Text

Rev 1 to Technical Specification, NPSH Transient Study RHR and Core Spray Pumps, E12.5.1296
	ML062920156
Person / Time
Site:	Browns Ferry
Issue date:	09/13/2006
From:	Schoenbrun S; Sulzer Pumps (US)
To:	; Office of Nuclear Reactor Regulation
References
	E-001-21417, TAC MC3743, TAC MC3744, TAC MC3812, TS-418, TS-431 E12.5.1296, Rev 1
	Download: ML062920156 (73)
	v • d • e

ENCLOSURE 1 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN)

UNITS 1, 2, AND 3 TECHNICAL SPECIFICATIONS (TS)

CHANGES TS-431 AND TS-418 -

EXTENDED POWER UPRATE (EPU)

NPSH REQUIREMENTS -

PUMP VENDOR REPORT (TAC NOS. MC3812,

MC3743, AND MC3744)

NPSH TRANSIENT STUDY, REV.

1

SULZER QUALITY LEVEL o

Direct Indirect SULZER PUMPS (US) INC. DOCUMENT DOC. NO:

E12.5.1296 ORDER NO:

E-001-21417 TITLE:

NPSH Transient Study RHR and Core Spray Pumps ASME CODE SECTION CLASS NO.

CODE EDITION (YEAR)

SEASON YEAR CUSTOMER TVA PROJECT Browns Ferry NPS CUSTOMER P.O. NO.

SPECIFICATION NO.

CONTRACT NUMBER ITEM/TAG NUMBER CUSTOMER APPROVAL NUMBER:

CUSTOMER APPROVAL REQUIREMENT IF Yes 0 No 0 Information Only CERTIFIED AS A VALID SULZER PUMPS (US) INC. DOCUMENT SPACE FOR CUSTOMER APPROVAL STAMP (when applicable/available)

O3 For Outside Vendor ElFor Manufacture at Sulzer Pumps (US) Inc.

O Risk Release Inspection Report #

o3 Other (specify)

I CERTIFICATION (when applicable)

This Document is certified to be in compliance with THE APPLICABLE PURCHASE ORDER, SPECIFICATIONS, PROCEDURES, AND ADDITIONAL REQUIREMENTS LISTED IN THE APPENDICES.

Originating Advance Engineering Dept:

By:

Steven Schoenbrun

Title:

Project Engineer Initial 9/13/2006 Date:

APPLICABLE S.O. NUMBERS:

El 2.5.1296 Rev D Rev.

DOCUMENT IDENTIFICATION Professional Engineer State Registration No.

Date

SULZER August 14, 2006 Suizer Purmps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 PURPOSE: To review existing pumps to determine if they are capable of meeting new transient NPSHa conditions and estimate the expected pump life based on 8000 hours0.0926 days 2.222 hours 0.0132 weeks 0.00304 months and limited NPSH values. Minimum flow evaluation is not a requirement of this study.

KNowN: The existing pumps are RHR [Residual Heat Removal] and CS [Core Spray]

SULZER serial numbers: 50270671/82 and 50280253/64. Pumps were originally supplied to General Electric Company.

RHR pumps [50 270671/82] are SULZER model 18x24x28 CVIC:

o Pumps are single suction vertical inline type with welded inlet and outlet connections; o

Units are rated 10000 gpm @ 560 feet on ambient water; o

Electric motors are rated 2000 hp @ 1785 rpm on 4000/3/60 Hertz power; o

Estimated weight is 20000 lbs with a height of 150 inches from the foundation.

Construction Features are as follows:

o Cross Section D27358 with parts list; o

Pump case is carbon steel; o

Pump rotor is chrome steel and the impeller has integral wear rings; o

Pump shaft is connected to the electric motor via a rigid coupling; o

Pump thrust is taken in the driver.

Available information and test data:

o Certified performance tests 27872, 27935, 27811, 27936, 27801-04, 28267 and 28941-43; o

Internal SULZER tests for information and development, note these are not available for publication; o

Original test records have been lost or archived at a site unknown at present; o

Existing records limited to internal hardcopies and microfiche; o

One of the original test engineers is still with SULZER in a similar capacity.

Core Spray (CS) pumps [50 280253/64] are SULZER model 12x16x14.5 CVDS:

o Pumps are double suction vertical inline type with welded inlet and outlet connections; o

Units are rated 3125 gpm @ 582 feet on 210 degree F water; o

Electric motors are rated 600 hp @ 3580 rpm on 4000/3/60 Hertz power; o

Estimated weight is 8730 lbs with a height of 112 inches from the foundation.

Construction Features are as follows:

o Cross Section Z6315 and parts list; o

Pump case is carbon steel; o

Pump rotor assembly is chrome steel and the impeller has integral wear rings; o

Pump shaft is connected to the electric motor via a rigid coupling; o

Pump thrust is taken in the driver; 2/36 August 14, 2006

SULZER August 14,2006 Suzer Pumps

)nTransient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 Available information and test data; o

Certified performance tests 27376B-79B, 27970-73 and 28022-25; o

Internal SULZER tests for information and development, note these are not available for publication; o

Original test records have been lost or archived at a site unknown at present; o

Existing records limited to internal hardcopies and microfiche; o

One of the original test engineers is still with SULZER in a similar capacity.

Both RHR and CS pumps are being evaluated for their response to potential transient conditions that may occur due to various system scenarios. TVA Browns Ferry has provided system transient scenarios; data includes flows, times and available NPSHa data for both the RHR and Core Spray Pumps, as follows:

Event buration RHR Pump Flow RHR Min CS Pump CS Min NPSHA Flow NPSHA ST-LOCA

<10 min 11500 gpm (broken 26.4 ft 4125 gpm 26.5 ft loop) 10500 gpm (intact loop) 29.4 ft LT-LOCA

>10 min to 24 hrs 6500 gpm 38.5 ft 3125 gpm 35.1 ft ATWS 8 hrs 6500 gpm 24.3 ft none none APP R 60 hrs 9000 gpm 26.9 ft none none SBO 24 hrs 6500 gpm 32.2 ft none none Table 1: Potential Transient Events Methodology (RHR & CS Pumps): This study utilizes empirical and theoretical NPSHA/R data and calculations to make NPSHr recommendations for transient responses.

For both RHR & CS pumps test and order related data/information was collected for evaluation:

o All certified tests were collected; o

Available development/model test results were located and copied; o

Product test records/notes were collected; o

Individual Bill of Materials were copied; o

Field records were assembled.

As a basis for evaluation, certified witness test performance curves, for both pump sets, were averaged to produce an "average performance" for each pump type. Development test data was used to create NPSHr curves, at 1% and 3% head loss, for both models.

Theoretical NPSHr calculations utilize Sulzer's current standard for recommended (40k hours at BEP) NPSHr and "cavitation free" NPSHr from "Centrifugal Pumps: Design &

Application", 2 nd Edition, Lobanoff & Ross, Gulf Publishing, 1992.

3/36 August 14, 2006

SULZER ugust 14, 2006 Sulzer Pmps (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 Minimum NPSHa vs. NPSHr evaluation is accomplished by plotting/comparison of calculated and empirical NPSH data to determine hydraulic/mechanical implications of transient events.

Technical Background for Analyzing NPSH test data: To evaluate the response of a pump to a transient event, and make a meaningful prediction for post event operating life, the behavior of the pump in the NPSH "knee" must be thoroughly understood.

NPSH performance assessments are related to the knees of the plotted NPSH data. Plots of NPSH vs. head (from NPSH test data) as the NPSH is reduced incrementally from ample suction pressure, will show that the head responds by staying constant, varying or dropping:

o The "knee" is the area on an NPSH test curve where the head degrades more rapidly before falling off totally.

The shape of an NPSH knee is an important factor in recommending minimum NPSHr values. A knee may have a sharp or more rounded profile, each with its own implications:

o When the knee is sharp, various head drop comparisons (1%, 3%, 6%, etc.) occur at about the same NPSH value.

o Operation near a sharp knee is not recommended.

o In a well-rounded knee the various head drop comparisons occur over a wider range of NPSH values. The wider range of response allows operating recommendations with less margin.

NPSH data for both pump models is from development testing. Aspects of data collection include:

o Several test points are required to define a knee.

o Occasionally, test stand limitations do not allow suppression to a low enough NPSH to completely define the knee - i.e. the 3%, 6%, drop-off points may not be captured on test. Under some conditions these tests can still be used to evaluate acceptable operation in response to a transient event.

o If the head remains stable below the minimum proposed transient event NPSHA, the test is still a good validation tool - i.e. while the head may not have degraded enough to define the knee,in response to a lowering of the NPSH (a true "knee" has not been established), the stable head response shows that the pump is suitable for operation.

Modeling from similar pumps is another long established pump industry method with a basis in ANSI/Hydraulic Institute, ASME and other standards. Size factored NPSHr values (from models of similar pumps) are commonly used to make NPSH recommendations.

o Modeling has not been used in this study.

4/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 RHR Pump NPSH Assessment and Analysis: Test and calculated NPSH values are analyzed and compared against the proposed transient events.

Performance curves 27935, 27811, 27936, 27801-04, 28267 and 28941-43 have been averaged relative to head and efficiency vs. flow and plotted as curve RHR I. For the basis of NPSH assessment, test points for NPSHR-3% and NPSHR-1% (4 capacities) have also been plotted on curve RHR I based on development testing (NPSH test data has been tabulated in Appendix A).

Specific speed (Ns) and Suction Specific Speed (Nss) for both 3% and 1% head loss are as follows:

o Ns

= 1785*860012/6563/4 = 1277 NSS-3% = 1785*86001/2/163/4 20692 o

Nss-l*% = 1785*86001/2/29.53/4 = 13077 SULZER STANDARD CLEARANCES I-t.

LU LU LL_z CJ LU I RHR I 90 o0z 80 70 LIJ a_

60 >

50~

40 30 3000 20

-2000 8C0 70 0

a.I

!01 - 1000 0

2000 4000 6000 8000 10000 12000 14000 GALLONS PER MINUTE

[TVA SE

-,A 18 X 24 X 28 CVIC 1 STAGE BROWNS FERRY2750 1.85 RPM ALABAMA 1785 RP RHR nUMPS USA.21417-Fl

-EYE 3,1 I

ks..

W Ja SýOQ NO4 ý7D71;82 E0T.-21417.c:S C

JS CDM

-- AJG-CC 169.3 AVG PERF RHR I Curve 1: RHR Average Performance 5 /36 August 14. 2006 I

SULZER August 14, 2006 Sulzer Pwmps Jus) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 Results of the "Cavitation Free" NPSHR calculation (based on Lobanoff and Ross) are as per the following table.

Flow NPSH 5000 gpm 96.5 feet 7000 gpm 75.3 feet 9000 gpm 71.2 feet 10500 gpm 74.1 feet 12000 gpm 75.3 feet Table 2: RHR "Cavitation Free" NPSH The calculation set (5000, 7000, 9000, 10500 & 12000 gpm) is collected in Appendix A. A sample calculation follows:

"CAVITATION FREE" NPSHr CALCULATION o =

5 (GPM) Flow.

N =

1 (rpm)

A-B =

3 (in2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AE =

1 (in2)

Impeller eye area.

B1 =

1 (deg.) Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lobanoff and Ross).

K1 =

From Lobanoff & Ross Figure 8-18.

D, =

5 (in.)

Impeller eye diameter CM,

= -9.482 (ft./sec.) Average meridianal velocity at blade inlet (.321Q/AE).

UT

=

(ft./sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(0) =

0 Impeller inlet velocity ratio (CM1/UT).

8 =

4 (deg.) Angle of flow approaching blade.

a =

6 (deg.) Angle of incidence (Bl-theta).

K2 =

0 From Lobanoff & Ross Figure 8-19.

C8 =

0 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 {[(K 1+K2)Cm1 2/2g + K2UT2/2g]CB)

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 6/36 August 14, 2006

SULZER August 14, 2006 sutzePr US) uInc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 "NP5H-lRecommended" calculation results are tabulated below. The calculation set (5000, 7000, 9000, 10500 & 12000 gpm) is collected in Appendix A.

Flow NPSH 5000 gpm 45.6 feet 7000 gpm 31.9 feet 9000 gpm 33.5 feet 10500 gpm 42.9 feet 12000 gpm 99.8 feet Table 3: RHR "Recommended NPSH" A sample "NPSH-Recommended calculation follows:

"NPSH RECOMMENDED" CALCULAION a

Q13EP Q'QBEP SN SEN ST Sm SLG Nss(3%/)

Nss(REF)

Es NPSHR(3*/o)

FOT

-L~Vc 0.5814

=

1.84

=

1.12

=

0.97

=1121

= LI]>

=

13390

=

9300

=

1.1999

=

19 3PM) From performance curve 3PM) From performance curve (NPSHR - 0% / NPSHR-3%) = Function of Q'/QBEP Function of purnpage and NPSHR(3%)

Function of temperature and NPSHR(3%)

Function of impeller material and pumpage deg.)

SLG = 1.2 ; Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Suction specific speed at 3%

Suction specific speed at reference

{sqrt(N83(30/o) / N,,(REF))} for water if Nss(3%) > 9300 = N.(REF)

(ft)

From performance curve FcT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/FCT to allow for Casting and measuring Tolerances.

