ML20090A142
| ML20090A142 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 02/20/1992 |
| From: | Beck G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9203020161 | |
| Download: ML20090A142 (6) | |
Text
. _
PillLADELPIIIA ELECTRIC COMi%NY NUCLEAR GROUP HEADQUARTERS 955-65 CllESTERBROOK llLVD.
WAYNE, PA 19087 5691 (215) 640 6000 NUCLEAR ENGINEERING A. SERVICl3 D".fARTMENT February 20, 1992 Docket Nos.
50-277 50-278 License Nos. DPR-44 DPR-56 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555
SUBJECT:
Peach Bottom Atomic Power Station, Units 2 and 3 Inservice Testing Program
REFERENCES:
(1) Letter from J. W. Gallagher (PECo) to W.
R.
Butler (NRC) dated June 29, 1988.
(2) Letter from W. R. Butler (NRC) to G.
J.
Beck (PECo) dated January 17, 1991.
(3) Letter from G. J. Beck (PECo) to NRC dated dated October 8, 1991.
Dear-Sir:
In Referenct (1), Philadelphia Electric Company (PECo) submitted a revised second 10-year interval Inservice Testing l
(IST) Program for Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3.
In Reference (2), the NRC transmitted a Safety Evaluation of the IST Program.
In Reference (3), PECo provided an updated, uncontrolled copy of Revision 2 to the-IST Program wnich included changes recommended by the NRC in the Safety Evaluation.
The purpose of this letter is to submit revisions to two previously approved Relief Requests, GPRR-1 which contains administrative changes only and is provided for information, and GPRR-2 which is being submitted for NRC review and approval prior to implementatien.
The associated pages'from the Pump Tables are also enclosed.
Relief Roquest GPRR-1 allows pump vibration to be measured in units of velocity instead of displacement amplitude, as required by ASME Code Section XI, IWP-4500.
This Relief Request currently applies to all pumps in the IST Program.
Implementation of Modification 5344 will add proximeters to the High Pressure i
9203020161 920220 ADOCKOb000ff7 ffyf DR ll/
Pooch' Bottom Atomic Power Station, Units 2 & 3 Page 2 February 20, 1992
,EInservice Testing Program Coolant Injection (HPCI) pumps which will then permit pump vibration to be measured in units of displacement amplitude.
Consequently, once this modification is completed, Relief Request GPRR-1 will no longer be needed for the HPCI pumps.
Relief Request 'GPRR-1 will still be needed for the HPCI booster pumps.
The enclosed revised GPRR-1 replaces-the phrase "All pumps in the
- IST Prograni" with a list of each pump by number, with the exception of the HPCI pumps.
In addition, an editorial change has been made to the " Basis for Relief" section of GPRR-1.
Both of these changes.are considered to be administrative and therefore do not require prior NRC approval.
Relief Request GPRR-2 grants relief from measuring pump bearing temperature on the basis that pump / bearing mechanical condition is being determined usi.g the vibration monitoring program, and that vibration is measured in units of velocity.
This Relief-Request also applies to all pumps in the IST Program.
In the-enclosed. revision to GPRR-2 we propose to delete the specific reference to velocity measurement.
The reason for this proposed deletion is that velocity measurement will no longer be necessary for the HPCI pumps once a modification is completed which will allow measurement of displacement amplitude.
Thic proposed Relief Request will not be implemented until it is approved by the NRC.
Once Modification 5344 is complete, we will continue to measure HPCI pump vibration velocity in addition to measuring displacement amplitude until the proposed revision to GPRR-2 is approved.-
If you have any questions or require additional information, please do not hesitate to contact us.
Sincerely, G. 'J. Beck, Manager Licensing Section Enciosures
'cc:
T. T.
Martin, Administrator, Region I, USNRC J. J.-Lyash, USNRC Senior Resident Inspector, PBAPS
PBAPS 2 & 3e'IST Pr:*1ptm SPsc. H-710, Rev. 2 App 3ndix B Page 1 of 4
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RELIEF REQUEST NO. GPRR-1, REVISION 1 l
Pump t s ):
DA(B,C,D)P060 00P186 OA(B)P057 OA(B)P163 20P033 30P033 20P036 30P036 2A(B,C,D)P035 3A(B,C,D)P035 2A(B,C,D)P037 3A(B,C,D)P037 2A(B)PO40 3A(B)040 2A(B,C.D)PO42 3A(B,C,D)PO42 Testint Requirement (s): Measure vibration amplitude displacement quarterly (1HP-4500)
Basis for Relinft ASME Section XI requires puti.p vibration measurement in displacement amplitude, ( peak-to-peak composi t e ),
to be taken during each inservice test.
