecting pipe" is not practicable because no such device is known to have been designed for this application. It is also not possible to design such a filter in the flow stream that will not have some impact on the system hydraulic performance.
The proposal to "Alter the mounted structural natural frequency of the injection pump" has been considered but again it is necessary to raise the natural frequency to a value above the normal operating range (4000 RPM), which requires substantial stiffening of the pump pedestal structure. A review of the pedestal and bedplate design shows that the existing structure is extremely massive and there are no accessible locations to add stiffening to the Main Pump mounting structure to raise the natural frequency in the horizontal direction.
NRC Question:
- 4. The licensee is to document the conclusion reached that the expected result for changing from a four-vane to five-vane impeller would provide for only a modest decrease (but still above the Alert criteria) in the vibration being experienced. Additionally, if the information exists, the NRC staff requests that the licensee provide their estimated costs and time associated with changing to a five-vane impeller.
PNPS Response:
The expected results from changing the four-vane impeller to a five-vane design can be very accurately predicted by the spectral subtraction method that removes the effect of the acoustic resonance on the overall vibration amplitude at the Main Pump. The vibration reduction achieved can be no better than the reduction in the overall vibration level obtained by performing the spectral subtraction of the 4x Booster Pump RPM frequency component on the Main Pump points P3H and P4H. When this is performed for typical recent data, the P3H overall level drops from 0.800 In/Sec to 0.445 In/Sec while for P4H the overall level drops from 0.648 In/Sec to 0.489 In/Sec. The remaining vibration is due to the operation of the Main Pump and its own rotordynamics and represents the meaningful vibration that is to be closely monitored and trended to meet the intent of the ASME Code Inservice Testing. The total cost for replacing the Booster Pump rotating element, including all materials and labor, has been estimated at approximately $500,000 and would be performed during an approximately 12 day period within a scheduled plant refueling outage.
205012 3
ATTACHMENT 4 HPCI Pump Configuration and Historical and Current Vibration Data (32 paaes)
- 1. HPCI Pump Configuration
- 2. HPCI Pump Configuration
- 3. HPCI Pump Configuration
- 4. HPCI Pump Vibration Monitoring Program Relief Point P3H Data
- 5. P3H HPCI Vibration Spectrum Data, Nov. 24,2004
- 6. P3H HPCI Vibration Spectrum Data, Aug. 24, 2004
- 7. P3H HPCI Vibration Spectrum Data, Dec. 17,1997
- 8. P3H HPCI Vibration Spectrum Data, May 06,1996
- 9. P3H HPCI Vibration Spectrum Data, Nov. 20,1995
- 10. P3H HPCI Vibration Spectrum Data, May 25,1994 Relief Point P4H Data
- 11. P4H HPCI Vibration Spectrum Data, Nov. 24, 2004
- 12. P4H HPCI Vibration Spectrum Data, Aug. 24, 2004
- 13. P4H HPCI Vibration Spectrum Data, Dec. 17,1997
- 14. P4H HPCI Vibration Spectrum Data, May 06,1996
- 15. P4H HPCI Vibration Spectrum Data, Nov. 20,1995