FCT = 1.0 In this study (ft)

NPSHREc = SN X SEN X ST X Sm X SLG X F, X NPSHR(3%) x FCT NPSHREc

=

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 7/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (

Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 Results of both the "NPSH-Recommended" and "Cavitation Free" calculations, as well as the test curves for 1% and 3% head and drop, are plotted on Curve RHR II:

SULZER STANDARD CLEARANCES I RHR II 1*

-[

!T I IrrII 220 200

180 CAV ATI011 FETý NPSHI24Ri fIN-lo2 AT A,

S80 0

2000 4000 6000 8000 10000 12000 14000 GALLONS PER MINUTE IVX

"LZER

,AA 18 X24 X 28 CVIC 1 STAGE BROWNS FERRYA SULZE 2750"

°4 1785 RPM ALABAMA 26.88' 1

RHRPUMPS USA.21417-F1 EIARAS-Q-'J

"-NCE IE13CVIC C,,,,,.o NC

__O _NO 270671!82 EXII-21417-CD SJS LM.3-SEP--0 1693 AVG PERF RHR II Curve 2: RHR Test and Calculated NPSH "Recommended" NP5H (as plotted) is Sulzer's theoretical recommendation for 40,000 hour0 days 0 hours 0 weeks 0 months life, based on limited cavitation damage to the impeller.

o Comparison to the "cavitation free" curve (Lobanoff & Ross) shows that some cavitation occurs at the "recommended" NPSHr. The slight erosion damage that occurs at this level is the basis for 40,000 hour0 days 0 hours 0 weeks 0 months criterion.

NPSHr curves based on 1% and 3% head loss are from development tests of these impellers, and represent the standard (Hydraulic Institute) method for determining NPSH; o

The same comparison as above demonstrates that slight cavitation will occur at these NPSH values.

8/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 When the previously tabulated transient NPSHa cases are compared to the plots of RHR II, it is seen that the minimum NPSHa value from each event, except for the ST-LOCA-BL is equal, or greater, than the (standard) 3% curve at the same flow:

o LT-LOCA is above the "Recommended" NPSHr curve; o

APP R, ATWS and SBO are between the 1% and 3% head loss curves; o ST-LOCA-IL (10500 gpm) is above the 3% head loss curve; o

ST-LOCA-BL (11500 gpm) is below the 3% head loss curve.

Since some cavitation exists at reduced NPSHa scenarios, a graph defining NPSHr vs.

Operating Life (Curve 3 - as follows) based on mechanical damage (erosion) estimates has been developed in addition to the preceding NPSH analysis.

8000 hours0.0926 days 2.222 hours 0.0132 weeks 0.00304 months (-1 year) has been selected as an adequate post transient event operational life. This is an estimate of the minimum life expectancy that will produce similar damage (during low NPSHa events) as that expected from an impeller operating with NPSHa above the "recommended" (40,000 hour0 days 0 hours 0 weeks 0 months ) NPSHr curve:

o At the graphical NPSHr values for the origin (.01 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ) these are high suction energy pumps. The resulting lack of sufficient NPSH margin would result in life reduction (due to cavitation damage) if operated continually in the suppressed state; o Sulzer's graph provides a guideline for operating at the lowest possible NPSHa, while requiring an increase, over time, adequately removing enough energy from the pump to prevent catastrophic failure; o

The recommended minimum NPSHr (time.01 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ), at all flows, range from slightly above 3% up to 6% head loss.

o Based on post-test inspection of the tested pumps the graph is conservative since the inspected impellers showed no damage; o

Pumps were run for extended periods (2-3 hours) at 1% to 6% head loss without losing suction, despite surging, noise and increased vibration; o

Several tests included NPSHa reduction to initiate loss of suction.

Pumps recovered, with no visible damage, after NPSH was restored; o

NPSHa increase over time, as dictated by the graph at a given flow, insures that recommended NPSH levels/duration will be less severe than that experienced during testing.

9/36 August 14, 2006

SULZER August 14, 2006 Sulr Pps "us' Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 hours 0.01 0.1 1

10 100 1000 8000 x6 w

U-Z (D

a,)

15 0.01 0.1 1

10 100 1000 Operational Hours Curve 3: RHR NPSHr vs. Operating Life 8000 10 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 RHR Results and

Conclusions:

The subject pumps have been analyzed and found to be suitable for reduced NPSHa operation, as described above, with equipment in "as new" condition, with exceptions as noted.

Curve 3 provides a guideline for operational life vs. NPSHa as a general recommendation for operation when the pumps may be subject to transient events outside of their original scope.

Recommendations are also provided specifically to address the potential transient events provided by TVA Browns Ferry:

o Transient events identified as LT-LOCA, ATWS, SBO, APPR, ST-LOCA-IP all provide NPSHA values above the minimum established NPSHr, as established in the operating life graph (curve 3). They meet the criteria for determining operational life vs. NPSHa from the graph.

o The ST-LOCA-BL event provides NPSHA values below the required NPSH shown on the graph.

Analysis methodology compared test derived NPSHr values with those predicted theoretically. The pumps were evaluated against this comparative basis in order to predict the remaining operational life of a pump in the aftermath of a transient event; o

An 8000 hour0.0926 days 2.222 hours 0.0132 weeks 0.00304 months post-transient operational lifetime was developed, based on similar cavitation damage to the 40,000 hour0 days 0 hours 0 weeks 0 months "recommended" NPSHr curve; the curve is well supported by the NPSH analysis and mechanical response on the test stand; o

Graphical NPSHa levels and duration are less severe than that actually experienced on the test stand; o

Empirical test information has been verified by one of the original test Engineers; o

Despite NPSH testing that was more severe than the "recommended" curve, post-test inspection revealed no damage.

When pumps are in an "undamaged" condition they can be operated in accordance within the NPSHA guidelines provided with the expectation of the 8000 hour0.0926 days 2.222 hours 0.0132 weeks 0.00304 months life described.

LT-LOCA, ATWS, SBO, APPR and ST-LOCA-IP transient scenarios are within the operating recommendations established in curve 3:

o Although vibration and noise may increase as a result of the transient events the units should continue pumping; o

Any non-detrimental impeller wear will be in accordance with the operational life graph.

11/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Sulzr Pmps US)IncRevision 1, 10/05/2006 The ST-LOCA-BL scenario falls outside of the established operating recommendations:

o Although vibration and noise should increase due to surging and cavitation from the transient event, the units should continue operation; o

Some detrimental damage is likely, due to the transient event, but should not be catastrophic. After 10 minutes, if the operational life graph is followed the pumps will continue to function.

12/36 August 14, 2006

August 14, 2006 SULZER Transient NPSH Study E 2.5.1296 Sutrer Pumps (US) Inc Revision 1, 10/05/2006 CS Pump NPSH Assessment and Analysis: Test and calculated NPSH values are analyzed and compared against the proposed transient events.

Performance curves 273768-79B, 27970-73 and 28022-25 have been averaged relative to head and efficiency vs. flow and plotted as curve CS I. For the basis of NPSH assessment, test points for NPSHR-3% and NPSHR-1% (3 capacities) have also been plotted on curve CS I based on development testing (NPSH test data has been tabulated in Appendix A).

Specific speed (Ns) and Suction Specific Speed (Nss) for both 3% and 1% head loss are as follows:

o Ns= 3580*30251/2/6273/4= 1571 o

NSs-3%= 3580*((3025/2)1/2)/213/4= 14193 o

Nss-Z% = 3580*((3025/2)1/2)/223/4 = 13706 SULZER STANDARD CLEARANCES I CS I F

L W

LL 0

J L

14 Z

--+

*1-20 00 *z

.LCJ I

Z 500

+

60 1000 I40 F-H --

+-bi+1HV 30 800

-20 2600 1 0 -400 4- 0 L 200 0

1000 2000 3000 4000 5000 f>000 7000 GALLONS PER MINUTE ShAL U

Z 12 X 16 X 14.5 CVDS 1 STAGE 6RCVVNS FERRY 140LPATI38 ALABAMA Z

14-0" 142xl4.1 3282 RPM CORESPRAY PUMPS USA.21417-FI EYEA=SAQ %I

-.c,=AENCE I

21QCv35-4

[

C 1

S C"O *7OJV.2 rCC1-2 4'--,S SJSCDM 31-A-C236 61 AVG PERF CS I Curve 4: CS Pump Average Performance 13/36 August 14, 2006

SULZER I August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 Results of the "Cavitation Free" NP5HR calculation (based on Lobanoff and Ross) are as per the following table.

Flow NPSH 2000 gpm 159 feet 3000 gpm 126.3 feet 3750 gpm 87.6 feet 4500 gpm 76.7 feet Table 4: CS "Cavitation Free" NPSH The calculation set (2000, 3000, 3750 & 4500 gpm) is collected in Appendix A. A sample calculation follows:

"CAVITATION FREE" NPSHr CALCULATION Q =

2 (GPM) Flow.

N =

3 (rpm)

A-B =

122.4 (in2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AE =

6 (in2) Impeller eye area.

B1 =

1 (deg.) Blade inlet angle.

(A-B)/AE =

2

(%)

Area ratio (From Lobanoff and Ross).

K1 =

From Lobanoff & Ross Figure 8-18.

Dt =

6 (in.)

Impeller eye diameter CM1

=

1 (ft./sec.) Average meridianal velocity at blade inlet (.32 1Q/AE).

UT =

1 (ft./sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(e) =

0 Impeller inlet velocity ratio (CMj/UT).

e =

5 (deg.) Angle of flow approaching blade.

a =

1 (deg.) Angle of incidence (B1-theta).

K2 =

0 From Lobanoff & Ross Figure 8-19.

C8 =

0 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 ([(K1+K2)CM1 2/2g + K2UT2/2g]CB)

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 14 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Transient NPSH Study E12.5.1296 Suizer Pumps (US) Inc Revision 1, 10/05/2006 "NPSH-Recommended" calculation results are tabulated below. The calculation set (2000, 3000, 3750 & 4500 gpm) is collected in Appendix A.

Flow NPSH 2000 gpm 64.1 feet 3000 gpm 41.9 feet 3750 gpm 43.4 feet 4500 9pm 85.9 feet Table 3: "Recommended NPSH" A sample "NPSH-Recommended calculation follows:

"NPSH RECOMMENDED" CALCULATION Q =

2 (GPM) From performance curve QBEP =

3 (GPM) From performance curve Q/QBEP =

SN =

J {NPSHR -0% / NPSHR-3%} = Function of Q/QBEP SEN =

Function of pumpage and NPSHR(3%)

ST =

0 Function of temperature and NPSHR(3%)

SM =

Function of impeller material and pumpage SLG =

I (deg.)

SLG = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Nss(3%) =

1 Suction specific speed at 3%

Nss(REF) =

9300 Suction specific speed at reference Fs =

1

{sqrt(N.8(3%) / Ns(REF))} for water if N,,(3%) > 9300 = NSS(REF)

NPSH,(3%/)

=

2 (ft)

From performance curve FCT = 1 FCT? 1.0; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/FcT to allow for Casting and measuring Tolerances.

FCT = 1.0 In this study NPSHREc =

(ft)

NPSHREG = SN X Sg x Sr X Sm X SLG X F. x NPSHR(3% ) x FcT

References:

Hydraulic Review. E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 15/36 August 14, 2006

SULZER August 14, 2006 Sutw Pumps (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 Results of both the "NPSH-Recommended" and "Cavitation Free" calculations, as well as the test curves for 1% and 3% head and drop, are plotted on Curve CS II:

SULZER STANDARD CLEARANCES CS 11 i

[

1 i

220

- -+-I-i~-V~--4T'~'K

.200

~180

}

fCATtI FREE+ NPS"I' j

J-f j-160 i

I

\\.tV i !P! I I [- I H-[

-1 f4_

140-.1 9E4MM Et iH r

1 V

+

{-

80

___ _L__

,*---,.,+

-]!_-

460 120

-f

2 0

1000 2000 3000 4000

,,,,,,,,,5000 6000 7000 GALLONS PER MINUTE TV ERSULZER

"°"12 x 16 x 14.5 CVDS 1 STAGE ALABAMA

.ILS 14 50" m^ *W*,ER

=*

P 3580 RPM j P4.OeXAT~

IiMP CORESPRAY PUMPS USA.21417T-Fl EYEAAIAS=N

,'i.ENOE 2 3CVDS-4

c. ¢ S_ 0 0- 270O71lJF2 E&3t-21417-C$

Js~cD?

3'+-A.U-Ce 61 AVG PERF CS II i.,

Curve 5: CS Test and Calculated NPSH "Recommended" NPSH (as plotted) is Sulzer's theoretical recommendation for 40,000 hour0 days 0 hours 0 weeks 0 months life, based on limited cavitation damage to the impeller.

o Comparison to the "cavitation free" curve (Lobanoff & Ross) shows that some cavitation occurs at the "recommended" NPSHr. The slight erosion damage that occurs at this level is the basis for 40,000 hour0 days 0 hours 0 weeks 0 months criterion.

NPSHr curves based on 1% and 3% head loss are from development tests of these impellers, and represent the standard (Hydraulic Institute) method for determining NPSH; o The same comparison as above demonstrates that slight cavitation will occur at these NPSH values.

16 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 0.01 35-30--

0.1 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 10 1

100 1000 8000 i

,,,I, I

I

,i I

I -J I.

.l-4I, 2:

NPSHr vs Operational Life Core Spray Pumps [CS]

12 x 16 x 14.5 CVDS Q 3580 rpm Typical Browns Ferry NPS ITI I

- -~--~

M( 1

-~

~-4-,--~ -- I-U-

C/)

a-Z cI)

Q-3125 0-4125 I 25 z

20 -

0.01 I

2n 0.1 1

10 100 Operating Hours Curve 6: CS NPSHr vs. Operating Life 1000 8000 18/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 hours 1

10 0.01 0.1 100 1000 8000 LL

-l)a.Z ci, ci) 20-f-0.01 0.1 1

10 100 Operating Hours Curve 6: CS NPSHr vs. Operating Life 1000 8000 18/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 CS Results and

Conclusions:

The subject pumps have been analyzed and found to be suitable for reduced NPSHa operation, as described above, with equipment in "as new" condition.

