ML20151R041

Confirms 880419 Telcon Re Recent Problems That Have Occurred at Plant.Licensee Should Make Available Results of Actions Taken to Correct Problems & Startup of Plant Will Only Occur W/Concurrence of Regional Administrator

ML20151R041
Person / Time
Site:	Fermi
Issue date:	04/19/1988
From:	Davis A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:	Sylvia B DETROIT EDISON CO.
References
CAL-RIII-88-09, CAL-RIII-88-9, NUDOCS 8804270221
Download: ML20151R041 (3)

Text

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! t APR i 91988 l 4

Docket No.- E0-341 CAL-RIII-88-009 l The Detroit Edison Company  !

j ATTN: B. Ralph bylvia  !

1 Group Vice President s Nuclear Operations >

3 6400 North Dixie Highway I

! Newport, MI 48166 ,

)

Dear Mr. Sylvia:

This letter confirms the telephone conversation between E, G. Greenman of this office and you on April 19, 1988, covering recent problems that h6ve  !

occurred at the Fermi facility.

1 On April 9,1988, an ESF actuation occurred wherein the Residual Heat Removal

• i (RHR) system inboard injection valve, E11-F0158, inadvertently isolated with no opetator action and ao apparent actuation signal. Without the attendant isolation of the in service shutdown cooling RHR pump suction valve, the "D  ;

3 RHR pump ran deadheaded for a period of 33 minutes. With regard to f,his matter ,

we understand that you are:

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1. Troubleshooting the RHR system to determine the root cause of the  ;

inadvertent isolation of valve E11-F0158 and formulating and implementing

, corrective action to prevent recurrence.  !

r

2. Performing an engineering evaluation and appropriate pump testing to  ;

determine whether the "D" RHR pump suffered any damage as a result of  ;

running deadheaded for 33 minutes and possible long term deleterious  !

effects, i

I  !

3. Providing us your rationale for declaring the "D" RHR pump operable, t both before and after the event.  !

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, With regard to the Moisture Separator Reheaters (MSRs) previously found l

! damaged and being repaired during the current outage, we understand that 3 you are:

l 1. Performing an engineering analysis to determine the effect of the stub

! tubes and other debris remaining in the reactor primary and balance

] of plant systems including the reactor core.

J 2. Installing strainers in the Flash Tanks and revising plant procedures to l 1

require that flow be aligned through the reactor feed pump suction j

! strainers whenever the startup level control valve is to be used.

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8804270221 880419 i PDR ADOCK 05000341 \

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Detroit Edison Company 2 APR 191988 i 3.. Obtaining a sample of reactor coolant from the lower reactor head drain line and analyzing it microscopically for the presence of stainless r. teel wool and chemically for iron, nickel and chromium. l

4. Implementing a pipi inspection program which includes opening piping at strategic locations and inventorying the debris collected in those piping ,

systems that are the suspected flow paths of the stub tubes and MSR debris, Also, rationale has been provided for those sections of piping not inspected as part of this program.

5. In aadition to the above actions that you are already taking, we )

understand that you will:

a. Implement a flushing program consisting of a long cycle flush and heater drain piping flushes back to the condenser during startup arid power ascension from the current outage,

b. Establish a weekly interval for future sampling and analysis of the reactor coolant as in 3., above,

c. After startup from the crrrent outage, and operation for some period of time at elevated power levels, open and inspect the i MSRs, reactor feed pump suction strainers, and Flash Tar.k i strainers for stub tubes, damage, degradation and debris at i the first opportunity provided by the unit being in cold I shutdown and of sufficient duration to allow the inspections to i be performed. All subsequent cold shutdowns of sufficient  !

duration will entail an inspection of the reactor feed pump 1 suction strainers and the Flash Tank strainers. Once detected all stub tubes and debris shall be removed.

In addition to the issues discussed above with the MSR and the "D" RHR pump, other operational problems related to human performance have emitinued to occur even though you have implemented programs to prevent sura occurrences.

We understand that you will evaluate the effectiveness of these programs, especially as they relate to the adequacy of administrative controls and adherence to these controls by the line organizations, and provide your written assessment to this office.

It is our understanding that you will make available the results of these activities for our review. We further understand that startup of Fermi-2 will only occur with the concurrence of the Regional Administrator or his designee. Issuance of this Confirmatory Action Letter does not preclude the issuance of an order requiring implementation of the above requirements.

None of the actions specified herein should be construed to take precedence over actions which you feel are necessary to ensure plant and personnel safety.

_ - . _ _ _ _ _ _ _ - -, -~ ,

.APR 191988 Detroit Edison Colipany 3 Please adviae me immediately if your understanding differs from that set forth' above.

Sincerely,

'. Original signed by

,L Bert Davis A. Bert Davis Regional Administrator cc: Patricia Anthony, Licensing P. A. Marquardt, Corporate Legal Department DCD/DCB(RIDS)

Licensing Fee Management Branch Resident Inspector, RlII Ronald Callen, Michigan Public Service Commission

, Harry H. Voight, Esq.

Michigan Department of Public Health Monroe County'0ffice of Civil Preparedness M. Johnson, ED0 W. Lanning, NRR F. Miraglia, NRR

, G. Holahan, NRP T. Quay, NRR J. Strasma, RIII J. Lieberman, OE L. Chandler, OGC 1

1 YEr

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