- 16. P4H HPCI Vibration Spectrum Data, May 25,1994 Point P3V Data
- 17. P3V HPCI Vibration Spectrum Data, Aug. 24, 2004
- 18. P3V HPCI Vibration Spectrum Data, May 25,1994 Point P3A Data
- 19. P3A HPCI Vibration Spectrum Data, Aug. 24, 2004
- 20. P3A HPCI Vibration Spectrum Data, May 25,1994 Point P4V Data
- 21. P4V HPCI Vibration Spectrum Data, Aug. 24,2004
- 22. P4V HPCI Vibration Spectrum Data, May 25,1994 Point P7H Data
- 23. P7H HPCI Vibration Spectrum Data, Aug. 24,2004
- 24. P7H HPCI Vibration Spectrum Data, May 25,1994 Point P7V Data
- 25. P7V HPCI Vibration Spectrum Data, Aug. 24,2004
- 26. P7V HPCI Vibration Spectrum Data, May 25,1994 Point P8H Data
- 27. P8H HPCI Vibration Spectrum Data, Aug. 24,2004
- 28. P8H HPCI Vibration Spectrum Data, May 25,1994 Point P8V Data
- 29. P8V HPCI Vibration Spectrum Data, Aug. 24, 2004
- 30. P8V HPCI Vibration Spectrum Data, May 25,1994 Point P8A Data
- 31. P8A HPCI Vibration Spectrum Data, Aug. 24, 2004
- 32. P8A HPCI Vibration Spectrum Data, May 25,1994
HPCI Pump Configuration GOH P8H W
PAU fUl
-I ago/f D-71 P8VI k3'v I-P/l GOA P7V 030062D3 Main Pump Booster Pump
HPCI Pump Configuration
HPCI Pump Configuration UI
HPCI Pump Vibration Monitoring Program P8H 030062D3 P3H P4H P7H P8H P3V P4V P7V P8V P3A P8A Other points are monitored as part of Vibration Monitoring for Preventive Maintenance and Balance
HPCI Data November 24, 2004 IST - IST, P205 HPCI 042.6k HPCI ISTR -P3H #3 BEARINGOPUMP HORIZONTAL _ . _
1.0 _ - T ,I Roue Spectrum I 24-NOV.04 0044:12 OVRALLu .8003 VOC3 PK * .7¢23 LOAD =4250.0 RPM= 4012.
RPS= 68.87 0.8 0.s . . I 4x BOOSTER
._- PUMP RPM I
I. PNPS Cabulatn to Deleie Discret Peak 0.4 _L.. ..... 0 4xK 90.sw Purnp RPM:
SiMAIN (0o.900) = (OA LevW)*
- (0.665)f (4x BP SPM Peak?
- Subtradt Sq Vahues (0.198t' - 0.445 IrVSoc OA 5x MAN 1K RPM Zx RPM PUMP RPM 02 0 . _
-AL-A - _ .
3 I..
4 S Ordt Freq:
2.017 134.88 0 1 .665 Frequency In Ordt
HPCI Data August 24, 2004 IST - IST, P205 HPCI 042.56k MPCI ISTR *P3H 3 BEARI!NG-PUMP HORIZONTAL 1.0 Rouse Spectrum I 1 24-AUG404 20:46:30 OVRALL= .9415 V-DG PK * .9331 LOAD -4250.0 RPM 3900.
RPS 66833 0.8 0 0. -L......... . ... ' .BOOSTE PUMP RPM 0.
PNPS C culation to Deleft Discrete Peak 0.4 - 0 4z Boosler Punp RPM:
(0.942)' = (OA LeOW)
- (0.822)ta (4IX BP RPM Peak)'
Suact Sq Values Sx MAIN (0.2i2)5 . o.460lnSecOA lx RPM 2x RPM PPUMP RPM 02 -
'I oli L- _ b I. . K 8
Ordr 2.017 I 3 4 S Freq. 133.77 0
Frequency In Oider Spec .822
RX - X203,P205 HPCI TURB & PUMP I X203 HPCI -P3H #3 BEARING-PUMP HORIZONTAL 1.0 ROUTE SPECTRUM 17-DEC-97 16:49:30 OVRALL= 1.42 V-AP 0.8 PK = .6617 0 LOAD =4250.0 0)
RPM= 3997.
RPS = 66.61 C 0.6 0
ci) 0.4 Delete Discrete Peak El- @4x Booster Pump RPM:
(0.662)2 = (OA Level)2 0.2 - (0.519)2 = (4x BP-RPM'Peak) 2 Subtract Sq Values (0.169)0.5 = 0.411 In/Sec OA 0
Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 17-DEC-97 16:49:30 PK = .6854 PK(+) = 1.17 1.0 PK(-) = 1.54 CRESTF= 2.87 C3 0.5 0
0 0
0)
-0.5
-1.0
-1.5
-2.0 Ordr: 2.016 0 40 80 120 160 200 Freq: 134.27 Time in mSecs Spec: .519
RX - X203,P205 HPCI TURB & PUMP X203 HPCI -P3H #3 BEARING-PUMP HORIZONTAL 1.0 -r r ROUTE SPECTRUM 06-MAY-96 09:21:06 OVRALL= .8251 V-DG 0.8 PK = .8208 0 LOAD =4250.0 CD Cn RPM= 4004.