Curve 6 provides a guideline for operational life vs. NPSHa as a general recommendation for operation when the pumps may be subject to transient events outside of their original scope.

Recommendations are also provided specifically to address the potential transient events provided by TVA Browns Ferry:

o Both potential LOCA events (as tabulated) provide NPSHA values above the minimum established NPSHr (as established in the operating life graph) and are acceptable - i.e. they meet the criteria for determining operational life vs.

NPSHa from the graph (curve 6).

Analysis methodology compared test derived NPSHr values with those predicted theoretically. The pumps were evaluated against this comparative basis in order to predict the remaining operational life of a pump in the aftermath of a transient event; o

An 8000 hour0.0926 days 2.222 hours 0.0132 weeks 0.00304 months post-transient operational lifetime was developed, based on similar cavitation damage to the 40,000 hour0 days 0 hours 0 weeks 0 months "recommended" NPSHr curve; the curve is well supported by the NPSH analysis and mechanical response on the test stand; o Graphical NPSHa levels and duration are less severe than that actually experienced on the test stand; o Empirical test information has been verified by one of the original test Engineers; o

Despite NPSH testing that was more severe than the "recommended" curve, post-test inspection revealed no damage.

When pumps are in an "undamaged" condition they can be operated in accordance within the NPSHA guidelines provided with the expectation of the 8000 hour0.0926 days 2.222 hours 0.0132 weeks 0.00304 months life described.

The tabulated transients are acceptable scenarios within the operating recommendations established in curve 6:

o Although vibration and noise may increase as a result of the transients, the units should continue pumping; o

Any non-detrimental impeller wear will be in accordance with the operational life graph.

19/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.i296 Revision 1, 10/05/2006 APPENDIX A - TEST DATA AND CALCULATIONS 20 /36 August 14, 2006

SSULZER August 14, 2006 SU ZE R

us IU Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 RHR Performance Curve:

r-1OWU,T

gT Err,%

90

0 70

.9 50 Ii I

401cý 30 20 10 0

GSAL.OIn PER MkIT9 Wt1¶I%4QrS ~tPMI e

C~evaý r %

QýY*

8INGHAMA PUMIP ý:Co M

Customer Curve 27872: Typical RHR Witness Test Performance Curve RHR NPSH TEST Data:

RHR NPSH test data is tabulated as follows:

Test Flow NPSH For Various Head Losses Comments 1% Loss 3% Loss 6% Loss 270685-A 7,512 30.0 ft.

15.6 ft.

Untested Test stopped at 15.6 feet NPSH-10,015 30.3 ft.

23.4 ft.

23.2 ft.

7512 gpm drop still only 2.3%.

270685-8 5,004 34.0 ft.

19 ft.

Untested Test stopped at 19 feet NPSH -

10,009 37.0 ft.

28.5 ft.

20.8 ft.

5004 gpm drop still only at 2.7%.

270685 5,000 34.2 ft.

19.5 Untested 5000 - 2.5% drop at 19.5 feet.

7,505 31.0 ft.

15.9 ft.

Untested 10,000 31.5 ft.

20.8 ft.

20 ft.

12,000 47.5 ft.

40.7 ft.

36.2 ft.

21/136 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 CS Performance Curve:

H. i.v :.....

! ii FI 7

71 i

7--7 7.

.1' IlI i!.I

.111~~

cc m ft) cD.crR15tc. CUR~r wrxrr t4 S

U~

SV.E BINGHAM PUMP CO.

r i3s eR, P.M Customer Curve 27379-B: Typical CS Witness Test Performance Curve CS NPSH TEST bata:

CS NPSH test data is tabulated as follows:

Test Flow NPSH For Various Head Losses Comments 1% Loss 3% Loss 6% Loss 270427 3,110 21.3 ft.

21.2 ft.

21.0 ft.

Sharp knee @ 3110. NPSHr must 4,510 43.0 ft.

31.5 ft.

26.0 ft.

be above knee.

270427 2,013 30.0 ft.

23.0 ft.

Untested Test stopped - 1.6% @ 23 feet.

22/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 RHR Cavitation Free NPSH Calculations:

"CAVITATION FREE" NPSHr CALCULATION Q

=

0 (GPM)

Flow.

N =

1 (rpm)

A-B = j (in 2

O Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AE =

1 (in 2"

Impeller eye area.

B, =

11 (deg.) Blade inlet angle.

(A-B)/A5

=

2

(%)

Area ratio (From Lobanoff and Ross).

K, =

1 From Lobanoff & Ross Figure 8-18.

D, =

5 (in.)

Impeller eye diameter C

=

4 (ft./sec.) Average meridianal velocity at blade inlet (.3 2 1Q/AE).

UT =

1 7 (t./sec.) Peripheral velocity of impeller blade (DTN/

2 29).

Tan(9) =

0 Impeller inlet velocity ratio (CM1/UT)"

8 =

4 (deg.) Angle of flow approaching blade.

a =

(deg.) Angle of incidence (B,-theta).

K2

=

0.476 From Lobanoft & Ross Figure 8-19.

Cs

=

.931 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 {[(K,+K 2)CM1 2/2g + K2UT 2/2g]Cse

References:

Lobanoff & Ross, Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 RHR PUMP @5000 GPM "CAVITATION FREE" NPSHr CALCULATION Q

=

7 (GPM)

Flow.

N =

7 (rpm)

A-B

=

O (in

2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AE =

1 (in

2)

Impeller eye area.

B,

=

11 (deg.) Blade inlet angle.

(A-B)/AE =

2 1%)

Area ratio (From Lobanoff and Ross ).

K, =

1 From Lobanoff & Ross Figure 8-18.

D, =

5 (in.)

Impeller eye diameter Cm,

=

1 (ft./sec.) Average meridianal velocity at blade inlet (.321Q/AE).

UT =

1 (ft/sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(G)

=

1 Impeller inlet velocity ratio (CM,/UT) 8 =

6 (deg.) Angle of flow approaching blade.

o =

4 (deg.) Angle of incidence (Bl-theta).

K2 =

3 From Lobanoff & Ross Figure 8-19.

C,

=

From Lobanoff & Ross Figure 8-20.

NPSHr = jJ7.3 (ft.)

Lobanoff&Ross equation 8-2 )[(K,+K 2)CM12/2g + K2UT 2/2g]CB}

References:

Lobanoff & Ross, 'Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 RHR PUMP @ 7000 GPM 23 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study El 2.5.1296 Revision 1, 10/05/2006 "CAVITATION FREE" NPSHr CALCULATION a

N A-B AE B,

(A-B)/AE K,

Dt CM1 UT Tan(O) 0 a

K, C8 NPSHr

=

9 (GPM)

Flow.

N=

1 (rpm)

=

3 (in

2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

=

1 (in

2)

Impeller eye area.

=

1 (deg.) Blade inlet angle.

ABA = 2 8

(%)

Area ratio (From Lobanoff and Ross).

K=

1 From Lobanoff & Ross Figure 8-18.

=

15.25 (in.)

Impeller eye diameter

=

1 (ft./sec.) Average meridianal velocity at blade inlet (.

3 2 1Q/AE).

=

1 (it./sec.) Peripheral velocity of impeller blade (DTN/229).

=

0 Impeller inlet velocity ratio (CM,/UT)

=

8 (deg.) Angle of flow approaching blade.

=

3 (deg.) Angle of incidence (B-theta).

K=

0 From Lobanoff & Ross Figure 8-19.

=

03 From Lobanoff & Ross Figure 8-20.

=PS r 21 (ft.)

Lobanoff&Ross equation 8-2 {[(K,+K 2 )Cm, 2

/2g + K 2 UT 2

/2g]CBI

References:

Lobanoft & Ross, "Centifugal Pumps: Design & Application' 2nd Edition, Gulf Publishing, 1992 RHR PUMP @ 9000 GPM "CAVITATION FREE" NPSHr CALCULATION a =

1 (GPM)

Flow.

N =

1 (rpm)

A-B

=

3 (in2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AE =

1 (in 2 1 Impeller eye area.

B, =

11 (deg.) Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lobanoff and Ross ).

K,

=

1 From Lobanoff & Ross Figure 8-18.

D, =

1 (in.)

Impeller eye diameter CM, =

1 (ft./sec.) Average meridianal velocity at blade inlet (.

3 2 t0/AE).

U 1

=

1 7 (ft./sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(e)

=

0 Impeller inlet velocity ratio (CG l/UT) 0

=

7 (deg.) Angle of flow approaching blade.

a =

4 (dog.) Angle of incidence (Bl-theta).

K2 = F031 From Lobanoff & Ross Figure 8-19.

c. = F0.93 From Lobanoff & Ross Figure 8-20.

NPSHr =

1 (ft.)

Lobanoff&Ross equation 8-2 {[(K,+K 2)C.,i/2g + K2UT 2/2g]Cs) eleerences: Lobanoff & Ross, "Centilugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 RHR PUMP @ 10500 GPM 24 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Puns (US) Inc Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 "CAVITATION FREE" NPSHr CALCULATION a

=

2 (GPM)

Flow.

N =

1 (rpm)

A-B

=

08 (in 2

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

A0

=

l (in 2"

Impeller eye area.

B, =

1] (deg.) Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lobanoff and Ross).

K, =

158 From Lobanoft & Ross Figure 8-18.

D=

152 (in.)

Impeller eye diameter Cm,

=

2 (ft./sec.) Average meridianal velocity at blade inlet (.3210/AE).

UT =

1 (ft./sec.) Peripheral velocity of impeller blade (D-rN/229).

Tan(9) =

1 Impeller inlet velocity ratio (CMI/U1 T).

9

=

1 (deg.) Angle of flow approaching blade.

a =

0 (deg.)

Angle of incidence (B,-theta).

K2 = F 03 From Lobanoff & Ross Figure 8-19.

c

=

93 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanotf&Ross equation 8-2 {[(K,+K 2)CMI'/2g + K2U-2/2g(CB}

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 RHR PUMP @ 12000 GPM 25 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (uSI In Transient NPSH Study E12.5.1296 Revision 1, 10/05/2006 CS Cavitation Free NPSH Calculations:

"CAVITATION FREE" NPSHr CALCULATION Q

=

2000 (GPM)

Flow.

N =

5 (rpm)

A-B

=

1 (in2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

A5

=

8 (in 2

)

Impeller eye area.

B,

=

6 (deg.)

Blade inlet angle.

(A-B)/A,

=

2

(%)

Area ratio (From Lobanoff and Ross).

K,

= F 148 From Lobanoff & Ross Figure 8-18.

D, =

8 (in.)

Impeller eye diameter Cm,

=

1 (ft./sec.) Average meridianal velocity at blade inlet (.3210/AE).

UT =

1 (ft/sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(8)

=

0 Impeller inlet velocity ratio (CMI/UT) 8 =

5 (dog.) Angle of flow approaching blade.

S=

11 (deg.) Angle of incidence (B,-theta).

K2

=

7.93 From Lobanoff & Ross Figure 8-19.

ca =

0.93 From Lobanoff & Ross Figure 8-20.

NPSHr =

(it.)

Lobanoff&Ross equation 8-2 ([(Kr+K2)Cm,2/2g + K2UT 2/2g]CB)

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 CS PUMP @ 2000 GPM "CAVITATION FREE" NPSHr CALCULATION o =

3 (GPM)

Flow.

N =

3 (rpm)

A-B

=

2 (in 2l Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AE =

6 (in2)

Impeller eye area.

B,

=

1 (deg.) Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lobanoff and Ross ).

K, =

14 From Lobanoff & Ross Figure 8-18.

0,

=

6 (in.)

Impeller eye diameter Cm,

=

1 (ft./sec.) Average meridianal velocity at blade inlet (.321Q/AE).

UT =

1 (ft./sec.) Peripheral velocity of impeller blade (DTN/

2 2 9).

Tan(0)

=

0 Impeller inlet velocity ratio (CM/UT) 8 =

8 (deg.)

Angle of flow approaching blade.

o 7.9 (deg.) Angle of incidence (B.-theta).

K2

=

0 From Lobanoff & Ross Figure 8-19.

=

9 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 {[(K,+K 2)CM1 2/2g + K2UT 2/2g]C,}

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 CS PUMP @ 3000 GPM 26 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 "CAVITATION FREE" NPSHr CALCULATION a =

35 (GPM)

Flow, N = F 580 (rpm)

A-B

=

J (in2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

A5

=

6 (in

2)

Impeller eye area.

B

=

1 (deg.) Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lobanoff and Roas ).

K,

=

1.48 From Lobanoff & Ross Figure 8-18.

D, =

6 (in.)

Impeller eye diameter CM1 =

1 (ft./sec.) Average meridianal velocity at blade inlet (.321Q/AE).

UT =

1 (ft./sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(G)

=

0 Impeller inlet velocity ratio (CMI/UT).

0

=

1 (deg.) Angle of flow approaching blade.

a

=

5 (deg.) Angle of incidence (B,-theta).

K2 =

-. 46 From Lobanoff & Ross Figure 8-19.

C.

=

o.93 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 {[(K,+K 2)Cm1 2/2g + K 2UT 2/2g]CS)

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 CS PUMP @ 3750 GPM "CAVITATION FREE" NPSHr CALCULATION a

=

4 (GPM)

Flow.

N =

3 (rpm)

A-B

= Eijj2Jjl (in

2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AE =

6 (in

2)

Impeller eye area.

B, =

1 (deg.) Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lobanoff and Ross ).

K,

= F

.48 From Lobanoff & Ross Figure 8-18.

D, =

8 (in.)

