ML041470417

Technical Specification Proposed Change No. 263 - Supplement No. 7 Extended Power Uprate - Confirmatory Results

ML041470417
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png (DPR-028)
Issue date:	05/19/2004
From:	Thayer J Entergy Nuclear Northeast
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BVY 04-050, FOIA/PA-2004-0267
Download: ML041470417 (60)

Text

Entergy Nuclear Northeast Entergy Nuclear Operations, Inc.

Vermont Yankee 185 Old Ferry Rd.

,-~

nt g P.O. Box 500 Brattleboro, VT 05302 Tel 802-257-5271 May 19, 2004 BVY 04-050 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

Subject:

Vermont Yankee Nuclear Power Station License No. DPR-28 (Docket No. 50-271)

Technical Specification Proposed Change No. 263 - Supplement No. 7 Extended Power Uprate - Confirmatory Results By letter dated January 31, 2004', Vermont Yankee2 (VY) supplemented its September 10, 2003, license amendment requests (LAR) to increase the maximum authorized power level for the Vermont Yankee Nuclear Power Station (VYNPS) from 1593 megawatts thermal (MWt) to 1912 MWt. The information provided on January 31, 2004, consisted of VY's response to a draft NRC request for additional information 4 (RAI). At the time, VY's analyses were not complete with regard to the two RAls discussed below.

NRC Electrical Engineering Section (EEIB-B) RAI No. I requested the results of the additional analysis referenced in section 10.3.1 of the Power Uprate Safety Analysis Report5 (PUSAR) regarding the effect of the extended power uprate (EPU) on the environmental qualification of electrical equipment in harsh environments located inside and outside the containment. to this letter provides the information requested. The results of the analysis show that safety-related electrical components are qualified for operation under EPU conditions.

NRC EEIB-B RAI No. 3 requested the evaluation referenced in section 6.1.2 of the PUSAR regarding operation of the condensate and feedwater pump motors at higher summer temperatures at EPU conditions. to this letter provides the information requested.

The non-safety-related condensate pump motors and feedwater pump motors have been evaluated for operation under EPU conditions and were determined to be acceptable for such application. In addition, associated support components (e.g., cable, instrumentation and controls) were also confirmed to be adequate for EPU

' Vermont Yankee letter to U.S. Nuclear Regulatory Commission, "Technical Specification Proposed Change No. 263, Supplement No. 5, Extended Power Uprate - Response to Request for Additional Information,"

BVY 04-008, January 31,2004.

2 Entergy Nuclear Vermont Yankee, LLC and Entergy Nuclear Operations, Inc. are the licensees of the Vermont Yankee Nuclear Power Station.

3 Vermont Yankee letter to U.S. Nuclear Regulatory Commission, "Technical Specification Proposed Change No. 263, Extended Power Uprate," BVY 03-80, September 10, 2003.

4 A draft NRC request for information (RAI) was transmitted on December 18, 2003, to VY as documented in NRC memorandum from Richard B. Ennis to Darrell J. Roberts under TAC No. MC0761.

5 The Power Uprate Safety Analysis Report was provided as Attachment 4 (proprietary version) and Attachment 6 (non-proprietary version) to VY's September 10, 2003 LAR.

if0

BVY 04-050 / Page 2 conditions. Vendor recommendations contained in the evaluation will be addressed in accordance with the VYNPS design change process.

This LAR supplement provides additional information that does not expand the scope of the original application, nor does it change VY's determination of no significant hazards consideration.

The information provided herewith is not considered to be proprietary information in accordance with I OCFR2.390 and there are no new regulatory commitments associated with this LAR supplement.

If you have any questions, please contact Mr. James DeVincentis at (802) 258-4236.

Sincerely,

~ayy). Gayer kXVice President STATE OF VERMONT

)

)ss WINDHAM COUNTY

)

Then personally appeared before me, Jay K. Thayer, who, being duly sworn, did state that he is Site Vice President of the Vermont Yankee Nuclear Power Station, that he is duly authorized to execute and file the foregoing document, and that the statements therein are true to the best of his knowledge and belief.

Mary J. V r, Notary Public My Commission Expires February 10, 2007 e

" OTAT Attachments (2)m.

cc:

USNRC Region I Administrator (v/o attachments)

USNRC Resident Inspector - VYNPS (wv/o attachments)

C///

\\\\O"\\S USNRC Project Manager - VYNPS l\\\\\\

Vermont Department of Public Service

Docket No. 50-271 BVY 04-050 Attachment No. 1 Vermont Yankee Nuclear Power Station Technical Specification Proposed Change No. 263 Supplement No. 7 Extended Power Uprate - Confirmatory Results Equipment Qualification

Response to NRC EEIB-B RAI No. 1 NRC EEIB-B RAI No. 1 requested the following: Provide the results of the additional analysis referenced in Section 10.3.1 of Attachment 6 [Power Uprate Safety Analysis Report (PUSAR)] of your submittal dated September 10, 2003, for the effect of the EPU on the environmental qualification (EQ) of electrical equipment in harsh environments located inside and outside the containment.

Section 10.3.1 of Attachment 6 evaluated the change in plant environments as they relate to the Vermont Yankee Nuclear Power Station (VYNPS). The submittal states in Part:

"Inside Containment"

"...the total integrated doses (normal plus accident) for [constant pressure power uprate]

CPPU conditions were determined to challenge the qualification of some equipment located inside containment. Equipment that required further evaluation included certain cable types, splices, and electrical penetrations. A qualitative evaluation, using equipment-specific radiation dose assessment, indicates that with additional analysis, the equipment should be acceptable for the CPPU conditions."

"Outside Containment"

"...the total integrated doses (normal plus accident) for CPPU conditions were evaluated.

There were several types of equipment located outside of containment that were adversely affected by the radiation dose increase. A qualitative evaluation, using equipment specific radiation dose assessment indicates that with additional analysis, the equipment should be acceptable for the CPPU conditions" The VYNPS TID-14844 source term based radiation analysis is contained in a plant calculation. The calculation divided the plant into volumes or zones and determined a generic integrated dose for the volume. Additional equipment specific analyses have been added to the calculation over the years as needed. For CPPU the total integrated dose for each volume, or specific analysis, was adjusted using a scaling methodology.

This evaluation was captured in a Technical Evaluation (TE). The statements in the PUSAR were developed based on the TE results. The TE identified a number of volumes or specific analyses where the CPPU integrated dose exceeded the qualified dose of the equipment located in that volume. Subsequently, a new calculation was prepared that performed localized specific analyses for those components identified for CPPU conditions.

While preparing the new calculation it was discovered that the original radiation dose calculation failed to consider the internal post-LOCA drywell air radiation dose to some equipment. The re-evaluation to correct this error was included in the new calculation.

The following is a summary of the major adjustments to the current licensing basis (CLB)

EQ dose specifications that were incorporated in the present calculation:

Page I of 7

Response to NRC EEIB-B RAI No. 1 A.

LOCA Source Term (1)

The source term for airborne releases was updated (using ORIGEN-2.1 and data libraries for extended burnup) to reflect 1950 MWt, 4.65 wt % U-235, 3-cycle and 3-region core configuration, 52.4 GWD/MTU, and three potential accident times during the 3rd cycle (for sensitivity evaluations).

The CLB model had a single cycle, end-of-cycle inventories, and a power level of 1665 MWt (based on ORIGEN-1).

(2)

For the waterborne source term, the ORIGEN-2.1 computer runs were also used to produce the time-dependent photon spectra emanating from contaminated liquids. The radionuclide core-inventory fractions which were assumed to be released to the liquids were 0% noble gases, 50% halogens, and 1% of the others (also identified as a 0/50/1 mixture of "noble-gases/halogens/others")'

The noble gases produced by the decay of waterborne halogens were assumed to remain within the coolant and contribute to the dose.

The CLB model was overly conservative and assumed a mix of 100/50/1, implying that all core-inventory noble gases will remain in the liquid phase.

B.

Submersion Doses in Drywell (1)

Consideration was given to the noble gas decay products (Rb and Cs) in the dose calculations. The software employed in the CLB analysis did not have that capability.

(2)

The airborne fraction of halogens was conservatively assumed to be 25%, and to be unaffected by plateout and spray effects. The other half of the released iodines (25%

of the core inventory) is expected to be retained by the primary coolant. This assumption differs from the original VYNPS EQ analysis which was based on 50% of the halogens remaining airborne for the duration of the accident.

(3)

The gamma doses were computed with an improved point-kernel shielding computer code for obtaining the time-dependent dose rates and cumulative doses.

C.

Submersion Doses in Reactor Building (1)

Consideration was given to the noble gas decay products (Rb and Cs) in the dose calculations. The software employed in the CLB analysis did not have that capability.

I Photon spectra were also calculated for a 0/25/1 mix, for the dose to equipment components that are exposed to both airborne and waterborne sources. Use of these spectra could have reduced the doses by about 17%; however, it was determined that this dose reduction credit was not necessary, and was not implemented.

Page 2 of 7

Response to NRC EEIB-B RAI No. I (2)

Credit for mixing in the Reactor Building (RB) was increased from 50% to 100%

of the building volume, and the RB exhaust rate was increased from 1 air change per day to 1.140 (the latter corresponding to the SGTS design flow rate of 1500 cfm with single-fan operation, less 100 cfm). Use of full mixing in the RB is justifiable since the SGTS flow distribution, drawing air from all elevations of the reactor building via the same ductwork as the normal ventilation exhaust, along with diffusion through the open equipment hatch, will lead to practically uniform concentration within the entire RB in a short time (in comparison to the exposure interval of one year).

(3)

The immersion gamma doses in the RB were reduced by taking credit for the actual volume contributing to dose in each floor, in lieu of the entire RB volume.

D.

Adjustments to Drywell and RB Beta Doses for Shielding and Small Submersion Volumes.

(1)

The beta shielding provided by component sheathing and coatings was based on a tabulation of adjustment factors prepared through the use of Monte Carlo calculations. In the CLB, the shielding adjustment factors were based on different approaches, depending on radionuclide.

(2)

Changes in beta-shielding thicknesses between the CLB and those used in the present calculation. It is noted that the CLB thicknesses were conservatively selected, and do not reflect the actual conditions.

The results of this new calculation are summarized in the following table. The major differences discussed above apply to all the components in the table. In addition, the table has comments for specific dose adjustments.

Page 3 of 7

Response to NRC EEIB-B RAI No. 1 Oual.r21 CLBE31 CPPUt41 CommentsE~

Qualification Documentation Review Pckag(QDR) #and Componentlt l (rad)

(rad)

(rad)

QDR 3.1 - Limitorque Valve Operators - RB above El. 223:9" outboard of torus 2.OOE+07 1.80E+07 1.96E+07 C 1, C4, C7 QDR 35.2A - Target Rock Model 75E Solenoid Valves NG-13A and NG-13B - RB El. 213'-9" & 232'-6" I.OOE+08 7.47E+06 8.69E+06 C 1, C7, C9 QDR 8.7 - Teledyne H2/02 Analyzers - Parts not in contact with drywell nor RB air-RB El. 280'-0" Vol 29 1.60E+06 1.59E+06 4.29E+05 Cl QDR 36.3 - Filnor Knife Switch - RB El. 280-O" Vol 21 - Fuel Pool Line Area 1.34E+06 1.31 E+06 1.23E+06 C I QDR 35.2A - Target Rock Model 75E Solenoid Valve VG-9A - RB El. 303'-0" [Dose during post-LOCA drywvell purge]

1.00E+08 8.51E+04 7.18E+07 Cl. C3, C8 QDR 5.1 - Rosemount Model 710 DU Trip/Cal Systems, ECCS Cabinet 25-5B Circuit Boards - RB El. 280'-0" Vol. 20 2.OOE+05 1.95E+05 1.93E+05 Cl, C3 QDR 5.2 - Rosemount Model 510 DU Trip/Cal Systems - ECCS Cabinet 25-6B Circuit Boards - RB El. 280'-0" Vol. 22 1.90E+05 1.75E+05 1.48E+05 Cl, C3 QDR 6.4 Rockbestos (CERRO) XLPE/Firewall III Cable - RB El.

280'-0" and Vol 41 1.84E+08 4.79E+07 1.11E+08 CI, C13 QDRs 10.1 and I0.1A - Chromalox 9 KWDuct Heaterand High Temperature Cut-Out Switch - RB El. 280'-0" Vol. 29 4.80E+07 4.35E+07 1.28E+07 Cl QDR 35.2A - Target Rock Model 75E Solenoid Valve - RB El. 280'-

O" Vol 29 1.OOE+08 I.50E+06 9.64E+05 Cl. C7 QDRs 6.14, 14.3, 16.2. 35.3 - RB El. 280'-0" Vol 29 2.00E+08 8.53E+07 3.13E+07 CI QDR 9.3 - Microswitch Limit Switches - RB El. 280-0" Vol 29 7.80E+07 7.75E+07 2.85E+07 C1 QDR 8.7 - Teledyne H2/02 Analyzer A - 02 Membrane - RB El.

