ML18065A622
| ML18065A622 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 04/04/1996 |
| From: | Smedley R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9604120085 | |
| Download: ML18065A622 (10) | |
Text
consumers Power*
POW ERi Nii MICHlliAN"S PIUlliRESS Palisades Nuclear Plant: 27780 Blue Star Memorial Highway, Covert, Ml 49043 April 4, 1996 US Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT INSERVICE TESTING OF SAFETY RELATED PUMPS-BORIC ACID PUMP RELIEF REQUEST In accordance with 10 CFR Part 50.55a(b)(2)(viii), the Palisades Third Interval pump tests are to be perfqrmed in accordance with OMa-1988, Part 6. The Third Interval began on August 21, 1995, following the completion of our Cycle 11 refueling. The Palisades pump testing program requires the Concentrated Boric Acid Pumps (P-56A and B) to be tested quarterly. Palisades is not currently able to meet the flow rate test requirements of OMa-1988, Part 6 for these pumps due to instrumentation problems.
In accordance with 10 CFR Part 50.55a(f)(5)(iv) and NU REG 1482, Section 2.5, pump relief request PRR-10 is being submitted because the flow rate testing is considered an impractical requirement until the instrumentation can be corrected. Relief request PRR-10 therefore does not require approval prior to implementation. When the instrumentation is corrected, the use of this relief request will be discontinued as the full test requirements of OMa-1988 will then be met. The correction is expected to be done during the 2nd Quarter of 1996.
l I, Ii
~
A CMS' ENER6YCOMPANY
SUMMARY
OF COMMITMENTS This letter contains no new commitments and no revisions to existing commitments.
Richard W Smedley Manager, Licensing CC Administrator, Region Ill, USNRC Project Manager, NRR, USNRC NRC Resident Inspector - Palisades Attachment 2
ATTACHMENT CONSUMERS POWER COMPANY PALISADES PLANT DOCKET 50-255 INSERVICE TESTING OF SAFETY RELATED BORIC ACID PUMPS RELIEF REQUEST PRR-10 3 Pages
RELIEF REQUEST BASIS NUMBER10
- SYSTEM:
Chemical and Volume Control System PUMP:
P-56 A & B (Concentrated Boric Acid Pumps)
CLASS:
2 FUNCTION: These centrifugal pumps have an active safety function to provide boric acid from the concentrated boric acid tanks to the charging pumps during accident conditions. Pumps start automatically upon receipt of a Safety Injection Signal. In accordance with FSAR 9.10.2.6.7, each pump shall be capable of supplying a minimum of 68 gpm to the suction of the charging pumps.
TEST REQUIREMENT:
OMa-1988, Part 6, Table 3 requires the following param~ters to be measured or observed:
- Differential pressure
- Flow rate
- Vibration amplitude BASIS FOR.RELIEF:
In accordance with the provisions of 1 OCFR50.55a(f)(5)(iv) Palisades has determined measurement of test flow rate for the Concentrated Boric Acid Pumps is impractical.
As documented in Palisades corrective action document C-PAL-95-0029, Concentrated Boric Acid Pump flow instrument loop
. FE/FT /Fl-0211 has been experiencing installation and test difficulties due to the special operating conditions associated with this system.
Post installation testing conducted during the 1 995 refueling outage, indicated problems with the instrument loop flow element (FE) temperature rating and the flow element to flow transmitter calibration. The flow element temperature rating has been corrected and is now appropriate for the intended service.
RELIEF REQUEST BASIS NUMBER10
- 2 The flow element/flow transmitter installation is usually factory calibrated as a matched set. Since the flow element was changed, the factory match was not maintained for this set. In order to correctly match the flow element/flow indicator, the manufacturer must perform a field procedure. This procedure is scheduled for the second quarter of 1996. Once completed, the flow element/transmitter/indicator loop will be tested, declared operable if calibration criteria are met, and placed into service.
ALTERNATE TESTING:
NOTE:
Palisades will determine Concentrated Boric Acid Pump operability by performing inservice testing using a fixed resistance flow path without recording test flow rate. This test method was previously used during the Palisades Second Interval Pump lnservice Test Program.
When pumps are operating through the fixed resistance recirculation flow path, di.fferential pressure and vibration data shall be recorded and compared to acceptance criteria. This acceptance criteria shall be dete~mined in accordance with the requirements of OMa-1988, Part 6.
Historical testing in accordance with Technical Specification Surveillance Procedure Q0-18, "lnservice Test Procedure - Concentrated Boric Acid Pumps" indicates differential pressures are steady at appropriate reference values+/- 2% (References 1 and 2).
