SEntergy

Entergy Nuclear Operations, Inc.Vermont Yankee320 Governor Hunt Rd.Vernon, VT802-257-7711

Christopher J. WamserSite Vice President

BVY 13-034

May 1, 2013

U.S. Nuclear Regulatory CommissionAttn: Document Control DeskWashington, DC 20555-0001

SUBJECT:

REFERENCES:

Response to Request for Additional Information Regarding ReliefRequest No. RR-PR-01Vermont Yankee Nuclear Power StationDocket No. 50-271License No. DPR-28

1. Letter, Entergy Nuclear Operations, Inc. to USNRC, "InserviceTesting Program Plan for the Fifth Ten-Year Interval," BVY 13-008, dated February 1, 2013

2. Letter, USNRC to Entergy Nuclear Operations, Inc., "VermontYankee Nuclear Power Station - Request for AdditionalInformation Relating to Relief Request No. RR-PR-01 Associatedwith the Fifth 10-Year Inservice Testing Interval (TAC No.MF0625)," NVY 13-040, dated April 2, 2013

Dear Sir or Madam:

In Reference 1, Entergy Nuclear Operations, Inc. (Entergy) submitted the inservice test (IST)program and relief requests for the fifth 10-year interval for Vermont Yankee Nuclear PowerStation. This letter provides supplemental information to address a request for additionalinformation (RAI) received on April 2, 2013 (Reference 2). Attachment 1 to this submittalprovides Entergy's response to the RAI. Attachment 2 contains the requested service waterpump IST data.

This letter contains no new regulatory commitments.

Should you have any questions concerning this letter or require additional information, pleasecontact Mr. Robert Wanczyk at 802-451-3166.

Sincerely,

CJW/plc

AýwT

BVY 13-034 / Page 2 of 2

Attachments: 1. Response to Request for Additional Information2. Inservice Test Data

cc: William M. DeanRegional Administrator, Region 1U.S. Nuclear Regulatory Commission2100 Renaissance Blvd, Suite 100King of Prussia, PA 19406-2713

Mr. Richard V. Guzman, Project ManagerDivision of Operating Reactor LicensingOffice of Nuclear Reactor RegulationU.S. Nuclear Regulatory CommissionMail Stop O-8-C2Washington, DC 20555

USNRC Resident InspectorEntergy Nuclear Vermont Yankee, LLC320 Governor Hunt RoadVernon, Vermont 05354

Mr. Christopher RecchiaCommissionerVermont Department of Public Service112 State Street - Drawer 20Montpelier, Vermont 05620-2601

BVY 13-034Docket 50-271

Attachment 1

Vermont Yankee Nuclear Power Station

Response to Request for Additional Information

BVY 13-034/ Attachment 1 / page 1 of 2

REQUEST FOR ADDITIONAL INFORMATION FORRELIEF REQUEST NO. RR-PR-01

RELATED TO TESTING OF SERVICE WATER PUMPSENTERGY NUCLEAR OPERATIONS. INC.

VERMONT YANKEE NUCLEAR POWER STATIONDOCKET NO. 50-271

The Nuclear Regulatory Commission (NRC) staff is reviewing the information providedby Entergy Nuclear Operations, Inc for Vermont Yankee Nuclear Power Station, in itsletter dated February 1, 2013, and has determined that additional information isnecessary to complete the review of Relief Request No. RR-PR-01. The NRC staff hasdetermined that additional information requested below will be needed to support itsreview.

RAI RR-P01-1

It is stated in part, in Section 6 of the Reference, that, "scheduledinspection/replacement of Service Water pumps will be on a 6 year fixed interval for thisRelief Request." Please confirm that this means that each service water pump will beinspected, replaced, or rebuilt every six years or less. Also, please provide the last dateof the inspection or replacement of each service water pump.

Response

Each service water pump will be inspected and rebuilt, as required, or replaced at least onceevery six years. The 'A' Service Water pump was replaced May 16, 2007. The 'B' ServiceWater pump was replaced June 14, 2012. The 'C' Service Water pump was replaced May 17,2009. The 'D' Service Water pump was replaced June 1, 2007.

RAI RR-P01-2

Section 6 also states, in part, that, "Once per Cycle, typically during each refuelingoutage when plant loads are minimized, a head-flow curve will be generated inaccordance with ISTB-5210, and the pump comprehensive test will be performed inaccordance with ISTB-5223." Explain how generating a new head-flow curve for eachpump approximately every two years, instead of using the same head-flow curve for the6-year inspection/replacement interval, will not mask pump degradation.