Impeller eye diameter Cm,

=

(ft./sec.) Average meridianal velocity at blade inlet (.321Q/AE).

UT =

1 (ft./sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(O) =

0 Impeller inlet velocity ratio (CM1/UT)"

8

=

1 (deg.) Angle of flow approaching blade.

o

=

8 (deg.) Angle of incidence (B,-theta).

K2 =

0 From Lobanoff & Ross Figure 8-19.

C.

=

0.93 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 {[(Kj+K2)CM1 2/2g + K2UT 2/2g]CB)

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 CS PUMP @ 4500 GPM 27 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 RHR Recommended NPSH Calculations:

"NPSH RECOMMENDED" CALCULATION Q

QBEP QI0EP SN SEN ST S.

SLG Nss(3%)

Nss(REF)

NPSHB(3%)

Fcr

=

86'00 (I*

=Z2

=LZ GPM)

GPM)

From performance curve From performance curve

)NPSHR - 0% / NPSHR-3%} = Function of Q/QaEp Function of pumpage and NPSHe(3%)

Function of temperature and NPSH,(3%)

Function of impeller material and pumpage deg.)

SLG = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLQ - 1.0 at min, flow and runout flow (40.000 hour0 days 0 hours 0 weeks 0 months are not required)

Suction specific speed at 3%

Suction specific speed at reference jsqrt(N,,(3%) / N.(REF))) for water if Nýý(3%) > 9300 = N,,(REF)

(ft)

From performance curve Fcr ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/F-T to allow for Casting and measuring Tolerances.

FCT 1.0 In this study (ft)

NPSHSEc = SN X SEN X ST a Sm X SLa x F, x NPSHR(3%) x FCT NPSHAEC

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008,002 pages 1 - 5 RHR PUMP @5000 GPM "NPSH RECOMMENDED" CALCULATION 0/0 8EP SEN SBý Nss(3%)

Nss(REF)

Fs NFSH5)2%)

F.,

=

00 (GPM)

F 600 (GPM)

S0.8141

=(e.

= iiI* i (deg.)

From performance curve From performance curve

{NPSHR - 0% / NPSHR3%) = Function of Q/QBEP Function of pumpage and NPSHn(3%)

Function of temperature and NPSHR(3%)

Function of impeller material and pumpage SLG = 1.2 ; Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

= 9 =LI Suction specific speed at 3%

Suction specific speed at reference

{sqrt(N..(3%) / N,.(REF))( for water if Ný.(3%) v 9300 = N,(REF)

(tt)

From performance curve FcT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/F5, to allow for Casting and measuring Tolerances.

F5T = 1.0 in this study (ht)

NPSH,

= SN X SEN X ST X S, X S LG x F. x NPSHR(3%) x FCT NPSHREC

=

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 RHR PUMP @ 7000 GPM 28 /36 August 14, 2006

S

""'=

IAugust 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 "NPSH RECOMMENDED" CALCULATION Q

=

9 (GPM) From performance curve GnEP SW SEN ST SM SLG Nss(3%)

Nss(REF)

F, NPSHs(3%)

=

-86001

=

11

=

71.2 F

-13390

=

9300

=

91.199

=E7Z1 GPM)

From performance curve

{NPSHR - 0% / NPSHR-3%1 = Function of Q/QBEP Function of pumpage and NPSHe(3%)

Function of temperature and NPSHR(3%)

Function of impeller material and pumpage deg.)

SO = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLO = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Suction specific speed at 3%

Suction specific speed at reference (sqrf(N.,(3%) / NA(REF))) for water if N.(3%) > 9300 = Ns.(REF)

(ft)

From performance curve FCT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by I/FcT tO allow for Casting and measuring Tolerances.

FCT = 1.0 In this study (ft)

NPSHEEc = SN X SEN X STX S, X SLW x F. x NPSHR(3%) x FCT N P SH. I

=F-3 9

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 RHR PUMP @ 9000 GPM "NPSH RECOMMENDED" CALCULATION 0 =

1 (GPM)

From performance curve QOEP =

8600 (GPM)

From performance curve Q/QnEP =

SN =

{NPSHR - 0% / NPSHR-3%} = Function of Q/Q8EP SEN = E

.1 Function of pumpage and NPSHR(3%)

ST

= F 0.9 Function of temperature and NPSHR(3%)

s.

=

1 Function of impeller material and pumpage SLG =

(deg.) S._G = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Nss(3%)

=

1 Suction specific speed at 3%

Nss(REF) = F930 Suction specific speed at reference FI =

9

{sqr1(N..(3%) / N.,(REF))) for water if N.(3%) > 9300 = Ns_(REF)

NPSHR(3%) =

2391 (ft)

From performance curve FCT =

f FCT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/FCT to allow for Casting and measuring Tolerances.

FCT = 1.0 In this study NPSH.cE

=

(fl)

NPSHRsc = SN X SIN X STX S X SL. x F, x NPSHR(3%) x FCT

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 RHR PUMP @ 10500 GPM 29 /36 August 14, 2006

SULZER August 14, 2006 Suriw Pumps (US) In Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 "NPSH RECOMMENDED" CALCULATION 0 =

1 (GPM)

From performance curve QOEP = r 600 (GPM)

From performance curve 0/lsEP =

SN =

1.74

{NPSHR - 0% / NPSHn-3%} = Function of Q/QBEP SEN = F 1.2 Function of pumpage and NPSHR(3%)

ST = r 098 Function of temperature and NPSHe(3%)

S.

= F[ 1 Function of impeller material and pumpage SL= = F1f (deg.) S,. = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Nss(3%) =

1 Suction specific speed at 3%

Nss(REF)

=

9300 Suction specific speed at reference Fs

=

9

{sqrt(N,,(3%) / N,,(REF))} for water if N.(3%) > 9300 = N.,(REF)

NPSHR(3%)

=

4-0 (f)

From performance curve FOT = j Fc0 ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by i/F 0T to allow for Casting and measuring Tolerances.

Fcr = 1.0 In this study NPSHREc

=

(ft)

NPSHREc = SN X SEN X ST X S, X SLG X F. x NPSHR(3%) x FCT

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 RHR PUMP @ 11500 GPM 30 /36 August 14, 2006

August 14, 2006 SULZER Transient NPSH Study E12.5.1296 Sulzer Pumps (LIS) Inc Revision 1, 10/05/2006 CS Recommended NPSH Calculations:

"NPSH RECOMMENDED" CALCULATION 0

OBEP SN SEN ST SM SL.G Nss(3%)

Nss(REF)

Fs NPSHR(3%)

FCT

=

20 (GPM)

=

3000 (GPM)

=

1-.6

= -F1.6

=

0--96

= El (deg.)

=

1 5389

=

28.

(11)

From performance curve From performance curve

{NPSHR - 0% 1 NPSHR-3%} = Function of Q/QsEp Function of pumpage and NPSHI(3%)

Function of temperature and NPSH0 (3%)

Function of impeller material and pumpage SLG = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLW = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Suction specific speed at 3%

Suction specific speed at reference

{sqrt(N,.(3%) / N,,(REF))) for water it N,.(3%) > 9300 = N,.(REF)

From performance curve FCT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by I/FcT to allow for Casting and measuring Tolerances.

FCT = 1.0 In this study NPSHREc = SN X SEN X ST X S, X SLG x F, x NPSHR(3%) x FCT NPSHRc

=

ft)

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 CS PUMP @ 2000 GPM "NPSH RECOMMENDED" CALCULATION a =

3 (GPM)

From performance curve QBEP Q/OBEP SN SEN ST Sm SLG Nss(3%)

Nss(REF)

Fs NPSHR(3%)

FCT

= F-71 F-5981

=7I2-1 E-21.51 GPM)

From performance curve (NPSH5 - 0% / NPSHR-3%} = Function of QOOsEP Function of pumpage and NPSHR(3%)

Function of temperature and NPSHR(3%)

Function of impeller material and pumpage deg.) S,. = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLO = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Suction specific speed at 3%

Suction specific speed at reference

{sqrt(Ns.(3%) / N.,(REF))) for water if N_,(3%) > 9300 = Ns(REF)

(ft)

From performance curve FC7 ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/FO-to allow for Casting and measuring Tolerances.

FOT = 1.0 In this study (ft)

NPSHREc = SN X SEN X STX Su X SLG x F, x NPSHR(3%) x FCT NPSHREO

=

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 CS PUMP @ 3000 GPM 31/36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumlp UIS)

Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 "NPSH RECOMMENDED" CALCULATION a =

3 (GPM)

From performance curve Q

=

3000 (GPM)

From performance curve QIQBEP

=

15 SN

= 1

)NPSHR - 0% / NPSHR-3%) = Function of Q!QBEP SEN

= F 1.1 Function of pumpage and NPSH,(3%)

ST =

0 Function of temperature and NPSHR(3%)

S.

= [

Function of impeller material and pumpage SLG = E (deg.)

SLO = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLn = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Nss(3%) =

3 Suction specific speed at 3%

Nss(REF)

=

93o0 Suction specific speed at reference Fs

=

1

{sqrt(N,,(3%) / N,,(REF))} for water if N,,(3%) > 9300 = N,,(REF)

NPSHR(3%)

=

(ft)

From performance curve FCT =

l FCT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/FCT to allow for Casting and measuring Tolerances.

FT = 1.0 In this study NPSHREc

=

(ft)

NPSHREC 5

SN x SEN X STX S, X SLG x F, x NPSHR(3%) x Fc-,

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 CS PUMP @ 3750 GPM "NPSH RECOMMENDED" CALCULATION Q =

5 (GPM) From performance curve QBEP =

3000 (GPM) From performance curve 0/iQEP

=

s, =

.931 NPSHR - 0% / NPSHR-3%) = Function of Q/QrEP SEN

= F f8 Function of pumpage and NPSHn(3%)

ST = F 098 Function of temperature and NPSHR(3%)

S.

E Function of impeller material and pumpage SLn

(deg.) SLG = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Nss(3%) =

3 Suction specific speed at 3%

Nss(REF)

= F930 Suction specific speed at reference Fs

=

2

{sqrt(N,.(3%) / N,,(REF))) for water if N,,(3%) > 9300 = N,0(REF)

NPSHR(3%)

=

31.

()

From performance curve FCT =

F* ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/FT to allow for Casting and measuring Tolerances.

FCT = 1.0 In this study NPSHnEc

=

(ft)

NPSHRE 0

= SNX SEN X STX S, x SýSGX F,* NPSHs(3%) xFCT

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 CS PUMP @ 4500 GPM 32 /36 August 14, 2006

SULZER*

August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 APPENDIX B - PUMP CROSS SECTIONS 33 /36 August 14, 2006

SULZER August 14, 2006 SuLter Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10105/2006 RHR Pump Cross Sectional Drawing:

0 0

(~c j

cxm~

Li.i Sulzer Drawing D27358: RHR Pump Cross Sectional Drawing 34 /36 August 14, 2006

SULZER August 14, 2006 Transient NPSH Study E12.5.1296 Sulzor Pumps (USI) IRn0 Revision 1, 10/05/2006 CS Pump Cross Sectional brawing:

r 4

a

/

~I 7<

<'-V

>7 7

/

a Sulzer Drawing Z6315: CS Pump Cross Sectional Drawing 35 /36 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Revision 1, 10/05/2006 SULZER DOCUMENT REVISION RECORD Pump Serial Number: Peoort no. !-1 2.5.12"95 FRev.

Issue ECR No.

Date No.

Location Description (WEýld,nqIglneringssist~nc# bequest No.)

(Parts I RFpaeir Order No.)

By'Appr.

1 10:0D52006 140535 pp. 11112 RHR

Conclusion:

Distinguished between "non-detrimental Impeller wear" and "detrimental I

damage".

SJS'DS S

1a-0D52006 140535 Page 19 CS

Conclusion:

changed "damage" to "non-detrimental Impeller wear".

SJSDS Page 1 of 1

DOC REV.D 36 /36 August 14, 2006

ENCLOSURE 2 TENNESSEE VALLEY AUTHORITY BROWNS FERRY NUCLEAR PLANT (BFN)

UNITS 1, 2, AND 3 TECHNICAL SPECIFICATIONS (TS)

CHANGES TS-431 AND TS-418 -

EXTENDED POWER UPRATE (EPU)

NPSH REQUIREMENTS -

PUMP VENDOR REPORT (TAC NOS. MC3812,

MC3743, AND MC3744)

NPSH TRANSIENT STUDY, REV.

0 (Draft)

SULZER QUALITY LEVEL 13 Direct a

Indirect SULZER PUMPS (US) INC. DOCUMENT DOC. NO:

E12.5.1296 ORDER NO:

E-001-21417 TITLE:

NPSH Transient Study RHR and Core Spray Pumps ASME CODE SECTION CLASS NO.

CODE EDITION (YEAR)

SEASON YEAR x\\

CUSTOMER TVA 467>d PROJECT Browns Ferry NPS I U

CUSTOMER P.O. NO.

SPECIFICATION NO.

CUSTOMER APPROVAL NUMBER:

SPACE FOR CUSTOMER APPROVAL STAMP (when applicable/available)

RACT NUMBER CUSTOMER APP

UIREMENT El Yes

API, 13 Information Only CERTIFIED.*0%,

ULZER PUMPS (US) INC. DOCUMENT 13 Fo endo 13 Risk Release Inspection t

ufacture at u zer Pumps (US) Inc.

0 Other (specify)

PPROVALS (SIGNATURE)

Date Engineering 9/13/06 I

pt CE RTIFICATION lhgnp)[cable)

This Document i~frertifdl be in compliance with TH EE PURCHASE ORDER, SPECJ ATIO OCEDURES, AND ADDITIO hQUIREMENTS LISTED IN THE APPENDICES.

