ML20066G700

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Requests Relief from ASME Boiler & Pressure Vessel Code Section Xi,Iwp Requirement for First 10-yr Pump & Valve Inservice Testing Program
ML20066G700
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 01/23/1991
From: Beck G
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9101280171
Download: ML20066G700 (10)
v • d • e


Text

_-____- -

10 CFR 50.55(a)

PHILADELPHIA ELECTRIC COMPANY NUCLEAR GROUP HEADQUARTERS 955 65 CHESTERBROOK BLVD.

WAYNE, PA 19087 5691 (als)sao.sooo January 23, 1991 Docket Nos. 50-352 50-353 License Nos. NPF-39 I

NPF-85 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Limerick Generating Station, Units 1 and 2 Relief Request for the First 10-Year Pump esting Program and Valve Inservice m Gentlemen:

Attached for your review and approval is Relief-Request No.

GPRR-3 and the associated pump table changes for the Limerick Generating Station (LGS), Units 1 and 2, First 10-Year Interval Pump and Valve Inservice Testing -(IST) Program.

The LGS IST Program was initially submitted to che NRC for Unit 1 by letter dated June 15, 1984, and was subsequently revised by letter dated November 23, 1988, to include Unit 2 and address NRC comments.

The

-LGS IST_ Program'is-currently under review by the NRC.

Relief Request No. CDRR-3 requests relief from the ASME Boiler and Pressure Vessel (B&PV) Code Section XI,_ Subsection IWP requirement that IST flow measurement equipment have an accuracy of 2% of full-scale, and requests NRC approval to use ultrasonic flow measurement equipment at LU? which is accurate to within i 5% of the reading.

(

This Relief Request applies to the Standby' Liquid Control (SLC) pumps, Diesel' Fuel Oil Transfer pumps, and Safeguard Piping

/

Fill pumps.

Philadelphia Electric Company (PECo) has been using ultrasonic flow measurement equipment with an accuracy of 5%

"of-reading" at LGS tc trend the performance of these pumps based O

A 1

Ok 910128C171 910123 PDR ADOCK 05000332 kk P

PDR c ss s.-

t U.S.

Nuclear Regulatory Commission January 23, 1991 Document Control Desk Pace 2 on our interpretation of the ASME B&PV Code,Section XI, Subsection IWP requirements.

Only recently did we consider that a relief request would be necessary.

We had interpreted the Code requirement of i 2% of full-scale accuracy with full-scale of three (3) times the rcference value as being equivalent to i 6%

"of-reading" accuracy; therefore, a flow instrument that is accurate to within i 5% "of-reading" meets the intent of the Code.

However,

'"o our discussions with representatives from the NRC on October 5, A>30, we learned that a relief request and NRC approval to use the proposed ultrasonic flow measurement equipment to trend pump performance was necessary.

If you have any questions, or require additional information, please do not hesitate to contact us.

Very trul

youre, Mk G. J.4 Beck Manager Licensing Section Nuclear Engineering and Services Attachment cc:

T. T. Martin, Administrator, Region I, USNRC (w/ attachment)

T. J. Kenny, USNRC Senior Resident Inspector, LGS (w/ attachment)

C.

Ransom, EG&G Idaho (w/ attachment) l ll l

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LGS 1 & 2 IS1 Progrim Appendix B

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RELIEF REQUEST NO. GPRR-3 PUHP( S ):

Safeguard Piping Fill 1AP256 2AP256 IBP256 2BP256 Diesel Fuel Oil Transfer 1AP514 2AP514 IBP514 2BP514 1CP514 2CP514 1DP514 2DP514 Standby Liquid Control 1AP208 2AP208 1BP208 2BP208 1CP208 2CP208 TESTING REQUIREMENT (Sit Pump instrumentation accuracy shall be within the limits specified in ASME Section XI Subsuction IWP Articles INP-4110 and INP-4120.

BASIS FOR RELIEF:

PECo proposes to measure flow using ultrasonic floss instrumentation tha t is calibr9ted to an accuracy within tS%

of reading instead of the Cooe required 22% of full-scale.

Although this equipment does not meet the Code requirements exactly, it meets the intent of the Code by ensur.ing that data collected during inservice tasting is measured to the degree of accuracy speci fied in Articles IHP-4110 and IHP-4120.