Response

It is only by comparing the most recent 5-point curve to the previous curves that pumpdegradation can be detected. An "as-found" curve is generated each refueling outage (RFO)and compared to the curve from the previous cycle, the curves since the most recent pumprebuild, and the original manufacturer's curve. A new "as left" curve is generated for each liftadjustment or replacement. This assures the required pump capacity is available until the nextscheduled adjustment, replacement, or RFO.

RAI RR-P01-3

Additionally, Section 6 states, in part, that, "On a quarterly basis, surveillance will beperformed by measuring pump differential pressure, motor vibration, and motor amps.

BVY 13-034/ Attachment 1 / page 2 of 2

The data will be compared to the degree possible with the head-flow curve and vibrationmeasurements and amps obtained during the previous 5-point test." Explain how therepeatability of the pump flow rate will be achieved, since as you noted in the abovereferenced document the pump flow rate cannot be measured. Also, please explain howthe pump differential pressure will be measured.

Response

As stated, flow rate cannot be measured during the quarterly test, because the plant wasconstructed without instrumentation to obtain individual service water pump flow duringoperation. During the quarterly test, vibration readings are obtained and compared to the valueat the -2700 gallon per minute test point on the 5-point curve. Also during the quarterly test,differential pressure (d/p) is determined by measuring discharge pressure minus thetemperature-corrected, bay level measured, correlated pressure. Comparison of the differentialpressure to the 5-point test is somewhat subjective, since it is affected by varying the number ofoperating pumps, plant loads, and cross-tied header operation. Motor amps are a measure ofpump load and are conservatively compared to the quarterly vibration measurement and d/pmeasurement.

Primarily, the quarterly test only allows that vibration and amps be monitored within theacceptance criteria, and can be correlated to the measured d/p, but is only indicative of thatpumps performance related to the number of pumps operating at the time. The once per cycletest data is used to assure the required pump capacity is available until the next scheduledadjustment, replacement, or RFO.

RAI RR-PO1-4

Please provide the inservice test data for the past 10 years for all of the service waterpumps noted in this request.

Response

The inservice test (IST) 5-point (capacity) test, quarterly d/p and amperage test, and quarterlypump vibration test data for the past 10 years for all of the Service Water pumps noted in therelief request are included in Attachment 2. Note that vibration data, which is taken at all 5points during the 5-point test, is not included in capacity test results due to the volume of data.

Additional notes on the test data:

1. Vibration test data is in units of inches per second. The .325"/sec. is genericOM Code Alert maximum, however point A-1 is approx. 1/2 of maximum.

2. The quarterly test data is from the IST trend database (original datatransferred from completed test forms).

3. The 5-point test data is from the IST "set-up" validation spreadsheet (officialdata is contained in the completed test form). This data includes thescheduled RFO surveillance and lift adjustments.

BVY 13-034Docket 50-271

Attachment 2

Vermont Yankee Nuclear Power Station

Inservice Test Data

P-7-1A Capacity Tests, 2003 - 2013124.00 ....... .. ... ......

PSID

122.00 ""

120.00

118.00 -

116.00

114.00

112.00

110.00

108.00

106.00 K

- -- RF028

* TRM

------ RF02930-Oct-2009

---- RFO-27

- RF026-U--- 7-Feb-2013---- RF030- 3/6/2003

NRF024RF025

- 2/8/2007

3/7/2007

*-.-- 2/14/20083/10/2007

-- O-Vendor

104.001800 2000 2200 2400

Flow (gpm)2600 2800 3000 3200

P-7-1 B Capacity Test, 2003 - 2013124

122 . . . .. TRMRFO-29

120 RF02812-Mar-2011118

--- 9-Dec-2009

a RFO-27116 . . 27-Sep-2008PSID

RF026114

- .RFO-25

6/14/2012112 .1/24/2013

1 RFO30110 -3/6/2003

-. RF024108 9/25/2008

- 4/28/20051-06oVendor

1041800 2000 2200 2400 2600 2800 3000 3200

Flow (gpm)

P-7-1C Capacity Test, 2003 - 2013124.00

122.00120.00 ' ....

