ML20199E479

Forwards SER Accepting Licensee 951116,960214 & 0524 Responses to NRC Bulletin 95-002, Unexpected Clogging of Residual Heat Removal Pump Strainer While Operating in Suppression Pool Cooling Mode, for Monticello

ML20199E479
Person / Time
Site:	Monticello
Issue date:	01/06/1999
From:	Lyon C NRC (Affiliation Not Assigned)
To:	Richard Anderson NORTHERN STATES POWER CO.
Shared Package
ML20199E482	List: ML20199E479 ML20199E487
References
IEB-95-002, IEB-95-2, TAC-M93873, NUDOCS 9901200436
Download: ML20199E479 (2)

Text

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1 January 6, 1999 l

l Mr. Roger O. Anderson, Director Nuclear Energy Engineering i Northern States Power Company ,

414 Nicollet Mall l Minneapolis, Minnesota 55401 l

SUBJECT:

RESPONSE TO NRC BULLETIN 95-02," UNEXPECTED CLOGGING OF A l

RESIDUAL HEAT REMOVAL (RHR) PUMP STRAINER WHILE OPERATING IN SUPPRESSION POOL COOLING MODE," MONTICELLO NUCLEAR GENERATING PLANT (TAC NO. M93873)

Dear Mr. Anderson:

By letters dated November 16,1995, February 14 and May 24,1996, Northern States Power Company (NSP) submitted its response to NRC Bulletin 95-02 for Monticello. The enclosure provides the staff's evaluation of NSP's response.

l NRC Bulletin 95-02 requested each licensee to review the operability of its emergency core cooling system and other pumps which draw suction from the suppression pool while pedorming their safety function. The staff requested that the licensee's evaluation be based on suppression pool cleanliness, suction strainer cleanliness, and the effectiveness of its foreign material exclusion practices. In addition, licensees were requested to implement appropriate procedural modifications and other actions (e.g., suppression pool cleaning) as necessary to minimize foreign material in the suppression pool, drywell, and containment. Licensees were also requested to verify their operability evaluation through appropriate testing and inspection.

In its response to the bulletin, by letters dated November 16,1995, February 14 and May 24, 1996, NSP demonstrated compliance with all of the requested actions. The staff has concluded that NSP's response is acceptable.

Sincerely,

• ORIGINAL SIGNED BY Carl F. Lyon, Project Manager Project Directorate 111-1 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation Docket No. 50-263

Enclosure:

As stated cc w/ encl: See next page ,'

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l J. E. Silberg, Esquire Kris Sanda, Commissioner Shaw, Pittman, Potts and Trowbridge Department of Public Service 2300 N Street, N. W. 121 Seventh Place East l Washington DC 20037 Suite 200 St. Paul, Minnesota 55101-2145 j U.S. Nuclear Regulatory Commission Resident inspector's Office Adonis A. Nebiett 2807 W. County Road 75 Assistant Attomey General l Monticello, Minnesota 55362 Office of the Attorney General 445 Minnesota Street Plant Manager Suite 900 Monticello Nuclear Generating Plant St. Paul, Minnesota 55101-2127 ATTN: Site Licensing Northern States Power Company 2807 West County Road 75 Monticello, Minnesota 55362-9637 Robert Nelson, President Minnesota Environmental Control Citizens Association (MECCA) 1051 South McKnight Road St. Paul, Minnesota 55119 Commissioner Minnesota Pollution Control Agency 520 Lafayette Road St. Paul, Minnesota 55119 Regional Administrator, Region 111 U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Commissioner of Health Minnesota Department of Health 717 Delaware Street, S. E.

Minneapolis, Minnesota 55440 Darla Groshens, Auditor / Treasurer Wright County Government Center l 10 NW Second Street Buffalo, Minnesota 55313 l

i January 1995

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