Because the Code does not address digital instruments and of-reading accuracy limits, a conversion from full scale accuracy to of reading accuracy is necessary to compare the ultrasonic instrument accuracy to the accuracy specified in the Code.

Also, because the ultrasonic flow transducers are capable of measuring flow over the entire range of the instrument (0 to 40 feet /second), a percentage of full-scale accuracy would be meaningless when measuring low flow rates associated with small diameter pipes. To ensure that the most accurate data is collected during inservice testing, the technicians are provided guidance through the vnndor manuals to select the trans.ducer that is best suited for the pipe where flow is being measured.

For instruments to be in compliance with ASME Section XI Subsection INP, two requirements must be satisfied. The first requirement (specified in IWP-4110, Table IHP-4110-1) states that flow inotrumentation must be accurate to within 12% of the full scale valuey the second requirement (specified in IWP-4120) states tha t "the full-scale range of 'ench instrument shall be three times the reference value or less." PECo'=

interpretation.of those requirements allows for establishing a maximum of reading crror of 26% that would be acceptnble por the Code.

Alternate flow measuring instruments, such as magnetic - flow meters, provide granter accurucy. However, because they are not seismically qua li fi ed they are not suitable for use in the required applications. Also, inctallation of the magnetic flow meters woulu require signtficant piping modifica tions.

PECo considers that the ultrasonic flow iastruments provide the necessary accuracy for pump per.ormance trendino purposes and to det.ct pump degradation Also, we consider that we meet the intent of the : ode since

.e ultrasonic flou instrument is accura te to within 15% of-reading.

ALTERNATE TEST'ING:

Uso ultrasonic flow instrumentation, which is accurate to within 15% of-reading, for measuring IST flow da ta.

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PAGE No.: 1

!$f TA813 - PltdPS DATE: 06/20/90 LIMERICE CENERATING STATION - UNIT # 1 & COMMON TEsi REttEF I

PUMP REMARKS PtmP h*mE ce DESCRIP!!cN 10, No.

P110 COORD. PARAMETERS REQUEST CONTROL RtXNt CMILtED CAP 162 M-70 (SHI t) C-4 PI, D/P. 1 V.

CPRR-1, CPRR-2 ROTATING SPEED EXEMPI PER IWP-4400.

L/P

" WAYER CONTROL RotM CHILLEO 06P162 M-94 (SNT 1) f-2 Pf, Dse.

, V, CPRR-1, CPRR-2 ROYAltNG SPEED EXEMPT PER IuP-4400.

L/5 WAYER 1AP206 M-52 (Snf 2) C-/

P i, D/P, 0, V, CPRA-2 PtEP SEARING IEMPERATURE EXEMPT CORE SPRAV (CS)

PER tup-4310. ROTATING SPEED t/P EXEMPT PER fuP-4400.

. J4P BEARING TEMPERATURE EXEMPT r

1EP206 M-52 (SMT 2) C-3 Pf, 0/*

V, CPRR-2 PER IUP-4310. ROTATING SPEED CORE SPRAY (CS) t/P EXEMPT PER (WP-4400.

1CP206 M-52 (SNI 2) C-5 Pi, D/P, C. V, CPRR-?

PUMP BEAR'NG TEMPEKATURE EXEMPT r

PE4 "'s-4310.

ROTATING SPEED Coaf SPRAY (CS) t/P EXEMPT PER fuP-4400.

1DP206 M-52 (SHT 2) C-2 Pf, 0/P, L, V, CPRR-2 PLHP BEARING TEMPERAftNIE EXEMPT PER tup-4310. ROYAltkG SPEED CORE SPRAY (CS) t/P EXEMPT PER tw-44rJ0.

'E DIESEL fufL O!L TRANSFER 1AP514 M-20 (Swi 3)

C-4 Pl*, O/P, 0, V CPRR-3

  • CALOJLATED INLET PRESSURE (TEki g

5.1.1).

PUMP SEARING TEMPERAYURE EXEMPT PER IWP-4310. ROTATING SPEED EXEMPT PER IUP-4400.

!NACCES$18tE FOR LU8RfCAf f 0N CHECK.