280'-0" Vol 29 p30-day LOCA Dosel 1.OOE+08 9.42E+06 5.73E+07 Cl, C3, C12 QDR 8.7 -Teledyne H2/02 Analyzer A - Pump/Regulator Diaphragms - RB El. 280-0" Vol 29 [30-day LOCA Dose]

2.OOE+08 1.60E+07 1.1 1E+08 Cl, C3, C12 QDRs 8.7, 35.3 - Teledyne H2/02 Analyzers / Solenoid Valves - RB El. 280'-0" Vol 29 [30-day LOCA Dose]

6.OOE+07 8.87E+06 5.53E+07 Cl. C3, C12 QDR 8.7 - Teledyne H2/02 Analyzers - Flow Alarms - RB El. 280'-

0" Vol 29 [30-day LOCA Dosel 2.00E+08 6.78E+06 4.06E+07 Cl, C3. C12 QDR 34.4 EGS/PATEL P1 Thread Sealant - Drywell outside sacrificial shield 1.70E+08 1.56E+08 7.97E+07 Cl. C3 QDR 6.23 - Rockbestos RSS-6-104 Coaxial Cable - Drywell Below El. 290', >S' from Recirc Pipe & at least 3' from sacrificial shield openings 1.71E+08 1.71E+08 8.59E+07 Cl, C3 QDR 15.3 GE Penetration Assembly Cable - Drywell Below El.

290, within S' of Recirc Pipe & at least 3' from sacrificial shield 1.80E+08 1.60E+08 1.62E+08 Cl, C3 QDRs 6.4-2, 6.29, 6.31,16.2 Cable - Drywell Below 270, > 5' from Recirc Pipe & at least 3' from sacrificial shield openings 1.84E+08 1.83E+08 1.29E+08 Cl, C3 QDR 2.1 Westinghouse MCC-8B - RB El. 280'-0" Vol 29 8.70E+05 8.63E+05 8.26E+05 Cl. C3 QDR 2.1 Westinghouse MCC-DC-2A - RB El. 280'-0" Vol 21 8.70E+05 8.15E+05 8.08E+05 Cl QDR 2.1 Westinghouse MCC-9B - RB El. 280'-0" Vol 22 8.70E+05 7.29E+05 7.61E+05 Cl QDR 8.3 ITT-Barton Differential Pressure Switch - RB El. 213'-9" Vol 53 I.OOE+06 9.79E+05 8.46E+05 Cl QDR 8.3 - Barton 288t289 Pressure Switch - RB El. 213'-9" Vol 32 1.002+06 9.79E+05 8.46E+05 Cl QDR 8.3 - Barton 288/289 Pressure Switch - RB El. 213'-9" Vol 53 1.OOE+06 9.79E+05 8.46E+05 Cl Page 4 of 7

Response to NRC EEIB-B RAI No. 1 Footnotes

[1] These are the components that were identified in a conservative screening process to potentially exceed their qualification dose limits.

[2] Equipment qualification radiation level in rads. Equipment is qualified to the given value.

[3] The current dose specification is based on a power level of 1665 MWt. The current licensed power level is 1593 MWt.

[4] Constant Pressure Power Uprate (CPPU) is 120% of the current licensed power level, or 1912 MWt. The dose specification for CPPU is based on 1950 MWt.

[5] References are to comments appended to the end of the table.

Page 5 of 7

Response to NRC EEIB-B RAI No. 1 COMMENTS DESCRIPTION Value or Adjustment The 40-year normal background doses were adjusted by the factor [32* 1593 + 8*(1950/1.02)] / (40* 1593) =

Cl 1.040, reflecting a 20% increase in the background radiation levels as a result of power uprate, and an estimated Background 1.040 8-year operation at the EPU level. (See Comment C6 for exception.)

C2 Power level adjustment factor for LOCA beta and gamma doses (1950 MWtY1665 MWt)

LOCA, 1.171

___beta/gamma C3 Dose adjustments applying finite cloud and/or shielding.

The dose listed for the Limitorque Valve Operators from post-LOCA torus sources in the current licensing basis (i.e., pre-EPU, namely, 1.46E+07 rad) was incorrect. The actual dose is 1.36E+07 rad. This dose is due to both Typo plus C4 airborne and waterborne sources within the torus. Adjusting for the power level (see C2), the corrected dose is power 1.59E+07 1.36E+07

• 1.171 = 1.59E+07 rad.

adjustment The doses listed for the 24 vdc power supplies are for a HPCI Line Break, based on the technical specification limit of 1.1 ItCi/gm DE-1131 [TS 3.6 (B)], and the activity release rate to the atmosphere of 0.16 Ci/sec (after 30 min decay) [TS Sec. 3.8(K)]. The current licensing basis (i.e., pre-EPU) analysis used 1.1,ICi/gm DE-1131 in the coolant, and 0.3 Ci/sec for the atmospheric release, and is therefore bounding.

C5 There is no beta dose since the Technipower power supplies are sealed in metal containers; there is no access to Shielding any components within the supplies.

adjustment 0.0 The gamma dose listed for the 24 vdc power supplies in the current licensing basis (i.e., pre-EPU, namely 14 T

p rad) is not correct. The actual dose is 1.4 rad. Adjusting for the power level (see C2), the corrected dose is 1.4

• ypo plus 1.171 = 1.64 rad.

power 1.6 adjustment The component life time in the current licensing basis (i.e., pre-EPU) is currently limited to 10 years. Following power uprate, the normal background radiation is expected to be 12 mrad/hr (a 20% increase on the pre-uprate C6 value). In order to maintain the qualification limit under both pre-and post-uprate levels, these components gamma 841 must now be replaced every 8 years (corresponding to a background dose of 0.012

• 8760

• 8 = 841 rad).

Internal dose is not a concern and was considered to be zero. [Note: Internal doses to QDR 35.2A valves has C7 been considered (containment purge valves).]

Page 6 of 7

Response to NRC EEIB-B RAI No. 1 COMMENTS DESCRIPTION Value or Adjustment Drywell purge under the CLB is based on purge initiation at 192 hours0.00222 days <br />0.0533 hours <br />3.174603e-4 weeks <br />7.3056e-5 months <br /> and continued through I year. The corresponding basis for the EPU calls for intermittent purging starting at 35 days post LOCA to maintain drywell C8 pressure below 28 psig. The valve internal exposure in the present application was conservatively assumed to cover the interval from 192 hrs to one year, for both the CLB and the EPU; the external gamma exposure is for one year.

C9 The dose listed is from post-LOCA torus sources. It was calculated using the power adjustment factor under C2.

CIO The dose to internal components due to drywell air is included.

Cl 1Limitorque MOVs dose contribution from the SGTS filters.

Dose is for the 30-day mission time and the doses from "Gamma LOCA Other" (i.e., from the SGTS filters in C 12 these cases) are for one-year exposure.

C13 ELEC31 cable requirement that the cable be in excess of 2 ft away from the SGTS carbon beds.

Page 7 of 7

Docket No. 50-271 BVY 04-050 Attachment No. 2 Vermont Yankee Nuclear Power Station Technical Specification Proposed Change No. 263 Supplement No. 7 Extended Power Uprate - Confirmatory Results Condensate and Feedwater Pump/Room Evaluation

May 18, 2004 Report Body Page I of 17 Total No. of Pages 49 Project Technical Report Condensate and Feedwater Pump/Room Evaluation Prepared for Entergy Vermont Yankee Nuclear Plant May 18,2004 Preparer U'

Preparer 6 <gReewer interdi scipli~ry Review I

/

Project Nanager 7.v'. A' t

Em ay/8 Zo'f Shaw/Stone & Webster, Inc.

Stoughton, MA 02072

May 18, 2004 Report Body Page 2 of 17 Total No. of Pages 49 Abstract/Summary The EPU BOP evaluations associated with the Condensate and Feedwater Pump systems recommended that a follow on confirmatory evaluation be performed to provide a well-documented basis for the acceptability of summer EPU room temperatures coincident with EPU loads on the pump motors.

This technical evaluation documents the acceptability of summer EPU room temperatures coincident with EPU loads on the Condensate and Feedwater Pump motors. Operation as follows is confirmed:

• Condensate Pump motors at approximately 2% above nameplate in a 500 C ambient.

• Feedwater Pump motors in a 450 C ambient.

The acceptability of summer EPU room temperatures on other potentially temperature sensitive components, i.e. cable, instruments, fan motors, etc., is also addressed.

1 Introduction 1.1 Condensate Pump and Pump Room (Ref 13)

The brake horsepower is calculated to increase by approximately 100HP (Ref 8) due to uprate. With this demand, the condensate pumps will exceed nameplate, but remain within the 15% service factor of the motors.

The total pump heat input to the room will increase due to higher total pumping power.

Room heatup projections with the higher pump motor load after EPU and the design summer river temperature of 850 F indicate that room temperatures up to 122° F are possible. Presently, the peak summer temperatures rarely exceed 1 19° F.

1.2 Reactor Feedwater Pump and Pump Room (Ref 13)

The brake horsepower demands on the reactor feedwater pumps will decrease for EPU due to operation of 3 pumps in parallel versus the current 2 pump combination.

The total pump heat input to the room will increase due to higher total pumping power with 3 pump operation. Room heatup projections with the higher 3 pump motor load and the design summer river temperature of 850 F indicate that room temperatures slightly higher than 105° F design temperature are possible after EPU. Presently, the peak summer temperatures rarely exceed 1000 F.

l

May 18, 2004 Report Body Page 3 of 17 Total No. of Pages 49 1.3 Objectives The objectives of the technical evaluation are:

1. Justify that condensate pump motors operating above nameplate during EPU conditions are acceptable.

2. Justify that the feedwater pump motors operating at nameplate during EPU conditions are acceptable.

3. Demonstrate/justify impact of elevated EPU condensate/feedwater pump room temperatures on other potentially temperature sensitive components, i.e. cable, instruments, fan motors, etc., within each room.

2 Conclusions/Recommendations 2.1 Condensate Pump and Pump Room The Westinghouse Condensate Pump Motors and the GE Condensate Pump Motor are adequate for operation at EPU conditions in the Condensate Pump Room. Westinghouse will provide new nameplates confirming 1600HP and 500 C ambient operation. GE has confirmed that operation up to a 5% load increase (1575HP) in a 50° C summer and 400 C remainder of year ambient environment is within its motor's capability.

Both the Westinghouse and the GE analyses bound the predicted pump flow run out condition of 1519HP (Ref 8).

The predicted EPU Thrust Bearing temperature exceeds the expected running temperatures recommended by Westinghouse (Ref 11) for mineral-oil-lubricated bearings. The lubricant used at VY is Mobil DTE heavy mineral oil with a continuous operating temperature limit of 2100 F (98.90 C). The existing 1750 F (79.4° C) Thrust Bearing temperature alarms should be changed to be consistent with expected operating conditions and maintain margin to lubricant temperature limit.

The predicted EPU Guide Bearing temperature exceeds the design temperature recommended by GE (Ref 12). GE has indicated that operation up to 2050 F (96.1° C) for a short period of time (one month) is acceptable, after which the lubricating oil would have to be replaced.

Medium voltage Condensate Pump Motor feeder cables are adequate for operation at EPU conditions in the Condensate Pump Room based on application of appropriate de-rating factors.

Low voltage power cables existing within the room are assumed to be operating at or below their thermal limit. They are adequate for EPU conditions in the Condensate Pump Room.

May 18, 2004 Report Body Page 4 of 17 Total No. of Pages 49 Control and instrument cables existing within the room are considered adequate for EPU conditions in the Condensate Pump Room based on continued operation within thermal capability.

Instruments, motors, and miscellaneous equipment are considered adequate for operation at EPU conditions in the Condensate Pump Room based on vendor manuals, drawings, etc. or expected life with respect to ambient conditions.

The protection curve for the Condensate Pump Motor (Ref 21) bounds the new EPU operating condition ampacity for both the Westinghouse and GE motors. A CCN or revision to Reference 21 should be issued to revise page B-6 to document the new operating conditions:

1. Both the Westinghouse and the GE analyses indicate new full load current for the Condensate Pump motors

2. Westinghouse will provide a new 1600HP nameplate for its Condensate Pump motors 2.2 Reactor Feedwater Pump and Pump Room The Westinghouse Reactor Feedwater Pump Motor is adequate for operation at EPU conditions in the Feedwater Pump Room. The predicted winding temperature of 103.40 C is within the allowable 1300 C temperature for a Class B insulation system.

Note: The allowable insulation temperature is applicable to the sum of any combination of temperature rise and ambient temperature bounded by the allowable insulation temperature.

The Feedwater Pump Motors remain adequate for all pump operating conditions including flow run out (Ref 8).

The predicted EPU pump Inboard and Outboard and motor Outboard Bearing temperatures exceed the expected running and alarm temperatures recommended by Westinghouse (Ref 11) for mineral-oil-lubricated bearings. The lubricant used at VY is Mobil DTE heavy mineral oil with a continuous operating temperature limit of 2100 F (98.90 C). The existing 1800 F (82.20 C) pump Inboard and Outboard and motor Outboard Bearing temperature alarms should be changed to be consistent with expected operating conditions and maintain margin to lubricant temperature limit.

Medium voltage Reactor Feedwater Pump Motor feeder cables are adequate for operation at EPU conditions in the Feedwater Pump Room based on application of appropriate de-rating factors.