RPS = 66.73 C 0.6
.5 0
0) 0.4 Delete Discrete Peak 0d @ 4x Booster Pump RPM:
- --- A (0.825)2 = (OA Level)2 0.2 - (0.727)2 = (4x BP RPM: Peak) 2
Subtract Sq Values (0.152)0.5 = 0.390 In/Sec OA 0
0 1 2 3 4 5 6 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 06-MAY-96 09:21:06 PK = .9211 PK(+) = 1.30 1.0 PK(-) = 1.51
.) CRESTF= 2.26 0) 0.5
.5 0 0
CD
-0.5
-1.0
-1.5
-2.0 Ordr: 2.016 0 40 80 120 160 200 Freq: 134.53 Time in mSecs Spec: .727
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P3H #3 BEARING-PUMP HORIZONTAL 1.0 ROUTE SPECTRUM 20-NOV-95 01:58:31 OVRALL= .6703 V-DG 0.8 PK = .6638
.)
LOAD =4250.0 2C) RPM = 3998.
RPS = 66.63 C 0.6 0
0 CD 0.4 . . . . . . . . . . . . . Delete Discrete Peak 0v
@ 4x Booster Pump RPM:
(0.670)2 = (OA Level)2 0.2 . . . . . . . . . . . . . . . . . - (0.518)2 = (4x BP RPMPeak) 2
. . A..
Subtract Sq Values 0
__ - ..1t11
_'--- . _ rk - -. ss A
___J (0.181)0°5 = 0.425 In/Sec OA 0 1 2 3 4 5 6 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 20-NOV-95 01:58:31 PK = .7635 PK(+) = 1.23 1.0 PK(-) = 1.18 0a) CRESTF= 2.16 Cn 0.5 C
0 a)
-0.5
-1.0
-1.5
-2.0 Ordr: 2.016 0 40 80 120 160 200 Freq: 134.34 Time in mSecs Spec: .518
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P3H #3 BEARING-PUMP HORIZONTAL 1.0 ROUTE SPECTRUM
! 25-MAY-94 09:27:30 OVRALL= .8515 V-DG 0.8 ......... ............. j PK = .8488 LOAD =4250.0 0
I RPM = 4060.
RPS = 67.66 C 0.6 4x BOOSTER
.c 0
4)
.. . . . . . . . . . PUMP RPM .......... ........ : Delete Discrete Peak a-
> 0.4 @ 4x Booster Pump RPM:
CL 2x RPM . . . . . . . . . q.. . . . . . . . (0.852)2 = (OA Level)2 1x RPM
- (0.710)2 = (4x BP RPM Peak) 2 0.2 . . .. . -- Subtract Sq Values
... . _ . . . . . . . . (0.222)0.5 = 0.471 In/Sec OA 0 _ w__
I 0 1 3 4 5 6 Frequency In Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:27:30 PK = .8944 PK(+) = 1.16 1.0 PK(-) = 1.43 CRESTF= 2.43 0
C3 0.5 0
0) 0 0
-0.5
-1.0
-1.5
-2.0 Ordr 2.015 0 40 80 120 160 200 Freq: 136.32 Time In mSecs Spec: .710
IST - IST, P205 HPCI @42.5k HPCI ISTR -P4H #4 BEARING-PUMP HORIZONTAL 1.0 ROUTE SPECTRUM 24-NOV-04 00:54:26 OVRALL= .6774 V-DG 0.8 PK = .6719 0 LOAD =4250.0 RPM= 4017.
0.6 RPS = 66.95 0
0 0.4 Delete Discrete Peak EL @4x Booster Pump RPM:
(0.677)2 = (OA Level)2 0.2 (0.319)2 = (4x BP'RPM Peak) 2
. . . .I ------------- Subtract Sq Values (0.357)0.5 = 0.597 In/Sec OA 0
i I
W i_ ._
0 1 3 4 5 .6 Frequency in Order 2.0 ROUTE WAVEFORM 1.5 24-NOV-04 00:54:26 PK = .6896 PK(+) = 1.09 1.0 0
PK(-) = 1.13 0)
U)
CRESTF= 2.35 0.5 C.)