Other historical testing has repeatedly demonstrated the ability of each Concentrated Boric Acid Pump to deliver 68 gpm to the suction of the charging pumps as required by FSAR 9.10.2.6.7. Technical Specification Surveillance Procedure Q0-27, "lnservice Testing of CVCS Control, Motor*
Operated, and Check Valves," is performed during cold shutdowns, if not completed in the previous 92 days. The test method is similar to that which would be encountered during an actual emergency.* Results clearly indicate that the Concentrated Boric Acid Pumps can deliver nominally 80 gpm, thus meeting the design bases (References 3 and 4).
This relief request is considered approved in accordance with the provisions of 1 OCFR50.55a(f)(5)(iv). It shall remain effective until installation of FE/FT/Fl-0211 is completed, tested, and incorporated into the Concentrated Boric Acid Pump inservice test program.
REFERENCES:
RELIEF REQUEST BASIS NUMBER10
- 1.
P-56A/Q0-18, "Pump dP vs Date"
- 2.
P-56B/Q0-18, "Pump dP vs Date"
- 3.
Concentrated Boric Acid Check Valves, Q0-27, "GPM vs Date"
- 4.
Concentrated Boric Acid Check Valves, Q0-27, "Parameter Statistics" 3
Reference 1. P-56A/Q0-18, Pump dP vs Date" 10:
Lotation:
P-S6A I Q0-16 Aux 61dg. Boric Acid Pump Room. 590' Wednesday. M8rch 27, 1996
- 1: 19 PM Date:
PUtf.. (PSID-CM.C) 120.0
- -**********************-:*-****--********-*--:---***--*--****-~-"-----,.-----
116.0 *********************--******:**-*--*********-**-***7----******-****-***-: -***---~-------*-;-: ----,*****-*---*******-*-**
112.0 rtt. Y~'-
- 108.0 108.0 +----.;..------i-----!'"----!'""'---....... -....;....;.;~=-_..;..;;=---t 104.0 100.0. *********-**---*----***-**----------..,----;-----;----'---,...----i
~
I Lov Allrm
- 97.2 96~.l-------...;....... __
_......._..;..._._....._.....+_...~....... -.p..T'""'l"..,.-,....,.."'i'-1-r-?""T-r-'l'""T""'T""1~.....-i
~.
~
~.
~
1'92 1'93 1"4.
199.5
Reference 2. P-568/Q0-18, 11Pump dP vs Date" 10:
P-566 I Q0-16 Location:,
A(J)( Bldg. Concentrated Boric Acid Pumo Room. 590' Date:
Wednesday, March 27, 1996
- 1:24 PM PUl9 *
(PSID-CALC)
I
- 1 °'*o................................ :...... -........ -~... --.... +---*-*-
________.; ___,................ :........ -...... -*-***-**l I
H.
A~=1056 I
-**-**-*--******-~*****-**--***-**-***--**t I
101.0............................. ~ """"*-*-**--.. **--*:***-.. -*--*-:----, -*----
,7.0
.,'3.0...... -...... _..............,*-****-**-----:*
8'.0 Lo* Alwm = 86.4 85~-'-----...,....,.------....+_.... __.._........,.........,._~r-r-.,....,.-.-....-;-_..,....,...~~r-T"""T'""'T..,...,
Oot.
1'92 1993 1994 Oct Oct Tt..
Reference 3. Concentrated Boric Acid Check Valves Q0-27, "GPM vs Date" (Using P-56A or P-568 Pumps)
Concentrated Boric Acid Check Valves ID:
Q0-27 Date:
Tuesday, April 2, 1996 @ 5:17 PM
-X-CK-CVC2141 (GPM) 100--..-~~~~~~~~~~~~~~~~~~--.,
)(
)(
75 504-~r-T"-.--i--~r-i-r-r--r--,-r--T-,-_,.......~,---,-r-r--r---r.-J Feb Aug Feb Aug Feb 1994 1995 1Q96 Time
ID:
- Date:
Par 3
Reference 4. Concentrated Boric Acid Check Valves, Q0-27, a Parameter Statistics" (Pumps P-56A or P-568 Used)
Concentrated Boric Acid Check Valves Q0-27 Tuesday, April 2, 1996 @ 5:17 PM Parameter Statistics start: '94 Feb 18 end
- '96 Jan 17 Ne>. of Meas.
Maximum Stand.
Dev.
Name Units Total Minimum Variance Averaae Ranae Median 6
8 1 1.4 72 CK-CVC2141 GPM 479 7°7 2.167 79.833 4
80.