May 18, 2004 Report Body Page 5 of 17 Total No. of Pages 49 Low voltage power cables existing within the room are assumed to be operating at or below their thermal limit. They are adequate for EPU conditions in the Feedwater Pump Room.

Control and instrument cables existing within the room are considered adequate for EPU conditions in the Feedwater Pump Room based on continued operation within thermal capability.

Instruments, motors, valves and miscellaneous equipment are considered adequate for operation at EPU conditions in the Feedwater Pump Room based on vendor manuals, drawings, etc. or expected life with respect to ambient conditions.

3 Technical Analysis 3.1 Condensate Pump and Pump Room 3.1.1 Room Ambient Calculation VYC-2279 (Ref 10) establishes the Current Licensing Thermal Power (CLTP) and EPU Condensate Pump Room ambient temperature:

Area Temperature

° F 0 C CLTP 109.7 43.2 Based on design CLTP 119 48.4 Based on empirical data EPU 113.2 45.1 Based on design EPU 122.5 50.3 Based on empirical data (data used in evaluation)

Note:

The BHP used in calculation VYC-2279 (Ref 10) to predict the room temperature is slightly less than the required BHlP indicated in the ERC Section 3.4.3 (Ref 8), i.e. 1493 vs. 1508HP. The factors used in determining the room temperature are conservative considering the worst-case heat balance and service water temperatures. Increasing the BHP of the condensate pumps to match the value in the engineering report introduces a room temperature increase of 0.2 deg C which is insignificant when considered with the conservative factors used in predicting the room temperature.

These temperatures are conservatively calculated bounding maximum temperatures.

Actual EPU maximum temperatures are anticipated to be lower than these bounding values.

May 18,2004 Report Body Page 6 of 17 Total No. of Pages 49 3.1.2 Condensate Pump Motor There are three Westinghouse and one GE Condensate Pump Motors and three Condensate Pumps. Three motors power the Condensate Pumps and one motor is spare.

Every refueling outage one motor is swapped out with the spare.

The Westinghouse Condensate Pump Motors have the following characteristics: 1500 HP, 1.15 SF, 4000V, 600 C rise, Class B insulation, Open Drip-Proof, 400 C Ambient (Ref 3 & 5).

The General Electric Condensate Pump Motor has the following characteristics: 1500 HP, 1.15 SF, 4000V, (900 C rise), (Class F insulation), Weather Protected I, (400 C Ambient) (Ref 4&(Ref 12)).

Attachment B summarizes VY plant operating temperature data (Ref 6) for the Condensate Pump Motor/Room. Data presented is highest temperature recorded per location during the several days of data collection. The highest and average temperature is calculated. In addition, Condensate Pump Motor winding temperature for early and late July 2003, including corrections for GE motor, have been included per TE 2004-025 (Ref 7).

Smeaton (Ref 1, Section 14) indicates that bearing temperature rise for an open Class B motor is expected to be one quarter to one half of the 900 C (1620 F) maximum rise for the winding, i.e. 22 to 450 C (40 to 810 F) above the ambient-air temperature.

May 18, 2004 Report Body Page 7 of 17 Total No. of Pages 49 The results of data review are summarized below:

Location Highest Att B 0 C EPU O C Remarks Ambient (Room Avg.)

44.9 50.3 Westinghouse Motor Winding Thrust Bearing Guide Bearing GE Motor Winding Thrust Bearing Guide Bearing 120.0 (Note la) 78.7 72.6 100.0 (Note Ia) 71.6 88.9 125.0 (Note Ia

& lb) 83.7 (Note 2) 77.6 (Note 2) 105.0 (Note la

& lb) 76.6 (Note 2) 93.9 (Note 2)

Class B insulation system rated up to 1300 C (Note 4) 950 C (Note 3) 950 C (Note 3)

Class B insulation system rated up to 1300 C (Note 5) 950 C (Note 3) 950 C (Note 3)

Note la Winding temperature'adjusted for 100 C hot spot allowance Note lb Winding temperature adjusted for approximate 50 C ambient increase at EPU Note 2 Bearing temperature adjusted for approximate 50 C ambient increase at EPU Note 3 Expected bearing temperature (ambient 500 C plus 450 C) per Reference 1, Section 14 Note 4 Refer to the discussion below on Westinghouse analysis conclusions.

Note 5 The GE motor has Class F insulation system rated up to 1650 C General Electric Nuclear Energy was requested to evaluate operation of its motor at 1600HP in a 500 C summer and 400 C remainder of year ambient in accordance with Vermont Yankee's Technical Evaluation No. 2004-025 (Ref 7).

General Electric Nuclear Energy concluded in its evaluation (Ref 12) that the motor has "approximately 30 years of remaining life with normal reliability, at loads of up to 1575HP, with maximum cooling air temperature of 500 C during the three summer months and 400 C for the remainder of the year, with conditions" outlined in Section 5.0

May 18, 2004 Report Body Page 8 of 17 Total No. of Pages 49 of its report. General Electric's evaluation includes analysis of the insulation system, thermal aging, and effects on rotor assembly, mechanical components including bearing design temperature of 2000 F (93.3° C), and other electrical components under increased load.

General Electric Nuclear Energy concludes that no additional maintenance is necessary resulting from the increased load rating.

The predicted at EPU Guide Bearing temperature exceeds the design temperature recommended by GE (Ref 12). GE has indicated that operation up to 2050 F (96.10 C) for a short period of time (one month) is acceptable, after which the lubricating oil would have to be replaced.

Westinghouse was requested to evaluate operation of its motors at 1600HP in a 500 C summer and 40° C remainder of year ambient (Ref 19).

Westinghouse concluded in its evaluation (Ref 11) that there is sufficient electrical and mechanical design margin to allow operation of the existing motors at 1600 HP in a 50° C ambient. Westinghouse's evaluation includes analysis of insulation class, temperature rise, starting characteristics, bearing loading, motor lead cable, speed vs. torque, thermal limits and starting duty limits.

Note:.

Westinghouse will provide a new nameplate: 1600HP, 1.0 SF, 500 C Ambient.

Westinghouse concludes that operating the motor at the higher load will not necessitate a change in frequency or maintenance procedures that have already been established.

The predicted EPU Thrust Bearing temperature exceeds the expected running temperatures recommended by Westinghouse (Ref 11) for mineral-oil-lubricated bearings. The lubricant used at VY is Mobil DTE heavy mineral oil with a continuous operating temperature limit of 2100 F (98.90 C). The existing 1750 F (79.40 C) Thrust Bearing temperature alarms should be changed to be consistent with expected operating conditions and maintain margin to lubricant temperature limit.

3.1.3 Cables, Instruments, Fan Motors, Miscellaneous A walk down of the Condensate Pump room was conducted to identify potentially temperature sensitive components, i.e. cable, instruments, fan motors, etc. Attachment D documents the results this walk down.

May 18,2004 Report Body Page 9 of 17 Total No. of Pages 49 Cables The Condensate Pump feeder cables, 3 1/C 4/0 AWG, 850 C conductor temperature (Ref

22) identified on Attachment D have adequate margin at uprate. The cables are installed in conduit, three conductors in conduit.

Per Reference 14, the ampacity of the three single conductor 4/0 cable in conduit is 274 A. This ampacity figure in turn, per Reference 14, must be corrected for conduit configuration and EPU ambient. This is accomplished by multiplication by a group correction factor and the EPU ambient (500 C) correction factor. For conservatism, the conduit grouping is assumed to be arranged six horizontal conduits with one quarter conduit diameter spacing.

4/0 Ampacity = 274 A x 0.89 (50° C Ambient Temp Correction Factor) x 0.86 (Group Correction Factor) = 209 A Per Reference 3, the Westinghouse Condensate Pump motor nameplate ampacity is 185 A. Per Reference 11, the ampacity increases to 197 A at 1600HP. This is within the available cable ampacity. Note: Per Reference 8, at EPU requirement is 1508 HP (100.5%; normal operation) and 1526 HP (101.7%; off normal loss of one pump).

Per Reference 4, the GE Condensate Pump motor nameplate ampacity is 195 A. Per Reference 12, the ampacity increases to 205 A at 1575HP (5% increase in torque). This is within the available cable ampacity. Note: Per Reference 8, at EPU requirement is 1508 HP (100.5%; normal operation) and 1526 HP (101.7%; off normal loss of one pump).

The low voltage power cables (Ref Attachment D) existing within the Condensate Pump Room are assumed operating below their thermal limit. Typically voltage drop is the limiting factor when sizing power cable due to long runs back to the distribution equipment and cable ampacity is a secondary consideration. VY low voltage power cables similarly sized have been demonstrated to be adequate (Ref 23).

Periods of operation in a 500 C ambient could decrease the expected life; however, the decrease in expected life due to summer time room ambient temperature excursions up to 50° C can be offset by operation in a 40° C or below ambient temperatures for the remainder of the year.

Life reduction due to uprate ambient increase of control and instrumentation cables (Ref Attachment D) existing within the Condensate Pump Room is considered to be small.

These cables are typically operated in electrical circuits with low current well below the insulation thermal limit. VY control cables similarly sized have been demonstrated to be adequate (Ref 24).

May 18,2004 Report Body Page 10 of 17 Total No. of Pages 49 Periods of operation in a 500 C ambient could decrease the expected life; however, the decrease in expected life due to summer time room ambient temperature excursions up to 50° C can be offset by operation in a 400 C or below ambient temperatures for the remainder of the year.

Instruments Per Reference 17, the various Allen Bradley (Ref Attachment D) pressure switches were determined to have an ambient rating of 550 C.

In the absence of vendor data, the Condensate Hotwell Sampling Points (Ref Attachment D) have been assumed to have an ambient temperature capability of 400 C. Operation of the hotwell sampling in an ambient below 40° C will increase the expected life. Periods of operation in a 500 C ambient could decrease the expected life: however, the decrease in expected life due to summer time room ambient temperature excursions up to 500 C are offset by the increase in expected life due to 400 C or below ambient temperatures for the remainder of the year.

Motors Per Reference 16, the 10 HP Dayton Turbine Recirculation Unit (TRU5) (Ref Attachment D) was determined to have an ambient rating of 400.

Operation of recirculation unit in an ambient below 400 C will increase the expected life.

Periods of operation in a 500 C ambient could decrease the expected life: however, the decrease in expected life due to summer time room ambient temperature excursions up to 500 C are offset by the increase in expected life due to 400 C or below ambient temperatures for the remainder of the year.

Miscellaneous Per Reference 20, the various NAMCO limit switches (Ref Attachment D) were determined to have an ambient rating of 900 C.

In the absence of vendor data, switches and lighting fixtures (Ref Attachment D) have been assumed to have an ambient temperature capability of 400 C.

Operation of switches and lighting fixtures in an ambient below 40° C will increase the expected life. Periods of operation in a 500 C ambient could decrease the expected life:

however, the decrease in expected life due to summer time room ambient temperature excursions up to 500 C are offset by the increase in expected life due to 400 C or below ambient temperatures for the remainder of the year.

May 18,2004 Report Body Page 11 of 17 Total No. of Pages 49 3.1.4 Motor Protection The protection curve for the Condensate Pump Motor (Ref 21) bounds the new EPU operating condition ampacity for both the Westinghouse and GE motors. A CCN or revision to Reference 21 should be issued to revise page B-6 to document the new operating conditions:

1. Both the Westinghouse and the GE analyses indicate new full load current for the Condensate Pump motors

2. Westinghouse will provide a new 1600HP nameplate for its Condensate Pump motors 3.2 Feedwater Pump and Pump Room 3.2.1 Room Ambient Calculation VYC-2279 (Ref 10) establishes the Current Licensing Thermal Power (CLTP) and EPU Feedwater Pump Room ambient temperature:

Area Temperature

° F 0 C CLTP 105 40.6 EPU 112.6 44.8 Based on design EPU 112.6 44.8 Based on empirical data These temperatures are conservatively calculated bounding maximum temperatures.

Actual EPU maximum temperatures are anticipated to be lower than these calculated bounding values.

3.2.2 Feedwater Pump Motor The Reactor Feedwater Pump Motor has the following characteristics: 5500HP, 1.15 SF, 4000V, 600 C rise, Class B insulation, Open Drip-Proof, 400 C Ambient (Ref 2 & 5).

Attachment A summarizes VY plant operating temperature data (Ref 6) for the Feedwater Pump Motor/Room. Data presented is highest temperature recorded per location during the several days of data collection. The highest and average temperature is calculated.

Smeaton (Ref 1, Section 14) indicates that bearing temperature rise for an open Class B motor is expected to be one quarter to one half of the 900 C (1620 F) maximum rise for the winding, i.e. 22 to 450 C (40 to 81° F) above the ambient-air temperature.

May 18, 2004 Report Body Page 12 of 17 Total No. of Pages 49 The results of data review are summarized below:

Location Highest Att A At EPU Remarks oC

°C Ambient (Room Avg.)