Professional Engineer Originating Advance Engineering Dept:

By:

Steven Schoenbrun

Title:

Project Engineer Initial 9/13/2006 Date:

APPLICABLE S.O. NUMBERS:

E12.5.1296 FRev.

DOCUMENT IDENTIFICATION State Registration No.

Date

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump PURPOSE: To review existing pumps to determine if they are capable of meeting new transient NPSHa conditions and estimate the expected pump life based on 8000 hours0.0926 days 2.222 hours 0.0132 weeks 0.00304 months and limited NPSH values. Minimum flow evaluation is not a requirement of this study.

KNOWN: The existing pumps are RHR [Residual Heat Removal] and CS [Core Spray]

SULZER serial numbers: 50270671/82 and 50280253/64. Pumps were originally supplied to General Electric Company.

RHR pumps [50 270671/82] are SULZER model 18x24x28 CVIC:

o Pumps are single suction vertical inline type with welded inlet a tI connections; 6

o Units are rated 10000 gpm @ 560 feet on ambient wate o

Electric motors are rated 2000 hp @ 1785 rpm on 400 3%/Hertz power; o

Estimated weight is 20000 lbs with a height of 15 Wom the foundation.

Construction Features are as follows:

o Cross Section D27358 with parts list; o

Pump case is carbon steel; o

Pump rotor is chrome steel and the imn a s integral wear rings; o

Pump shaft is connected to the el r via a rigid coupling; o Pump thrust is taken in the dri Available information and test d2735 Certified performan t

2, 27935, 27811, 27936, 27801-04, 28267 and 28941-43; o

Internal SULZER tests 'information and development, note these are not available for publi##ion; o

Original

%t~ecords have been lost or archived at a site unknown at present; o

Existing' *odl imited to internal hardcopies and microfiche; o

One

"*ginal test engineers is still with SULZER in a similar capacity.

Core 5s

[SO 280253/64] are SULZER model 12x16x14.5 CVDS:

0

are double suction vertical inline type with welded inlet and outlet nections;

" r~nits are rated 3125 gpm E 582 feet on 210 degree F water; o

Electric motors are rated 600 hp @ 3580 rpm on 4000/3/60 Hertz power; o Estimated weight is 8730 lbs with a height of 112 inches from the foundation.

Construction Features are as follows:

o Cross Section Z6315 and parts list; o

Pump case is carbon steel; o

Pump rotor assembly is chrome steel and the impeller has integral wear rings; 0 Pump shaft is connected to the electric motor via a rigid coupling; o

Pump thrust is taken in the driver; 2/35 August 14, 2006

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump Available information and test data; o

Certified performance tests 27376B-79B, 27970-73 and 28022-25; o Internal SULZER tests for information and development, note these are not available for publication; o

Original test records have been lost or archived at a site unknown at present; o

Existing records limited to internal hardcopies and microfiche; o

One of the original test engineers is still with SULZER in a similar capacity.

Both RHR and CS pumps are being evaluated for their response to potential j!nt conditions that may occur due to various system scenarios. TVA Browns provided system transient scenarios; data includes flows, times an v

PSHa data for both the RHR and Core Spray Pumps, as follows:

Event Duration RHR Pump Flow Rl-X-*

Pump CS Min A0 Flow NPSHA ST-LOCA

<10 mnin 11500 gpm (broken 4125 gpm 26.5 ft 10500 gpm (int ft LT-LOCA

>10 min to 24 hrs 6500 gpm 8.5 ft 3125 gpm 35.1 ft ATWS 8 hrs 6500 gpm*

24.3 ft none none APP P.

60 hrs 9000 g 26.9 ft none none SBO 24 hrsP I*65004pX 32.2 ft none none Table 1: P lent Events Methodology (RHR & CS Pu Z. ): This study utilizes empirical and theoretical NPSHA/R data and calculatioj *lmakd'NPSHr recommendations for transient responses.

For both RHR d& C st and order related data/information was collected for evaluation:

K o Al tests were collected; abdevelopment/model test results were located and copied; Jct test records/notes were collected; dividual Bill of Materials were copied;

=ield records were assembled.

As a basis for evaluation, certified witness test performance curves, for both pump sets, were averaged to produce an "average performance" for each pump type. Development test data was used to create NPSHr curves, at 1% and 3% head loss, for both models.

Theoretical NPSHr calculations utilize Sulzer's current standard for recommended (40k hours at BEP) NP5Hr and "cavitation free" NP5Hr from "Centrifugal Pumps: Design &

Application", 2nd Edition, Lobanoff At Ross, Gulf Publishing, 1992.

3/35 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump Minimum NPSHa vs. NPSHr evaluation is accomplished by plotting/comparison of calculated and empirical NP5H data to determine hydraulic/mechanical implications of transient events.

Technical Background for Analyzing NPSH test data: To evaluate the response of a pump to a transient event, and make a meaningful prediction for post event operating life, the behavior of the pump in the NPSH "knee" must be thoroughly understood.

NPSH performance assessments are related to the knees of the plotted NPS ata. Plots of NPSH vs. head (from NPSH test data) as the NPSH is reduced incremenI lyl m ample suction pressure, will show that the head responds by staying corl*n ing or dropping:

va o The "knee" is the area on an NPSH test curve where th, rades more rapidly before falling off totally.

The shape of an NP5H knee is an important factor in rec e

minimum NPSHr values. A knee may have a sharp or more rounded pro a

with its own implications:

o When the knee is sharp, various head dr parisons (1%, 3%, 6%, etc.) occur at about the same NPSH value.

o Operation near a sharp kne*c*omnmended.

o In a well-rounded knee the var*

he drop comparisons occur over a wider range of NPSH values. The i e of response allows operating recommendations wit NPSH data for both pump models i development testing. Aspects of data collection include:

o Several tet ointare required to define a knee.

o Occasio I* est stand limitations do not allow suppression to a low enough NPSH to

'p ly define the knee - i.e. the 3%, 6%, drop-off points may not be c

test. Under some conditions these tests can still be used to e*

~eptable operation in response to a transient event.

the head remains stable below the minimum proposed transient event NPSHA, the test is still a good validation tool - i.e. while the head may not have degraded enough to define the knee,in response to a lowering of the NPSH (a true "knee" has not been established), the stable head response shows that the pump is suitable for operation.

Modeling from similar pumps is another long established pump industry method with a basis in ANSI/Hydraulic Institute, ASME and other standards. Size factored NPSHr values (from models of similar pumps) are commonly used to make NPSH recommendations.

o Modeling has not been used in this study.

4/35 August 14, 2006

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH StudyI E12.5.1296 Pump RHR Pump NPSH Assessment and Analysis: Test and calculated NPSH values are analyzed and compared against the proposed transient events.

Performance curves 27935, 27811, 27936, 27801-04, 28267 and 28941-43 have been averaged relative to head and efficiency vs. flow and plotted as curve RHR I. For the basis of NPSH assessment, test points for NPSHR-3% and NPSHR-1% (4 capacities) have also been plotted on curve RHR I based on development testing (NPSH test data has been tabulated in Appendix A).

Specific speed (Ns) and Suction Specific Speed (Nss) for both 3% andI are as follows:

o N5

= 1785*8600'/2/6563/4=1277 o

N 5 3% = 1785*86001/2/163/4= 20692 o

Nssl% = 1785*86001/2/29.53/4=13077 e

_,c, SULZER STANDARD CLEARANCES AfVg1 100 I-Iiw U-2 601 404 201:

I-- I---------1

[

C NPSHt I, TIMP RHRI 80 70 *

-U 50*_2 LU 40 30 3000 20 20CC

-r 10 100C a0 2000 4000 6000 8000 GALLONS PER MINUTE 10000 12000 14000 TVA FS.

18X24 X 28 CVIC 1 STAGE BROWNSAA 2750' c",--=

[

1785FRPMR ALABAMA SU Z R5.8`

V 5EL RP-26.8-185Rp RrR PUMPS USA.21417-Fl 2N mA, 2 1N l3CVIC 17 O NO: 277B71t'2 E311-2!417-C SJS:C.'ýM I AJG-Oe 169.3 AVG PERF RHRI Curve 1: RHR Average Performance 5/35 August 14, 2006

SULZER August 14, 2006 Su LZr Eur (US) Inc Transient NPSH Study E12.5.1296 Suizr Pmps US)IncPump Results of the "Cavitation Free" NPSHR calculation (based on Lobanoff and Ross) are as per the following table.

Flow NPSH 5000 gpm 96.5 feet 7000 gpm 75.3 feet 9000 gpm 71.2 feet 10500 gpm 74.1 feet 12000 gpm 75.3 feet Table 2: RHR "Cavitation Free" NPSH The calculation set (5000, 7000, 9000, 10500 & 12000 gpm) is sample calculation follows:

,endix A. A "CAVITATION FREE" NPSHr CALCUL--O a =

5 (GPM) Flow.

N =

7 (rpm)

A-B =

3 (in21 Suction area. Lobanoff & Ross e

awing Z06196.

AE =

1 (in 2)

Impeller eye area.

B, =

11 (deg.) Blade inlet a (A-B)AE

=

Area ratio I o

off and Ross).

K, =

From Lobanoff sFigure 8-18.

D,=

15.25 lmpelle diameter CM1

=

9 (f/).

ge meddianal velocity at blade inlet (.321 Q/AE).

UT

=

118.

eripheral velocity of impeller blade (DTN/229).

Tan(

Impeller inlet velocity ratio (CMI/UT)"

(deg.) Angle of flow approaching blade.

4a 640 (deg.) Angle of incidence (B1 -theta).

K2 =

0 From Lobanoff & Ross Figure 8-19.

CG =

0 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 {[(K,+K 2)CM1 2/2g + K2U-rT2/2g]CB}

F

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 6/35 August 14, 2006

SULZER 14, 2006 SuLZE Transient NPSH Study E12.5.1296 suizer pumps (US) leG Pump "NPSH-Recommended" calculation results are tabulated below. The calculation set (5000, 7000, 9000, 10500 & 12000 gpm) is collected in Appendix A.

Flow NPSH 5000 gpm 45.6 feet 7000 gpm 31.9 feet 9000 gpm 33.5 feet 10500lgpm 42.9 feet 12000 9pm 99.8 feet Table 3: RHR "Recommended NPSH" A sample "NPSH-Recommended calculation follows:

I 0p=

500

((

QBEP 80(

C/QBEP

=051 SN 1.84 SEN

=

1.1 ST =

SM =

,PM) 3iPM)

From performance curve From performance curve

{NPSHR - 0%/6

/ NPSHR-I Pbnl of a/

0Bp Function Function o Je and NPSHR(3%)

Functof impeller material and pumpage SLG 1.2; Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow 1.0 ; at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

SSuction specific speed at 3%

Suction specific speed at reference

{sqrt(NKs(30/%) / N.(REF))} for water if Nl,(3%) > 9300 = Nss(REF)

(ft)

From performance curve FCT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/FcT to allow for Casting and measuring Tolerances.

FcT = 1.0 In this study (ft)

NPSHREC = SN X SEN X ST x Sm x SLG X F. x NPSHR(30/%) x FCT FCT =

NPSHREc

=

References:

Hydraulic Hydraulica Review: E12.5.522 page 7 1.008.002 pages 1 - 5 7/35 August 14, 2006

IAugust 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Pump Results of both the "NPSH-Recommended" and "Cavitation Free" calculations, as well as the test curves for 1% and 3% head and drop, are plotted on Curve RHR II:

2:

RHR Test and Calculated NPSH

ýnrl'l I$H (as plotted) is Sulzer's theoretical recommendation for 40,000 NVNon limited cavitation damage to the impeller.

parison to the "cavitation free" curve (Lobanoff & Ross) shows that some

!vitation occurs at the "recommended" NPSHr. The slight erosion damage that occurs at this level is the basis for 40,000 hour0 days 0 hours 0 weeks 0 months criterion.

NPSHr curves based on 1% and 3% head loss are from development tests of these impellers, and represent the standard (Hydraulic Institute) method for determining NPSH; o

The same comparison as above demonstrates that slight cavitation will occur at these NPSH values.

8/35 August 14, 2006

SULZER August 14,2006 suter Pumps (US) tc Transient NPSH Study E12.5.1296 Sulzr Pmps US)IncPump When the previously tabulated transient NPSHa cases are compared to the plots of RHR II, it is seen that the minimum NPSHa value from each event, except for the ST-LOCA-BL is equal, or greater, than the (standard) 3% curve at the same flow:

o LT-LOCA is above the "Recommended" NPSHr curve; o

APP R, ATWS and SBO are between the 1% and 3% head loss curves; o

ST-LOCA-IL (10500 gpm) is above the 3% head loss curve; o

ST-LOCA-BL (11500 gpm) is below the 3% head loss curve.

Since some cavitation exists at reduced NPSHa scenarios, a graph defining vs.

Operating Life (Curve 3 - as follows) based on mechanical damage (es

-o has been developed in addition to the preceding NPSH analysis.

8000 hours0.0926 days 2.222 hours 0.0132 weeks 0.00304 months (-1 year) has been selected as an adequate post trans t nt operational life. This is an estimate of the minimum life expectancy that I e similar damage (during low NPSHa events) as that expected from an imp ting with NPSHa above the "recommended" (40,000 hour0 days 0 hours 0 weeks 0 months ) NPSHr curve:

o At the graphical NPSHr values for the 01 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ) these are high suction energy pumps. The resulting lack of s It NPSH margin would result in life reduction (due to cavitation dam aFated continually in the suppressed state; o Sulzer's graph provils i ine for operating at the lowest possible NPSHa, while Lir crease, over time, adequately removing enough energy It pump to prevent catastrophic failure; o The recommendelimum NPSHr (time.01 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ), at all flows, range from slightlabove 3% up to 6% head loss.

o Based o I%

-test inspection of the tested pumps the graph is conservative since th pld impellers showed no damage:

o

'4l were run for extended periods (2-3 hours) at 1% to 6% head loss i

ut losing suction, despite surging, noise and increased vibration; ral tests included NPSHa reduction to initiate loss of suction.