Although not identi fled by Section XI, vibra tion can also be accurately measured using vibration velocity measurements.
The criteria for vibration speed l.
measurement is not sensitive to or dependent on pump and provides an absolute value for acceptable limits on-vibration. In addition, this technique is an industry accepted method which is sensitive to vibrational changes that are indicative of dtveloping mechanical problems.
Velocity measurements provido an accepta'.21e predictive tool to detect changes in the vibration that indicate a mechanical problem.
Since Section XI does not address vibration velocity measurement, methods for testing and acceptance criteria will be in accordance wi th ANSI / ASME OM, Part 6 - 1987/1987A.
Alternate Testing 1 Pump vibration measurements will be in vibration velocity (in/sec).
Acceptance criteria from ANSI /ASME DM, Part 6 -
1987/1987A is summarized in Table 1 below.
Table 1 Vibration, Velocity (in/ sect, Acceptance Criteriau Asleeinhle Rnnan M E LBanse EnnvintsLAs.lisa Vertical.and 0-2.5V,
> 2. 5V, -6 V,
>6V, Horizontal-or or or Centrifugal Pumps 0 325 in/sec
).325.7 in/see
>.7 in/sec
(>600 RPM)
- Note:
The most limiting of the two ranges given is applicable.
A m p_tabin_Ennue Alsr_LRanna EnnuitnsLatiisn Positive 0-2.5V,
>2.5V,
>6V, Displacement Pumps V, = Vibration Reference Value I
f i
P
i PBAPS 2 & 3, IST Ppcgpca Spic. M-710, Rav. 2 Appendix B Page 2 of 4 RELIEF REQUESi NO. GPRR-2, REVISION 1 l
Pumpt,s):
All pumps in ihn IST Program Testing Requirement (s): Measure bearing temperature annually (1HP-3500)
Basis for Relieft The measuring of bearing temperatures along with vibration monitoring are both means of determining the mechanical condi tion of a pump. However. in order for bearing temperature measurements to be useful, continuous monitoring would be required. The riso in temperature due to bearing degradation is a very sudden occurrence which in much more detectable in its early stages by utilizing vibration monitoring.
Serious degradation s iuld have to occur to cause a detectable ris:e of temperature on the bearing housing. Vibrastion monitoring is a more logical means of detecting bearing degradation prior to an increase in temperature.
Alternate Testingt Pump / bearing mechanical condition will be determined using the vibration monitoring program.
Bearing temperature will not be measured.
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.s REVISION 2 PUMP TABLF.
Ibf TABLE - PUMPS PAGE WO: * ?2 PEACH BDTTOM,.f0MIC POWER STATION - Lat!T 2 & COMMON CATE:.12/26/91 PUMP TEST' RELIEF PUMP NAME OR DESCRIPTION
- 10. NO.
P&10 :
COORD.
PARAMETERS REQUEST REMAMS i
EMERGENC' SERVICE WATER BOOSTER CAP 163 M-330(SMT 1)-
E-6 Pi, D/P, V, C, GPRR-1, GPRR-2, L/P CPER-3 EMERGENCY SERVICE WATER BOOSTER OSP163 M-330(SHI 1)
D-6 Pi, D/P, V, 0, GPRR-1, CPRR-2, L/P GPRR-3 HIGH PRESSUE COOLANT !MJECTION (HPCI) 2f=038 M-366(SHT 1)
F-6, 7 N, Pi, D/P, 0, GPRR-2
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MAIN PUMP V, L/P HICH PRESSURE COOLANT INJECTION (HPCI) 20P033 M-366f':*T 1) f -6, _ 7 N, *i, D/P, o, GPRR-1, GPRR-2 BOOSTER PUMP V, L/P i
HIGH PRESSURE SERd!CE WATER (HPSW) 2APO42 M-315(SHT 1)
A-7 Pi', D/P, C, GPRR-1, CPRR-2
- CALCULATED INLET PRESS. (TEXT V, L/P 5.1.1).