35.0 44.8 Winding 93.4 (Note la) 103.4 Class B insulation system (Note la rated up to 1300 C

& lb)

Inboard Bearing 76.0 86.0 900 C (Note 3)

(Note 2)

Outboard Bearing 80.2 90.2 900 C (Note 3)

(Note 2)

Thrust Bearing 61.3 71.3 90° C (Note 3)

(Note 2)

Motor Inboard Bearing 70.9 80.9 90° C (Note 3)

(Note 2)

Motor Outboard Bearing 82.9 92.9 90° C (Note 3)

(Note 2)

Note la Winding temperature adjusted for 100 C hot spot allowance Note lb Winding temperature adjusted for approximate 50 C ambient increase at EPU Note 2 Bearing temperature adjusted for approximate 100 C ambient increase at EPU Note 3 Expected bearing temperature (ambient 450 C plus 450 C) per Reference 1, Section 14 The predicted EPU winding temperature, including 100 C increase in ambient and a 100 C hot spot allowance, is 103.40 C. This temperature is well within the allowable 1300 C temperature for a Class B insulation system.

The predicted EPU bearing temperatures approximate the Smeaton expectations.

The predicted EPU pump Inboard and Outboard and motor Outboard Bearing temperatures exceed the expected running and alarm temperatures recommended by Westinghouse (Ref 11) for mineral-oil-lubricated bearings. The lubricant used at VY is Mobil DTE heavy mineral oil with a continuous operating temperature limit of 2100 F (98.90 C). The existing 1800 F (82.20 C) pump Inboard and Outboard and motor Outboard Bearing temperature alarms should be changed to be consistent with expected operating conditions and maintain margin to lubricant temperature limit.

May 18, 2004 Report Body Page 13 of 17 Total No. of Pages 49 3.2.3 Cables, Instruments, Fan Motors, Miscellaneous A walk down of the Feedwater Pump room was conducted to identify potentially temperature sensitive components, i.e. cable, instruments, fan motors, etc. Attachment C documents the results this walk down.

Cables The Feedwater Pump feeder cables, 3 1/C 750 MCM, 850 C conductor temperature (Ref

22) identified on Attachment C have adequate margin at uprate. The cables are installed in conduit, three conductors in each conduit.

Per Reference 14, the ampacity of the three single conductor 750 MCM cable in conduit is 551 A This ampacity figure in turn, per Reference 14, must be corrected for conduit configuration and EPU ambient. This is accomplished by multiplication by a group correction factor and the EPU ambient (500 C) correction factor. For conservatism, the conduit grouping is assumed to be arranged six horizontal conduits with one quarter conduit spacing.

750 MCM Ampacity = 551 A x 0.89 (50 C Ambient Temp Correction) x 0.86 (Group Correction Factor) = 421 A. Since 2 conductor per phase are used, the total ampacity available to each motor is 421 x 2 = 842 A.

Per Reference 2, the Westinghouse Feedwater Pump motor nameplate ampacity is 666 A.

This is well within the available cable ampacity.

The low voltage power cables (Ref Attachment C) existing within the Feedwater Pump Room are assumed operating below their thermal limit. Typically, voltage drop is the limiting factor when sizing power cable due to long runs back to the distribution equipment and cable ampacity is a secondary consideration. VY low voltage power cables similarly sized have been demonstrated to be adequate (Ref 23).

Periods of operation in a 450 C ambient could decrease the expected life; however, the decrease in expected life due to summer time room ambient temperature excursions up to 450 C can be offset by operation in a 400 C or below ambient temperatures for the remainder of the year.

Life reduction due to uprate ambient increase of control and instrumentation cables (Ref Attachment C) existing within the Feedwater Pump Room is considered to be small.

These cables are typically operated in electrical circuits with low current well below the insulation thermal limit. VY control cables similarly sized have been demonstrated to be adequate (Ref 24).

Periods of operation in a 450 C ambient could decrease the expected life; however, the decrease in expected life due to summer time room ambient temperature excursions up to D

May 18, 2004 Report Body Page 14 of 17 Total No. of Pages 49 450 C can be offset by operation in a 400 C or below ambient temperatures for the remainder of the year.

Instruments Per Reference 18, the various GE pressure transmitters (RFP Suction Flow, FT-102-2A, -

2B, -2C) and heater transmitters (ESS to 3P( and 4h Pt Htrs A&B, PT-101-17A, -19A, -

19B; REFP Suction Header Press, PT-102-24; RFP Discharge Header Press, PT-102-26; and Feedwater Header Press, PT-102-27) (Ref Attachment C) used in the Feedwater Pump room were determined to have an ambient rating of 1620 C or 1850 C.

Per Reference 18, the Foxboro heater transmitter (ESS to 3rd Pt Htr B, PT-101-17B) (Ref Attachment C) was determined to have an ambient rating of 1850 C.

Per Reference 17, the various Allen Bradley pressure switches (Ref Attachment C) were determined to have an ambient rating of 55° C.

Motors Per Reference 16, the 10 HP Dayton Turbine Recirculation Units (TRUI, TRU2, TRU3, TRU4) (Ref Attachment C) were determined to have an ambient rating of 400 C.

Operation of recirculation unit in an ambient below 40° C will increase the expected life.

Periods of operation in a 450 C ambient could decrease the expected life: however, the decrease in expected life due to summer time room ambient temperature excursions up to 450 C are offset by the increase in expected life due to 400 C or below ambient temperatures for the remainder of the year.

Spring Operated Valves Per Reference 18, the Babcock & Wilcox spring operated valves (Feedwater Pump Recirc Valves, FCV-102-2A, -2B, -2C; Main Feed Reg Valves, FCV-6-12A, -12B; Start Up Feed Reg Valve, FCV-6-13) (Ref Attachment C) used in the Feedwater Pump room were determined to have an ambient rating of 204° C. The Digital Valve Actuators associated with FCV-6-12A & -12B were determined to have an ambient rating of 80° C (Refer to Attachment C).

Motor Operated Valves Per Reference 15, the Limitorque MOV's (RFP Discharge Valves, V634A, -4B, 4C; Feedwater Aux Regulator Inlet Valves, V63-10 & -1 IA) (Ref Attachment C) used in the Feedwater Pump room were determined to have an ambient rating of 600 C.

May 18, 2004 Report Body Page 15 of 17 Total No. of Pages 49 Miscellaneous In the absence of vendor data, the FWP/CP Flow Instrument Rack and lighting fixtures have been assumed to have an ambient temperature capability of 40 C.

Operation of the instrument rack and lighting fixtures in an ambient below 400 C will increase the expected life. Periods of operation in a 450 C ambient could decrease the expected life: however, the decrease in expected life due to summer time room ambient temperature excursions up to 450 C are offset by the increase in expected life due to 40° C or below ambient temperatures for the remainder of the year.

4 References

1.

"Motor Application and Maintenance Handbook", Robert W Smeaton, Editor, Copyright 1969 by McGraw-Hill, Inc.

2.

5920-1602, R3, 7/25/69, "Reactor Feed Pump Motor Outline" (Westinghouse)

3.

5920-836, RO, 11/25/68, "Condensate Pump Motor Outline" (Westinghouse)

4.

5920-11947, RO, 7/28/97, "Repl. Condensate Pump Motor" (Outline) (GE Motors)"

5.

VYNP-IV-M-2, R3, October 14, 1969, "Specification EBASCO 8-53 Motors for Station Auxiliary Service"

6.

VY Engineering Correspondence, ERC No. 2003-053, 8/20/03, "Plant Operating Data Supporting VYC-2279"

7.

Technical Evaluation No. 2004-025, "Input to WIN-012 DIR, Rev. 0, Condensate Pump Motor Evaluation"

8.

BOP Engineering Report, ERC Section 3.4.3, RO, 5/18/04 "Condensate and Feedwater"

9.

Vermont Yankee EPU Engineering Report, April 2,2004, "Power Dependent Heating, Ventilation, and Air Conditioning (HVAC)"

10.

Calculation VYC-2279, R 0, 8/26103, "Evaluation of EPU Impact on Ambient Space Temperatures During Normal Operation"

11. Westinghouse Engineering Study Number ES00166 "Determine If Motor Shop Order 76P0948 Can be Re-rated From 1500 HP to 1600 HP With No Physical

May 18, 2004 Report Body Page 16 of 17 Total No. of Pages 49 Changes": Report dated 4/19/04, revised 5/4/04, and Data Pack dated 4/19/04.

Westinghouse Oil Lubrication Guideline, undated. All included as Attachment F.

12.

General Electric letter DRF 0000-0027-1611, May 13, 2004, Condensate Pump Motor Increased Load Evaluation-GE Motor Model 5KV84483656501. Included as Attachment E.

13.

Scope Change Notice-040, Rev. 1, 3/1/04, "Condensate and Feedwater Pump/Room Evaluation for EPU"

14.

AIEE-IPCEA Power Cable Ampacities Copper Conductors, 1962.

15.

Calculation VYC-2166, "Evaluation of Motor Performance Parameters for MOV-63-l hA Motor IYF50007A3QY", Att. B Page 16 of 47

16.

EE-1600, AC Motor for Turbine Building Air Handling / Air Recirculation Unit, Rev. 1, 4/28/03.

17.

Allen Bradley Bulletin 800T, Rev. 1

18.

EMPAC (Enterprise Maintenance Planning and Control) Asset

19.

Stone & Webster, Inc Scope of Work letter VY 2004-0145 dared 2/2/2004 part of Subcontract No. 59029-A003.

20.

5920-11981 Rev 0, 7/10/98, NAMCO Controls limit switch drawing.

21.

Calculation VYC-1087, Rev 1, "4160VAC and 480VAC Relay and Breaker Coordination.

22. /VYNP-IV-C-2A, R2, October 11, 1969, "EBASCO Services Incorporated Specification EBASCO CX-68 Electric Cables 5KV Power Cable Normal Service"

23.

Calculation VYC-1854, "Determination of Ampacity for Safety Related Power Cables for the Auxiliary Power Distribution System".

24.

Calculation VYC-1314 Rev 3, "Determination of Minimum Pickup Voltage for SCE 480V MCC Control Circuit Devices During Normal Operational Transient Conditions" 5

Attachments Attachment A Feedwater Pump Room Temperature Analysis Attachment B Condensate Pump Room Temperature Analysis

May 18, 2004 Report Body Page 17 of 17 Total No. of Pages 49 Attachment C Attachment D Attachment E Attachment F Feedwater Pump Cable/InstrumentfMisc. Analysis Condensate Pump CablefInstrumentfMisc. Analysis GE Nuclear Energy Motor Evaluation Westinghouse Motor Company Engineering Study

Attachnrrt A FeedWater PP Room 62603 630 7/1/03 712/3 7/3.0 7/9/03 7t141

/lY011 3

7VIM 7/2103 7Q403 7/28,03 F

F F

F F

F F

F F

F F

F Kvhest Tentv F

C Avg Town F

C OUTSIDE AIR TFIMP RX rEED PLJMP A MOTOR WINDING 95.5 82.3 84 9 87.3 85 8 69 2 80 5 86 9 80 5 75 2 83 4 el 9 I

77.9 77.7 78.1 78 r

7 i

78.1 78.5 78 1 IRX iEtD PUIMP B MOIOR.._..

IWINDI.NG 34.2 33.9 33.8 33.9 34.2 34 2 34.0 340 RX ILLDIVUMPC M0OIR WINDING 82.8 82.4 83.2 83.4 83.4 83.4 83.0 830 RX FEED PLMIP A IBOARD BEARING 168 6 t68 6 168 8 168.7 168 8 78.0 168 7 75.9 RX FEED PUMP A OUTBOARD BEARING 1695 1696 169.9 1702 1702 768 1698 766 RX FEED PUMP A THRST BRGEPLATE 1358 1355 135.7 1359 1359 57.7 135.7 576 RX FEED PUMP A MOTOR INBOARDBRG 146.9 1467 1468 147.3 147.3 64.1 146.9 638 RX FEED PUMP A MOTOR OUTBO BRG 1806 1806 181 2 181 181.2 82 9 180 9 82 7 RX FEED PUMP B INBOARD BEARING 1149 1155 1158 1159 115.9 466 1155 464 RX FEED PUMP B OUTBOARD BEARING 122.9 1227 122.9 122.9 122.9 505 1229 50.5 RX FEED PUMP B THRST BRG E PLATE 87.7 87.5 87.8 87.5 87.8 31 0 87.6 309 RX PEED PUMP B MOTOR INBOARD BRG 892 89 898 95 89 6 32 0 89.3 31.8 RX FEED PUMP B MOTOR OUTRDBRG 90 89 5 90 89 9 90 322 899 32 1 RX FEED PUMP C INBOARDBEARING 1644 164 164.1 164 1644 736 164.1 734 RX FEED PUNIP C OtTBOARDBEARMG 176 175.9 1764 1764 176.4 802 1762 80.1 RX FEED PUMbPC TIRST BRGEPLATE 1422 142.1 1422 142.3 1423 61.3 1422 61.2 RXFFY.DPUMPCNMOTOR INBOARDBRG 1595 1593 1595 1596 1596 70.9 1595 708 RX F.ED PtMPC MOTOR OUTRDBRG 1562 156 1564 1566 1566 692 156.3 69.1 RuoouBulkAirTemppl 935 95.7 96.7 966 984 99 982 984 95.8 947 954 96.3 99 37.2 966 359 RnomBulkAirTemp2 91 945 95.8 95.8 98 97.1 946 955 934 929 943 938 97.1 36.2 94.6 348 Room BulkAirTemp3 90.1 936 92.4 93.1 93.9 95.7 92.1 938 91.5 90.8 9Z1 92.3 957 354 926 33.7 RoonBulkAirTemp 4 92.2 935 95.1 954 95.5 962 936 962 92.3 922 93.7 93.8 962 35.7 941 34.5 Room Bulk Air Temp 5 995 101.2 1007 986 101.2 38.4 1000 37.8 Room Bulk Air Temp 6 963 96 954 96.6 966 35.9 96.1 35.6 Room Bulk Air Temp 7 946 944 937 95.2 952 35.1 945 34.7 Room Bulk AirTemp 8 925 91 922 92.2 925 336 920 333 Room Bulk AirTemp 9 92.7 92.6 931 92.7 931 339 92.8 338 Room Bulk Air Temp 10 91.3 94 936 924 94 344 92.8 338 Room Bulk AirTemp II 946 938 95.6 952 956 35.3 948 349 Room Bulk AirTemp I.