O!ESEL FUEL O!L TRAN'f ER 18P514 M-20 (SHI 4) C-4 Pf *, 0/P, 0, V CPRR-3

  • CALCULATED INLET PRESSURE (TEXT g

5.1.1).

PUMP SEARING TEMPERATURE EXEMPI PER IWP-4310. ROTAIING f

SPEED EKEMPT PER IWP-4400.

f INACCESSt9tf fta LUeRICATION I

CHECK.

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PACE No.: 3 IST TARLE - PtstPS LIMERICK CENERAi!NG STAil0N - UNii 8 1 & COMMON DATE: 06/20/90 PUMP TEsi RE1IEF

.,1]2 COORD, PARAMETERS REQUEST REMAgrS P

PUMP GA8aE OR DESCRf PiloM

10. NO.

EXEMPT PER IWP-4400.

H!CN PRESSURE COOLANT 10P204 M 50 (SHT 1) F-5 W, Pi, D/P, 0, CPRR-1, CPAR-2 V, L/P INJECil0W (HPCI)

REACTOR CORE ISCLAil0N 10P203 M-50 (SHT 1) F-6 M. Pi, D/P, 0, CPRR-1, CPRR-2 COOLING (RCIC)

V, L/P RESIDUAL ltEAT REMOVAL TAP 202 M-51 (SNT 1) 8-4 Pf, D/P, 0, V, CPRR-2 PUMP BEARING TEMPERATURE ExEMP1 PER luP-4310. ROTAllNG SPEED L/P (RNR)

EXEaPT PER IUP-4400.

RESIDUAL NEA* REMOVAL 18P202 M-51 (Siti 3) a-5 Pi, C/P, 0, V, CPRR-2 Ptste SEARING TEMPERATURE EXEMPT PER luP-4310. ROIAllNG SPEED L/P (RHR)

EXEMPI PER luP-4400.

RESIDUAL ttEAT REMOVAL 1CP202 M 51 (SNT 1) 8-3 F', D/P, 0, V, CPRR-2 PUMP SEARING TEMPERATURE EXEMPI PER !UP-4310. ROIATING SPEED L/P (RHR) 2XEMPT PER IWP-4400.

RESIDUAL NEAT REpo/AL 1DP202 M-51 (SNT 3) s-6 Pi, D/e, o, V, h.PRR:2 PLMP EEARIEG TEMPERATURE EXEMPT PER luP-4310. RotA!!wG SPEEC a'

L/P (RkR)

EXEMPT PER IUP-4400.

RHR SERVICE WATER (AdR$W) CAP 5C6 M-12 (SNT 1) E-6 Pl*, D/P, C, V, CPRR.-2

  • CALCULATED IWiti PRESSURE (IEXT L/P 5.1.1).

PUMP BEARING TEMPERATURE EXEMPT PER IWP-4',10.

ROYAllNG SPEED EXEMPI PcR IWP-4400.

RHR SERYlCE WATER (RNR$U) 08P506 M-12 (SNT i) E-4 Pl*, D/P, 0, V, CPRR-2

  • CALCULATED INLET PRESSURE (TExi L/P 5.1.1).

PUMP BEARING TEMPERATURE EXEMPT PER IWP-4310. kOTAllNG SPEED EXEMPT PER IWP-4400.

exy AttR SERVICE WAIER (RHRsu) OCP506 M-12 (SHT 1) E-5 Pi*,0/P,0,V, CPRR-2

  • CALCULATED INLET PRESSURr s

L/P 5.1.1).

PUMP EEARING IEMPERATURE

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' PAGE 180.x 4 LIMERICE CENERATING SYAT10sl - (Stil f 1 1 C0pe90N BATE: 06/20/90 -

' PUMP TEST-

-RELIEF PimeP stAME OR DESCRIPTION

10. NO,

- PQD.

COORD. PAR AMETER}, -'

-REQUEST REnARKs' EXEMPT PER IWPa4310. Rot At t #G.

-SPEED EMEMPI P5R IWP-4400.

RHR SERVICE ntATER (RHRsu) ODP506' M-12 (Suf.1) E-3 Pl*, D/P, 0, V,'

CPRR-2

~* CALCULATED IMtET PRESSURE (TEXT-L/P 5.1.1).. Ptmp SEARING TEWCRATURE E

ENEMPT PER IWP-4310.-ROYAltNG SPEED ENEMPI PER IUP-4400.