HIGN PRESSURE SERVICE WATER (HPSV) 2SPO42 M-315($NT 1)
A-5 Pi*, D/P, o, CPRR-1, CPRR-2
- CALCULATED INLET PRESS. (TEXT V, L/P 5.1.1).
HIGd PRESSURE SERVICE WATER (HPSW) 2CPO42 M-315(SHT 1)
A-6 Pi', D/P, 0, i;PRR-1, GPRR-2
- CALCULATED INLET PRESS. (TEXT-V, L/P 5.1.1).
HIGH PRESSURE SERVICE WATER (HPsW) 2DPO42 M-315(SHT 1)
A-4 Pl*, D/P, C, CPRR-1, CPRR-2
- CALCULATED INLET PRESS. (TEXT V, L/P 5.1.1).
3 REACTOR CORE ISOLATION COOLING (RCIC) 20P036 M-360(SMT 1)
E-T N, Pi, D/P, C, CPRR-1, GPRR-2 V, L/P RESIDUAL HEAT REMOVAL (RMR) 2AP035 M-361(SHT 1)
A-5 Pi, D/P, Q, V, CTRR-1, GPRR-2 L/P RESIDUAL HEAT REMOVAL (RHR) 2BP035 M-361(SHT 2)
C-5 Pi, D/P. O, V, GPPR-1, GPRR-2 t/P RESIDUAL FEAT REMOVAL (RPR) 2CP035 M-361(SHT 1)
B-5 Pi, C/P, C, V, CPRR-1, GPRR-2 L/P
.. w SPEC. F 710P REVISION.2
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PUMP TABLE IST TABLE - PUMPS PAGE NO:
4 PEACH BOTTOM ATOMIC PCMER STAT!cu - tmf13 DATE: T2/26/91:
PtMP TEST RELIEF PtEP NAME OR DESCRIPTION ID.'NO.
PE!D COORD.
PARAMETERS REQUEST.
REMARKS CORE SPRAY (CS) 3AP037 M-362(SHT 2)
_D-6 Pi, D/P, 0, V, GPRR-1, GPRR-2 L/P CORE SPRAY (CS) 3BP037 M-362(SMT 2) 0-3 Pi, D/P, 0, V, GPRR-1, GPRR-2 t/P.
CORE SPRAY (CS) 3CP037 M-362(SHT 2)
D-4 Pi, D/P O, V, GPRR-1, GPRR-2 L/P CCRE SPRAY (CS) 30P037' M-362(SMT 2)
D-2 Pl. D/P, 0, V, GPRR-1, GPER-2 L/P HIGH PRESSURE COOLANT INJECTION (HPCI) 30P038 M-366(Stif 4)
F-7 N, Pi, D/P, 0, GPRR-2 MAIN PUMP V, L/P HIGH PRESSURE COOLANT INJECTION (HPCI) 30P033 M-366(SHT 4)
F-7 N, Pi, D/P, 0, GPRR-1, GPRR-2 BOOSTER PUMP V, L/P HIGH PRESSURE SERVICE LATER (HPSW) 3APO42 M-315(SHT 3) 8-7 Pl*, D/P, Q, CPRR-1, GPRR-2
- CALCULATED INLET PRESS. (TEXT V, L/P 5.1.1).
h!GH PRESSURE SERVICE WATER (HPSW) 3BP042 M-315($HT 3) 8-5 Pi*, D/P, c, GPRR-1, CPRR-2
- CALCULATED INLET PRESS. (TEXT V, L/P 5.1.1).
HIGH PRE %SURE SERV!CE WATER (HPSW) 3CPO42 M-315(SMT 3)
B-6 Pi*, D/P, 0, GPRR-1, GPRR-2
- CALCULATED INLET PRESS. (TEXT V, L/P 5.1.1).
HICH PRESSURE SERV CE WATER (NPSW) 3D9042 M-315(SMT 3) 8-4 Pi', D/P, 0, teR2-1. GPRR-2
- CALCULATED INLET PRESS. (TEXT V, L/P 5.1.1).
REACTOR CORE ISOLATION C00LIC (RCIC) 30P036 M-360($HT 2)
E-7 N, Pi, D/P, 0, GPRR-1, GPRR-2
- v. L/P RESIDUAL HEAT REM &
(RHR) 3AP035 M-361(SHT 3)
A-5 Pi, D/P, 0, Y, CPRR-1, GPRR-2 L/P