92 8 96 98 97.3 98 36.7 96.0 356 Room Bulk AirTemp 13 98.5 98 97.8 99 99 37.2 983 368 101.2 38e4 95.0 35.0 Room BulkAirAsuT-np 91.7 943 950 952 960 970 946 960 94.3 944 950 950 97 361 949 349 lBold DegsC

Attachment B Condensate PP Room 6/26/03 6/30103 7/11/03 7/2103 7/3/03 7/9/03 7/14103 7/15/03 7/16/03 7/18/03 7/24103 7/28/03 F

F F

F F

F F

F F

F F

F Highest Temp F

C Avg Temp F

C OUTSIDE AIR TEMP CONDENSATE PUMP A MOTOR WINDING From TE 2004-025 95.5 82.3 84.9 87.3 85.8 69.2 80.5 86.9 80.5 75.2 83.4 81.9 106 105.6 106 105.7 106.0 106 106 106 106 110.0 I

110 1101 108.0 110.0 105.8 107.3 105.8 107.3 CONDENSATE PUMP B MOTOR WINDING 53.4 53.1 53.4 52.6 53.4 53.4 53.1 53.1 From TE 2004-025 r

90 87.5 87.5 87.5 87.5 i

90.0 90.0 88.3 88.3 COND LSAIE PUMPJ C MOTOR WINDING 100.7 100.9 100.2 100 100.9 100.9 100.5 100.5 r~om TE 200.1025 105 105 101 101 101 101 105.0 105.0 102.3 102.3 CONDENSATE PUMP A MTR THRUST BRG 173.6 173.2 173.3 173.3 173.6 78.7 173.4 78.5 CONDENSATE PUMP A MTR GUIDE BRG 162.2 161.7 162.5 162.6 162.6 72.6 162.3 72.4-CONDENSATE PUMP B NtTRTIIRUSTBRG 160.8 160.7 160.9 160.7 160.9 71.6 160.8 71.5 CONDENSATE PUMP B MTRGUIDEBRG 192.1 191.9 192 191.7 192.1 889 191.9 88.8 CONDENSATE PUMP C MTRTllRUSTBRG 169.4 169 169.3 169.3 169.4 76.3 169.3 76.3 CONDENSATE PUMP C MTR GUIDE lRG 147.4 147 147.3 147.3 147.4 64.1 147.3 64.0 RoomBulkAirTempl 105.3 106.9 110.3 108.3 108.8 105.8 104.2 106.9 103 105.5 103.6 105.1 110.3 43.5 106.1 41.2 RoomBulkAirTcmp2 111.5 110.3 112.5 t14.5 116.5 116.4 107.1 109 112.5 115.8 110 111.4 116.5 46.9 112.3 44.6 Room BulkAirTemp3 105.8 111.3 111.2 108.8 Ill 110.9 107.8 1088 106.8 109.3 106 106.7 111.3 44.1 108.7 42.6 Room BulkAirTemp4 108.3 109.9 114.4 116.3 115 113.5 114.8 113 114.3 115.1 111.4 115.1 116.3 46.8 113.4 45.2 Room Bulk AirTemp 5 112.3 114.6 115.8 114.3 115.8 46.6 114.3 45.7 Room Bulk Air Temp 6 116.5 113.3 117.6 1182 118.2 47.9 116.4 46.9 Room Bulk AirTemp 7 115.7 113.8 117.1 115.2 117.1 47.3 115.5 46.4 Room Bulk Air Temp 8 118.3 121.3 126 121.8 126.0 52.2 121.9 49.9 Room Bulk Air Temp 9 113 108.5 115.5 115.5 46.4 112.3 44.6 RoomBulkAirTemp 10 118.7 117.1 114.3 119 119.0 48.3 117.3 47.4 Room Bulk Air Temp II 102.4 106 103.1 103.2 106.0 41.1 103.7 39.8 Room Bulk Air Temp 12 Room Bulk Air Temp I1 1260 52.2 112.9 44.9 Room Bulk Air Ave Temp 107.7 109.6 112.1 112.0 112.8 111.7 1108.5 109.4 112.1 113.2 112.1 113.2 113.2 45.1 111.2 4.0 I Bold DegsC

Attachment C FWP Area Ambient Acceptable Equipment Description Source Document Temp Yes/No Notes TRUl Dayton Turbine Recirc Unit G-191303 Sheet 1 & G-191304 40 C Yes Reference 16, Note 2 Sheet 1, EE-1600 TRU2 Dayton Turbine Recirc Unit G-191303 Sheet 1 & 0-191304 40 C Yes Reference 16, Note 2 Sheet 1, EE-1600 TRU3 Dayton Turbine Recirc Unit G-191303 Sheet 1 & G-191304 40 C Yes Reference 16, Note 2 Sheet 1, EE-1600 TRU4 Dayton Turbine Recirc Unit G-191303 Sheet 1 & G-191304 40 C Yes Reference 16, Note 2 Sheet 1, EE-1600 V63-4A RFP Discharge Valves G-191303 Sheet 1, & G-191304 60 C Yes Reference 15 Sheet 1, VYC-2166 Att. B Page 16 of 47 V63-4B RFP Discharge Valves G-191303 Sheet 1, & G-191304 60 C Yes Reference 15 Sheet 1, VYC-2166 Att. B Page 16 of 47 V63-4C RFP Discharge Valves G-191303 Sheet 1, & G-191304 60 C Yes Reference 15 Sheet 1, VYC-2166 Ant. B Page 16 of 47 V63-10 FeedwaterAux. Regulator Inlet G-191303 Sheet 1, & G-191304 60 0 Yes Reference 15 Valve Sheet 1, VYC-2166 Att. B Page 16 of 47 V63-1 1 A Feedwater Aux. Regulator Inlet G-191303 Sheet 1, & G-191304 60 C Yes Reference 15 Valve Sheet 1, VYC-2166 Att. B Page 16 of 47 FT-102-2A Reactor FDW Pump Suction Flow GE Diff. Pressure Transmitter 162 C Yes Reference 18 Model GE-50-555 FT-102-2B Reactor FDW Pump Suction Flow GE Diff. Pressure Transmitter 162 C Yes Reference 18 Model GE-50-555 FT-1 02-20 Reactor FDW Pump Suction Flow GE Diff. Pressure Transmitter 162 C Yes Reference 18 Model GE-50-555 PT-101-17A GE HeaterTransmitter (ESS to 3rd Model GE-50-551032 185 C Yes Reference 18 Pt Htr A)

PT-101-17B Foxboro Heater Transmitter (ESS Model N-821 -GM-H51 SM2 185 C Yes Reference 18 to 3rd Pt Htr B)

Attachment C FWP Area Ambient Acceptable EquipmentDescription Source Document Temp Yes/No Notes PT-101-19A Heater Transmitters (ESS to 4th Pt Model GE-50-552032 185 C Yes Reference 18 Htr A)

PT-101-19B Heater Transmitters (ESS to 4th Pt Model GE.50-552032 185 C Yes Reference 18 Htr B)

PT-102-24 Heater Transmitter (RFP Suction Model GE-50-551032 162 C Yes Reference 18 Header Press)

PT-102-26 Heater Transmitters (RFP Model GE-50-551032 162 C Yes Reference 18 Discharge Header Press)

PT-102-27 Heater Transmitters (Feedwater Model GE-50-551032 162 C Yes Reference 18 Header Press)

FCV-102-2A Spring Operated Valves w/alve Babcock & Wilcox Model 204 C Yes Reference 18 Actuators (Feedwater Pump A 730114044 lRecirc Valve)

FCV-102-2B Spring Operated Valves w/alve Babcock & Wilcox Model 204 C Yes Reference 18 Actuators (Feedwater Pump B 730114044 Recirc Valve)

FCV-102-2C Spring Operated Valves w/alve Babcock & Wilcox Model 204 C Yes Reference 18 Actuators (Feedwater Pump C 730114044 Recirc Valve)

FCV-6-12A Spring Operated Valves w/Digital Babcock & Wilcox Model 204 0 / 80 Yes Reference 18 / Note 3 Valve Actuators (Main Feed Reg 730114044/Siemens Model C

Valve)

SIPART PS2 FCV-6-12B Spring Operated Valves w/Digital Babcock & Wilcox Model 204 C / 80 Yes Reference 18 / Note 3 Valve Actuators (Main Feed Reg 730114044/Siemens Model C

Valve)

SIPART PS2 FCV-6-13 Spring Operated Valves w/alve Babcock & Wilcox Model 204 C Yes Reference 18 Actuators (Start Up Feed Reg 730114044 Valve) 9x Pressure Switches Allen Bradley Model 836T, Allen 55 C Yes Reference 17 Bradley 800 T Bulletin n/a Feedwater & Condensate Instrument Rack Yes Note 1, Note 2 Instrument Rack n/a 12x Lighting Fixtures I

IYes Note 1, Note 2

Attachment C FWP Area Ambient Acceptable Equipment Description Source Document Temp Yes/No Notes R201 low voltage power cable in tray Yes Note 2 R202 low voltage power cable in tray Yes Note 2 R203-BB low voltage power cable in tray Yes Note 2 R301 low voltage control cable in tray Yes Note 2 R301 -BB low voltage control cable in tray Yes Note 2 R302 low voltage control cable in tray Yes Note 2 R402 low voltage instr. cable in tray Yes Note 2 R403 low voltage instr. cable in tray Yes Note 2 1502H 1-3/C #16 C&CL B191301 Sh. 502 Yes Note 2 1502F 1-5/C #16 C&CL B191301 Sh. 502 Yes Note 2 1502G 1-2/C #16 C&CL B191301 Sh. 502 Yes Note 2 1502L 1-2PR TW/SH #16 XLPE C&CL B191301 Sh. 502 Yes Note 2 1502M 1-2PR TW/SH #16 XLPE C&CL B191301 Sh. 502 Yes Note 2 1502D 1-5/C #16 C&CL B191301 Sh. 502 Yes Note 2 1502E 1-21C #16 C&CL B191301 Sh. 502 Yes Note 2 1502J 1-3/C #16 C&CL B191301 Sh. 502 Yes Note 2 1550A 3-1/C 750 MOM C&CL B191301 Sh. 550 40C Yes P-1-1A Feeder; Note 2 1550B 3-1/C 750 MCM C&CL B191301 Sh. 550 40 C Yes P-1-1A Feeder; Note 2 1551 A 3-1/C 750 MCM C&CL B191301 Sh. 551 40C Yes P-1 -1 B Feeder; Note 2 1551B 3-1/C 750 MCM C&CL B191301 Sh. 551 40 C Yes P-1-1B Feeder; Note 2 1552A 3-1/C 750 MCM C&CL B191301 Sh. 552 40C Yes P-1 -1 C Feeder; Note 2 1552B 3-1/C 750 MOM C&CL B191301 Sh. 552 40 C Yes P-1-1C Feeder; Note 2 Note 1: In the absence of vendor data, these components have been assumed to have an ambient temperature of 40 C.

Note 2: Refer to analysis provided within technical report.

Note 3: Seimens Catalog F1 01 November 2003, Electopnuematic Positioner / SIPART PS 2

Attachment D Condensate Pump Area Acceptable Equipment Description Source Document Ambient Yes/No Notes TRU5 Dayton Turbine Recirc Unit G-191303 Sheet 1 & G-191304 40 C Yes Reference 16, Note 2 Sheet 1, EE-1600 21-22 Condensate Hotwell Sampling Instrumentation 40 C Yes Note 1, Note 2 Point 23-24 Condensate Hotwell Sampling Instrumentation 40 C Yes Note 1, Note 2

_ _ _ _ _ P o in t n/a 7x Lighting Fixtures 40 C Yes Note 1, Note 2 n/a 3x Pressure Switches Allen Bradley Model 836T, Allen 55 C Yes Reference 17 Bradley 800 T Bulletin n/a 3x Condensate Pump Switches 40 C Yes Note 1. Note 2 n/a 3x Valve Postion Limit Switches 5920-11981 90 C Yes Reference 20 R201 low voltage power cable in tray Yes Note 2 R203-BB low voltage power cable in tray Yes Note 2 R301 low voltage control cable in tray Yes Note 2 R301-BB low voltage control cable in tray Yes Note 2 R302 low voltage control cable in tray Yes Note 2 R402 low voltage instr. cable in tray Yes Note 2 R403-BB low voltage instr. cable in tray Yes Note 2 R403-CC low voltage instr. cable in tray Yes Note 2 1530A 3-1/C 4/0 C&CL B-1 91301 Sh. 530 40 C Yes P2-1A Feeder, Note 2 1531A 3-1/C 4/0 C&CL B-191301 Sh. 531 40 C Yes P2-1B Feeder, Note 2 1532A 3-1 /C 4/0 C&CL B-191301 Sh. 532 40 C Yes P2-1 C Feeder, Note 2 Note 1: In the absence of vendor data, these components have been assumed to have an ambient temperature of 40 C.