SAFEGUARD P! PING fitt 1AP256

.M-52 (SWT 2) G-2 Pl D/P, Q, V, CPRR-1, CPRR-3 ROIAflNG $ PEED EMEMPI PER IWP-

.l t

L/P 4400.

t I

SAfEG.tARD P! PING FitL 10P256 M-52 (SHI 2) 7-2 Pl. D/P, o, V, CPRR-1, CPRR-3' ROYA!!NG SPEED EXEMPI PER tup-l L/P 4400.

i

. SYAN0Bf Llot310 CONTROL 1AP205 M-48 (SHf 1) ~ 6-5 Pl D/P, 0, V, GPRR-1, CPAR-3 ROYAllWG SPEED EXEMPT PER IWP-l l

(stC) ue 4400.

f STAND 8Y Lt0UID CONTROL 18P208 M-48 ?$MT 1) C-5 PI, D/P, 0, V, GPRR-1, GPRR-3 ROTATING SPEED EKEMPT PER [WP.

l i

(5tc)

L/P 4400.

$iANDBf LIQUID CONTROL 1CP208 M-48 ($HT

'4 8-5 Pl D/P, C, V, lCPRR-1,GPRR-3 R0fA!!NG SPEED EKEMPI'PER IWP-g

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L/P 4400.

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A N IST TABLE - PUMP 9 PAGE No.: 5 LIMERICK CEWERAllNG STATIOh - tmli 8 2 DATER 06/20/90 PUMP IEST REllET PUMP.NAME OR J{1CA Pil0N

10. No.

281g COORD. PARAMETERS REouEST REMARKS CORE SPRAY (CS) 2AP206 M-52 (Sui 4) C-7 Pl, D/P, o, V, CPRR-2 PLMP BEARING TEMPERATURE EXEMPT L/P-PER IUP-4310. 20 FAYING SPEED EXEMPT PER IUP-4400.

CORE SPRAY (CS) 28P206 M-52 (SNI 4) (

Pi, D/P, C, V, CPst-2 P0MP SiARING TEMPERATURE EXEMPI L/P PER IUP-4310. ROTAllaiG SPEED EXEMPT PER IWP-4400.

CORE SPRAY (CS) 2CP2C4 M-52 (SNT 4) C-5 Pl, D/P, 0, V, CPRR-2 PUMP BEARING TEMPERATURE EXEMPT L/P PER IWP-4310. ROIAllNG SPEED EXEMPI PER IWP-4400.

CORE SPRAY (CS) 2DP206 M-52 (SMT 4) C-2 Pl, D/P, Q, V, CPRR-2 PtMP BEARING TEMPERATURE EXEMPT L/P PER IuP-4310. ROI4TikG SPEED EXEMPT PER IUP-4400.

DIESEL FUEL Olt TRANSFER 2AP514 M-20 (SMT 7) C-4 Pi', D/P, 0, V CPRR-3

  • CALCULATED INLET PRESSURE (IEXT l

5.1.1).

PtNP BEARING TEMPERATURE EXEMPI PER lWP-4310. RO1AllNG SPEED EXEMPT PER IWP-4400.

INACCESSIBLE FOR LU9RICATION CHECK.

DfESEL FUEL OIL TRANSFER 28PS14 M-2C (SWI 8) C-4 Pl*, D/P, Q, V CPRR-3

  • CALCULATED IktET PRESSURE (TEXT l

5.1.1).

PLMP 8 EARING TEMPERATURE EXEMPT PER IWP-4310. ROYATING SPEED EXEMPI PER IWP-4400.

INACCESSIBLE FOR LUBRICAll0N C:tECK.

DIESEL FUEL OIL TRANSFER 2 CPS 14 M-20 (SHI 9) C-4 Pl*, D/P, Q, V CPRR-3

  • CALCULATED INLET PRESSURE (TEXT

[

5.1.1).

PUMP BEARING TO1PERATURE EXEMPT PER IUP-4310. ROIATING SPEED EXEMPT PER IL?-4400.

INACCESSIBLE FOR Lts:tlCAf!ON CNECK.

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