0 0
0)
-0.5
-1.0
-1.5
-2.0 0 40 80 Ordr: 2.017 120 160 200 Freq: 135.05 Time in mSecs Spec: .319
IST - IST, P205 HPCI @42.5k HPCI ISTR -P4H #4 BEARING-PUMP HORIZONTAL 1.0 ROUTE SPECTRUM 24-AUG-04 20:48:20 OVRALL= .6479 V-DG 0.8 PK = .6427 C3 ci, LOAD =4250.0 a) RPM = 3973.
Co RPS = 66.22 0.6
.G S
0 t 4x BOOSTER fg PUMP RPM Delete Discrete Peak
@ 4x Booster Pump RPM:
0.4 ,. . . . . . . . . . . . . . . . . .
Q1 2x RPM (0.648)2 = (OA Level) 2
- (0.425)2 = (4x BP RPM Peak)2 0.2 1x RPM--
. .. ...... . . . . . . . . . . . . . . . . . . . --------- Subtract Sq Values (0.239)°-5 = 0.489 In/Sec OA 0 _j I
2.0 0 1 I 2 3
Frequency in Order 4 5 6 ROUTE WAVEFORM 1.5 24-AUG-04 20:48:20 PK = .5804 PK(+) = 1.08 1.0 PK(-) = 1.08 0
ci) CRESTF= 2.48 0.5 C
._I 0
a)
-0.5
-1.0
-1.5
-2.0 Ordr 2.017 0 40 80 120 160 200 Freq: 133.57 Time in mSecs Spec: .425
RX - X203,P205 HPCI TURB & PUMP X203 HPCI -P4H #4 BEARING-PUMP HORIZONTAL 1.0 ROUTE SPECTRUM 17-DEC-97 16:53:18 OVRALL= 1.11 V-AP 0.8 PK = .5153 a LOAD =4250.0 a)
Cn RPM = 3996.
RPS = 66.61
.2%
C 0.6 a._0
- 0) 0.4 Delete Discrete Peak
@ 4x Booster Pump RPM:
(0.515)2 = (OA Level) 2 0.2 - (0.272)2 = (4x BP RPM Peak) 2
Subtract Sq Values (0.191)0.5 = 0.437 In/Sec OA Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 17-DEC-97 16:53:18 PK = .4948 PK(+) = .9773 1.0 PK(-) = .7628 0
a) CRESTF= 3.15 U) 0.5 C
0 aI)
-0.5
-1.0
-1.5
-2.0 Ordr: 2.013 0 40 80 120 160 200 Freq: 134.11 Time in mSecs Spec: .272
RX - X203,P205 HPCI TURB & PUMP X203 HPCI -P4H #4 BEARING-PUMP HORIZONTAL 1.0 ROUTE SPECTRUM 06-MAY-96 09:23:46 OVRALL= .6006 V-DG 0.8 PK = .6001 LOAD =4250.0 am RPM = 4009.
C RPS = 66.82 0.6 0.4 Delete Discrete Peak By
@ 4x Booster Pump RPM:
(0.601)2 = (OA Level) 2 0.2 - (0.421)2 = (4x BP RPM Peak) 2
Subtract Sq Values (0.184)°.5 = 0.429 In/Sec OA 0 A g _ ..... I 0 1 j 3 Frequency in Order 4 5 6 2.0 WAVEFORM DISPLAY 1.5 06-MAY-96 09:23:46 PK = .5673 PK(+) = 1.10 1.0 PK(-) = 1.03 0 CRESTF= 2.44
')
0.5 C
0 a) 0 0)
-0.5
-1.0
-1.5
-2.0 Ordr: 2.013 0 40 80 120 160 200 Freq: 134.53 Time in mSecs Spec: .421
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P4H #4 BEARING-PUMP HORIZONTAL 1.0 ROUTE SPECTRUM 20-NOV-95 02:00:49 OVRALL= .4777 V-DG 0.8 PK = .4756 LOAD =4250.0 am en RPM= 4000.
