ML18054A911

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Submits Status Update of Commitments Made in Response to NRC Bulletin 88-004 & Modifies Completion Dates for Two Commitments.Procedures Will Be Revised Prior to Disassembly of HPSI or LPSI Pump No Later than 1990 Refueling Outage
ML18054A911
Person / Time
Site: Palisades Entergy icon.png
Issue date: 08/11/1989
From: Frisch R
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-88-004, IEB-88-4, TAC-69948, NUDOCS 8908180093
Download: ML18054A911 (2)


Text

consumers Power POWERING MICHIGAN'S PROGRESS General Offices: 1945 West Parnell Roa*d, Jackson, Ml 49201 * (517) 788-0550 August 11, 1989 Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLANT -

STATUS UPDATE OF COMMITMENTS MADE IN RESPONSE TO NRC BULLETIN 88 POTEN-TIAL SAFETY-RELATED PUMP LOSS (TAC NO. 69948)

By letter dated July 7, 1988, Consumers Power Company provided the required 60-day response to the subject Bulletin. *In our response we made several commitments which needed to be completed to fully address the concerns of the Bulletin. This submittal provides a status update of our commitments and modifies the completion dates for two commitments. As required by the Bulletin, a written response will be provided within 30 days of the completion of all of our actions.

Containment Spray System LCSS From our previous response concerns were identified with the two-inch minimum flow bypass lines for the containment spray pumps. These lines may not be large enough to provide the proper flow during pump testing or if a contain-ment spray pump is used for filling the safety injection bottles through the one-inch fill line. To address these .concerns the containment spray pump test procedure (Q0-16) has been revised to provide greater flow rates during testing by aligning the pump discharge through the six-inch recirculation line in addition to the two-inch bypass line. Use of the CSS pumps for filling the safety injection bottles has been evaluated to be acceptable with the primary coolant system depressurized provided all four safety injection bottles are filled simultaneously. The necessary procedure (SOP-4) revisions have been implemented. All actions needed to fully address these concerns have been completed.

l/'l Auxiliary Feedwater System (AFW) l/'l:;"l

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.... oa. From our previous response a concern was identified regarding AFW pump P-8C OJO 00 exhibiting signs of recirculation during minimum flow operation. To address 0'-1/'l OJO this concern a test procedure (T-285) has been written to establish the exact M~

AFW pump P-8C minimum flow rate. This test will be completed during the Fall 0-U 1989 Maintenance Outage -which is scheduled to start Octobe,r 1, 1989. As 00 00 previously committed any needed system modifications will be developed and CO<

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0--Q scheduled based on the results of the testing.

coa.ei OC0789-0015-NL02 r l A CMS- ENERGY' COMPANV

Palisades Plant Nuclear Regulatory Commission Updates Status to Response of IEB 88-04 August 11, 1989 2

High and Low Pressure Safety Injection (HPSI/LPSI)

From our previous response there were no immediate concerns identified regard-ing the HPSI or LPSI pumps relative to the Bulletin. However, we did commit to further investigate the possibility of recirculation or cavitation damage.

A full spectral vibration analysis of the HPSI and LPSI pumps has been com-pleted at different flow values. The vibration analyses did not identify any new concerns. The impeller and rotating element of LPSI pump P-67A has been inspected with no recirculation or cavitation damage evident. We also had committed to revise the LPSI (ESS-M-1) and HPSI (ESS-M-7) pump maintenance procedures to incorporate inspection instructions regarding damage due to recirculation or cavitation by June 30, 1989. Due to the extensive rewrite required to upgrade the procedures to recently revised administrative require-ments the June 30 date was not met. The commitment to revise the procedures is changed. The procedures will be revised prior to disassembly of a HPSI or LPSI pump but not later than the 1990 Refueling Outage. The 1990 Refueling Outage is the. earliest scheduled pump disassembly when. the revised procedures would be used.

Ralph R Frisch Senior Licensing Analyst CC Administrator, Region III, USNRC NRC Resident Inspector - Palisades OC0789-0015-NL02