Pumps recovered, with no visible damage, after NPSH was restored; o

NPSHa increase over time, as dictated by the graph at a given flow, insures that recommended NPSH levels/duration will be less severe than that experienced during testing.

9/35 August 14, 2006

AMEMMEMEN SULZER August 14, 2006 Sulzer Pumps (US) I Transient NPSH Study E12.5.1296 Pump hours 0.01 0.1 1

10 100 1000 8000 30 0.01 0.1 1

10 100 1000 Operational Hours Curve 3: RHR NPSHr vs. Operating Life 8000 10/35 August 14, 2006

SULZER August 14, 2006 Suier Pumps (US) In Transient NPSH Study E12.5.1296 Pump RHR Results and

Conclusions:

The subject pumps have been analyzed and found to be suitable for reduced NPSHa operation, as described above, with equipment in "as new" condition, with exceptions as noted.

Curve 3 provides a guideline for operational life vs. NPSHa as a general recommendation for operation when the pumps may be subject to transient events outside of heir original scope.

Recommendations are also provided specifically to address the potentia' events provided by TVA Browns Ferry:T iC, o

Since the transient events identified as LT-LOCA, A APPR, ST-LOCA-IP all provide NPSHA values above the mini ished NPSHr, as established in the operating life graph (curve 3 acceptable - i.e. they meet the criteria for determining operation e v NPSHa from the graph.

o ST-LOCA-BL provides NPSHA values b required NPSH shown on the graph. Sulzer cannot recommend uhis transient due to inadequate o At the flows above 1100 t

pump was not NPSH tested to fully describe the knee.

iiis ljwn whether the knee is sharp or rounded (see previous e

"l background discussion).

o There I uate similar pump to adequately model the high flow NPS ues.

Analysis methodology compaoA test derived NP5Hr values with those predicted theoretically. The 4s were evaluated against this comparative basis in order to predict the remain op ional life of a pump in the aftermath of a transient event; o

An 8

!-,( post-transient operational lifetime was developed, based on sio anation damage to the 40,000 hour0 days 0 hours 0 weeks 0 months "recommended" NPSHr curve; the i

ell supported by the NPSH analysis and mechanical response on the and.;

Graphical NPSHa levels and duration are less severe than that actually experienced on the test stand; o

Empirical test information has been verified by one of the original test Engineers; o

Despite NPSH testing that was more severe than the "recommended" curve, post-test inspection revealed no damage.

When pumps are in an "undamaged" condition they can be operated in accordance within the NP5HA guidelines provided with the expectation of the 8000 hour0.0926 days 2.222 hours 0.0132 weeks 0.00304 months life described.

11/35 August 14, 2006

SULZER IAugust 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump Of the potential transient scenarios considered, only the ST-LOCA-BL-event exceeds the limits established in this report:

o Operation with lower than required NP5HA will result in surging and cavitation:

o Impeller damage may occur, but should not be catastrophic from this ten minute event; o There is insufficient data to predict the pumps' response.

Operation at the remainder of the transient scenarios is recommended:

o Although vibration and noise may increase as a result of severe tr nts, the units should continue pumping; o

Damage is likely, due to a transient event, but will not be cat

!If the operational life graph is followed the pumps will continue tn

S 12/35 August 14, 2006

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 Pump CS Pump NPSH Assessment and Analysis: Test and calculated NPSH values are analyzed and compared against the proposed transient events.

Performance curves 273768-79B, 27970-73 and 28022-25 have been averaged relative to head and efficiency vs. flow and plotted as curve CS I. For the basis of NPSH assessment, test points for NPSHR-3% and NPSHR-1% (3 capacities) have also been plotted on curve CS I based on development testing (NPSH test data has been tabulated in Appendix A).

Specific speed (Ns) and Suction Specific Speed (Nss) for both 3% andf1 follows:

51 o

Ns= 3580*30251/2/6273/4= 1571 o N5 _3%*= 3580*((3025/2)1/2)/213/4= 14193 o

Nss~jo= 3580*((3025/2)1/2)/22 /4=13706 Curve 4: CS Pump Average Performance 13/35 August 14, 2006

SULZER August 14, 2006 SULZ ER Transient NPSH Study E 12.5.1296 SuLzer Pumps (US) Inc Pump Results of the "Cavitation Free" NPSHR calculation (based on Lobanoff and Ross) are as per the following table.

Flow NPSH 2000 gpm 159 feet 3000 gpm 126.3 feet 3750 gpm 87.6 feet 4500 gpm 76.7 feet Table 4: CS "Cavitation Free" NPSH The calculation set (2000, 3000, 3750 & 4500 gpmn) is collected in AppE calculation follows:

Ale Q = [

(GPM) Flow.

U j N =

3 (rpm)

A-B =

1 (in2)

Suction area. Lobanoff & Ross and Sulze 4wing06196.

AE =

6 (inW)

Impeller eye area.

B, =

1 (deg.)

Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lo* offt R

).

K, =

1.48 From Lob' r Figure 8-18.

Dt =

(in.)

Impeller eye di CM1

=

10.518 (ft./s.)Averaimeridianal velocity at blade inlet (.321Q/AE).

UT =

-17.48 (

heral velocity of impeller blade (DTN/ 229 ).

Tan(G) =

0.09

'1hipeller inlet velocity ratio (CM1/UT).

E. =

91 Angle of flow approaching blade.

a

=

.4 (deg.) Angle of incidence (B1-theta).

K, 0.93 From Lobanoff & Ross Figure 8-19.

CB =

From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 {[(Kl+K 2)Cm1 2/2g + KU 2/2g]CB}

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 14/35 August 14, 2006

SULZER August 14, 2006 Sutzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump "NPSH-Recommended" calculation results are tabulated below. The calculation set (2000, 3000, 3750 & 4500 gpm) is collected in Appendix A.

Flow NPSH 2000 gpm 64.1 feet 3000 gpm 41.9 feet 3750 gpm 43.4 feet 4500 gpm 85.9 feet I able J: "lecommenaea Nrbi-I A sample "NPSH-Recommended calculation follows:

1%

I qic Q

3EP

=

3P =

(GPM)

From performance curve From performance curve 4

SN SEN S-SM 3LG

= I 1.62

{NPSHR- 0% / NPSHR-3°%/

(un% n(jafl /QBEp Function of pum a

S t

Function

NPISernNPSHR(3%)

= Z Function of inili* aterial and pumpage

= Z (deg.)

SLG

; Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SG= 1.0 ; at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required) 13890 ion specific speed at 3%

=

.Suction specific speed at reference I

{sqrt(NK(3%) / Nss(REF))} for water if Ns(3%) > 9300 = NSS(REF) 28.5 (ft)

From performance curve

=

FmT? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by 1/FcT to allow for Casting and measuring Tolerances.

FCT = 1.0 In this study

=

(ft)

NPSHREc = SN X SEN X ST X SM X SLG x Fs x NPSHR(3%) x FCT Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 -5 NPSHREc

References:

15/35 August 14, 2006

SULZER IAugust 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5.1296 SuizerPumps(US)p Results of both the "NPSH-Recommended" and "Cavitation Free" calculations, as well as the test curves for 1% and 3% head and drop, are plotted on Curve C5 II:

5: CS Test and Calculated NPSH "Recommen0l 9r 01- (as plotted) is Sulzer's theoretical recommendation for 40,000 hour*

%on limited cavitation damage to the impeller.

0 parison to the "cavitation free" curve (Lobanoff & Ross) shows that some vitation occurs at the "recommended" NPSHr. The slight erosion damage that occurs at this level is the basis for 40,000 hour0 days 0 hours 0 weeks 0 months criterion.

NPSHr curves based on 1% and 3% head loss are from development tests of these impellers, and represent the standard (Hydraulic Institute) method for determining NPSH:

o The same comparison as above demonstrates that slight cavitation will occur at these NPSH values.

16 /35 August 14, 2006

SULZER August 14,2006 Sutter Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump When the previously tabulated transient NPSHa cases are compared to the plots of CS II, it is seen that the minimum NPSHa value both events are equal, or greater, than the (standard) 3% curve at the same flow:

o The LOCA for 3125 gpm is above the 1% head loss curve; o The LOCA for 4125 gpm is just above the 3% head loss curve Since some cavitation exists at reduced NPSHa scenarios, a graph defining HHr vs.

Operating Life (Curve 6 - as follows) based on mechanical damage (erosion) Otes has been developed in addition to the preceding NPSH analysis.

6 8000 hours0.0926 days 2.222 hours 0.0132 weeks 0.00304 months (~1 year) has been selected as an adequate post trans 0

perational life. This is an estimate of the minimum life expectancy that will odu similar damage (during low NPSHa events) as that expected from an impeller with NPSHa above the "recommended" (40,000 hour0 days 0 hours 0 weeks 0 months ) NPSHr curve:

o At the graphical NPSHr values for the ori

(,

urs) these are high suction energy pumps. The resulting lack of s P5-PSH margin would result in life reduction (due to cavitation damag

" k ted continually in the suppressed state; o Sulzer's graph I

a ne for operating at the lowest possible NPSHa, while

-qnjo increase, over time, adequately removing enough energyom e pump to prevent catastrophic failure:

o The recommende nimum NPSHr (time.01 hours1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months ), at all flows, range from slighteabove 3% up to 6% head loss.

o Based o ls

%t inspection of the tested pumps the graph is conservative since

!l" Snkcted impellers showed no damage:

&ps were run for extended periods (2-3 hours) at 1% to 6% head loss without losing suction, despite surging, noise and increased vibration:

o Several tests included NPSHa reduction to initiate loss of suction. Pump recovered, with no damage, after NPSH was restored; o NPSHa increase over time, as dictated by the graph at a given flow, insures that recommended NPSH levels/duration will be less severe than that experienced during testing.

17 /35 August 14, 2006

SULZER August 14, 2006 Sulzer P J

Transient NPSH Study E 12.5.1296 Pump hours 1

10 0.01 0.1 100 1000 8000 L)

Ii C'

0Z 2001 0.01 0.1 1

10 100 Operating Hours Curve 6: CS NPSHr vs. Operating Life 1000 8000 18/35 August 14, 2006

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump CS Results and

Conclusions:

The subject pumps have been analyzed and found to be suitable for reduced NP5Ha operation, as described above, with equipment in "as new" condition.

Curve 6 provides a guideline for operational life vs. NPSHa as a general recommendation for operation when the pumps may be subject to transient events outside of their original scope.

Recommendations are also provided specifically to address the potential tra ien vents provided by TVA Browns Ferry:

1'*

o Both potential LOCA events (as tabulated) provide NPS ove the minimum established NP5Hr (as established in the om r ing e graph) and are acceptable - i.e. they meet the criteria for deter ational life vs.

NPSHa from the graph (curve 6).

Analysis methodology compared test derived NPSHr those predicted theoretically. The pumps were evaluated against t lrative basis in order to predict the remaining operational life of a pump i f ermath of a transient event; o

An 8000 hour0.0926 days 2.222 hours 0.0132 weeks 0.00304 months post-transient op tio I lifetime was developed, based on similar cavitation damage to t hour "recommended" NP5Hr curve; the curve is well supportelt alysis and mechanical response on the test stand; o Graphic P

a levels and duration are less severe than that actually experienced on the test stand; o Emocal test information has been verified by one of the original tltest Engineers; V

pite NP5H testing that was more severe than the "recommended" curve, post-test inspection revealed no damage.

When pump "undamaged" condition they can be operated in accordance within the Hlines provided with the expectation of the 8000 hour0.0926 days 2.222 hours 0.0132 weeks 0.00304 months life described.

The *tI d transients are acceptable scenarios within the operating recommendations establisld in curve 6:

o Although vibration and noise may increase as a result of severe transients, the units should continue pumping; o

Damage is likely, due to a transient event, but will not be catastrophic. If the operational life graph is followed the pumps will continue to function.

19/35 August 14, 2006

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump APPENDIX A - TEST bATA ANb CALCULATIONS I

20/35 August 14, 2006

I SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Suizr Pmp (S) ficPump RHR Performance Curve:

0 uo so III 60 so 4Q 30 Z094inh 20 0

P Coj

,N Customer Cu 2784: Typical RHR Witness Test Performance Curve RHIR NPSH R H

.5ata is tabulated as follows:

Flow NPSH For Various Head Losses Comments J~

V1%

Loss 3% Loss 6% Loss 270685-A 7,512 30.0 ft.

15.6 ft.

Untested Test stopped at 15.6 feet NPSH-10,015 30.3 ft.

23.4 ft.

23.2 ft.

7512 gpm drop still only 2.3%.

270685-B 5,004 34.0 ft.

19 ft.

Untested Test stopped at 19 feet NPSH -

10,009 37.0 ft.

28.5 ft.

20.8 ft.

5004 gpm drop still only at 2.7%.

270685 5,000 34.2 ft.

19.5 Untested 5000 - 2.5% drop at 19.5 feet.

7,505 31.0 ft.

15.9 ft.

Untested 10,000 31.5 ft.

20.8 ft.

20 ft.

12,000 47.5 ft.

40.7 ft.

36.2 ft.