RPS = 66.66 C 0.6
- c 0
0)
- a. 0.4 Delete Discrete Peak y
@ 4x Booster Pump RPM:
(0.478)2 = (OA Level)2 0.2 - (0.251)2 = (4x BP RPM Peak) 2
Subtract Sq Values (0.166)0.5 = 0.407 In/Sec OA 0
Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 20-NOV-95 02:00:49 PK = .4798 PK(+) = .9286 1.0 PK(-) = .9515 0
cin CRESTF= 2.55 0.5 C
.) 0 0
0)
-0.5
-1.0
-1.5
-2.0 Ordr: 2.014 0 40 80 120 160 200 Freq: 134.25 Time in mSecs Spec: .251
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P4H #4 BEARING-PUMP HORIZONTAL 1.0 .
I ROUTE SPECTRUM 25-MAY-94 09:30:18 OVRALL= .6818 V-DG 0.8 . . . . . . . . . . . . . .
PK = .6814 a LOAD =4250.0 a)
RPM = 4061.
RPS = 67.69 C 0.6 . . . . . . . . . . . .
4x BOOSTER 0 ; 7 PUMP RPM Delete Discrete Peak 0)
EL 0.4 . . . . .. .. ... I @4x Booster Pump RPM:
0e 2x RPM ............
(0.682)2 = (OA Level)2
- (0.386)2 = (4x BP RPM Peak)2 0.2 1x RPM "X Subtract Sq Values (0.316)0.5 = 0.562 In/SecIOA 0*I
_ . I_C - .. I 0 1 2 3 4 5 6 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:30:18 PK = .6957 PK(+) = 1.12 1.0 PK(-) = 1.07
- 0) CRESTF= 2.47 c
0.5 C
0
-0.5
-1.0
-1.5
-2.0 Ordr 2.013 0 40 80 120 160 200 Freq: 136.28 Time in mSecs Spec: .386
IST - IST, P205 HPCI @42.5k I HPCI ISTR -P3V #3 BEARING-PUMP VERTICAL 1.0 ROUTE SPECTRUM 24-AUG-04 20:47:06 OVRALL= .2864 V-DG 0.8 PK = .2821 0 LOAD =4250.0 RPM= 3971.
RPS= 66.18 C 0.6 . . . . . . . . . . . . . . . . .
0
- 0) 0.4 . . . . . . ... . . . . . . . . . . . . . . . . . . .
0.2 .. . . . . . . . . ... . . . . . . . . . .... .....
0 4 5 6 Frequency in Order 2.0 ROUTE WAVEFORM 1.5 24-AUG-04 20:47:06 PK = .2857 PK(+) = .6158 1.0 PK(-) = .5457 0 CRESTF= 3.05 Cn 0.5
.5 0 0
0)
-0.5
-1.0
-1.5
-2.0 Ordr 2.019 0 40 80 120 160 200 Freq: 133.59 Time in mSecs Spec: .151
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P3V #3 BEARING-PUMP VERTICAL 1.0 ROUTE SPECTRUM I
25-MAY-94 09:28:50 OVRALL= .2848 V-DG 0.8 PK = .2827 0 LOAD =4250.0 a) cit, RPM= 4075.
RPS = 67.92 C
C._
0 a)
.E_
0.6 0.4 0e 0.2 0
0 I
1
+ 3
- i. A.
4 S 6 J.
Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:28:50 PK = .2926 PK(+) = .5419 1.0 PK(-) = .5849
- 0) CRESTF= 2.79 a 0.5 C
.5Z 0 0
0)
-0.5
-1.0
-1.5
-2.0 Ordr 2.006 0 40 80 120 160 200 Freq: 136.25 Time in mSecs Spec: .100
IST - IST, P205 HPCI @42.5k HPCI ISTR -P3A #3 BEARING-PUMP AXIAL 1.0 ROUTE SPECTRUM 24-AUG-04 20:47:48 OVRALL= .4050 V-DG 0.8 ... . . . . . . . . . . . . . . . . . . . . . .. .. .. . .... . . . . . . . . . . . . . . . . . . ... . . . . . . ....... PK = .4031 LOAD =4250.0 RPM= 3975.
aD RPS = 66.25 0.6 . . . .. . .. . .. . . .. . .. .. . . .. .. . .. . .. .. .. . ,
0 s - . ,iI a)
V 0.4 . . . . . . . . . ... . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . '
aL 0.2 . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . ... . .. . . . . . . . . . . .....
