ML20084K150

Final Deficiency Rept,Item 121 Re Water Found in HPCI Lube Oil Reservoir.Initially Reported on 840330.Insp/rework of Main Pump & Booster Pump Mechanical Seals Will Be Performed by Vendor

ML20084K150
Person / Time
Site:	Fermi
Issue date:	04/30/1984
From:	Jens W DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
121, EF2-68535, NUDOCS 8405110121
Download: ML20084K150 (4)

Text

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.bm6 FRmCIPAL STf rF '

Wayne H. Jens A_ _' i T- >F I4,Nh Vce Presedent l'iO I i-Nuc ear Operate. ;j; ;q (' .{ f Mf 'oei IU,[.'n'"U2s lid __ j l-5.iJ m J l- A !

April 30, 1984 [~ " t \--

EF2-68535 f h' \

Mr. James G. Keppler Regional Administrator Region III U. S. Nuclear Regulatory Commission ,

799 Roosevelt Road Glen Ellyn, Illinois 60137 Dec.r Mr. Keppler:

Reference:

Fermi 2 NRC Docket No. 50-341

Subject:

Report of 10CFF50.55(e) Item #121 Concerning Water Found in the HPCI Lube Oil Reservoir On March 30, 1984, Detroit Edison's Mr. L. P. Bregni, l

Engineer - Licensing telephoned Mr. F. Jablonski of NRC Region III to report a potential deficiency concerning the f act that water had been discovered in the HPCI turbine lube oil reservoir at the Fermi 2 site.

Description of Exact Deficiency On March, 27, 1984, during a routine inspection of the HPCI i system, it was noticed that the HPCI oil reservoir level was I high. Visual examination of the oil reservoir revealed what l appeared to be approximately 2 inches of water at the bottom of the reservoir. A sample of the liquid was taken and an l analysis was performed which confirmed the liquid as high purity water. A Nonconformance Report (NCR) No. 84-0443 was i written to document the nonconforming condition.

An investigation of the source of the water was performed.

The lube oil cooler was tested pneumatically to 110 psi for 40 minutes and showed no evidence of leakage. Visual exam-i ination of the turbine bearings showed no evidence of water contamination. Neither the gear reducer nor the HPCI auxiliary oil pump showed any signs of water contamination.

Further testing was conducted and it vas determined that the leakage path of the water was through the mechanical seal of the main pump. The source of the water was from the 84051.10121 840430 PDR ADOCK 05000341 S PDR N l _2mg

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Mr. JEmas G. Koppler April 30, 1984 EF2-68535 Page 2 mechanical seal on the main pump, into the drain trough, through the bearing seal, and into the bearing oil drain line. The drain valves on the drain troughs were found closed, which allowed water to rise in the trough and flow I via the path described above into the oil reservoir. l The HPCI System Operating Procedure (SOP) 23.202 was reviewed and found to erroneously call for the drain valves in question to be in the closed position at all times. However, the preoperational test for the HPCI system does not include operation of the main or booster pumps, thus this portion of the valve lineup contained in the SOP had not been verified. t Analysis of the Safety Inspections l r

If the water contamination in the oil reservoir had gone '

undetected this condition could have rendered the HPCI inoperative. The HPCI system is an emergency core cooling system, redundant to the automatic depressurization system, ,

and is required to function to mitigate a small break loss of coolant accident.

Corrective Action ,

The NCR was dispositioned to provide the corrective action as follows: ,

(1) The vendor representative is to inspect / rework the main pump and booster pump mechanical seals.

(2) Both the main and booster pump bearings are to be inspected and cleaned.

(3) The lube oil reservoir is to be filled with SAE-4 Oil Turbo 32. 7 (4) The SOP will be revised to require the drain valves to be open at all times.

All Operations and Startup personnel will be made aware of this deficiency. ,

.It should also be noted that t h e oil quality is routinely verified under the provisions of the preventative maintenance program. In addition, the RCIC pump was verified not to have a similar problem.

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4 Mr. J&msa G. KSppler April 30, 1984 EF2-68535 Page 3 This is considered the final report on this item. Completion of the corrective actions will be tracked and verified by the '

Nuclear Quali?.y Assurance Department. If you have questions concerning this matter, please contact Mr. Lewis P. Bregni, ,

(313) 586-5083.

sincerely, h

cc P. M. Byron R. C. DeYoung [ ,

R. C. Knop

! J. W. McCormick-Barger l

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>r Mr. Jamas G. Ksppler April 30, 1984 EF2-68535  ;

Page 4 1

bec: P. P. Acharya F. C. Agosti T. A. Alessi  !

C. R. Bacon J. A. Cartmill W. F. Colbert M. K. Deora O. K. Earle W.J. Fahrner P. Fessler C. R. Gelletly A. Godoshian E. P. Griffing M. E. Haver W. R. Holland W. II . Jens R. S. Lenart E. Lusis P. A. Marquardt M. A. Michalek W. E. Miller, Jr.

E. H. Newton T. S. Nickelson S. H. Noetzel G. R. Overbeck J. H. Plona R. Pratt E. Preston, Jr.

L. E. Schuerman R. Silver D. Spiers G. M. Trahey R. A. Vance ,

W. R. Wingfield ,

Region III Chron File '

NRC File

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