ML20206E819

Discusses Util 880707 & 1010 Responses to IE Bulletin 88-004, Potential Safety-Related Pump Loss. Requirement Will Be Fulfilled W/Submittal of Written Rept Describing Actions Taken 30 Days Following Completion of Mods

ML20206E819
Person / Time
Site:	Prairie Island
Issue date:	11/09/1988
From:	Diianni D Office of Nuclear Reactor Regulation
To:	Musolf D NORTHERN STATES POWER CO.
References
IEB-88-004, IEB-88-4, NUDOCS 8811180209
Download: ML20206E819 (4)

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'j NUCLE /.R RECOLATORY COMMISSION W ASHf NOToN. O. C. 2o655 To

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November 9, 1988 Dockets Nos.

50-282 and 50-306 Mr, D. M. Musolf, Manager Nuclear Support Services Northern States Power Company 414 Nicollet Mall Minneapolit, Minnesota 554U1

SUBJECT:

RESPONSE TO NRC BULLETIN 88-04 On May 5, 1988, the NRC staff issued NRC Bulletin 88-04, "Potentia

• Safety-Pelated Pump Loss." The bulletin requested the evaluation of all srfety-related putops for 1) pump-to pump interaction during miniflow operation that could result in dead-heading of one or more of the pumps and 2) the adequacy of the minimum flow bypass lines with respect to damage resulting from operation and testing in the minimum flow mode.

The bulletin also requested that within 60 days of receipt of the bulletin, licensees provide a written response that (a) summarizes the problems and the systems affected, (b) identifies the short-l term and long-term modifications to plant operating procedures or hardware that L

have been or are being implerrented to ensure safe plant operations, (c) identifies an appropriate schedule for long-term resolution of this and/or other significant problems that are identified as a result of this bulletin, and (d)

I provides justification for continued operation particularly with regard to General Design Criterion 35 of Appendix A to T*tle lo of the Code of Federal r

Regulations (10 CFR Part 50), "En. rgency Core Cooling" and 10 CFR 50.46, "Acceptance C iteria for Emergency Core Jooling Systems for Light Water Nuclear Power Reactors." Additionally, the staff requested that within 30 days of completion of the long-term resolution actions, that licensees provide a 7

l written response descritiing the actions taken.

I By letters dated July 7 and October 10, 1988, you responded to Bulletin 88-04.

Your response provided the information requested in a, b, c, and d above. Your i

J response also described the long-term resolution actions and identified i

completion dates of March 1989 for Unit No. 2 and Jenuary 1990 for Unit No.1 for those actions.

Your requirement in completing the response to B;11etin 88-04 will be fulfilled with the s;.tmittal of the writte,7 report describing the

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action taken, 30 days following the completion of the modifications.

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As discussed in Bulletin 88-04, you should document and maintain for at least two years an evaluation of your actions in responding to the bulletin.

These records may be subject to future auditing, i cerely, Ww 0*

v Dominic C. Dilanni, Project Manager Project Directorate III-1 Division of Reactor Projects - III, IV, V

& Special Projects cc:

See next page DISTRIBUTION DOCKET FILE NRC & LOCAL PDRs PD31 GRAY FILE GHOLAHAN HVIRGILIO DOIIANNI RINGRAM OGC EJORDAN BGRIMES ACRS (10) rj TALEXION jog (A)D/PD31 TQUAY 114(DRSP PH/PD31:DRSP hgd DDIIANNI:c>

1p/t)/88 10/c)/88

2-As discussed in Bulletin 88-04, you should document and maintain for at least two years an evaluation of your actions in responding to the bulletin.

These records may be subject to future auditing.

Sincerely, 0

Dominic C. Dilanni, Project Manager Project Directorate III-I Division of Raactor Projects - III, IV, V

& Special Projects cc:

See next page O

4 I

Mr. D. M..Musolf Prairie Island Nuclear Generating Northern States Power Company Plant cc:

Gerald Charnoff Esq.

Shaw, Pittman, Potts and Trowbridge 2300 N Street, N.W.

Washington, DC 20037 Dr. J. W. Ferman Minnesota Pollution Control Agency 520 Lafayette Roed St. Paul, MN 55155 Mr. E. L. Watzl, Plant Manager Prairie Island Nuclear Generating Plant Northern States Prar Company Route 2 Welch, Minnesota 55089 Jocelyn F. Olson, Esq.

Assistant Attorney General Environmental Protection Division Suite 200 520 Lafayette Road St. Paul, Minnesota 55155 U.S. Nuclear Regulatory Commission Resident Inspector's Office 1719 Wakonade Drive East Welch, Minnesota 550E9 Regional Administrator, Region !!!

U.S. Nuclear Regulatory Commission i

Office of Executive Director for Operations 799 Roosevelt Road Glen Ellyn. Illinois 60137 Mr. William Miller Auditor l

Goodhue County Courthouse l

Red Wing, Minnesota 55066 i

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