0 0 1 2 3 4 5 6 Frequency in Order 2.0 ROUTE WAVEFORM 1.5 24-AUG-04 20:47:48 PK = .4090 PK(+) = .6046 1.0 PK(-) = .6451 0
a) CRESTF= 2.24 0.5 Co
.C 0
0 a)
-0.5
-1.0
-1.5
-2.0 Ordr: 2.017 0 40 80 120 160 200 Freq: 133.63 Time in mSecs Spec: .363
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P3A #3 BEARING-PUMP AXIAL 1.0 ROUTE SPECTRUM I
25-MAY-94 09:29:50 OVRALL= .3312 V-DG 0.8 PK = .3370 a)
LOAD =4250.0 2 RPM = 4059.
RPS = 67.64 0.6 . . ... . . . . . . . . . . . . ... . . . . . . . ......
.D 0
a 0.4 ci I:
0.2 0 .. - ; ,. I.
0 1 2 3 4 5 6 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:29:50 PK = .3123 PK(+) = .4462 1.0 PK(-) = .4855 CRESTF= 2.25 C) co 0.5 Co 0
0)
-0.5
-1.0
-1.5
-2.0 Ordr 2.014 0 40 80 120 160 200 Freq: 136.23 lime in mSecs Spec: .280
IST - IST, P205 HPCI @42.5k HPCI ISTR -P4V #4 BEARING-PUMP VERTICAL 1.0 ROUTE SPECTRUM 24-AUG-04 20:48:46 OVRALL= .1474 V-DG 0.8 PK = .1341 0 LOAD =4250.0 C)
C,, RPM = 3976.
RPS = 66.27 0.6 0
0 0.4 a.
0.2 CI 0 1 I 3 4 I. L 5 6 Frequency in Order 2.0 ROUTE WAVEFORM 1.5 24-AUG-04 20:48:46 PK = .1549 PK(+) = .3373 1.0 PK(-) = .2904
- 0) CRESTF= 3.07 0.5 C.,
0 0
0)
-0.5
-1.0
-1.5 I~
-2.0 Ordr 2.016 0 40 80 120 160 200 Freq: 133.59 Time in mSecs Spec: .07974
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P4V #4 BEARING-PUMP VERTICAL I 1.0 I ROUTE SPECTRUM 25-MAY-94 09:30:46
.. . . .. . . . .. . . . . OVRALL= .1682 V-DG 0.8 PK = .1634 a LOAD =4250.0 a) RPM = 4055.
Co RPS= 67.58 0.6 C
0 a) 0.4 a_
0.2 0 1 3 4 5 6 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:30:46 PK = .1584 PK(+) = .3902 i.o PK(-) = .2620 0 CRESTF= 3.35 0.5 0
0
-0.5 0 AN
-1.0
-1.5
-2.0 ____
- I -1 J-- I-- Ordr: 2.016 0 40 80 120 160 200 Freq: 136.25 Time in mSecs Spec: .07871
IST - IST, P205 HPCI @42.5k HPCI ISTR -P7H #7 BEARING-PUMP INBOARD HORIZ 1.0 .
ROUTE SPECTRUM I
24-AUG-04 20:51:42 OVRALL= .3277 V-DG 0.8 I....... PK = .2404 .
0 LOAD =4250.0 U) . . ... ... . . . ... . . . . .. . . . .. . . RPM= 2005.
C 0.6 ' . . . .. . . ... . . . . . . . . . .
RPS = 33.42 0
0.4
- a. . .. . .. . . . .
0.2 0 _1 0 1 2 3 4 5 6 Frequency in Order 2.0 ROUTE WAVEFORM 1.5 24-AUG-04 20:51:42 PK = .3180 PK(+) = .6541 1.0 PK(-) = .6249 a CRESTF= 2.91 0.5 ci)
.' 0 0
w1
-0.5
-1.0
-1.5
-2.0 Ordr 4.002 0 40 80 120 160 200 Freq: 133.75 Time in mSecs Spec: .178
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P7H #7 BEARING-PUMP INBOARD HORIZ 1.0 I, ROUTE SPECTRUM 25-MAY-94 09:33:50
. .: . OVRALL= .3657 V-DG 0.8 ......... .. .. ...... . . .. . . . . . PK = .6181 LOAD =4250.0 0
RPM = 2029.