PSID

118.00 +

116.00

114.00

112.00

110.00

108.00

106.00

- 05/15/2012

- 5/18/2012

--- 5/17/2009

- RF028

-- RF029

-eTRM

--- 2/1/2013

-U- RFO30

RF026

RF027

,-- 6-Mar-2003

RF024

S dRFO-25-.-<)--- Vendor

104.001800 2200 2800 3000 32002000 2400 2600

Flow (gpm)

P-7-1 D Capacity Test, 2003 - 2013

124

122

120

118

116

PSID 114

-*TRM

s RF029

- RF028

2/3/2012

----- RFO-27

RF026

0 RFO-25

----- RF024

-6-Mar-2003

1/18/2013

RFO30

5/18/2010

Z Vendor

112

110

108

106

1041800 2000 2200 2400 2600

Flow (gpm)2800 3000 3200

OP 4181.01(Q) P-7-1A AP & Amperage120

100

80

4~

~ 60 K-

I--- *-Delta P

-U-Amps

I....32 Amp Maximum

40

0 ----------- -------------- --- - -- ~N N ~ ~ N 0 ~ ~t m'.--..........Nmtt rg, .vz , m c ml h C 0-NI mCCN..m IN N Nz-,I-N- m.. 0 ~ *Jm 0I I~I m n ( t OO

OP 4181.01(Q) P-7-1B AP & Amperage140.00

120.00 -- - ~ - -- ----

10000-

0 ,0

-*-Delta P~-U--Amps60,00

......-......_32 Amp Maximum

40.00~ - --

20,00 -------- --. -. .

0.00Mmm, NN .N M'C'C O'WoCO~,O Oo•~.. . . .......... oo...........----------------.30 0

OP 4181.01(Q) P-7-1C AP & Amperage120.00

100.00

80.00

6000

40.00

'--Deita P

-0-Amps

---- 32 Amp Maximum

20.00

0.00 . .. ______ _____ _____ -- ______ ______ _

NNN NN N NNNNNN•%NNNNNNNNNN NNNNNNNNNNNNN NNNNNNNN NNNNNNN gx••%mN NmN•NN NNNNNNNNNNNNN %NN NNN%%NNNN

OP 4181.01(Q) P-7-1D AP & Amperage120,00 .--

100.00

80.0

00 -*-Delta P

-U-•Amps

32 Amp Maximum

40.00

,. . . . . . . . . . . . . . . . . . . . . . .. .Z.

.. . . .. . . .. . . . ...4a -a ;a-N 0QO000000000o0 0o0000 00000 0000o00 oo0 oo~ 000000000 0000 000000C 8ooo ooo oooo ooo oooo ooo ooo

OP 4181.01(Q) P-7-1A Vibrations0.375

0.350

0.325

0.300

0.275

0.2S0

0.225

0.200

i- 0.175

0.150

0.125

0.100

0.075

0.050

0.025

-u- n I- A

-A-1

•Maximum Allowable Vibration

O.000

OW0 RwN~ OOO a.~SN~N r 0000 000000OO ONO NO )N ,0ý0 0 0 . . . . .~YwON ~ ~ -- - -- -00 00 0 00 0 0-- 00 0 00------0 000-00--. - - - - - - - - -mv- mmo ýM, _Wm ---0~ 00 0o 0 00 0 0 0 0m --- 00 0 00 0 0 000 000 00W00-----0 000 0mc

OP 4181.01(Q) P-7-1B Vibrations

0.4500

0.42S

0.400-- ---- - -

0.2075- - - - - _ - --_ _

0,5 -- ----- -- -- - - - -_ _ _ _ _ _ _

0.175 . --- ,

0.025 [

00000000 ---------------- rl0 0 O~ ~~~ c00o 0,88 a 0 00., .. . . . .Q 00 000 00 00 00 0 00 00 0 0 00 0MCI*~N

.4~r -- --NN

------NNN 4N N N N N NN N N NN Nttl W~~l te . ~ 01J¶N 1ON 1N 00 0N 00 (0r .1~( 0( N 0 CN 00 01 tt 01N 04 o1 (r .( 0'C 1C Lt V01

A-1

i axmmAllowabie Vibration

OP 4181.01(Q) P-7-1C Vibrations0.400

0.375

0.350

0.325

0.300

0.275

0,250

0,225

S0.200

0.175

0,150

0.125 --- -

0,100

0.075

O.OSO

0.025 . . .. . . . . .

0.000

-Al-e-i r

.1-6-0-1

mMaximum Allowable Vibration

'_ , " m- %P.W U

an wwowwwwwa~oN 0o ooaooo~o000000000 ---------- N. Nn.-a o o0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000I0ooo-o . o cn4 -4 4 4 4 4 4 4 4 4 4

00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 00 0 0 0 0 0 ----------- 0 000

OP 4181.01(Q) P-7-1D Vibrations

I-

0,350

0.325

0.300

0.275

0.250

0.225

0.200

0.175

0.150

0.125

0.100

0.075

0.050

0.025

.A-1

ammMaximum Allowable Vibration

t+

~~~~OtO ~ ~ ~ Zý Z m;;,rrr 0 0ýO 0 . ~ N NN ~ I N NIZ50~ 00 0 0