21/35 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump CS Performance Curve:

7":=

Tf

,,=

FT...m::iC:.;.J*

hTTTi77TTCTT7-T*~L;]l,],*71>; tFTTl!.t.~

2i'.,*l*::.2

.i

't.4 4

ti.0

r..

1

.',~Irtl;l*

j 2';

1

~

f:

I L i....

i!

r:?! : :; =....

.+..

.!! ;in ;.

, i ;" :"":.,:..,::,

"',hlp' At I

j; A~

A.iý;

4i4 f~-.

.:iJ i

T...

1::1,.p :Jý 1

t' '1

__I.

I

_hh" ____il 1

ii:

ilý if i~

1

B

-BI AM Z

B*o R,.

R.P. M.

Customer T9-: Typical CS Witness Test Performance Curve CS H

Data:

CS 1, t data is tabulated as follows:

Test I Flow NPSH For Various Head Losses Comments 1% Loss 3% Loss 6% Loss 270427 3,110 21.3 ft.

21.2 ft.

21.0 ft.

Sharp knee @ 3110. NPSHr must 4,510 43.0 ft.

31.5 ft.

26.0 ft.

be above knee.

270427 2,013 30.0 ft.

23.0 ft.

Untested Test stopped - 1.6% @ 23 feet.

22 /35 August 14, 2006

I SULZER August14, 2006 stillir Pump (US)Inc Transient NPSH Study E 12.5.1296 Pump RHR Cavitation Free NPSH Calculations:

"CAVITATION FREE" NPSHr CALCULATION o =

0 (GPM)

Flow N

=

8 (rpm)

A-B

=

3 (in00 Suction area. Lobanoff& Ross and Sulzer drawing Z06196.

A,

=

1 (in"l Impeller eye area.

B,

=

I (deg.)

Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lobanoff and Ross).

K, From Lobanolf & Ross Figure 8-18.

D, =

(in.)

Impeller eye diameter CMi

=.

(ft./sec.) Average meridianal velocity at blade inlet (.321 Q/Ac).

UT =

1 (ft./sec.) Peripheral velocity of impeller blade (DrN/229).

Tan(e) 8 Impeller inlet velocity ratio (CMI/Ur) 8 =

4 (deg.)

Angle of flow approaching blade.

a

=

6 (dog.)

Angle of incidence (BI-theta).

K2 0.6 From Lobanoff & Ross Figure 8-19.

C

=

0.93 From Lobanoft & Ross Figure 8-20.

C NPSHr =

s-.8 (ft,)

Lobanoff&Ross equation 8-2 {[(KC+K))C 2

.g]c.}

References:

Lobanoff & Ross, "Centifugal Pumps: Design & ApplicatiorJ 2nd Edition, Gulf Publishing, 1992 A

4111, Ii I

RHR PUMP @598fPM "CAVITATION FRe H

ULATION Q

7 (GPM)

Flow.

1W N =

7 (rpm)

A-B 3

(in')

Suction area. Lot&

Ross and Sulzerdrawing Z06196.

A, 16i.

(inr Impe e area.

B, A

NI*)

Blade inlet angle.

A AE B.

-ra tio (From Lobanolf and Ross ).

KK From Lobanoff & Ross Figure 8-18.

D, sI cn.

Impella eye diameter t13 sac.) Average meordianal velocity at blade inlet (

3 2 1Q/AE).

(ft./sec.) Peripheral velocity of impeller blade (DTN/229).

1 Impeller inlet velocity ratio (Crj/Ur) 8

.39 (dog.)

Angle of flow approaching blade.

a

=

4 (dog.)

Angle of incidence (B1-theta).

K2

=

3 From Lobanoff & Ross Figure 8-19.

c

=

93 From Lobanoff & Ross Figure 8-20.

NPSHr =

(h

()

Lobanotf&Ross equation 8-2 {)(Kr+K 2)CMC"/2g + K2Ur T /2g]C8}

eferences: Lobanoff & Ross, *Centifugal Pumps: Design & Application" 2nd Ed tion, Gulf Publishing, 1992 4

RHR PUMP @ 7000 GPM 23 /35 August 14, 2006

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump "CAVITATION FREE" NPSHr CALCULATION Q

=

9 (GPM)

Flow.

N = r 8

(rpm)

A-B =

3.

(in 2"

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AF =

1 (in2v Impeller eye area.

B,.

(deg.)

Blade inlet angle.

(A-B)/A

2.

4

(%)

Area ratio (From Lobanoff and Ross I.

K, = F 158 From Lobanoff & Ross Figure 8-18.

D, =

1 (in.)

Impeller eye diameter CM1 =

1 (ft./sec.) Average meridianal velocity at blade inlet (.32tQ/Al).

U, =

1 8

(ft./sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(O)

=

13 Impeller inlet velocity ratio (CW*/UT) e -

(deg.)

Angle of flow approaching blade.

a =

2 (deg.)

Angle of incidence (B-theta).

K, = F

.31 From Lobanoff & Ross Figure 8-19.

c. = F 0.93 From Lobanoff & Ross Figure 8-20.

C )

NPSHr =

71.2 (it.)

Lobanoff&Ross equation 8-2 {[(KiK2)C g]C.)

References:

Lobanoff & Ross, 'Centifugal Pumps: Design & Applicatio 2nd Edition, Gulf Publishing, 1992 RHR PUMP @ 90W4*'

e)6 Y

"CAVITATION FR" f-ig..

A--C ULATION Q.

(GPM)

Flow.

N =

1 (rpm)

A-B.

3 (in')

Suction area-

& Ross and Sulzer drawing Z06196.

A,

=

1 (in2i impeV ye area.

B, Blade inlet angle.

(A-B)AE 217..

)

ratio (From Lobanoff and Ross ).

K,=From Lobanoft & Ross Figure 8 D n

Impeller eye diameter 5E i

./sec.)

Average meridianal velocity at blade inlet (.321Q/Ac).

18 7 (ft./sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(

=

5 Impeller inlet velocity ratio (CmI/UN )

6 =

(deg.)

Angle of flow approaching blade.

a -

1 (deg.)

Angle of incidence (8,-theta).

K2

=

0 From Lobanoff & Ross Figure 8-19.

C

=

0.93 From Lobanoff & Ross Figure 8-20.

NPSHr =

7 (ft)

Lobanoff&Ross equation 8-2 {((K,+K,)Cml'/2g +-, K<UT 2/2g]C 2)

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Application" 2nd Ed lion, Gulf Publishing. 1992 RHR PUMP@ 10500 GPM 24 /35 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump "CAVITATION FREE" NPSHr CALCULATION a =

2 (GPM)

Flow.

N =

7 (rpm)

A-B

=

36.

(in2)

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

A 16 (in 21 Impeller eye area.

B

(deg.)

Blade inlet angla.

(A-B)/AE

=

(%)

Area ratio (From Lobanoff and Ross ).

Kl -

1 From Lobanoff & Ross Figure 8-18.

0, (in.)

Impeller eye diameter Cm, 2,.

(ft./sec.) Average meridianal velocity at blade inlet (.32tQ/A,).

U, (ft./sec.) Peripheral velocity of impeller blade (DrN/229).

Tan(r )

=.

Impeller inlet velocity ratio (CMt1/UT) 8 =

1 (deg.)

Angle of flow approaching blade.

0. 6 (deg.)

Angle of incidence (B,-theta).

K2 =

0 From Lobanoff & Ross Figure 8-19.

C5

.931 From Lobanoff & Ross Figure 8-20.

NPSHr = r (ft.)

Lobanoff&Ross equation 8-2 {[(K,+K,)Cml'/2g U T

References:

Lobanoff & Ross. 'Centifugal Pumps: Design & Application" 2nd Ed lion, Gulf Publishing, 1992 RHR PUMP @

25 /35 August 14, 2006

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump CS Cavitation Free NPSH Calculations:

"CAVITATION FREE" NPSHr CALCULATION O =

2 (GPM)

Flow.

N =

3 (rpm)

A-B =

J (in"'

Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

AE -

6 (in"i Impeller eye area B=

6 (deg.)

Blade nlet angle.

(A-B)/A,

=

2

(%)

Area ratio (From Lobanoff and Ross ).

K, -

8 From Lobanoff & Ross Figure 8-18.

D, =

(in.)

Impeller eye diameter CMu =

5 (ft./sec.) Average meridianal velocity at blade inlet (.

3 2 1 Q/AI ).

UT =

1 (ft./sec.) Peripheral velocity of impeller blade (DTN/229).

Tan(O)

Impeller inlet velocity ratio (Cur/UT) e =

5 (deg.)

Angle of flow approaching blade.

a =14 (deg.) Angle of incidence (B1-theta).

K, 0.93 From Lobanoff & Ross Figure 8-19.

Cu 0 93 From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 {[(Kt+K,)C l

.2g)Cs(

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Applicatio 2nd Edition, Gulf Publishing, 1992 A

A Cs PUMP @ 201W0w "CAVITATION FR&

j~AFCULATION a

=

3 (GPM)

Flow.

N.

(rpm)

(p A-B

= j (in"1 Suction area. Lobanoff & Ross and Sulzer drawing Z06196.

A 0

(in" Impleye area.

(A-BYAF

=

2

%)

ratio (From Lobanoff and Ross).

K, -

From Lobanoff & Ross Figure 8-18.

D,5n~.)

Impeller eye diameter 1 15 7 (t./sc.)Average meridianal velocity at blade islet (.3 2 1Q/Ac).

1=

0 (ft./sec.) Peripheral velocity of impeller blade (DrN/229).

T

.a488 Impeller inlet velocity ratio (C 51/UT) r 8

(dog.)

Angle of flow approaching blade.

a

=

7 (deg.)

Angle of incidence (Br-theta).

K, -

F07?

From Lobanoff & Ross Figure 8-19.

C 0

=

From Lobanoff & Ross Figure 8-20.

NPSHr =

=

(it.)

Lobanoff&Ross equation 8-2 {[(Kr+K2).Cu'i2g + K2Ur'/2g]C.)

References:

Lobanoff & Ross, *Centifugal Pumps: Design & Application" 2nd Edition, Gulf Publishing, 1992 4

CS PUMP @ 3000 GPM 26 /35 August 14, 2006

SULZER August 14, 2006 Suzer Pumps (US) In Transient NPSH Study E12.5.1296 Pump "CAVITATION FREE" NPSHr CALCULATION o

=

3 (GPM)

Flow.

N =

3 (rpm)

A-B

=

22 (isn Suction area. Lobanoff & Ross and Sulzer drawing Zi A,

=

6 (in' Impeller eye area.

B, =

16 (deg.) Blade inlet angle.

(A-B)/AE

=

2

(%)

Area ratio (From Lobanoff and Ross ).

K, -

F

.48 From Lobanoff & Ross Figure 8-18.

D, =

6 (in.)

Impeller eye diameter Cmi

=

o.

(ft.sec.) Average meridianal velocity at blade inlet (.321Q1/A5 ).

UT

=

1 (fl.(sec.) Peripheral velocity of impeller blade (DrN/229).

Tan(r ).

83 Impeller inlet velocity ratio (CM/UT) 8 =

1 (deg.)

Angle of flow approaching blade.

a

=

(deg.)

Angle of incidence (Bi-theta).

K, F-0.4 From Lobanoff & Ross Figure 8-19.

SE0.93 From Lobanoff & Ross Figure 8-20.

NPSHr =

8776 (ft.)

Lobanoff&Ross equation 8-2

References:

Lobanoff & Ross, "Centifugal Pumps: Design & Applicatio r

l 2nd Edilon, Gulf Publishing, 1992 06196.

hr q

CS PUMP @ 3 "CAVITATION F rE"Wr CALCULATION 4

Q (GPM)

Flow.

N =

8 (rpm)

A-B

=

(in421 Suclarea. Lobanoff & Ross and Sulzer drawing Z061 96.

A

= [

1.

Impeller eye area B,

I eg.

9 inlet angle.

AB A Area ratio (From Lobanofl and Ross).

K 8

From Lobanoff & Ross Figure 8-18.

(1n.)

Impeller eye diameter O

(ft/sac.) Average meridianal velocity at blade inlet (.321 QIA,).

174 (fl./sec.) Peripheral velocity of impeller blade (DrN/229).

(

0).= 2 Impeller inlet velocity ratio (Cmi/Uf) 8 =

1 (deg.)

Angle of flow approaching blade.

a 32 (deg.) Angle of incidence (B-theta).

K, = F037 From Lobanoff & Ross Figure 8-19.

c

= F From Lobanoff & Ross Figure 8-20.

NPSHr =

(ft.)

Lobanoff&Ross equation 8-2 )((KirKI)CMjI'2g + KrUT2/2g]Cs(

References:

Lobanoff & Ross, 'Centifugal Pumps: Design & Application" 2nd Edrtion, Gulf Publishing, 1992 CS PUMP @ 4500 GPM 27 /35 August 14, 2006

SULZER August 14, 2006 Sutzor Pumps (US) I Transient NPSH Study E12.5.1296 Pump RHR Recommended NPSH Calculations:

"NPSH RECOMMENDED" CALCULATION Q

QBEP Q/QR,,P SN SEN ST SM SLG Nst(3%)

Nss(REF)

Fs NPSHR(3%)

Fc r

=

8600

=

1-21 0.97

=

19

- L-7 GPM)

GPM)

From performance curve From performance curve

{NPSHs - 0% / NPSHR-3%) = Function of OIQ/Qp Function of pumpage and NPSHR(3%)

Function of temperature and NPSH,(3%)

Function of impeller material and pumpage deg.)

SLG = 1.2 Guarantee of 40.000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0; at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Suction specific speed at 3%

Suction specific speed at reference

{sqrt(N,,(3%) I N,,(REF))) for water it N,,(3% ) v 9300 = N,,(

(it)

From performance curve FCT ? 1.0 : avoids adding margin on to margin e

ye has Been increased by J/Fcr to allow for Casting a easur ng Tolerances.