RPS = 33.81 C 0.6 . . . . . . . . . . . . . . . . . . . . . .
0) 0.4 .. .. . .. . . . . . . . . . . . . . . . . . . . . . .
a.
0.2 ........
0 0 1 2 3 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:33:50 PK = .6344 PK(+) = 1.20 1.0 PK(-) = 1.13 CRESTF= 2.74 0.5 C.,
0 cii
-0.5
-1.0
-1.5
-2.0 Ordr 4.033 0 40 80 120 160 200 Freq: 136.36 Time in mSecs Spec: .198
IST - IST, P205 HPCI @42.5k HPCI ISTR -P7V #7 BEARING-PUMP INBOARD VERTICAL 1.0 ROUTE SPECTRUM 24-AUG-04 20:52:14 OVRALL= .2490 V-DG 0.8 .............. ........... PK = .1579 2ax)
LOAD =4250.0 RPM= 2000.
RPS = 33.33 C
0.6 .............. . . . . . . . .
0 0
C) 0.4 . . .
0d 0.2 .. . . . . . . . . ... . . . . . . :.......-....... ......
0 1 2 Frequency in Order 2.0 ROUTE WAVEFORM 1.5 24-AUG-04 20:52:14 PK = .2830 PK(+) = .5677 1.0 PK(-) = .5496 0
- 0) CRESTF= 2.84 C,,
0.5
.s.a 0 0
i)
-0.5
-1.0
-1.5
-2.0
. Ordr 4.010 0 40 80 120 160 200 Freq: 133.67 Time InmSecs Spec: .08995
RX - X203, P205 HPCI TURB & PUMP I X203 HPCI -P7V #7 BEARING-PUMP INBOARD VERTICAL 1.0 I ROUTE SPECTRUM 25-MAY-94 09:35:00 OVRALL= .3629 V-DG 0.8 . . . . . . . . . . . . . . . . . . . . . . . . . .
. P PK = .4330 0 LOAD =4250.0 a) RPM= 2045.
U, RPS = 34.08 C 0.6 . .. .. .. . .................. . .
0 a) 0.4 . .. .. .. . . . . . . . . . . . . . .
a.
0.2 . . . . . .. . . . . . .
A. . . . . . .
0 1 2 3 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:35:00 PK = .8398 PK(+) = 1.41 1.0 PK(-) = 2.08 0 CRESTF= 2.97 CD 0.5 0
a,
-0.5
-1.0
-1.5
-2.0 Ordr. 4.000 0o 40 80 120 160 200 Freq: 136.34 Time In mSecs Spec: .08568
IST - IST, P205 HPCI @42.5k HPCI ISTR -P8H #8 BEARING-PUMP OUTBOARD HORIZ 1.0 ROUTE SPECTRUM I
24-AUG-04 20:52:44 OVRALL= .4133 V-DG 0.8 . .. . .. .. PK = .3018 a LOAD =4250.0 wD, C RPM= 2004.
C RPS = 33.40 0.6 .. .. .. .. .. ..
.5 0
a) 0.4 .. . . . . . . . . . .
a.
0.2 _ .. . . . . . . . . ..
0 0 1 2 3 Frequency InOrder I 5 6 2.0 ROUTE WAVEFORM 1.5 24-AUG-04 20:52:44 PK = .4196 PK(+) = .8194 1.0 PK(-) = .8356 0
- 0) CRESTF= 2.82 0.5 og 0 0
a)
-0.5
-1.0
-1.5
-2.0 Ordr: 3.999 0 40 80 120 160 200 Freq: 133.58 Time in mSecs Spec: .266
RX - X203, P205 HPCI TURB & PUMP I X203 HPCI -P8H #8 BEARING-PUMP OUTBOARD HORIZ 1.0 ROUTE SPECTRUM 25-MAY-94 09:36:10 OVRALL= .3571 V-DG 0.8 . . . . . . . . . . . . .................... PK = .4744 C> LOAD =4250.0 a)
C', RPM= 2046.