Note 2: Refer to analysis provided within technical report.

T mathI o F GE Nuclear Energy General Electric Company 175 CurtnerAvenue, MC 733, San Jose, CA 95125 DRF 0000-0027-1611 May 13, 2004 Craig Nicholes Vermont Yankee Energy Nuclear Northeast

SUBJECT:

Condensate Pump Motor Increased Load Evaluation GE Motor Model 5KV84483656501

REFERENCE:

1. Entergy Nuclear Work Impact Notice (WIN) 012, dated 3/17/04

2. VY supplied data, DIR WIN 012, Rev. 0, Rev I and Rev 2, Evaluation No.

2004-025 and 2004-029 This letter report provides the results of an evaluation to determine the effect on the life and reliability of increasing the load on the GE Condensate Pump Motor (CPM) at Vermont Yankee (VY). The increased load is the result of changes to the system hydraulic resistance that results in the pump operating at a higher flow to meet plant power uprate conditions. The uprated operating load is estimated to be less than 5% greater than the existing nameplate rated value of 1500 HP (195 amps). The Evaluation was performed for an uprated load of 1575 HP in accordance with the Reference 1 purchase order using plant data from the Reference 2 DIR.

1.0

SUMMARY

• The evaluation concluded that the Condensate Pump Motor has approximately 30 years of remaining life with normal reliability, at loads of up to 1575 HP with maximum cooling air temperature of 50'C during the three summer months and 401C for the remainder of the year, within the constraints listed in the conclusions section of this letter report. After that time, a review of the latest operating data and an assessment of the motor condition should be performed to determine future remaining life and appropriate maintenance actions.

• Based on the existing design margin in the motor and operating history, there is no need to rewind or modify the motor at this time to achieve 30 years or more of life at the maximum increased load and ambient temperature.

• When the motor is initially operated at the increased load, it should be monitored and values compared to acceptance criteria. Monitored parameters should include winding and bearing temperature using installed sensors or thermography, discharge air temperature, vibration,

stator current, noise, and visual inspection. Acceptance criteria provided in revised Data Sheet.

2.0 BACKGROUND

The Condensate Pump Motor brake horsepower is calculated to be approximately 1510 BHP at the power uprate condition. The motor presently operates near the current nameplate full load of 195 amps. The motor is located in a room that experiences ambient temperatures between 401C and 500C during hot summer days, and the room temperature drops to below 40'C in the non-summer days. At uprate, the current draw is expected to be higher, since the horsepower demand is calculated to increase by approximately 100 HP.

The objective of the evaluation was to evaluate acceptability of uprating the motor to a 5%

increase in load above rated, 1575 HP, and operation during the three summer months at 500C and at 40'C for the remainder of the year. The objective of the evaluation was to address the primary effect of the increased load on the motor and not the secondary effects, such as, electrical system protection equipment setpoints, additional heat load to plant HVAC or cooling water systems, power cable voltage drop increase due to higher current, shaft rotordynamics if speed is increased, or effect on equipment other than the motor.

3.0 MOTOR DESCRIPTION 3.1 Design Characteristics (Original Design)

GE Motor Model:

5KV84483656501, serial number 840703 Safety Class:

Non-safety related Application:

Condensate Pump Motor Horsepower:

1500 HP Voltage:

4000 VAC, 3 phase, 60 Hz (to be confirmed by Entergy)

Full Load Current:

195 amps (nameplate rated)

Full Load Speed:

1185 RPM Insulation Class:

NEMA Class F Ambient:

40'C (nameplate rated)

Thrust Load at Coupling:

21,400 lbs (downthrust) 3.2 Operating Characteristics Plant operating data was provided in the referenced DIR that were used as the baseline from which to extrapolate operating current and winding temperature to the increased loads.

The motor was manufactured in 1994, and is conservatively assumed to have been operating since then for approximately 10 years at approximately the same load and cooling air temperature as presently exists. Plant data shows that the motor maximum temperature is 901C, when the ambient temperature is approximately 451C. Winding temperatures were measured by sensors embedded in the winding, which approximate the insulation temperature. Industry

practice is to assume the temperature in some other part of the winding insulation to be 10C greater (hotspot) than the measured temperature. Therefore, the maximum expected insulation temperature is 1000C with the corresponding ambient temperature of 450C under current conditions. Based on this operating data, the temperature rise is 550C. The DIR transmittal identified a typical load of 185 amps-corresponding to this temperature rise.

4.0 EVALUATION

SUMMARY

4.1 Evaluation Method The evaluation summarized in this letter report included the following steps:

• Obtained motor design data from GE archives. Obtained site operating data, such as, motor current, winding temperatures, ambient temperature, bearing temperature and vibration data.

• Determined the expected motor performance characteristics, including current, efficiency, power factor, speed, torque, heat rise and operating temperature at the original rated 1500 HP and increased loads.

Determined the effect of the increased load and operating temperature on the stator assembly, focusing on the long-term thermal aging characteristics and life of the stator winding insulation system.

Determined the effect of the increased load and operating temperature on the rotor assembly, focusing on the reliability of the rotor bars, endrings, retaining rings, and core.

Determined the effect of the increased load torque and stress on the critical mechanical components of the rotor, bearings, lubrication system, and stator core support structure.

• Determined the effect of the increased load on the motor electrical components considering ampacity and magnetic forces on the current carrying components.

• Determined the effect of the increased heat load on the heat transfer capability of the ventilation system and discharge to the room.

Revised documentation will be provided to supplement the original motor rating data in the instruction manuals and any changes in maintenance or lubrication recommendations provided.

• Performed independent verification of above evaluation, documented in accordance with GE Quality Assurance practices.

• Issued draft and final letter reports with the evaluation results, conclusions, and recommendations, for VY review and comment.

The motor performance characteristics of current, efficiency, power factor, slip and losses for a range of loads were included in the original electrical design. The calculated values at 1500 HP differed slightly from nameplate rating values, because the nameplate rating values are

guaranteed minimum or maximum values with margin added relative to the calculated design values for commercial reasons. For example, conservatism was added to the design values to compensate for uncertainty, such as, the efficiency and power factor values were rounded down and current was rounded up. The electrical design values were considered to be the best estimates of the motor performance characteristics. The nameplate values were extrapolated for the uprated load and are an "upper-bound" value. They are tabulated in the report.

The winding losses used in the evaluation were obtained from the original electrical design and the heat transfer effectiveness of the ventilation system was based on the more conservative value obtained from the original motor design data or plant operating data. The operating data shows that the motor is performing better than designed.

The aging mechanism related to the electromechanical forces on the windings, as described in IEEE 434, was evaluated using GE test data of large motors subjected to repetitive starting transients. This testing evaluated the adequacy of the winding mechanical strength relative to electromagnetic loads, and is typically referred to as "plug-reversal" tests. A load versus life relationship was used to estimate the remaining life and was found to be non-limiting for the 5%

overload of the CPM motor.

4.2 Effect Of Increased Load On Insulation System Thermal Life The winding temperature and corresponding remaining years of winding life in terms of horsepower and current was calculated for rated and uprated loads at the maximum cooling air temperature of 500C.

It was found that the original motor design included significant margin such that the aging to-date has consumed less than 10% of the total thermal life. Therefore, increases in loads and winding temperatures are acceptable without reaching end of winding thermal life within the expected future motor operating life of 30 years.

The assessment of the motor focused on the electrical system. Typically, the operating risk associated with the electrical system (stator and rotor) is greater than the mechanical system, because the consequence of failure would require removal and rewinding the stator or rebarring the rotor at a significant cost and schedule impact. Also, the assessment found adequate margin in the mechanical system for increased loads.

The thermal aging portion of the evaluation was based on methods used to determine qualified life of safety-related motors. Aging is caused by the gradual breakdown of chemical bonds in the polymers making up the insulation system. As the material ages it loses its electrical and mechanical capability or "life". Aging is related to the rate of chemical reactions and is approximated by the 10C rule, which says for each 10C of increased temperature, the insulation life is reduced by a factor of 2.

Increases in the motor load affect the motor heat rise by increasing the current and the corresponding 12R losses of the winding. Decreases in voltage also affect the heat rise of the motor by increasing the current but decreasing the losses in the stator and rotor core iron. The original electrical design program calculated the losses due to stator and rotor core iron losses,

12R losses in the stator winding, 12R losses in the rotor winding, windage and friction losses, and stray load losses. These losses were the basis of motor efficiency and temperature rise estimates.

Life test data was obtained from motor material samples, assembled in "motorettes", which were tested to failure under accelerated aging conditions of temperature, humidity, and mechanical loads. The times and temperatures to failure of approximately 10 samples at three different temperatures (30 samples) were used to plot a regression line following the methods of IEEE Std 101-1972, The Guide for Statistical Analysis of Thermal Life Test Data. The data was used to calculate the activation energy for use in the end-of-life estimation.

The Arrhenius Equation describes the temperature dependence on the rate of chemical reactions, and can be adapted to approximate the relationship between insulation life and temperature. For a chemical reaction rate, the Arrhenius equation is given by:

K= A

• exp (-+fRT) where K

= specific reaction rate

= activation energy of the reaction (assumed to be constant for the temperature range considered)

R

= constant T

= absolute temperature, 'K A

= frequency factor (assumed constant)

This equation is adapted to represent insulation life, y, by assuming that the reaction rate is inversely proportional to the life. This leads to:

In (life) = In (y) = constant + (1/2.303) * (E/RT)

This is a linear algebraic equation representing the logarithm of the life of the motor as a function of the inverse of the motor temperature. Test data from the motorettes aged at an elevated temperature is used to determine the solution of this equation. The solution is then extrapolated to the operating temperatures of the motor to determine its corresponding operational life.

Activation Energy

Arrhenius methodology states that if a material is thermally aged at a temperature of T1 for a duration t,, the equivalent aging duration t2 at a temperature of T2 is given by the relationship:

t2 = tle[K(T2 T1)J where: 4 is the activation energy of the material K is the Boltzmann's constant = 8.617 x IO 5 eV/0K The following two points of thermal aging were chosen from test data per IEEE 275, Test Procedure for Evaluation of Systems of Insulating Materials for A/C Electric Machinery Employing Form-Wound Preinsulated Stator Coils, for use with IEEE Std 101, Guide for Statistical Analysis of Thermal Life Test Data, to calculate the activation energy ()).

The values were obtained from test data of Class B insulation systems applicable to the CPM motor.

Tj = 130'C (403'K)

T2 = 200'C (4730K) t I = 140,000 hrs t 2 = 1,200 hrs Substituting the above values in Arrhenius equation:

[4/8.617xIO '5 (1/473 - 1/403)]

1,200 = 140,000 e 4)= 1.117 eV This value of 4 was used in the following analysis summary to estimate motor life based on expected operating times and temperatures.

Thermal Aging With Increasing Load The determination of consumed life was based on assuming 84,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> of motor operation since installation (10 years less 15 days per year of equivalent outage time), with normal cooling air temperature at a rated 1500 HP load and at a nominal 4000 VAC terminal voltage. The remaining life calculation was found to be insensitive to the assumed operating hours.

During standby duty during the outages the thermal aging effect of the space heaters operating is insignificant.

The calculation was performed for the Class B materials having a life of 140,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> at 130'C as noted above.

Ti = 130'C = 403'K (reference temperature from thermal aging test)

T2 = 50'C ambient + 550C rise + 10C margin = 1 150C + 273 (Kelvin) = 3880K t, =140,000 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> life capability from thermal aging test

[1.117 / 8.617x10 -5 (1/388 - 1/403)]

t2= 140,000 e t2 = 4.85 x 10 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> of aging capability at 50'C ambient Therefore, if the motor has been in service for 10 years and operated at the uprated load, there would be approximately 45 years of remaining life at uprated load and 500C. This shows that there is significant margin in the insulation thermal life.

4.3 Effect On Rotor Assembly The rotor in the CPM motor consists of the shaft, magnetic core, current carrying conductors consisting of rotor bars and endrings. The increased load increases the current, 12R losses, and temperature of the rotor bars and endring. As the temperature increases, the yield strength of the rotor bars and endring decreases. The reliability of the rotor is acceptable at temperatures less than those allowed at the starting limitation, of 200C for copper and 400C for aluminum. The maximum rotor temperature during operation is comparable to the stator winding temperature for values of slip (or load) near rated. Therefore, since the stator temperatures shown in Reference 2 are less than 1301C; there is sufficient margin and the rotor assembly is judged to be acceptable up to the increased load values.