FCT = 1.0 In this study li o

(ft)

NPSHujc = SNX SEN X STX Sn X SLG X S

(3%) X FCT eview: E12.5.522 page 7 1.008.002 pages 1 - 5

&)

0 NPSHnEc

References:

Hydraulic R Hydraulics "NPSH RECOE ALCULATION Q

7000(GPM) From per fiorrae QoEP =

8600 (GPM) From performance curve

=

0.614

40 SN

{NPSHR - 0% / NPSHR-3%) = Function of Q/QBEP SEN -

uncton o pumpage and NPSHr(3%)

F)STNs Flunction of temperature and NPSHR(3%)

Function of impeller material and pumpage (deg.)

SG 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLc 1.0 at min. flow and runout flow (40,000 hoLr are not required)

)N

3) 3 Suction specific speed at 3%

EF) =

9300 Suction specific speed at reference F, =

9 (sqrt(N,,(3%) / N,,(REF))) for water if N,(3%) > 9300 = N,,(REF)

NPSHR(3%)

=

18.3 (It)

From performance curve FCr =

FCT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been increased by I/FCT to allow for Casting and measuring Tolerances.

FCT = 1.0 In this study NPSH 0

r71.-5 (ft)

NPSHAEc = SNX SEN X STX S, X SLO x F, x NPSH,(3%) x FCT leferences:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages I - 5 RHR PUMP @ 7000 GPM 28 /35 August 14, 2006

SULZER "August 14, 2006 Suler Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump "NPSH RECOMMENDED" CALCULATION QG Q/QO Q

=

0 (GPM)

REP

=

8600 (GPM)

=E 1.49 From performance curve From performance curve N

SN - E721

{NPSHR - 0% / NPSHn-3%j = Function of Q/Q13EP S

1N

=

Function of pumpage and NPSHr(3%)

ST = F 097 Function of temperature and NPSHP(3%)

SM =

=

Function of impeller material and pumpage SLG = r (deg.)

SLG = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months Impeller life at BEP flow SL= 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not re Nss(3%)

3 Suction specific speed at 3%

i Nss(REF)

=

93-00 Suction specific speed at reference Fý

=

{sqrt(N,(3%) / N,(REF))} for water if Ni(3% > 9300 = N,(V PSHi(3%)

= E (ft)

From performance curve F

=

l FcT ? 1.0 ; avoids adding margi on to margin i SH re has Been increased by 1/F0 r to allow for Casting a; eas i

ances FIT = 1.0 In this study NPSHvEc

- r (ift)

NPSHvEc =SIX SNXuSTX u

S, X

,WX Sk>5

) x uFcT ferences:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 0

Re RHR PUMP @,N "NPSK RECOJPIVWAALCULATION 0=

1 (GPM) From p ea Qu.p

-- 600 (GPM)

From erfor

.ecurve Q/Q8Fr =

2 SN

{NPSHR - 0% / NPSHn-3%) - Function of Q/QBEP SEN

= L

"*r'-

unction of pumpage and NPSHp(3%)

ST 8

Function of temperature and NPSHn(3%)

Function of impeller material and pumpage (deg.)

SLG = 1.2: Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SL0 = 1.0; at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Ns

)

=

1 Suction specific speed at 3%

EF) =

9-30 Suction specific speed at reference Fs

=

9

{sqrt(Ni(3%) / N,,(REF))) for water if N,,(3%) > 9300 = N,,(REF)

NPSHi(3%)

9 (fit)

From performance curve FcT

=

I FCT ? 1 0 ; avoids adding margin on to margin if tested NPSH curve has Been ncreased by 1 /FCT to allow for Cast ng and measuring Tolerances.

FCT = 1.0 In this study NPSHric =

4-29 (1f)

NPSHREC -

SNX SEN xSTX SIx SLGX FrX NPSH(3%) X FT

References:

Hydraulic Review: E12i5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 RHR PUMP @ 10500 GPM 29 /35 August 14, 2006

SULZER I

August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump "NPSH RECOMMENDED" CALCULATION 0 =

1 (GPM) From performance curve SIN SEN SrT Nss(3%)

Nss(REF)

F,

NFSHjj(3%)

FCT f

6001 (GPM)

= --

741

= J[J (deg.)

=

4013

(

40*

ft

=Lr----

From performance curve

{NPSHA - 0% / NPSHR-3%) = Function of QIQ5 pp Function of pumpage and NPSH,(3%)

Function of temperature and NPSH,(3%)

Function of impeller material and pumpage SLG = 1.2 Guarantee of 40.000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0; at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Suction specific speed at 3%

Suction specific speed at reference

{sqrt(N,,(3%) / N,,(REF))} for water if N,,(3%) > 9300- N,,(Rt From performance curve FCT ? 1 0 : avoids adding margin on to margin if test *PSII v

a Been ncreased by 1/FCT to allow for Casting ane rig T anc FCT = 1.0 In this study NPSHRFC

= SN X SEN X ST X Sý X SLG X FSl X FCT NPSHnec. -i ;

(It)

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 RHR PUMP @ 1*

1%

I 30 /35 August 14, 2006

SULZER August 14, 2006 Sulzer Pumps (US) Inc Transient NPSH Study E 12.5. 1296 Pump CS Recommended NPSH Calculations:

"NPSH RECOMMENDED" CALCULATION Q

0 SEF Q/QRES

= L I

(GPM) 0F00 (GPM)

From performance curve From performance curve SN =

1.621

{NPSH - 0% / NPSHi-3%) = Function of Q/QISEP SEN = F 116 Function of pumpage and NPSHn(3%)

ST 0

F

.98 Function of temperature and NPSHR(3%)

Sr.=

=

Function of Impeller material and pumpage SLG =

(deg.) SLG = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Nss(3%)

=

1 0

Suction specific speed at 3%

Nss(REF) =

30 Suction specific speed at reference Fs

=

22

{sqrt(N,,(3%) / N,,(REF))) for water if N,,(3%) > 9300. N,(

NPSHR(3%)

= F

28.

(It)

From performance curve F10

=

F0 1'?f.0 ; avoids adding margin on to margin e

ye has Been increased by! /Fcr to allow for Casting a easurng Tolerances.

FCT = 1.0 In this study NPSHsec

=

(ft)

NPSH.,Ec=SNxSENSXSmxSn, S

(3%)

o (3

oFCT

References:

Hydraulic Review: Er12.5.522 page 7 Hydraulics 1.008.002 pages t - 5 00 CSPUMP j01W 0e)

"NPSH REC J~j#@DIs"CALCULATION Q =

3 (GPM) From perfor ve 3000 (GPM)

FroZ erformance curve Q/OES

N NP

{NPSHR - 0% / NPSHR-3%) = Function of QGQGEP SEN =

unction of pumpage and NPSHp(3%)

ST Function of temperature and NPSH5 (3%)

Function of impeller material and pumpage 1.2 (deg.)

SLc = 1.2 ; Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life SLc = 1.0 ; at min. flow and runout flow (40,000 ho s

) =

1 Suction specific speed at 3%

,(REF)

=

9300 Suction specific speed at reference F,

=

{sqrt(N,,(3%) / N,,(REF))) for water if N,,(3%) > "

NPSHi3%)

=

21.5 (ft)

From performance curve Fc0

=

For ? 1.0 ; avoids adding margin on to margin if te eat BEP flow our are not required) 300 = N,,(REF) sted NPSH curve has measur ng Tolerances.

(3%) x FIT Been ncreased by ItFcT to allow for Castong and FCT = 1.0 In this study NPSHiEC = SNX SeN X STaX S. x SLG x F, x NPSHi NPSHEc

=

4-1.9 (ft)

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages 1 - 5 CS PUMP @ 3000 GPM 31/135 August 14, 2006

SULZER August 14,2006 Sulzer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump "NPSH RECOMMENDED' CALCULATION o

=

375*0" (I QBEs =

0 (C

Q/QunE =

12 SN =T~

SEN =

1.13 ST SLG Nss(3%)

1 Nss(REF)

=

9300 Fs 1."222l NPSHR(3%)

=F

-231 F0 r

=

1 1

NPSH-f 0 c =

4~

GPM) From performance curve GPM)

From performance curve

{NPSHR - 0% / NPSHR-3%) = Function of Q/0Oup Function of pumpage and NPSHp(3%)

Function of temperature and NPSH,(3%)

Function of impeller material and pumpage deg,)

SLý = 1.2 Guarantee of 40,000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow Sic = 1.0 at min. flow and runout flow (40,000 hour0 days 0 hours 0 weeks 0 months are not required)

Suction specific speed at 3%

Suction specific speed at reference

{sqrt(N,,(3%) / N,,(REF))) for water if N,,(3%)

9300 N(R (ft)

From performance curve FIT ? 1.0 ; avoids adding margin on to margin if tes v

a Been increased by 1/F0 r to allow for Casting an rng T ran" FIT - 1.0 In this study (It)

NPSHRec = SN X SEN X STX S. X SLG X F

~

X FT 4

i

References:

Hydraulic Review: E12.5.522 page 7 Hydraulics 1.008.002 pages I - 5 CS PUMP @ 3 "NPSH RECOCJli O"CALCULATION 4

Q =

5 (GPM)

From perfort7j0 e

QuEP

=

3000 (GPM)

Froýerformance curve QiQuur

=

N

{NPSHR - 0% 1 NPSHo-3%) = Function of QIQBEp SEN -r u

unction of pumpage and NPSHR (3%)

SF Function of femperafure and NPSH-(3%)

Function of impeller material and pumpage 1 degý)

SLG = 1.2 Guarantee of 40.000 hours0 days 0 hours 0 weeks 0 months impeller life at BEP flow SLG = 1.0 at min. flow and runout flow (40.000 hour0 days 0 hours 0 weeks 0 months are not required)

N X) =

1 Suction specific speed at 3%

REF) 93 Suction specific speed at reference F,

=

22

{sqrt(N,,(3%) / N,((REF))) for water it N,,(3%) u 9300 = NS,(REF)

NFSHH(S%)

=

31.5 (ft)

From performance curve For

= E FCT ? 1.0 ; avoids adding margin on to margin if tested NPSH curve has Been ncreased by 1fF01 to allow for Cast ng and measur ng Tolerances.

For = 1.0 In this study NPSHOEc

=

(ft)

NPSHIc = S1 X SIN SX STX S, X SLI x F, x NPSHn(3%) x For

References:

Hydraulic Review: E12 5.522 page 7 Hydraulics 1.008.002 pages I - 5 CS PUMP @d 4500 GPM 32 /35 August 14, 2006

SULZER August 14, 2006 Suizer Pumps (US) Inc Transient NPSH Study E12.5.1296 Pump APPENDIX B - PUMP CROSS SECTIONS I

33 /35 August 14, 2006

SULZER August 14, 2006 Transient NPSH Study E12.5.1296 Suizer Pumps (US) Inc Pump RHR Pump Cross Sectional Drawing:

A 0

?~

-J fTt 1>

7/

i/

//

/ /

7!

Sulzer Drawing D27358: RHR Pump Cross Sectional Drawing 34 /35 August 14, 2006

EMEN SULZER August 14, 2006 Transient NPSH Study E12.5.1296 Suitor Pumps (US) Inc Pump CS Pump Cross Sectional brawing:

4 Sulzer Drawing Z6315: CS Pump Cross Sectional Drawing 35 /35 August 14, 2006

v t e Letter Sequence Other
TAC:MC3743, Revise Containment Requirements During Handling Irradiated Fuel and Core Alterations (Approved, Closed) TAC:MC3744, (Approved, Closed) TAC:MC3812, Revise Containment Requirements During Handling Irradiated Fuel and Core Alterations (Approved, Closed)
Initiation Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request Acceptance, Acceptance, Acceptance, Acceptance, Acceptance Supplement, Supplement, Supplement Administration Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance, Withholding Request Acceptance Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting, Meeting Questions 19 September 2006 29 December 2004 30 December 2004 6 January 2005 3 October 2005 3 October 2005 22 December 2005 22 December 2005 19 January 2006 7 March 2006 25 May 2006 2 June 2006 26 June 2006 26 June 2006 19 July 2006 19 July 2006 8 August 2006 10 August 2006 7 August 2006 10 August 2006 1 September 2006 6 September 2006 1 September 2006 15 September 2006 21 September 2006 27 September 2006 20 December 2006 17 November 2006 26 January 2007 Answers 28 February 2006 23 March 2006 23 March 2006 31 March 2006 19 October 2006 Results Approval, Approval, Approval, Approval, Approval, Approval Other: ML042370100, ML050380283, ML050590036, ML050900421, ML051150191, ML051160036, ML051320148, ML051430036, ML051570381, ML051660602, ML052290397, ML060530185, ML060670304, ML060680586, ML060680590, ML060680596, ML060680599, ML060720253, ML060720272, ML060720273, ML060720281, ML060720293, ML060720295, ML060720298, ML060720303, ML060720354, ML060830009, ML060880464, ML060880469, ML061040217, ML061210117, ML061770163, ML061840027, ML061910705, ML062050056, ML062090482, ML062090555, ML062120411, ML062130163, ML062130343, ML062200277, ML062210102, ML062220647, ML062270240, ML062400472, ML062510022, ML062510371, ML062510374, ML062510382, ML062510385... further results
MONTHYEAR2005-02-23 [Table View]

ML062920156

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E Function of impeller material and pumpage SLn

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Conclusion:

Conclusion:

Title:

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Conclusions:

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Conclusions:

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40 SN

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N NP

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