2 RPS= 34.11 C 0.6 L. I . . . . .
0) 0)
0.4 . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . .
0L 0.2 0
Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:36:10 PK = .6248 PK(+) = .9390 1.0 PK(-) = 1.23
- 0) CRESTF= 2.71 0.5 C, 0 0
0)
-0.5
-1.0
-1.5
-2.0 Ordr 3.9'99 0 40 80 120 160 200 Freq: 136..38 Time in mSecs Spec: .2448
IST - IST, P205 HPCI @42.5k HPCI ISTR -P8V #8 BEARING-PUMP OUTBOARD VERTICL 1.0 ROUTE SPECTRUM 24-AUG-04 20:53:08 OVRALL= .3336 V-DG 0.8 PK = .1177 0 LOAD =4250.0
.) RPM= 1985.
RPS = 33.09 C 0.6
.5 0
0) 0.4 0V 0.2 Frequency in Order 2.0 ROUTE WAVEFORM 1.5 24-AUG-04 20:53:08 PK = .3259 PK(+) = .7410 1.0 PK(-) = .7385 0
- 0) CRESTF= 3.22 0.5 C
au 0
0)
-0.5
-1.0
-1.5
-2.0 Ordr. 4.033 0 40 80 120 160 200 Freq: 133.44 Time in mSecs Spec: .06510
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P8V #8BEARING-PUMP OUTBOARD VERTICL 1.0 ROUTE SPECTRUM 25-MAY-94 09:36:36 OVRALL= .3279 V-DG 0.8 ... .............. I . . . . . . . . PK = .4190 0 LOAD =4250.0 a)
RPM = 2025.
RPS = 33.75 0.6
.i3
- a. 0.4 :,, .. .. . ; .. . . .. ..
~~~~~...
0.2 0
0 1 2 3 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:36:36 PK = .5485 PK(+) = .8559 1.0 PK(-) = 1.89 0
a) CRESTF= 4.52 Cl) 0.5 C
0 0
a1)
-0.5
-1.0
-1.5
-2.0 Ordr: 4.035 0 40 80 120 160 200 Freq: 136.18 Time in mSecs Spec: .107
IST - IST, P205 HPCI @42.5k HPCI ISTR -P8A #8 BEARING-PUMP OUTBOARD AXIAL 1.0 ROUTE SPECTRUM 24-AUG-04 20:53:30 OVRALL= .1736 V-DG 0.8 PK = .1499 LOAD =4250.0 0
a) RPM = 2003.
RPS = 33.38 CD 0.6 0
0 a) 0.4 0.2 0
Frequency In Order 2.0 ROUTE WAVEFORM 1.5 24-AUG-04 20:53:30
- PK = .2222 PK(+) = .4984 1.0
- PK(-) = .4466 Ci) a)
CRESTF= 3.17 0.5
.5 0
0)
-0.5
-1.0
-1.5
-2.0 Ordr: 4.000 0 40 80 120 160 200 Freq: 133.51 Time in mSecs Spec: .03090
RX - X203, P205 HPCI TURB & PUMP X203 HPCI -P8A #8 BEARING-PUMP OUTBOARD AXIAL 1.0 ROUTE SPECTRUM 25-MAY-94 09:37:08 OVRALL= .2237 V-DG 0.8 PK = .2715 a LOAD =4250.0 a)
RPM = 2042.
RPS = 34.03 0.6 ... . . . . . . . .
.D 0
C) 0.4 . . . . .. . . .. . . . . . . .. . . .
0y I
0.2 Frequency in Order 2.0 WAVEFORM DISPLAY 1.5 25-MAY-94 09:37:08 PK = .3873 PK(+) = 1.02 1.0 PK(-) = .8513 c)
CD CRESTF= 2.65 0.5 C
C.)
0_
CD
-0.5
-1.0
-1.5
-2.0 Ordr. 4.008 0 40 80 120 160 200 Freq: 136.40 Time in mSecs Spec: .05659