4.4 Effect On Mechanical Components The increased horsepower load on the motor results in a proportional increase in torque on the shaft and rotor assembly, and an increase in the reaction torque on the mounting bolts and stator frame assembly. The rotor assembly and stator assembly have the strength for meeting the speed and torque values of the maximum torque point on the motor speed-torque curve, which is greater than 200% of the rated load torque. Based on the original design analysis for 1500 HP and the full load speed of 1185 RPM, the full load torque is approximately 6646 ft. lbs.

Therefore, the maximum short-term strength capability is greater than 13,000 ft. lbs. This is

greater than the expected torque at 1575 HP of 7000 ft. lbs. Therefore, at the increased load torque, the mechanical components will not be overstressed.

The primary load carrying mechanical components of the rotor include the shaft key/keyway, shaft, rotor core keys, and rotor laminated core assembly. The primary load components of the stator and frame assembly are at a significantly greater radius than the rotor mounted components with correspondingly lower stress for the same torque. Therefore, the rotor components are more limiting from a mechanical standpoint.

The nominal shear stress in the shaft is less than 6000 psi at the design loads. The 5% increase in torque from 1500 HP to 1575 HP will not increase shaft stress above the fatigue endurance limit value of 10,000 psi, and therefore the increased load will not reduce the long term fatigue life of the shaft and major rotor components.

The motor bearings are designed for the weight of the motor rotor, radial and axial loads transmitted through the coupling from the pump, and magnetic and centrifugal forces from the rotor core. The increase in horsepower load will not increase the weight, magnetic or centrifugal forces, however, the axial thrust load from the pump was determined to be higher as a result of the uprated flow conditions as reported by Entergy in Reference 2.

The motor thrust load design is rated for 21,400 lbs continuous and 26,800 lbs momentary downthrust. The peak pump efficiency uprate load of 21,458 lbs slightly exceeds the continuous rating by 0.2%. The closed valve load of 23,348 lbs is within the momentary load rating. An evaluation of bearing thrust capacity was completed and determined that the thrust rating can be increased to 21,500 lbs to cover the slight increase in load at the peak efficiency operating point.

The uprated capacity is shown in the supplemented Data Sheet.

The bearing losses are primarily due to rotational speed. Since the speed does not increase at the increased loads, the heat generation rate will not increase; therefore, the lubrication cooling system design is adequate. The increased load will increase the overall temperature of the winding and increase the heat transferred to the bearing assembly. However, Entergy operating data showed the maximum bearing temperatures to be less than 1620F thrust bearing and 1950F guide bearing, compared to a temperature of 200IF long-term or 205'F short-term (such as one month) for which the bearings are designed to meet minimum allowable film thickness requirements. The increase in load is expected to increase the thrust bearing temperature to a greater extent than the guide bearing temperature. Based on the margin between 1620F and 200'F/205'F, the thrust bearing is judged to be acceptable at the uprated load. The guide bearing loads are not affected by the uprated load and there is margin to the 200'F/205'F allowable temperature.

Therefore the bearings are considered to be acceptable at the increased horsepower loads over the pump operating range.

Since the motor is a rotating machine, increased vibratory forces and differential thermal expansion effects could potentially loosen the assembly at the increased loads. Therefore, prior to increased load operation, and periodically through the remaining plant life, the externally accessible bolting (such as endshield, mounting, conduit box, etc) should be verified to be tight to standard torque values for the size of bolt, and vibration should be monitored and analyzed for indications of loose components as part of normal maintenance.

4.5 Motor Electrical Components The increase in line current due to higher load results in increased current density of the stator conductors and leads. The stator was designed with margin for load increase up to 1.1 5 rated.

Therefore, a power increase of 5% remains within the current density design capability.

The motor internal connections are made ofjumper connections and leads that pass to the conduit box for the external connection. Based on the cross sectional area of the leads, the current density and ampacity values are less than the allowable design and NEC values for the maximum expected current at the overload condition. Other current carrying conductors will not have current in excess of starting inrush current, for which the motor is designed, therefore are not expected to have reduced life from mechanical strain from magnetic loads. Since the increased load does not effect the starting characteristics, the locked rotor inrush current of the motor will not increase.

The magnetic sidepull loads on the rotor are not expected to increase since the airgap flux remains constant because the volts/hertz value remains constant.

Therefore, the increase in load of up to 105% of rated current does not exceed original design criteria or appreciably reduce the operating reliability of the electrical components.

4.6 Effect On Electro/Mechanical Components The increases in line current due to higher load results in increased current density of the stator conductors, stator endturns, stator leads, rotor bars, and endrings. As noted previously, the current densities are acceptable up to 115% of rated power, such that an increase in current density due to power at 105% of rated is acceptable.

The increased current and temperature reduces the yield strength of the rotor bar and endrings and increases the differential thermal expansion of the bars relative to the rotor slots which support the bars. The temperatures are related to the current density, and maintaining the values less than or equal to the design values meets acceptance criteria used in the original motor design for rotor bar and endring long-term reliability.

The motor internal connections are made of circuit rings and leads that pass to the conduit box for the external connection. Based on the cross sectional area of the circuit rings and leads, the current density and ampacity values are less than the allowable design and NEC values for the maximum expected current. The conductors will not have short-term current in excess of the original starting inrush current, for which the motor was designed; therefore they are not expected to have reduced life from mechanical strain from magnetic loads. Since the increased load does not effect the starting characteristics, the locked rotor inrush current of the CPM motor will not increase.

The magnetic sidepull loads on the rotor are not expected to increase since the airgap flux remains constant because the volts/hertz value is constant as the load increases. Constant volts/hertz also keeps the magnetizing current portion of the total current constant.

Increasing the load will increase the electromechanical effects as discussed in IEEE 434. GE "plug-reversal" tests of similar motors found the motor to be capable of 400,000 starting transients without failure. Based on the duration and magnitude of load, an electromechanical aging relationship was obtained and the remaining life estimated.

Therefore, the increase in load of up to 1575 HP does not exceed original design criteria or appreciably reduce the operating reliability of the electrical components.

4.7 Uprated Operating Parameters The GE supplied Data Sheet for the original motor applies with the supplemented data as tabulated below in Table 1. Acceptance criteria for operating parameters not shown in Table 1 are unchanged from the original Data Sheet.

TABLE 1 - Motor Data Sheet Supplement Parameter Original New Power Output (HP) 1500 1575 Speed (RPM) 1185 1184 Current (amps) 195 205 Efficiency 95.2 95.1 Service Factor 1.15 1.10 Ambient Temp. (C) 40 Max 50 max, 3 Mo/Yr 40 max, 9 Mo/Yr Downthrust Continuous, lbs 21,400 21,500

5.0 CONCLUSION

S AND RECOMMENDATIONS The evaluation concluded that the CPM motors have approximately 30 years of remaining life with normal reliability, at the highest expected load of 1575 HP, at 50'C maximum cooling air temperature, within the conditions summarized below. After that time, a review of the latest operating data and an assessment of the motor condition should be performed to determine future maintenance actions. Based on the design margin in the motor, there is no need to rewind or modify the motor at this time to achieve 30 or more years of life at the increased load. No additional maintenance or change in lubrication practice is necessary resulting from the increased load rating.

This evaluation addressed the primary effect of the increased load on motor and did not address the secondary effects, such as, electrical system protection equipment setpoints, additional heat

load to plant HVAC or cooling water systems, power cable voltage drop increase due to higher current, shaft rotordynamics if speed is increased, or effect on equipment other than the motor.

The above conclusions were based on the following conditions:

• The motor has been maintained in accordance with good industry practice since they were originally installed.

• Prior to operating at the increased load, the general condition of the motor should be assessed to show that the motor is in a normal condition for their age. The following assessment criteria should be met; vibration less than 0.3 in/sec (or not in excess of normal operation values), insulation resistance at the breaker greater than 500 megohms, polarization index greater than 2.0, windings not abnormally dirty or oil fouled, bearing oil analyses with no abnormal findings, external bolting is verified to be tight, and general visual inspection without anomalies.

• The motor should be visually monitored and vibration measured when the load is increased beyond established levels.

• If the modification of the pump results in increased rotational inertia, the motor acceleration time should be reviewed relative to thermal limits and time-current relay set points.

• When starting the motor, minimize the BHP load on the motor from the pump.

• The long-term (normal operation excluding starting and transient conditions) motor terminal voltage should not be less than 4000 VAC considering increased voltage drop due to higher load current.

• Motor protection relay setpoints should be reviewed to verify acceptability at a higher current of up to 205 amps during increased load operation at 1575 HP.

• Stator winding temperature alarm setpoints should be reviewed for acceptability during increased load operation that is potentially I 0 C greater than existing load operation.

Shutdown setpoint limit with respect to NEMA should not be changed. If existing Alarm setpoints are in relation to operating temperature, they should be increased 10C to cover increase in winding temperature.

• Although the evaluation determined that the motor are capable of long-term operation of up to 1575 HP, random failures can occur at any time without warning and contingency plans and spare parts should be available.

• The evaluation summarized in this letter report is an engineering assessment using standard assumptions based on the plant data provided, and is not a guarantee by GE that the CPM motor will operate at the increased load without failure.

The input data, evaluation results, and record of independent design verification are contained in DRE 0000-0027-161 1.

If clarification is needed of the evaluation described above, please feel free to call.

Ll -

J. S. Mokri Technical Services (408) 9254678 Verified By:

W. J. Roit Technical Services (408) 925-3578

,4--

cT-4 e_-

a 7S F

Westinghouse Motor Company Engineering Study

Title:

Determine If Motor Shop Order Can Be Re-rated From 1500 HP To With No Physical Changes.

76P0948 1600 Hp Customer: Stone & Webster A Shaw Group Company 100 Technology Center Drive Stoughton MA 02072-4705 Shop Order Number For This Report:

Purchase Order Number For This Report:

Date:

Revised with minor clarifications on 05/04/2004 ES00166 59029-AO03 04/19/2004 Note: the data and conclusions that are presented in this report are derived from the original design folder which may not reflect changes that have been made In the field since that time that have an Influence on these conclusions. The assumption Is also made that the motor has been well maintained and thus Is In an "as shipped" condition, which may not be the case since this motor over 35 years old. Also. all values are calculated.

not guaranteed or verifiable by testing.

Sum mary:

Based on the expected effects on: insulation class, temperature rise, starting characteristics, bearing loading, motor lead cable, speed vs. torque, thermal limits and starting duty limits, the motor on shop order 76P0948 can be rated to 1600 HP, with a 1.00 service factor.

The motor is approved for use in an ambient temperature of 50 degrees Celsius at the 1 600 HP rating.

Jerry R. Avey Manager, Service Engineering UprateES166revl.doc

Discussion Technique:

In order to perform this study, the 76P0948 electrical design was retrieved from the Westinghouse Electric' archives. After this information was obtained, the parameters of the design were entered into TWMC's version of the Westinghouse Electrice design program.

This is a complex task because of the changes that have taken place in motor designs since the 1960's. The computer inputs must be manipulated such that an old design, with the old materials and characteristics, will be generated.

Simulation runs are then conducted until the motor's calculated performance output matches precisely with the performance output of 76P0948. Once this has been accomplished, the original design was "locked-in" and analysis computations were then made.

To determine what, if any, design margin exist in this motor, temperature rise, safe stall times, acceleration times and torque output was studied. To aid in this analysis, performance curves were also generated and are attached.

The following table compares the operation of the 1500 vs. 1600 rating.

Calculated with WYE At 1500 Horsepower At 1600 Horsepower connected winding Line Voltage [4.0 KV]:

Full Load Rpm 1182 1181 Power Factor 92.8 92.7 Full Load Torque 6662 Ft-Lb.

7115 Lb.-Ft Full Load Amps 184 197 Efficiency 94.4 94.3 Temperature Rise At

• 450C At 1.00 S.F.

550CAt 1.00 S.F.

1.0 Service Factor (value obtained from Calculated 1966 test data)

Ambient Temperature 400C 500C UprateES166revl.doc

• When investigating the capabilities of the original machine, actual test data, when available, is always preferred over calculated values. Since a load test was performed when the motor was originally tested by Westinghouse Electric, this value is shown in lieu of the calculated value for temperature rise.

The engineering test was performed at 1.00 S.F. instead of at the nameplated 1.15 S.F. This was normally done when the rise guarantee made at the time the order was negotiated, was at the 1.00 rating. Obtaining test data at also the 1.15 rating would have required Westinghouse to perform two separate test. According to the files, this extra test was not done because only the 1.00 test data is contained in the archives.

Bearings:

Bearing temperature rise in an electric motor is primarily a function of the weight of the rotor, the R.P.M. of the shaft and the type of lubrication. Since an increase in rating will not warrant a change in the rotor, the bearing temperature should remain approximately the same. However since the internal air in the motor is circulating around the bearings and this air temperature will increase under the higher load, there maybe a noticeable rise in bearing temperatures.

There is insufficient data to accurately calculate what the rise will be at the higher horsepower but a general rule of thumb is that the bearings will be running in the area of 50C [or less] higher temperature.

It should be noted that the published motor bearing temperature limits are based on the capability of the lubricant since the babbitt material melting point is very high [4400 F/2400]. When bearings operate at higher than normal temperatures, service life may suffer due to a deterioration of the lubricant oil film thickness and quality.

If the higher load presents a problem with higher bearing temperatures then the user is recommended to change from a mineral oil base lubricant to a synthetic after which any bearing temperature monitoring settings can be raised to:

• run temperature: 1100 C, (230 deg F)

• alarm temperature: 1200 C, (248 deg F)

• shutdown temperature: 130° C, (266 deg F)

UprateES166revl.doc

Noise:

There will be no noticeable change in motor produced noise when operated at the higher rating.

Environmental:

The ambient temperature this motor is allowed to operate in is being increased from 400 C to 500C.

The increase in HP output and ambient temperature will cause the motor surface and exhaust air temperatures to increase. The corresponding exhaust air temperature will be approximately 8 deg. C higher than before. [Note: we are unable to calculate the exact values]. This is a warning that the motor will be hotter to the touch and the higher exhaust temperatures could be disturbing to surrounding personnel and equipment Starting duty:

Based on the temperature rise of the rotor and stator components during hot and cold starting, the starting duty shall be 2 cold and 1 hot.

Maintenance:

Operating the machine at the higher load will not necessitate a change in the frequency or maintenance procedures that have already been established.

Conclusion with assumptions:

Assumptions:

1.

The load torque and load inertia values are equal or less than what the motor was originally designed for.

2.

The motor insulation is the original Westinghouse Electrico Thermalastice and in "like new" condition.

==

Conclusion:==

There is sufficient electrical and mechanical design margin to allow the existing motors to operate at 1600 Hp in a 500C ambient with no physical change to the motor.

UprateESl66revl.doc

Motor nameplate at 1600 hp Motor type CS VSS DP induction motor Style Vertical Frame CS 41 Horsepower 1600 Time rating continuous Temperature rise by detector 75 OC Service factor 1.0 Full load speed 1 1 81 rpm Rated voltage 4000 / 2300 VAC Full load current 197/ 343 amps Rated frequency 60 Hz Number of phases 3

Locked kva/hp code E

NEMA design code B

Rotor type Brazed squirrel cage Insulation class B

Ambient Temperature 50 0C Enclosure Open Drip Proof UprateES166revl.doc

Starting and thermal limit curves:

See attached 1600 Hp curves at 100% and 80% operating voltages.

UprateES166rev1.doc

TECO-WESTINGHOUSE MOTOR COMPANY ROUND ROCK, TEXAS U.S.A.

CUSTOMER STONE & WEBSTER CUSTOMER ORDER NO.

APPLICATION PUMP S.O. ES0166 DATE -

APR 19, 2004 DATA FOR WORLD SERIES, HORIZONTAL, BRACKET TYPE INDUCTION MOTOR

1. RATING HP RPM FL VOLTS AMPS FL PHASES 1600 1181 4000 197 3

HERTZ SERVICE FACTOR RISE C (1.00 SF)

METHOD AMBIENT C 60 1.0 75 RTD 50 INSUL CLASS B

KVA CODE E

DUTY CONTINUOUS

2.

MECHANICAL FRAME CS VSS DP ENCL TYPE ODP ROTATION (ODE)

CW BRG TYPE LUBE TYPE NO. BRGS SLEEVE SELF 2

END PLAY INCH MOTOR WK SQ LOAD WK SO 0.50 2469 5000

3. STARTING PERFORMANCE -

NOMINAL, VALUES WITH (*) ARE GUARANTEED AMPS (LR)

AMPS (LR)

POWER FACTOR START TORQUE ACCELERATION SEC 100% VOLTS 1050 533 21.3 84 4.0 80% VOLTS 811 412 20.5 50 7.1 SAFE LOCK SEC SAFE LOCK SEC FROM HOT FROM COLD 12.4 14.6 20.8 24.3 PULLOUT TORQUE AT 100% VOLTS = 243 %

4. EFFICIENCY -

NOMINAL LOAD 115 EFFICIENCY

% 93.85 100 94.30 75 94.77 50 94.59

5. POWER FACTOR - NOMINAL LOAD 115 POWER FACTOR % 92.2 100 92.7 75 92.8 SO 91.1

6. POWER FACTOR CORRECTION MAX KVAR =

175 MAX FL P.F. = 96.6 %

A_

A_

Curve 1 of 4 i

GnphiC 7.1 Apr. 9. 2004 9:4752 AM Induction Motor Starting Characteristics Calculated at 100% Line Voltage Design.ID ES0166 Customer STONE & WEBSTER Engineer FANSLOW Application PUMP Poles 6

Volts 4000 Rpm(fl) 1181 Load Curve ASSU Hp 1600 Fl Amps 197 Rpm(syn) 1200 Lock Amps(%)

Pf 0.93 Frame 0

Load Wk2 5000 Fl Torque(lb-ft) 71 Phase 3

Hertz 60 Motor Wk2 2469 Lock Torque(%)

Velion 1.0.5 NMED 533 l15 84 100 90 -

80 P.,I I

4)

En'60 0

2 0 con% 40.

30 20 10 I

X l - X & lI - -

r - - - r - - i - -

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---

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• 1 e(sec)= 4.00 Ps Ai % Torque

)0% Current 0o 590 1Q0 1~0 290 6(

)

120 240 360 480 TECO-Westinghouse Motor Company Signature WICV.4 7aince.f1w Round Rock, Texas Curve No.

-1

Curve 2 of 4 GnphiC 7.1 Apr. 9. 2004 9:47:52 AM Induction Motor Starting Characteristics Calculated at 80% Line Voltage DesignJD ES0166 Customer STONE & WEBSTER Engineer FANSLOW Application PUMP Verdon 1.0.5 Poles I

Hp 160 Pf 0.9 Phase 100 90 80 wo 70 m 60 0

° 50 i 40 e-6 0

3 3

Volts 4000 F1 Amps 197 Frame 0

Hertz 60 Rpm(fl) 1181 Rpm(syn) 1200 Load WO 5000 Motor 'Wk2 2469 Load Curve ASSUMED Lock Amps(%)

412 F] Torque(lb-ft) 7115 Lock Torque(%)

50 J-I-

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7 e(sec)= 7.08 50 % Torque D00% Current 30 20 10 0

I 5,

190 1$0 290 2:

61

)

120 240 360 480 TECO-Westinghouse Motor Company Signature

7roJ, JAvukw.

Round Rock, Texas Curve No.

-2 A.

Curve 3 of 4 GnphiC 7.1 Apt. 9. 2004 9:4752 AM Time vs Current and Thermal Limit Curves Vernon L.UZ 1'

1'

laUU, Customer-STONE & WEBSTER Design.ID ES0166 Engineer FANSLOW 4000 Vwolts 03 1600 HP 0 Frame O

_______L---L--\\---L---W------F-3 PH 1200 RPM(Syn)

LL L-60 HZ 1181 RPM(FL)

L---.L..

Volts Acc.Time(sec)

§ A) 100%

4.00 B) 80%

7.08

____ L___

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at Ambient i

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):

Load Torque Curve No.

ASSUMED PUMP I

I I

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I I

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90 180 270

% Current 360 450 540 TECO-Westinghouse Motor Company Round Rock, Texas Curve No.

-3 Signature

7aJ, w

Curve 4 of 4 OGphiC 7.1 Apr. 9. 2004 9.4752 AM Time vs Current and Thermal Limit Curves Va Customer-STONE & WEBSTER rsion l.O.5I I

.i II I

I 102 03 100 0 lo, 10° lo-,

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a DesignID ES0166 Engineer FANSLOW 4000 Volts 1600 HP 0 Framl 3 PH 1200 RPM(S 60 HZ 1181 RPM(1 Volts Acc.Time(soe A) 100%

4.00 B) 80%

7.08 lo (Syn)

[FL)

I I

I Thermal Lin Motor Initiall at Operating Temperature 7

a a

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Acc.Time vs Current a

WI FL Torque

= 7115 lb-ft a

Lock Torque = 5953 lb-ft-FL Amps

= 197 amps a

Lock Amps

= 1050 a-,

Motor Wk2 =

2469 ft2 Lnoad WI?2

=

SOOOl lh-ft2 a

a a

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Load Torque Curve No.

ASSUMED PUMP I

a I

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a a

a 0

90 180 270

% Current 360 450 540 TECO-Westinghouse Motor Company Round Rock, Texas Curve No.

-4 Signature 772aAL Yao -

A TEWO-Westinghouse (@

M O

T O R

C O

M P

A N

Y Oil Lubrication WARNI NG: Motor must be at rest and electrical controls should be locked open to prevent energizing while motor Is being serviced.

Use a premium quality turbine oil [see Table 3] which is fully inhibited against oxidation and corrosion.

The for sleeve bearings, the oil should have an ISO cleanliness code [target) of 17/15/12.

Oil is added to a bearing by pouring through the oil fill hole at the top of each bearing housing. Add oil until the oil level reaches the center of the oil sight gauge window. See the motor outline drawing for the approximate quantity of oil required.

Frequent starting and stopping, damp or duty environment, extreme temperature, or any other severe service conditions will warrant more frequent oil changes.

Use Viscosity range noted in Table 1 unless lubrication plate or outline drawing on motor indicates otherwise. See Table 2 for viscosity comparisons.

Table 1: Recommended Oil Type Ambient Speed In RPM Oil Viscosity Re-lubrication TemperatureGrade I

nterval Below 501F All Speeds Considered a severe service (10 °C) condition which may require sump heaters.

500 to 1 040F 3600 ISO 32 5000 Hours or (10° to 400C)

Everv 12 months 1800 or less ISO 68 Every 12 months Above 1040F All Speeds Considered a severe service (400C) condition. Consult TECO! Westinghouse Service

• Unless noted otherwise on outline drawing or motor lubrication nameplate.

• WARNI NG: Frequent starting and stopping, damp or dirty environment, extreme temperature, or any other severe service conditions, will warrant more frequent oil changes. It is therefore recommended that oil sampling be made every 500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br />.

Table 3: Some Recommended Oils ISO VQ 32 ISO VG 6B Viscosity: 13D165 SSU at 100 F viscsity84-2 4? SSU at 100F Oil M~anufacturer haA~nE ASAE OIL SYNTHETIC BASE OIL

__i_-

3S I

SYNTHETIC BA-S-E-1OL Chevron USA. Inc.

GST TurnbneirOd32 T~gm 32 GST Turbine O0168 Togra 68 Conoco 01l Co.

Hydiccloar Syno~n 32 Hydroclutr Srnco 68 Tuibine Oil32 Tufbine Oil 6a Exxon Co.. USA Tresslic 32 Syn~nosic 32 Tarasstc 68 Synhosfic E8 MOWi Oa Co.

DTE 01 Light SH-C 624 DTE Oil Hoavy Mod=un SHC 626 Pennzoil Co.. fInc.

Ponvnzbeol TO 32 Pomubol SHD 32 Porm~bell TO 68 PennzbelU SHD 68 Philips PetroIoumn Co.

Magnus 32 SynciistrW E'32 Magnus 68 Syndustrial'E 68 ShI Oil Co.

Tellus 32 TQllus HD Oil T6lus 68 Tollus HO Oil AVISHF 32 AW SHF 68 Texaco Lubricants Co.

Regal32 Cetus PAO 32 Pogal613 Wous PAO 6 Bearing Temperature: The following is a list of standard temperatures for both mineral-oil-lubricated and synthetic-oil-lubricated bearings.

Mineral-oll-lubricated bearings:

• Expected running temperature: 800 C, 353 Kelvin (176 deg F)

• Alarm temperature: 900 C, 363 Kelvin (194 deg F)

• Shutdown temperature: 1000 C, 373 Kelvin (212 deg F)

Synthetic-ol1-lubricated bearings:

Expected Run Temperature: 110° C, 383 Kelvin (230 deg F)

Alarm Temperature: 1200 C, Kelvin (248 deg F)

Shutdown Temperature: 1300 C, Kelvin (266 deg F)

These temperatures apply to grease-lubricated as well as oil-lubricated bearings. In addition, new bearings often require a break-in period of up to 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />. During this time, temperatures and noise levels can be slightly elevated. However, these levels should decrease somewhat after this break-in period.

Jerry Avey Manager Service Engineering

Table 2. Comparative Viscosity Classilicaflons Kinematic Viscosities cSt cSt

@40T

@1000C 2000--

ISO AGNIA VG Grade SAE SAE Crankcase Gear 1000-800-600-500-400-300-200-

-70

-60 50

-40

-30 20

-10 9

8 7

6 5

-4 Saybolt Viscosities Sus Sus

@100¶F

@210'F 10000 8000 300 6000 5000 4000

-200 3000

-I 100--

80-60-50 40-30 -

20-Mt-jew-

.-
l

-2000

-1500 1000

-BOO

-600

-500

-400

-300 200

-100

-90

-80

-70

--60

-55

-50

-45

-40

---

11M__E~

-l

-150

-100 10 -

-60 10-

-60

.